github.com/ranaian/ora
-- import "gopkg.in/rana/ora.v4"
Package ora implements an Oracle database driver.
import (
"database/sql"
_ "gopkg.in/rana/ora.v4"
)
func main() {
db, err := sql.Open("ora", "user/passw@host:port/sid")
defer db.Close()
// Set timeout (Go 1.8)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
// Set prefetch count (Go 1.8)
ctx = ora.WithStmtCfg(ctx, ora.Cfg().StmtCfg.SetPrefetchCount(50000))
rows, err := db.QueryContext(ctx, "SELECT * FROM user_objects")
defer rows.Close()
}
Call stored procedure with OUT parameters:
import (
"gopkg.in/rana/ora.v4"
)
func main() {
env, srv, ses, err := ora.NewEnvSrvSes("user/passw@host:port/sid")
if err != nil {
log.Fatal(err)
}
defer env.Close()
defer srv.Close()
defer ses.Close()
var user string
if _, err = ses.PrepAndExe("BEGIN :1 := SYS_CONTEXT('USERENV', :2); END;", &res, "SESSION_USER"); err != nil {
log.Fatal(err)
}
log.Printf("user: %q", user)
}
An Oracle database may be accessed through the database/sql package or through the ora package directly. database/sql offers connection pooling, thread safety, a consistent API to multiple database technologies and a common set of Go types. The ora package offers additional features including pointers, slices, nullable types, numerics of various sizes, Oracle-specific types, Go return type configuration, and Oracle abstractions such as environment, server and session.
The ora package is written with the Oracle Call Interface (OCI) C-language libraries provided by Oracle. The OCI libraries are a standard for client application communication and driver communication with Oracle databases.
The ora package has been verified to work with:
Oracle Standard 11g (11.2.0.4.0), Linux x86_64 (RHEL6)
Oracle Enterprise 12c (12.1.0.1.0), Windows 8.1 and AMD64.
Minimum requirements are Go 1.3 with CGO enabled, a GCC C compiler, and Oracle 11g (11.2.0.4.0) or Oracle Instant Client (11.2.0.4.0).
Install Oracle or Oracle Instant Client.
Copy the oci8.pc from the contrib folder (or the one for
your system, maybe tailored to your specific locations) to a folder in
$PKG_CONFIG_PATH or a system folder, such as
cp -aL contrib/oci8.pc /usr/local/lib/pkgconfig/oci8.pc
The ora package has no external Go dependencies and is available on GitHub and gopkg.in:
go get gopkg.in/rana/ora.v4
WARNING: If you have Oracle Instant Client 11.2, you'll need to add "=lnnz11" to the list of linked libs! Otherwise, you may encounter "undefined reference to `nzosSCSP_SetCertSelectionParams' " errors. Oracle Instant Client 12.1 does not need this.
The ora package supports all built-in Oracle data types. The supported Oracle built-in data types are NUMBER, BINARY_DOUBLE, BINARY_FLOAT, FLOAT, DATE, TIMESTAMP, TIMESTAMP WITH TIME ZONE, TIMESTAMP WITH LOCAL TIME ZONE, INTERVAL YEAR TO MONTH, INTERVAL DAY TO SECOND, CHAR, NCHAR, VARCHAR, VARCHAR2, NVARCHAR2, LONG, CLOB, NCLOB, BLOB, LONG RAW, RAW, ROWID and BFILE. SYS_REFCURSOR is also supported.
Oracle does not provide a built-in boolean type. Oracle provides a single-byte character type. A common practice is to define two single-byte characters which represent true and false. The ora package adopts this approach. The oracle package associates a Go bool value to a Go rune and sends and receives the rune to a CHAR(1 BYTE) column or CHAR(1 CHAR) column.
The default false rune is zero '0'. The default true rune is one '1'. The bool rune association may be configured or disabled when directly using the ora package but not with the database/sql package.
Within a SQL string a placeholder may be specified to indicate where a Go variable is placed. The SQL placeholder is an Oracle identifier, from 1 to 30 characters, prefixed with a colon (:). For example:
// example Oracle placeholder uses a colon
INSERT INTO T1 (C1) VALUES (:C1)
Placeholders within a SQL statement are bound by position. The actual name is not used by the ora package driver e.g., placeholder names :c1, :1, or :xyz are treated equally.
The database/sql package provides a LastInsertId method to return the last
inserted row's id. Oracle does not provide such functionality, but if you append
... RETURNING col /*LastInsertId*/ to your SQL, then it will be presented as
LastInsertId. Note that you have to mark with a /*LastInsertId*/ (case
insensitive) your RETURNING part, to allow ora to return the last column as
LastInsertId(). That column must fit in int64, though!
You may access an Oracle database through the database/sql package. The database/sql package offers a consistent API across different databases, connection pooling, thread safety and a set of common Go types. database/sql makes working with Oracle straight-forward.
The ora package implements interfaces in the database/sql/driver package enabling database/sql to communicate with an Oracle database. Using database/sql ensures you never have to call the ora package directly.
When using database/sql, the mapping between Go types and Oracle types may be changed slightly. The database/sql package has strict expectations on Go return types. The Go-to-Oracle type mapping for database/sql is:
Go type Oracle type
int64 NUMBER°, BINARY_DOUBLE, BINARY_FLOAT, FLOAT
float64 NUMBER¹, BINARY_DOUBLE, BINARY_FLOAT, FLOAT
time.Time TIMESTAMP, TIMESTAMP WITH TIME ZONE, TIMESTAMP WITH LOCAL TIME ZONE, DATE
string CHAR², NCHAR, VARCHAR, VARCHAR2, NVARCHAR2, LONG, CLOB, NCLOB
bool CHAR(1 BYTE)³, CHAR(1 CHAR)³
[]byte BLOB, LONG RAW, RAW
° A select-list column defined as an Oracle NUMBER with zero scale e.g.,
NUMBER(10,0) is returned as an int64. Either int64 or float64 may be inserted
into a NUMBER column with zero scale. float64 insertion will have its fractional
part truncated.
¹ A select-list column defined as an Oracle NUMBER with a scale greater than
zero e.g., NUMBER(10,4) is returned as a float64. Either int64 or float64 may
be inserted into a NUMBER column with a scale greater than zero.
² A select-list column defined as an Oracle CHAR with a length greater than 1
e.g., CHAR(2 BYTE) or CHAR(2 CHAR) is returned as a string. A Go string of any
length up to the column max length may be inserted into the CHAR column.
³ The Go bool value false is mapped to the zero rune '0'. The Go bool value
true is mapped to the one rune '1'.
The "ora" driver is automatically registered for use with sql.Open, but you can call ora.SetCfg to set the used configuration options including statement configuration and Rset configuration.
func init() {
drvCfg := ora.Cfg()
drvCfg.FalseRune = 'N'
drvCfg.TrueRune = 'Y'
drvCfg.TrueRune = 'Y'
ora.SetCfg(drvCfg)
}
When configuring the driver for use with database/sql, keep in mind that database/sql has strict Go type-to-Oracle type mapping expectations.
The ora package allows programming with pointers, slices, nullable types, numerics of various sizes, Oracle-specific types, Go return type configuration, and Oracle abstractions such as environment, server and session. When working with the ora package directly, the API is slightly different than database/sql.
When using the ora package directly, the mapping between Go types and Oracle types may be changed. The Go-to-Oracle type mapping for the ora package is:
Go type Oracle type
int64, int32, int16, int8 NUMBER°, BINARY_DOUBLE, BINARY_FLOAT, FLOAT
uint64, uint32, uint16, uint8
Int64, Int32, Int16, Int8
Uint64, Uint32, Uint16, Uint8
*int64, *int32, *int16, *int8
*uint64, *uint32, *uint16, *uint8
[]int64, []int32, []int16, []int8
[]uint64, []uint32, []uint16, []uint8
[]Int64, []Int32, []Int16, []Int8
[]Uint64, []Uint32, []Uint16, []Uint8
float64, float32 NUMBER¹, BINARY_DOUBLE, BINARY_FLOAT, FLOAT
Float64, Float32
*float64, *float32
[]float64, []float32
[]Float64, []Float32
time.Time TIMESTAMP, TIMESTAMP WITH TIME ZONE,
Time TIMESTAMP WITH LOCAL TIME ZONE, DATE
*time.Time
[]time.Time
[]Time
string CHAR², NCHAR, VARCHAR, VARCHAR2,
String NVARCHAR2, LONG, CLOB, NCLOB, ROWID
*string
[]string
[]String
bool CHAR(1 BYTE)³, CHAR(1 CHAR)³
Bool
*bool
[]bool
[]Bool
[]byte, [][]byte BLOB
Lob, []Lob, *Lob BLOB, CLOB
Raw, []Raw RAW, LONG RAW
IntervalYM INTERVAL MONTH TO YEAR
[]IntervalYM
IntervalDS INTERVAL DAY TO SECOND
[]IntervalDS
Bfile BFILE
° A select-list column defined as an Oracle NUMBER with zero scale e.g.,
NUMBER(10,0) is returned as an int64 by default. Integer and floating point
numerics may be inserted into a NUMBER column with zero scale. Inserting a
floating point numeric will have its fractional part truncated.
¹ A select-list column defined as an Oracle NUMBER with a scale greater than
zero e.g., NUMBER(10,4) is returned as a float64 by default. Integer and
floating point numerics may be inserted into a NUMBER column with a scale
greater than zero.
² A select-list column defined as an Oracle CHAR with a length greater than 1
e.g., CHAR(2 BYTE) or CHAR(2 CHAR) is returned as a string. A Go string of any
length up to the column max length may be inserted into the CHAR column.
³ The Go bool value false is mapped to the zero rune '0'. The Go bool value
true is mapped to the one rune '1'.
An example of using the ora package directly:
package main
import (
"fmt"
"gopkg.in/rana/ora.v4"
)
func main() {
// example usage of the ora package driver
// connect to a server and open a session
env, err := ora.OpenEnv()
defer env.Close()
if err != nil {
panic(err)
}
srvCfg := ora.SrvCfg{Dblink: "orcl"}
srv, err := env.OpenSrv(&srvCfg)
defer srv.Close()
if err != nil {
panic(err)
}
sesCfg := ora.SesCfg{
Username: "test",
Password: "test",
}
ses, err := srv.OpenSes(sesCfg)
defer ses.Close()
if err != nil {
panic(err)
}
// create table
tableName := "t1"
stmtTbl, err := ses.Prep(fmt.Sprintf("CREATE TABLE %v "+
"(C1 NUMBER(19,0) GENERATED ALWAYS AS IDENTITY "+
"(START WITH 1 INCREMENT BY 1), C2 VARCHAR2(48 CHAR))", tableName))
defer stmtTbl.Close()
if err != nil {
panic(err)
}
rowsAffected, err := stmtTbl.Exe()
if err != nil {
panic(err)
}
fmt.Println(rowsAffected)
// begin first transaction
tx1, err := ses.StartTx()
if err != nil {
panic(err)
}
// insert record
var id uint64
str := "Go is expressive, concise, clean, and efficient."
stmtIns, err := ses.Prep(fmt.Sprintf(
"INSERT INTO %v (C2) VALUES (:C2) RETURNING C1 INTO :C1", tableName))
defer stmtIns.Close()
rowsAffected, err = stmtIns.Exe(str, &id)
if err != nil {
panic(err)
}
fmt.Println(rowsAffected)
// insert nullable String slice
a := make([]ora.String, 4)
a[0] = ora.String{Value: "Its concurrency mechanisms make it easy to"}
a[1] = ora.String{IsNull: true}
a[2] = ora.String{Value: "It's a fast, statically typed, compiled"}
a[3] = ora.String{Value: "One of Go's key design goals is code"}
stmtSliceIns, err := ses.Prep(fmt.Sprintf(
"INSERT INTO %v (C2) VALUES (:C2)", tableName))
defer stmtSliceIns.Close()
if err != nil {
panic(err)
}
rowsAffected, err = stmtSliceIns.Exe(a)
if err != nil {
panic(err)
}
fmt.Println(rowsAffected)
// fetch records
stmtQry, err := ses.Prep(fmt.Sprintf(
"SELECT C1, C2 FROM %v", tableName))
defer stmtQry.Close()
if err != nil {
panic(err)
}
rset, err := stmtQry.Qry()
if err != nil {
panic(err)
}
for rset.Next() {
fmt.Println(rset.Row[0], rset.Row[1])
}
if err := rset.Err(); err != nil {
panic(err)
}
// commit first transaction
err = tx1.Commit()
if err != nil {
panic(err)
}
// begin second transaction
tx2, err := ses.StartTx()
if err != nil {
panic(err)
}
// insert null String
nullableStr := ora.String{IsNull: true}
stmtTrans, err := ses.Prep(fmt.Sprintf(
"INSERT INTO %v (C2) VALUES (:C2)", tableName))
defer stmtTrans.Close()
if err != nil {
panic(err)
}
rowsAffected, err = stmtTrans.Exe(nullableStr)
if err != nil {
panic(err)
}
fmt.Println(rowsAffected)
// rollback second transaction
err = tx2.Rollback()
if err != nil {
panic(err)
}
// fetch and specify return type
stmtCount, err := ses.Prep(fmt.Sprintf(
"SELECT COUNT(C1) FROM %v WHERE C2 IS NULL", tableName), ora.U8)
defer stmtCount.Close()
if err != nil {
panic(err)
}
rset, err = stmtCount.Qry()
if err != nil {
panic(err)
}
row := rset.NextRow()
if row != nil {
fmt.Println(row[0])
}
if err := rset.Err(); err != nil {
panic(err)
}
// create stored procedure with sys_refcursor
stmtProcCreate, err := ses.Prep(fmt.Sprintf(
"CREATE OR REPLACE PROCEDURE PROC1(P1 OUT SYS_REFCURSOR) AS BEGIN "+
"OPEN P1 FOR SELECT C1, C2 FROM %v WHERE C1 > 2 ORDER BY C1; "+
"END PROC1;",
tableName))
defer stmtProcCreate.Close()
rowsAffected, err = stmtProcCreate.Exe()
if err != nil {
panic(err)
}
// call stored procedure
// pass *Rset to Exe to receive the results of a sys_refcursor
stmtProcCall, err := ses.Prep("CALL PROC1(:1)")
defer stmtProcCall.Close()
if err != nil {
panic(err)
}
procRset := &ora.Rset{}
rowsAffected, err = stmtProcCall.Exe(procRset)
if err != nil {
panic(err)
}
if procRset.IsOpen() {
for procRset.Next() {
fmt.Println(procRset.Row[0], procRset.Row[1])
}
if err := procRset.Err(); err != nil {
panic(err)
}
fmt.Println(procRset.Len())
}
// Output:
// 0
// 1
// 4
// 1 Go is expressive, concise, clean, and efficient.
// 2 Its concurrency mechanisms make it easy to
// 3
// 4 It's a fast, statically typed, compiled
// 5 One of Go's key design goals is code
// 1
// 1
// 3
// 4 It's a fast, statically typed, compiled
// 5 One of Go's key design goals is code
// 3
}
Pointers may be used to capture out-bound values from a SQL statement such as an insert or stored procedure call. For example, a numeric pointer captures an identity value:
// given:
// CREATE TABLE T1 (
// C1 NUMBER(19,0) GENERATED ALWAYS AS IDENTITY (START WITH 1 INCREMENT BY 1),
// C2 VARCHAR2(48 CHAR))
var id int64
stmt, err = ses.Prep("INSERT INTO T1 (C2) VALUES ('GO') RETURNING C1 INTO :C1")
stmt.Exe(&id)
A string pointer captures an out parameter from a stored procedure:
// given:
// CREATE OR REPLACE PROCEDURE PROC1 (P1 OUT VARCHAR2) AS BEGIN P1 := 'GO'; END PROC1;
var str string
stmt, err = ses.Prep("CALL PROC1(:1)")
stmt.Exe(&str)
Slices may be used to insert multiple records with a single insert statement:
// insert one million rows with single insert statement
// given: CREATE TABLE T1 (C1 NUMBER)
values := make([]int64, 1000000)
for n, _ := range values {
values[n] = int64(n)
}
rowsAffected, err := ses.PrepAndExe("INSERT INTO T1 (C1) VALUES (:C1)", values)
The ora package provides nullable Go types to support DML operations such as insert and select. The nullable Go types provided by the ora package are Int64, Int32, Int16, Int8, Uint64, Uint32, Uint16, Uint8, Float64, Float32, Time, IntervalYM, IntervalDS, String, Bool, Binary and Bfile. For example, you may insert nullable Strings and select nullable Strings:
// insert String slice
// given: CREATE TABLE T1 (C1 VARCHAR2(48 CHAR))
a := make([]ora.String, 5)
a[0] = ora.String{Value: "Go is expressive, concise, clean, and efficient."}
a[1] = ora.String{Value: "Its concurrency mechanisms make it easy to"}
a[2] = ora.String{IsNull: true}
a[3] = ora.String{Value: "It's a fast, statically typed, compiled"}
a[4] = ora.String{Value: "One of Go's key design goals is code"}
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (:C1)")
stmt.Exe(a)
// Specify OraS to Prep method to return ora.String values
// fetch records
stmt, err = ses.Prep("SELECT C1 FROM T1", OraS)
rset, err := stmt.Qry()
for rset.Next() {
fmt.Println(rset.Row[0])
}
The Stmt.Prep method is variadic accepting zero or more GoColumnType which
define a Go return type for a select-list column. For example, a Prep call can
be configured to return an int64 and a nullable Int64 from the same column:
// given: create table t1 (c1 number)
stmt, err = ses.Prep("SELECT C1, C1 FROM T1", ora.I64, ora.OraI64)
rset, err := stmt.Qry()
for rset.Next() {
fmt.Println(rset.Row[0], rset.Row[1])
}
Go numerics of various sizes are supported in DML operations. The ora package supports int64, int32, int16, int8, uint64, uint32, uint16, uint8, float64 and float32. For example, you may insert a uint16 and select numerics of various sizes:
// insert uint16
// given: create table t1 (c1 number)
value := uint16(9)
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (:C1)")
stmt.Exe(value)
// select numerics of various sizes from the same column
stmt, err = ses.Prep(
"SELECT C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, FROM T1",
ora.I64, ora.I32, ora.I16, ora.I8, ora.U64, ora.U32, ora.U16, ora.U8,
ora.F64, ora.F32)
rset, err := stmt.Qry()
row := rset.NextRow()
If a non-nullable type is defined for a nullable column returning null, the Go type's zero value is returned.
GoColumnTypes defined by the ora package are:
Go type GoColumnType
int64 I64
int32 I32
int16 I16
int8 I8
uint64 U64
uint32 U32
uint16 U16
uint8 U8
float64 F64
Int64 OraI64
Int32 OraI32
Int16 OraI16
Int8 OraI8
Uint64 OraU64
Uint32 OraU32
Uint16 OraU16
Uint8 OraU8
Float64 OraF64
Float32 OraF32
time.Time T
Time OraT
string S
String OraS
bool B
Bool OraB
[]byte Bin
Raw Bin
Lob° Bin or S
default¹ D
° Lob will return binary data if the Oracle column is a BLOB; otherwise, Lob
will return a string if the Oracle column is a CLOB.
¹ D represents a default mapping between a select-list column and a Go type.
The default mapping is defined in RsetCfg.
When Stmt.Prep doesn't receive a GoColumnType, or receives an incorrect GoColumnType, the default value defined in RsetCfg is used.
EnvCfg, SrvCfg, SesCfg, StmtCfg and RsetCfg are the main configuration structs. EnvCfg configures aspects of an Env. SrvCfg configures aspects of a Srv. SesCfg configures aspects of a Ses. StmtCfg configures aspects of a Stmt. RsetCfg configures aspects of Rset. StmtCfg and RsetCfg have the most options to configure. RsetCfg defines the default mapping between an Oracle select-list column and a Go type. StmtCfg may be set in an EnvCfg, SrvCfg, SesCfg and StmtCfg. RsetCfg may be set in a Stmt.
EnvCfg.StmtCfg, SrvCfg.StmtCfg, SesCfg.StmtCfg may optionally be specified to configure a statement. If StmtCfg isn't specified default values are applied. EnvCfg.StmtCfg, SrvCfg.StmtCfg, SesCfg.StmtCfg cascade to new descendent structs. When ora.OpenEnv() is called a specified EnvCfg is used or a default EnvCfg is created. Creating a Srv with env.OpenSrv() will use SrvCfg.StmtCfg if it is specified; otherwise, EnvCfg.StmtCfg is copied by value to SrvCfg.StmtCfg. Creating a Ses with srv.OpenSes() will use SesCfg.StmtCfg if it is specified; otherwise, SrvCfg.StmtCfg is copied by value to SesCfg.StmtCfg. Creating a Stmt with ses.Prep() will use SesCfg.StmtCfg if it is specified; otherwise, a new StmtCfg with default values is set on the Stmt. Call Stmt.Cfg() to change a Stmt's configuration.
An Env may contain multiple Srv. A Srv may contain multiple Ses. A Ses may contain multiple Stmt. A Stmt may contain multiple Rset.
// StmtCfg cascades to descendent structs
// EnvCfg -> SrvCfg -> SesCfg -> StmtCfg -> RsetCfg
Setting a RsetCfg on a StmtCfg does not cascade through descendent structs. Configuration of Stmt.Cfg takes effect prior to calls to Stmt.Exe and Stmt.Qry; consequently, any updates to Stmt.Cfg after a call to Stmt.Exe or Stmt.Qry are not observed.
One configuration scenario may be to set a server's select statements to return nullable Go types by default:
sc := &ora.SrvCfg{Dblink: "orcl"}
sc.Dblink = "orcl"
cfg := NewStmtCfg().
SetNumberInt(ora.OraI64).
SetNumberFloat(ora.OraF64).
SetBinaryDouble(ora.OraF64).
SetBinaryFloat(ora.OraF64).
SetFloat(ora.OraF64).
SetDate(ora.OraT).
SetTimestamp(ora.OraT).
SetTimestampTz(ora.OraT).
SetTimestampLtz(ora.OraT).
SetChar1(ora.OraS).
SetVarchar(ora.OraS).
SetLong(ora.OraS).
SetClob(ora.OraS).
SetBlob(ora.OraBin).
SetRaw(ora.OraBin).
SetLongRaw(ora.OraBin).
SetFetchLen(100).
SetLOBFetchLen(100)
sc.StmtCfg = cfg
srv, err := env.OpenSrv(sc)
// any new SesCfg.StmtCfg, StmtCfg.Cfg will receive this StmtCfg
// any new Rset will receive the StmtCfg.Rset configuration
Another scenario may be to configure the runes mapped to bool values:
// update StmtCfg to change the FalseRune and TrueRune inserted into the database
// given: CREATE TABLE T1 (C1 CHAR(1 BYTE))
stmt.Cfg().Char1(ora.OraB)
// insert 'false' record
var falseValue bool = false
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (:C1)")
stmt.Cfg().FalseRune = 'N'
stmt.Exe(falseValue)
// insert 'true' record
var trueValue bool = true
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (:C1)")
stmt.Cfg().TrueRune = 'Y'
stmt.Exe(trueValue)
// update RsetCfg to change the TrueRune
// used to translate an Oracle char to a Go bool
// fetch inserted records
stmt, err = ses.Prep("SELECT C1 FROM T1")
stmt.Cfg().Rset.TrueRune = 'Y'
rset, err := stmt.Qry()
for rset.Next() {
fmt.Println(rset.Row[0])
}
Oracle-specific types offered by the ora package are ora.Rset, ora.IntervalYM, ora.IntervalDS, ora.Raw, ora.Lob and ora.Bfile. ora.Rset represents an Oracle SYS_REFCURSOR. ora.IntervalYM represents an Oracle INTERVAL YEAR TO MONTH. ora.IntervalDS represents an Oracle INTERVAL DAY TO SECOND. ora.Raw represents an Oracle RAW or LONG RAW. ora.Lob may represent an Oracle BLOB or Oracle CLOB. And ora.Bfile represents an Oracle BFILE. ROWID columns are returned as strings and don't have a unique Go type.
The default for SELECTing [BC]LOB columns is a safe Bin or S, which means all the contents of the LOB is slurped into memory and returned as a []byte or string.
The DefaultLOBFetchLen says LOBs are prefetched only a minimal way, to minimize
extra memory usage - you can override this using
stmt.SetCfg(stmt.Cfg().SetLOBFetchLen(100)).
If you want more control, you can use ora.L in Prep, Qry or
ses.SetCfg(ses.Cfg().SetBlob(ora.L)). But keep in mind that Oracle restricts
the use of LOBs: it is forbidden to do ANYTHING while reading the LOB! No
another query, no exec, no close of the Rset - even advance to the next record
in the result set is forbidden!
Failing to adhere these rules results in "Invalid handle" and ORA-03127 errors.
You cannot start reading another LOB till you haven't finished reading the previous LOB, not even in the same row! Failing this results in ORA-24804!
For examples, see z_lob_test.go.
Rset is used to obtain Go values from a SQL select statement. Methods Rset.Next, Rset.NextRow, and Rset.Len are available. Fields Rset.Row, Rset.Err, Rset.Index, and Rset.ColumnNames are also available. The Next method attempts to load data from an Oracle buffer into Row, returning true when successful. When no data is available, or if an error occurs, Next returns false setting Row to nil. Any error in Next is assigned to Err. Calling Next increments Index and method Len returns the total number of rows processed. The NextRow method is convenient for returning a single row. NextRow calls Next and returns Row. ColumnNames returns the names of columns defined by the SQL select statement.
Rset has two usages. Rset may be returned from Stmt.Qry when prepared with a SQL select statement:
// given: CREATE TABLE T1 (C1 NUMBER, C2, CHAR(1 BYTE), C3 VARCHAR2(48 CHAR))
stmt, err = ses.Prep("SELECT C1, C2, C3 FROM T1")
rset, err := stmt.Qry()
for rset.Next() {
fmt.Println(rset.Index, rset.Row[0], rset.Row[1], rset.Row[2])
}
Or, *Rset may be passed to Stmt.Exe when prepared with a stored procedure accepting an OUT SYS_REFCURSOR parameter:
// given:
// CREATE TABLE T1 (C1 NUMBER, C2 VARCHAR2(48 CHAR))
// CREATE OR REPLACE PROCEDURE PROC1(P1 OUT SYS_REFCURSOR) AS
// BEGIN OPEN P1 FOR SELECT C1, C2 FROM T1 ORDER BY C1; END PROC1;
stmt, err = ses.Prep("CALL PROC1(:1)")
rset := &ora.Rset{}
stmt.Exe(rset)
if rset.IsOpen() {
for rset.Next() {
fmt.Println(rset.Row[0], rset.Row[1])
}
}
Stored procedures with multiple OUT SYS_REFCURSOR parameters enable a single Exe call to obtain multiple Rsets:
// given:
// CREATE TABLE T1 (C1 NUMBER, C2 VARCHAR2(48 CHAR))
// CREATE OR REPLACE PROCEDURE PROC1(P1 OUT SYS_REFCURSOR, P2 OUT SYS_REFCURSOR) AS
// BEGIN OPEN P1 FOR SELECT C1 FROM T1 ORDER BY C1; OPEN P2 FOR SELECT C2 FROM T1 ORDER BY C2;
// END PROC1;
stmt, err = ses.Prep("CALL PROC1(:1, :2)")
rset1 := &ora.Rset{}
rset2 := &ora.Rset{}
stmt.Exe(rset1, rset2)
// read from first cursor
if rset1.IsOpen() {
for rset1.Next() {
fmt.Println(rset1.Row[0])
}
}
// read from second cursor
if rset2.IsOpen() {
for rset2.Next() {
fmt.Println(rset2.Row[0])
}
}
The types of values assigned to Row may be configured in StmtCfg.Rset. For configuration to take effect, assign StmtCfg.Rset prior to calling Stmt.Qry or Stmt.Exe.
Rset prefetching may be controlled by StmtCfg.PrefetchRowCount and StmtCfg.PrefetchMemorySize. PrefetchRowCount works in coordination with PrefetchMemorySize. When PrefetchRowCount is set to zero only PrefetchMemorySize is used; otherwise, the minimum of PrefetchRowCount and PrefetchMemorySize is used. The default uses a PrefetchMemorySize of 134MB.
Opening and closing Rsets is managed internally. Rset does not have an Open method or Close method.
IntervalYM may be be inserted and selected:
// insert IntervalYM slice
// given: CREATE TABLE T1 (C1 INTERVAL YEAR TO MONTH)
a := make([]ora.IntervalYM, 5)
a[0] = ora.IntervalYM{Year: 1, Month: 1}
a[1] = ora.IntervalYM{Year: 99, Month: 9}
a[2] = ora.IntervalYM{IsNull: true}
a[3] = ora.IntervalYM{Year: -1, Month: -1}
a[4] = ora.IntervalYM{Year: -99, Month: -9}
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (:C1)")
stmt.Exe(a)
// query IntervalYM
stmt, err = ses.Prep("SELECT C1 FROM T1")
rset, err := stmt.Qry()
for rset.Next() {
fmt.Println(rset.Row[0])
}
IntervalDS may be be inserted and selected:
// insert IntervalDS slice
// given: CREATE TABLE T1 (C1 INTERVAL DAY TO SECOND)
a := make([]ora.IntervalDS, 5)
a[0] = ora.IntervalDS{Day: 1, Hour: 1, Minute: 1, Second: 1, Nanosecond: 123456789}
a[1] = ora.IntervalDS{Day: 59, Hour: 59, Minute: 59, Second: 59, Nanosecond: 123456789}
a[2] = ora.IntervalDS{IsNull: true}
a[3] = ora.IntervalDS{Day: -1, Hour: -1, Minute: -1, Second: -1, Nanosecond: -123456789}
a[4] = ora.IntervalDS{Day: -59, Hour: -59, Minute: -59, Second: -59, Nanosecond: -123456789}
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (:C1)")
stmt.Exe(a)
// query IntervalDS
stmt, err = ses.Prep("SELECT C1 FROM T1")
rset, err := stmt.Qry()
for rset.Next() {
fmt.Println(rset.Row[0])
}
Transactions on an Oracle server are supported. DML statements auto-commit unless a transaction has started:
// given: CREATE TABLE T1 (C1 NUMBER)
// rollback
tx, err := ses.StartTx()
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (3)")
stmt.Exe()
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (5)")
stmt.Exe()
tx.Rollback()
// commit
tx, err = ses.StartTx()
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (7)")
stmt.Exe()
stmt, err = ses.Prep("INSERT INTO T1 (C1) VALUES (9)")
stmt.Exe()
tx.Commit()
// fetch records
stmt, err = ses.Prep("SELECT C1 FROM T1")
rset, err := stmt.Qry()
for rset.Next() {
fmt.Println(rset.Row[0])
}
Ses.PrepAndExe, Ses.PrepAndQry, Ses.Ins, Ses.Upd, and Ses.Sel are convenient one-line methods.
Ses.PrepAndExe offers a convenient one-line call to Ses.Prep and Stmt.Exe.
rowsAffected, err := ses.PrepAndExe("CREATE TABLE T1 (C1 NUMBER)")
Ses.PrepAndQry offers a convenient one-line call to Ses.Prep and Stmt.Qry.
rset, err := ses.PrepAndQry("SELECT CURRENT_TIMESTAMP FROM DUAL")
Ses.Ins composes, prepares and executes a sql INSERT statement. Ses.Ins is useful when you have to create and maintain a simple INSERT statement with a long list of columns. As table columns are added and dropped over the lifetime of a table Ses.Ins is easy to read and revise.
err = ses.Ins("T1",
"C2", e.C2,
"C3", e.C3,
"C4", e.C4,
"C5", e.C5,
"C6", e.C6,
"C7", e.C7,
"C8", e.C8,
"C9", e.C9,
"C10", e.C10,
"C11", e.C11,
"C12", e.C12,
"C13", e.C13,
"C14", e.C14,
"C15", e.C15,
"C16", e.C16,
"C17", e.C17,
"C18", e.C18,
"C19", e.C19,
"C20", e.C20,
"C21", e.C21,
"C1", &e.C1)
Ses.Upd composes, prepares and executes a sql UPDATE statement. Ses.Upd is useful when you have to create and maintain a simple UPDATE statement with a long list of columns. As table columns are added and dropped over the lifetime of a table Ses.Upd is easy to read and revise.
err = ses.Upd("T1",
"C2", e.C2*2,
"C3", e.C3*2,
"C4", e.C4*2,
"C5", e.C5*2,
"C6", e.C6*2,
"C7", e.C7*2,
"C8", e.C8*2,
"C9", e.C9*2,
"C10", e.C10*2,
"C11", e.C11*2,
"C12", e.C12*2,
"C13", e.C13*2,
"C14", e.C14*2,
"C15", e.C15*2,
"C16", e.C16*2,
"C17", e.C17*2,
"C18", e.C18*2,
"C19", e.C19*2,
"C20", e.C20*2,
"C21", e.C21*2,
"C1", e.C1)
Ses.Sel composes, prepares and queries a sql SELECT statement. Ses.Sel is useful when you have to create and maintain a simple SELECT statement with a long list of columns that have non-default GoColumnTypes. As table columns are added and dropped over the lifetime of a table Ses.Sel is easy to read and revise.
rset, err := ses.Sel("T1",
"C1", ora.U64,
"C2", ora.F64,
"C3", ora.I8,
"C4", ora.I16,
"C5", ora.I32,
"C6", ora.I64,
"C7", ora.U8,
"C8", ora.U16,
"C9", ora.U32,
"C10", ora.U64,
"C11", ora.F32,
"C12", ora.F64,
"C13", ora.I8,
"C14", ora.I16,
"C15", ora.I32,
"C16", ora.I64,
"C17", ora.U8,
"C18", ora.U16,
"C19", ora.U32,
"C20", ora.U64,
"C21", ora.F32)
The Ses.Ping method checks whether the client's connection to an Oracle server is valid. A call to Ping requires an open Ses. Ping will return a nil error when the connection is fine:
// open a session before calling Ping
ses, _ := srv.OpenSes("username", "password")
err := ses.Ping()
if err == nil {
fmt.Println("Ping successful")
}
The Srv.Version method is available to obtain the Oracle server version. A call to Version requires an open Ses:
// open a session before calling Version
ses, err := srv.OpenSes("username", "password")
version, err := srv.Version()
if version != "" && err == nil {
fmt.Println("Received version from server")
}
Further code examples are available in the example file, test files and samples folder.
The ora package provides a simple ora.Logger interface for logging. Logging is disabled by default. Specify one of three optional built-in logging packages to enable logging; or, use your own logging package.
ora.Cfg().Log offers various options to enable or disable logging of specific ora driver methods. For example:
// enable logging of the Rset.Next method
ora.Cfg().Log.Rset.Next = true
To use the standard Go log package:
import (
"gopkg.in/rana/ora.v4"
"gopkg.in/rana/ora.v4/lg"
)
func main() {
// use an optional log package for ora logging
ora.Cfg().Log.Logger = lg.Log
}
which produces a sample log of:
ORA I 2015/05/23 16:54:44.615462 drv.go:411: OpenEnv 1
ORA I 2015/05/23 16:54:44.626443 drv.go:411: OpenEnv 2
ORA I 2015/05/23 16:54:44.627465 env.go:115: E2] OpenSrv (dbname orcl)
ORA I 2015/05/23 16:54:44.643449 env.go:150: E2] OpenSrv (srvId 1)
ORA I 2015/05/23 16:54:44.643449 srv.go:113: E2S1] OpenSes (username test)
ORA I 2015/05/23 16:54:44.665451 ses.go:163: E2S1S1] Prep: SELECT CURRENT_TIMESTAMP FROM DUAL
ORA I 2015/05/23 16:54:44.666451 rset.go:205: E2S1S1S1R0] open
ORA I 2015/05/23 16:54:44.666451 ses.go:74: E2S1S1] Close
ORA I 2015/05/23 16:54:44.666451 stmt.go:78: E2S1S1S1] Close
ORA I 2015/05/23 16:54:44.666451 rset.go:57: E2S1S1S1R0] close
ORA I 2015/05/23 16:54:44.666451 srv.go:63: E2S1] Close
ORA I 2015/05/23 16:54:44.667451 env.go:68: E2] Close
Messages are prefixed with 'ORA I' for information or 'ORA E' for an error. The log package is configured to write to os.Stderr by default. Use the ora/lg.Std type to configure an alternative io.Writer.
To use the glog package:
import (
"flag"
"gopkg.in/rana/ora.v4"
"gopkg.in/rana/ora.v4/glg"
)
func main() {
// parse flags for glog (required)
// consider specifying cmd line arg -alsologtostderr=true
flag.Parse()
// use the optional glog package for ora logging
cfg := ora.Cfg()
cfg.Log.Logger = glg.Log
ora.SetCfg(cfg)
}
which produces a sample log of:
I0523 17:31:41.702365 97708 drv.go:411] OpenEnv 1
I0523 17:31:41.728377 97708 drv.go:411] OpenEnv 2
I0523 17:31:41.728377 97708 env.go:115] E2] OpenSrv (dbname orcl)
I0523 17:31:41.741390 97708 env.go:150] E2] OpenSrv (srvId 1)
I0523 17:31:41.741390 97708 srv.go:113] E2S1] OpenSes (username test)
I0523 17:31:41.762366 97708 ses.go:163] E2S1S1] Prep: SELECT CURRENT_TIMESTAMP FROM DUAL
I0523 17:31:41.762366 97708 rset.go:205] E2S1S1S1R0] open
I0523 17:31:41.762366 97708 ses.go:74] E2S1S1] Close
I0523 17:31:41.762366 97708 stmt.go:78] E2S1S1S1] Close
I0523 17:31:41.762366 97708 rset.go:57] E2S1S1S1R0] close
I0523 17:31:41.763365 97708 srv.go:63] E2S1] Close
I0523 17:31:41.763365 97708 env.go:68] E2] Close
To use the log15 package:
import (
"gopkg.in/rana/ora.v4"
"gopkg.in/rana/ora.v4/lg15"
)
func main() {
// use the optional log15 package for ora logging
cfg := ora.Cfg()
cfg.Log.Logger = lg15.Log
ora.SetCfg(cfg)
}
which produces a sample log of:
t=2015-05-23T17:08:32-0700 lvl=info msg="OpenEnv 1" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="OpenEnv 2" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2] OpenSrv (dbname orcl)" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2] OpenSrv (srvId 1)" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2S1] OpenSes (username test)" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2S1S1] Prep: SELECT CURRENT_TIMESTAMP FROM DUAL" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2S1S1S1R0] open" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2S1S1] Close" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2S1S1S1] Close" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2S1S1S1R0] close" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2S1] Close" lib=ora
t=2015-05-23T17:08:32-0700 lvl=info msg="E2] Close" lib=ora
See https://github.com/rana/ora/tree/master/samples/lg15/main.go for sample code which uses the log15 package.
Tests are available and require some setup. Setup varies depending on whether the Oracle server is configured as a container database or non-container database. It's simpler to setup a non-container database. An example for each setup is explained.
Non-container test database setup steps:
// 1. login to an Oracle server with SqlPlus as sysdba:
SQLPLUS / AS SYSDBA
// 2. create a file for the test database use
CREATE TABLESPACE test_ts NOLOGGING DATAFILE 'test.dat' SIZE 100M AUTOEXTEND ON;
// 3. create a test database
CREATE USER test IDENTIFIED BY test DEFAULT TABLESPACE test_ts;
// 4. grant permissions to the database
GRANT CREATE SESSION, CREATE TABLE, CREATE SEQUENCE,
CREATE PROCEDURE, UNLIMITED TABLESPACE TO test;
// 5. increase the number allowable open cursors
ALTER SYSTEM SET OPEN_CURSORS = 400 SCOPE=BOTH;
// 6. create OS environment variables
// specify your_database_name; varies based on installation; may be 'orcl'
GO_ORA_DRV_TEST_DB = your_database_name
GO_ORA_DRV_TEST_USERNAME = test
GO_ORA_DRV_TEST_PASSWORD = test
Container test database setup steps:
// 1. login to an Oracle server with SqlPlus as sysdba:
SQLPLUS / AS SYSDBA
// 2. create a test pluggable database and permissions
// you will need to change the FILE_NAME_CONVERT file paths for your database installation
CREATE PLUGGABLE DATABASE go_driver_test
ADMIN USER test IDENTIFIED BY test
ROLES = (DBA)
FILE_NAME_CONVERT = ('d:\oracle\data\orcl\pdbseed\', 'd:\oracle\data\go_driver_test\');
// 3. modify the pluggable database settings
ALTER PLUGGABLE DATABASE go_driver_test OPEN;
ALTER SESSION SET CONTAINER = go_driver_test;
GRANT DBA TO test;
// 4. add new database service to the tnsnames.ora file:
// located on your client machine in $ORACLE_HOME\network\admin\tnsnames.ora
GO_DRIVER_TEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = go_driver_test)
)
)
// 5. create OS environment variables
GO_ORA_DRIVER_TEST_DB = go_driver_test
GO_ORA_DRIVER_TEST_USERNAME = test
GO_ORA_DRIVER_TEST_PASSWORD = test
Some helpful SQL maintenance statements:
// delete all tables in a non-container database
BEGIN
FOR c IN (SELECT table_name FROM user_tables) LOOP
EXECUTE IMMEDIATE ('DROP TABLE "' || c.table_name || '" CASCADE CONSTRAINTS');
END LOOP;
END;
// delete the non-container test database; use SqlPlus as sysdba
DROP USER test CASCADE;
Run the tests.
database/sql method Stmt.QueryRow is not supported.
Go 1.6 introduced stricter cgo (call C from Go) rules, and introduced runtime checks. This is good, as the possibility of C code corrupting Go code is almost completely eliminated, but it also means a severe call overhead grow. Sometimes this can be 22x the go 1.5.3 call time!
So if you need performance more than correctness, start your programs with "GODEBUG=cgocheck=0" environment setting.
Copyright 2017 Rana Ian, Tamás Gulácsi. All rights reserved. Use of this source code is governed by The MIT License found in the accompanying LICENSE file.
const (
// The driver name registered with the database/sql package.
Name string = "ora"
// The driver version sent to an Oracle server and visible in
// V$SESSION_CONNECT_INFO or GV$SESSION_CONNECT_INFO.
Version string = "v4.1.13"
)
const (
NoPool = PoolType(0)
DRCPool = PoolType(1)
SPool = PoolType(2)
CPool = PoolType(3)
)
const (
DefaultPoolSize = 4
DefaultEvictDuration = time.Minute
)
const (
MaxFetchLen = 1024
DefaultFetchLen = 128
DefaultLOBFetchLen = 8
)
const (
// SysDefault is the default, normal session mode.
SysDefault = SessionMode(iota)
// SysDba is for connecting as SYSDBA.
SysDba
// SysOper is for connectiong as SYSOPER.
SysOper
)
var Schema string
Schema may optionally be specified to prefix a table name in the sql generated by the ora.Ins, ora.Upd, ora.Del, and ora.Sel methods.
func AddTbl(v interface{}, tblName string) (err error)
AddTbl maps a table name to a struct type when a struct type name is not identitcal to an Oracle table name.
AddTbl is optional and used by the orm-like methods ora.Ins, ora.Upd, ora.Del, and ora.Sel.
AddTbl may be called once during the lifetime of the driver.
func Del(v interface{}, ses *Ses) (err error)
Del deletes a struct from an Oracle table returning a possible error.
Specify a struct, or struct pointer to parameter 'v' and an open Ses to parameter 'ses'.
Del requires one struct field tagged with db:"pk". The field tagged with
db:"pk" is used in a sql WHERE clause.
By default, Del generates and executes a sql DELETE statement based on the
struct name and one exported field name tagged with db:"pk". A struct name is
used for the table name and a field name is used for a column name. Prior to
calling Del, you may specify an alternative table name to ora.AddTbl. An
alternative column name may be specified to the field tag db:"column_name".
Set ora.Schema to specify an optional table name prefix.
func DescribeQuery(db *sql.DB, qry string) ([]DescribedColumn, error)
DescribeQuery parses the query and returns the column types, as DBMS_SQL.describe_column does.
func GctName(gct GoColumnType) string
func GetCompileErrors(ses *Ses, all bool) ([]CompileError, error)
GetCompileErrors returns the slice of the errors in user_errors.
If all is false, only errors are returned; otherwise, warnings, too.
func Ins(v interface{}, ses *Ses) (err error)
Ins inserts a struct into an Oracle table returning a possible error.
Specify a struct, or struct pointer to parameter 'v' and an open Ses to parameter 'ses'.
Optional struct field tags db:"column_name,id,-" may be specified to control
how the sql INSERT statement is generated.
By default, Ins generates and executes a sql INSERT statement based on the
struct name and all exported field names. A struct name is used for the table
name and a field name is used for a column name. Prior to calling Ins, you may
specify an alternative table name to ora.AddTbl. An alternative column name may
be specified to the field tag db:"column_name". Specifying the db:"-" tag
will remove a field from the INSERT statement.
The optional db:"id" field tag may combined with the db:"pk" tag. A field
tagged with db:"pk,id" indicates a field is a primary key backed by an Oracle
identity sequence. db:"pk,id" may be tagged to one field per struct. When
db:"pk,id" is tagged to a field Ins generates a RETURNING clause to recevie a
db generated identity value. The db:"id" tag is not required and Ins will
insert a struct to a table without returning an identity value.
Set ora.Schema to specify an optional table name prefix.
func NumEnv() int
NumEnv returns the number of open Oracle environments.
func Register(cfg DrvCfg)
Register used to register the ora database driver with the database/sql package, but this is automatic now - so this function is deprecated, has the same effect as SetCfg.
func Sel(v interface{}, rt ResType, ses *Ses, where string, whereParams ...interface{}) (result interface{}, err error)
Sel selects structs from an Oracle table returning a specified container of structs and a possible error.
Specify a struct, or struct pointer to parameter 'v' to indicate the struct return type. Specify a ResType to parameter 'rt' to indicate the container return type. Possible container return types include a slice of structs, slice of struct pointers, map of structs, and map of struct pointers. Specify an open Ses to parameter 'ses'. Optionally specify a where clause to parameter 'where' and where parameters to variadic parameter 'whereParams'.
Optional struct field tags db:"column_name,omit" may be specified to control
how the sql SELECT statement is generated. Optional struct field tags
db:"pk,fk1,fk2,fk3,fk4" control how a map return type is generated.
A slice may be returned by specifying one of the 'SliceOf' ResTypes to parameter 'rt'. Specify a SliceOfPtr to return a slice of struct pointers. Specify a SliceOfVal to return a slice of structs.
A map may be returned by specifying one of the 'MapOf' ResTypes to parameter
'rt'. The map key type is based on a struct field type tagged with one of
db:"pk", db:"fk1", db:"fk2", db:"fk3", or db:"fk4" matching the
specified ResType suffix Pk, Fk1, Fk2, Fk3, or Fk4. The map value type is a
struct pointer when a 'MapOfPtr' ResType is specified. The map value type is a
struct when a 'MapOfVal' ResType is specified. For example, tagging a uint64
struct field with db:"pk" and specifying a MapOfPtrPk generates a map with a
key type of uint64 and a value type of struct pointer.
ResTypes available to specify to parameter 'rt' are MapOfPtrPk, MapOfPtrFk1, MapOfPtrFk2, MapOfPtrFk3, MapOfPtrFk4, MapOfValPk, MapOfValFk1, MapOfValFk2, MapOfValFk3, and MapOfValFk4.
Set ora.Schema to specify an optional table name prefix.
func SetCfg(cfg DrvCfg)
SetCfg applies the specified cfg to the ora database driver.
func SplitDSN(dsn string) (username, password, sid string)
SplitDSN splits the user/password@dblink string to username, password and dblink, to be used as SesCfg.Username, SesCfg.Password, SrvCfg.Dblink.
func Upd(v interface{}, ses *Ses) (err error)
Upd updates a struct to an Oracle table returning a possible error.
Specify a struct, or struct pointer to parameter 'v' and an open Ses to parameter 'ses'.
Upd requires one struct field tagged with db:"pk". The field tagged with
db:"pk" is used in a sql WHERE clause. Optional struct field tags
db:"column_name,-" may be specified to control how the sql UPDATE statement is
generated.
By default, Upd generates and executes a sql UPDATE statement based on the
struct name and all exported field names. A struct name is used for the table
name and a field name is used for a column name. Prior to calling Upd, you may
specify an alternative table name to ora.AddTbl. An alternative column name may
be specified to the field tag db:"column_name". Specifying the db:"-" tag
will remove a field from the UPDATE statement.
Set ora.Schema to specify an optional table name prefix.
func WithStmtCfg(ctx context.Context, cfg StmtCfg) context.Context
WithStmtCfg returns a new context, with the given cfg that can be used to configure several parameters.
WARNING: the StmtCfg must be derived from Cfg(), or NewStmtCfg(), as an empty StmtCfg is not usable!
type Bfile struct {
IsNull bool
DirectoryAlias string
Filename string
}
Bfile represents a nullable BFILE Oracle value.
func (this Bfile) Equals(other Bfile) bool
Equals returns true when the receiver and specified Bfile are both null, or when the receiver and specified Bfile are both not null, DirectoryAlias are equal and Filename are equal.
type Bool struct {
IsNull bool
Value bool
}
Bool is a nullable bool.
func (this Bool) Equals(other Bool) bool
Equals returns true when the receiver and specified Bool are both null, or when the receiver and specified Bool are both not null and Values are equal.
func (this Bool) MarshalJSON() ([]byte, error)
func (this *Bool) UnmarshalJSON(p []byte) error
type Column struct {
Name string
Type C.ub2
Length uint32
Precision C.sb2
Scale C.sb1
}
type CompileError struct {
Owner, Name, Type string
Line, Position, Code int64
Text string
Warning bool
}
CompileError represents a compile-time error as in user_errors view.
func (ce CompileError) Error() string
type Con struct {
}
Con is an Oracle connection associated with a server and session.
Implements the driver.Conn interface.
func (con *Con) Begin() (driver.Tx, error)
Begin starts a transaction.
Begin is a member of the driver.Conn interface.
func (con *Con) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error)
BeginTx starts and returns a new transaction. The provided context should be used to roll the transaction back if it is cancelled.
If the driver does not support setting the isolation level and one is set or if there is a set isolation level but the set level is not supported, an error must be returned.
If the read-only value is true to either set the read-only transaction property if supported or return an error if it is not supported.
func (con *Con) Close() (err error)
Close ends a session and disconnects from an Oracle server.
Close is a member of the driver.Conn interface.
func (con *Con) IsOpen() bool
IsOpen returns true when the connection to the Oracle server is open; otherwise, false.
Calling Close will cause IsOpen to return false. Once closed, a connection cannot be re-opened. To open a new connection call Open on a driver.
func (s *Con) Name(calc func() string) string
Name sets the name to the result of calc once, then returns that result forever. (Effectively caches the result of calc().)
func (con *Con) Ping(ctx context.Context) error
Ping makes a round-trip call to an Oracle server to confirm that the connection is active.
func (con *Con) Prepare(query string) (driver.Stmt, error)
Prepare readies a sql string for use.
Prepare is a member of the driver.Conn interface.
func (con *Con) PrepareContext(ctx context.Context, query string) (driver.Stmt, error)
PrepareContext returns a prepared statement, bound to this connection. context is for the preparation of the statement, it must not store the context within the statement itself.
type Date struct {
date.Date
}
Date is a nullable date, for low (second) precisions (OCIDate)
type DescribedColumn struct {
Column
Schema string
Nullable bool
CharsetID, CharsetForm int
}
DescribedColumn type for describing a column (see DescribeQuery).
type Drv struct {
sync.RWMutex
}
Drv represents an Oracle database driver.
Drv is not meant to be called by user-code.
Drv implements the driver.Driver interface.
func (drv *Drv) Cfg() DrvCfg
func (drv *Drv) Open(conStr string) (driver.Conn, error)
Open opens a connection to an Oracle server with the database/sql environment.
This is intended to be called by the database/sql package only.
Alternatively, you may call Env.OpenCon to create an *ora.Con.
Open is a member of the driver.Driver interface.
func (drv *Drv) SetCfg(cfg DrvCfg)
type DrvCfg struct {
StmtCfg
Log LogDrvCfg
}
DrvCfg represents configuration values for the ora package.
func Cfg() DrvCfg
Cfg returns the ora database driver's cfg.
func NewDrvCfg() DrvCfg
NewDrvCfg creates a DrvCfg with default values.
func (c DrvCfg) SetBinaryDouble(gct GoColumnType) DrvCfg
func (c DrvCfg) SetBinaryFloat(gct GoColumnType) DrvCfg
func (c DrvCfg) SetBlob(gct GoColumnType) DrvCfg
func (c DrvCfg) SetByteSlice(gct GoColumnType) DrvCfg
func (c DrvCfg) SetChar(gct GoColumnType) DrvCfg
func (c DrvCfg) SetChar1(gct GoColumnType) DrvCfg
func (c DrvCfg) SetClob(gct GoColumnType) DrvCfg
func (c DrvCfg) SetDate(gct GoColumnType) DrvCfg
func (c DrvCfg) SetFloat(gct GoColumnType) DrvCfg
func (c DrvCfg) SetLobBufferSize(size int) DrvCfg
func (c DrvCfg) SetLogger(lgr Logger) DrvCfg
func (c DrvCfg) SetLong(gct GoColumnType) DrvCfg
func (c DrvCfg) SetLongBufferSize(size uint32) DrvCfg
func (c DrvCfg) SetLongRaw(gct GoColumnType) DrvCfg
func (c DrvCfg) SetLongRawBufferSize(size uint32) DrvCfg
func (c DrvCfg) SetNumberBigFloat(gct GoColumnType) DrvCfg
func (c DrvCfg) SetNumberBigInt(gct GoColumnType) DrvCfg
func (c DrvCfg) SetNumberFloat(gct GoColumnType) DrvCfg
func (c DrvCfg) SetNumberInt(gct GoColumnType) DrvCfg
func (c DrvCfg) SetPrefetchMemorySize(prefetchMemorySize uint32) DrvCfg
func (c DrvCfg) SetPrefetchRowCount(prefetchRowCount uint32) DrvCfg
func (c DrvCfg) SetRaw(gct GoColumnType) DrvCfg
func (cfg DrvCfg) SetStmtCfg(stmtCfg StmtCfg) DrvCfg
func (c DrvCfg) SetStringPtrBufferSize(size int) DrvCfg
func (c DrvCfg) SetTimestamp(gct GoColumnType) DrvCfg
func (c DrvCfg) SetTimestampLtz(gct GoColumnType) DrvCfg
func (c DrvCfg) SetTimestampTz(gct GoColumnType) DrvCfg
func (c DrvCfg) SetVarchar(gct GoColumnType) DrvCfg
type DrvExecResult struct {
}
DrvExecResult is an Oracle execution result.
DrvExecResult implements the driver.Result interface.
func (er *DrvExecResult) LastInsertId() (int64, error)
LastInsertId returns the identity value from an insert statement.
There are two setup steps required to reteive the LastInsertId. One, specify a 'returning into' clause in the SQL insert statement. And, two, specify a nil parameter to DB.Exec or DrvStmt.Exec.
For example:
db, err := sql.Open("ora", "scott/tiger@orcl")
db.Exec("CREATE TABLE T1 (C1 NUMBER(19,0) GENERATED ALWAYS AS IDENTITY (START WITH 1 INCREMENT BY 1), C2 VARCHAR2(48 CHAR))")
result, err := db.Exec("INSERT INTO T1 (C2) VALUES ('GO') RETURNING C1 /*lastInsertId*/ INTO :C1", nil)
id, err := result.LastInsertId()
func (er *DrvExecResult) RowsAffected() (int64, error)
RowsAffected returns the number of rows affected by the exec statement.
type DrvQueryResult struct {
}
DrvQueryResult contains methods to retrieve the results of a SQL select statement.
DrvQueryResult implements the driver.Rows interface.
func (qr *DrvQueryResult) Close() error
Close performs no operations.
Close is a member of the driver.Rows interface.
func (qr *DrvQueryResult) ColumnTypeDatabaseTypeName(index int) string
ColumnTypeDatabaseTypeName returns the database system type name without the length, in uppercase.
func (qr *DrvQueryResult) ColumnTypeLength(index int) (length int64, ok bool)
ColumnTypeLength returns the length of the column type if the column is a variable length type. If the column is not a variable length type ok should return false. If length is not limited other than system limits, it should return math.MaxInt64.
func (qr *DrvQueryResult) ColumnTypeNullable(index int) (nullable, ok bool)
ColumnTypeNullable returns true if it is known the column may be null, or false if the column is known to be not nullable. If the column nullability is unknown, ok should be false.
func (qr *DrvQueryResult) ColumnTypePrecisionScale(index int) (precision, scale int64, ok bool)
ColumnTypePrecisionScale return the precision and scale for decimal types. If not applicable, ok should be false.
func (qr *DrvQueryResult) ColumnTypeScanType(index int) reflect.Type
func (qr *DrvQueryResult) Columns() []string
Columns returns query column names.
Columns is a member of the driver.Rows interface.
func (qr *DrvQueryResult) HasNextResultSet() bool
HasNextResultSet reports whether there is another result set after the current one.
func (qr *DrvQueryResult) Next(dest []driver.Value) (err error)
Next populates the specified slice with the next row of data.
Returns io.EOF when there are no more rows.
Next is a member of the driver.Rows interface.
func (qr *DrvQueryResult) NextResultSet() error
NextResultSet advances the driver to the next result set even if there are remaining rows in the current result set.
type DrvStmt struct {
}
DrvStmt is an Oracle statement associated with a session.
DrvStmt wraps Stmt and is intended for use by the database/sql/driver package.
DrvStmt implements the driver.Stmt interface.
func (ds *DrvStmt) Close() error
Close closes the SQL statement.
Close is a member of the driver.Stmt interface.
func (ds *DrvStmt) Exec(values []driver.Value) (driver.Result, error)
Exec executes an Oracle SQL statement on a server. Exec returns a driver.Result and a possible error.
Exec is a member of the driver.Stmt interface.
func (ds *DrvStmt) ExecContext(ctx context.Context, values []driver.NamedValue) (driver.Result, error)
ExecContext enhances the Stmt interface by providing Exec with context. ExecContext must honor the context timeout and return when it is cancelled.
func (ds *DrvStmt) NumInput() int
NumInput returns the number of placeholders in a sql statement.
NumInput is a member of the driver.Stmt interface.
func (ds *DrvStmt) Query(values []driver.Value) (driver.Rows, error)
Query runs a SQL query on an Oracle server. Query returns driver.Rows and a possible error.
Query is a member of the driver.Stmt interface.
func (ds *DrvStmt) QueryContext(ctx context.Context, values []driver.NamedValue) (driver.Rows, error)
QueryContext enhances the Stmt interface by providing Query with context. QueryContext must honor the context timeout and return when it is cancelled.
type EmpLgr struct{}
func (e EmpLgr) Errorf(format string, v ...interface{})
func (e EmpLgr) Errorln(v ...interface{})
func (e EmpLgr) Infof(format string, v ...interface{})
func (e EmpLgr) Infoln(v ...interface{})
type Env struct {
sync.RWMutex
}
Env represents an Oracle environment.
func NewEnvSrvSes(dsn string) (*Env, *Srv, *Ses, error)
NewEnvSrvSes is a comfort function which opens the environment, creates a connection (Srv) to the server, and opens a session (Ses), in one call.
Ideal for simple use cases.
func OpenEnv() (env *Env, err error)
OpenEnv opens an Oracle environment.
Optionally specify a cfg parameter. If cfg is nil, default cfg values are applied.
func (env *Env) Cfg() StmtCfg
func (env *Env) Close() (err error)
Close disconnects from servers and resets optional fields.
func (env *Env) IsOpen() bool
IsOpen returns true when the environment is open; otherwise, false.
Calling Close will cause IsOpen to return false. Once closed, the environment may be re-opened by calling Open.
func (s *Env) Name(calc func() string) string
Name sets the name to the result of calc once, then returns that result forever. (Effectively caches the result of calc().)
func (env *Env) NewPool(srvCfg SrvCfg, sesCfg SesCfg, size int) *Pool
NewPool returns an idle session pool, which evicts the idle sessions every minute, and automatically manages the required new connections (Srv).
This is done by maintaining a 1-1 pairing between the Srv and its Ses.
This pool does NOT limit the number of active connections, just helps reuse already established connections and sessions, lowering the resource usage on the server.
If size <= 0, then DefaultPoolSize is used.
func (env *Env) NewSrvPool(srvCfg SrvCfg, size int) *SrvPool
NewSrvPool returns a connection pool, which evicts the idle connections in every minute. The pool holds at most size idle Srv. If size is zero, DefaultPoolSize will be used.
func (env *Env) NumCon() int
NumCon returns the number of open Oracle connections.
func (env *Env) NumSrv() int
NumSrv returns the number of open Oracle servers.
func (env *Env) OCINumberFromFloat(dest *C.OCINumber, value float64, byteLen int) error
func (env *Env) OCINumberFromInt(dest *C.OCINumber, value int64, byteLen int) error
func (env *Env) OCINumberFromUint(dest *C.OCINumber, value uint64, byteLen int) error
func (env *Env) OCINumberToFloat(src *C.OCINumber, byteLen int) (float64, error)
func (env *Env) OCINumberToInt(src *C.OCINumber, byteLen int) (int64, error)
func (env *Env) OCINumberToUint(src *C.OCINumber, byteLen int) (uint64, error)
func (env *Env) OpenCon(dsn string) (con *Con, err error)
OpenCon starts an Oracle session on a server returning a *Con and possible error.
The connection string has the form username/password@dblink e.g., scott/tiger@orcl For connecting as SYSDBA or SYSOPER, append " AS SYSDBA" to the end of the connection string: "sys/sys as sysdba".
dblink is a connection identifier such as a net service name, full connection identifier, or a simple connection identifier. The dblink may be defined in the client machine's tnsnames.ora file.
func (env *Env) OpenSrv(cfg SrvCfg) (srv *Srv, err error)
OpenSrv connects to an Oracle server returning a *Srv and possible error.
func (env *Env) SetCfg(cfg StmtCfg)
type Float32 struct {
IsNull bool
Value float32
}
Float32 is a nullable float32.
func (this Float32) Equals(other Float32) bool
Equals returns true when the receiver and specified Float32 are both null, or when the receiver and specified Float32 are both not null and Values are equal.
func (this Float32) MarshalJSON() ([]byte, error)
func (this *Float32) UnmarshalJSON(p []byte) error
type Float64 struct {
IsNull bool
Value float64
}
Float64 is a nullable float64.
func (this Float64) Equals(other Float64) bool
Equals returns true when the receiver and specified Float64 are both null, or when the receiver and specified Float64 are both not null and Values are equal.
func (this Float64) MarshalJSON() ([]byte, error)
func (this *Float64) UnmarshalJSON(p []byte) error
type GoColumnType uint
GoColumnType defines the Go type returned from a sql select column.
const (
// D defines a sql select column based on its default mapping.
D GoColumnType = iota + 1
// I64 defines a sql select column as a Go int64.
I64
// I32 defines a sql select column as a Go int32.
I32
// I16 defines a sql select column as a Go int16.
I16
// I8 defines a sql select column as a Go int8.
I8
// U64 defines a sql select column as a Go uint64.
U64
// U32 defines a sql select column as a Go uint32.
U32
// U16 defines a sql select column as a Go uint16.
U16
// U8 defines a sql select column as a Go uint8.
U8
// F64 defines a sql select column as a Go float64.
F64
// F32 defines a sql select column as a Go float32.
F32
// OraI64 defines a sql select column as a nullable Go ora.Int64.
OraI64
// OraI32 defines a sql select column as a nullable Go ora.Int32.
OraI32
// OraI16 defines a sql select column as a nullable Go ora.Int16.
OraI16
// OraI8 defines a sql select column as a nullable Go ora.Int8.
OraI8
// OraU64 defines a sql select column as a nullable Go ora.Uint64.
OraU64
// OraU32 defines a sql select column as a nullable Go ora.Uint32.
OraU32
// OraU16 defines a sql select column as a nullable Go ora.Uint16.
OraU16
// OraU8 defines a sql select column as a nullable Go ora.Uint8.
OraU8
// OraF64 defines a sql select column as a nullable Go ora.Float64.
OraF64
// OraF32 defines a sql select column as a nullable Go ora.Float32.
OraF32
// T defines a sql select column as a Go time.Time.
T
// OraT defines a sql select column as a nullable Go ora.Time.
OraT
// S defines a sql select column as a Go string.
S
// OraS defines a sql select column as a nullable Go ora.String.
OraS
// B defines a sql select column as a Go bool.
B
// OraB defines a sql select column as a nullable Go ora.Bool.
OraB
// Bin defines a sql select column or bind parmeter as a Go byte slice.
Bin
// OraBin defines a sql select column as a nullable Go ora.Binary.
OraBin
// N defines a sql select column as a Go string for number.
N
// OraN defines a sql select column as a nullable Go string for number.
OraN
// L defins an sql select column as an ora.Lob.
L
)
go column types
func (gct GoColumnType) String() string
type Id struct {
}
type Int16 struct {
IsNull bool
Value int16
}
Int16 is a nullable int16.
func (this Int16) Equals(other Int16) bool
Equals returns true when the receiver and specified Int16 are both null, or when the receiver and specified Int16 are both not null and Values are equal.
func (this Int16) MarshalJSON() ([]byte, error)
func (this *Int16) UnmarshalJSON(p []byte) error
type Int32 struct {
IsNull bool
Value int32
}
Int32 is a nullable int32.
func (this Int32) Equals(other Int32) bool
Equals returns true when the receiver and specified Int32 are both null, or when the receiver and specified Int32 are both not null and Values are equal.
func (this Int32) MarshalJSON() ([]byte, error)
func (this *Int32) UnmarshalJSON(p []byte) error
type Int64 struct {
IsNull bool
Value int64
}
Int64 is a nullable int64.
func (this Int64) Equals(other Int64) bool
Equals returns true when the receiver and specified Int64 are both null, or when the receiver and specified Int64 are both not null and Values are equal.
func (this Int64) MarshalJSON() ([]byte, error)
func (this *Int64) UnmarshalJSON(p []byte) error
type Int8 struct {
IsNull bool
Value int8
}
Int8 is a nullable int8.
func (this Int8) Equals(other Int8) bool
Equals returns true when the receiver and specified Int8 are both null, or when the receiver and specified Int8 are both not null and Values are equal.
func (this Int8) MarshalJSON() ([]byte, error)
func (this *Int8) UnmarshalJSON(p []byte) error
type IntervalDS struct {
IsNull bool
Day int32
Hour int32
Minute int32
Second int32
Nanosecond int32
}
IntervalDS represents a nullable INTERVAL DAY TO SECOND Oracle value.
func (this IntervalDS) Equals(other IntervalDS) bool
Equals returns true when the receiver and specified IntervalDS are both null, or when the receiver and specified IntervalDS are both not null, and all other fields are equal.
func (this IntervalDS) ShiftTime(t time.Time) time.Time
ShiftTime returns a new Time with IntervalDS applied.
func (this IntervalDS) String() string
type IntervalYM struct {
IsNull bool
Year int32
Month int32
}
IntervalYM represents a nullable INTERVAL YEAR TO MONTH Oracle value.
func (this IntervalYM) Equals(other IntervalYM) bool
Equals returns true when the receiver and specified IntervalYM are both null, or when the receiver and specified IntervalYM are both not null, Year are equal and Month are equal.
func (this IntervalYM) ShiftTime(t time.Time) time.Time
ShiftTime returns a new Time with IntervalYM applied.
func (this IntervalYM) String() string
type Lob struct {
io.Reader
io.Closer
C bool
}
Lob Reader is sent to the DB on bind, if not nil. The Reader can read the LOB if we bind a *Lob, Closer will close the LOB. Set Lob.C = true to make this a CLOB reader!
func (this *Lob) Bytes() ([]byte, error)
Bytes will read the contents of the Lob.Reader, and will keep that for future.
func (this *Lob) Close() error
func (this *Lob) Equals(other Lob) bool
Equals returns true when the receiver and specified Lob are both null, or when they both not null and share the same Reader.
func (this *Lob) MarshalJSON() ([]byte, error)
func (this *Lob) Read(p []byte) (int, error)
func (this *Lob) Scan(src interface{}) error
func (this *Lob) String() string
func (this *Lob) UnmarshalJSON(p []byte) error
func (this *Lob) Value() (driver.Value, error)
Value returns what Lob.Bytes returns.
type LogConCfg struct {
// Close determines whether the Con.Close method is logged.
//
// The default is true.
Close bool
// Prepare determines whether the Con.Prepare method is logged.
//
// The default is true.
Prepare bool
// Begin determines whether the Con.Begin method is logged.
//
// The default is true.
Begin bool
// Ping determines whether the Con.Ping method is logged.
//
// The default is true.
Ping bool
}
LogConCfg represents Con logging configuration values.
func NewLogConCfg() LogConCfg
NewLogConCfg creates a LogTxCfg with default values.
type LogDrvCfg struct {
// Logger writes log messages.
// Logger can be replaced with any type implementing the Logger interface.
//
// The default implementation uses the standard lib's log package.
//
// For a glog-based implementation, see gopkg.in/rana/ora.v4/glg.
// LogDrvCfg.Logger = glg.Log
//
// For an gopkg.in/inconshreveable/log15.v2-based, see gopkg.in/rana/ora.v4/lg15.
// LogDrvCfg.Logger = lg15.Log
Logger Logger
// OpenEnv determines whether the ora.OpenEnv method is logged.
//
// The default is true.
OpenEnv bool
// Ins determines whether the ora.Ins method is logged.
//
// The default is true.
Ins bool
// Upd determines whether the ora.Upd method is logged.
//
// The default is true.
Upd bool
// Del determines whether the ora.Del method is logged.
//
// The default is true.
Del bool
// Sel determines whether the ora.Sel method is logged.
//
// The default is true.
Sel bool
// AddTbl determines whether the ora.AddTbl method is logged.
//
// The default is true.
AddTbl bool
Env LogEnvCfg
Srv LogSrvCfg
Ses LogSesCfg
Stmt LogStmtCfg
Tx LogTxCfg
Con LogConCfg
Rset LogRsetCfg
}
LogDrvCfg represents package-level logging configuration values.
func NewLogDrvCfg() LogDrvCfg
NewLogDrvCfg creates a LogDrvCfg with default values.
func (c LogDrvCfg) IsEnabled(enabled bool) bool
IsEnabled returns whether the logger is enabled (and enabled is true).
type LogEnvCfg struct {
// Close determines whether the Env.Close method is logged.
//
// The default is true.
Close bool
// OpenSrv determines whether the Env.OpenSrv method is logged.
//
// The default is true.
OpenSrv bool
// OpenCon determines whether the Env.OpenCon method is logged.
//
// The default is true.
OpenCon bool
}
LogEnvCfg represents Env logging configuration values.
func NewLogEnvCfg() LogEnvCfg
NewLogEnvCfg creates a LogEnvCfg with default values.
type LogRsetCfg struct {
// Close determines whether the Rset.close method is logged.
//
// The default is true.
Close bool
// BeginRow determines whether the Rset.beginRow method is logged.
//
// The default is false.
BeginRow bool
// EndRow determines whether the Rset.endRow method is logged.
//
// The default is false.
EndRow bool
// Next determines whether the Rset.Next method is logged.
//
// The default is false.
Next bool
// Open determines whether the Rset.open method is logged.
//
// The default is true.
Open bool
// OpenDefs determines whether Select-list definitions with the Rset.open method are logged.
//
// The default is true.
OpenDefs bool
}
LogRsetCfg represents Rset logging configuration values.
func NewLogRsetCfg() LogRsetCfg
NewLogTxCfg creates a LogRsetCfg with default values.
type LogSesCfg struct {
// Close determines whether the Ses.Close method is logged.
//
// The default is true.
Close bool
// PrepAndExe determines whether the Ses.PrepAndExe method is logged.
//
// The default is true.
PrepAndExe bool
// PrepAndQry determines whether the Ses.PrepAndQry method is logged.
//
// The default is true.
PrepAndQry bool
// Prep determines whether the Ses.Prep method is logged.
//
// The default is true.
Prep bool
// Ins determines whether the Ses.Ins method is logged.
//
// The default is true.
Ins bool
// Upd determines whether the Ses.Upd method is logged.
//
// The default is true.
Upd bool
// Sel determines whether the Ses.Sel method is logged.
//
// The default is true.
Sel bool
// StartTx determines whether the Ses.StartTx method is logged.
//
// The default is true.
StartTx bool
// Ping determines whether the Ses.Ping method is logged.
//
// The default is true.
Ping bool
// Break determines whether the Ses.Break method is logged.
//
// The default is true.
Break bool
}
LogSesCfg represents Ses logging configuration values.
func NewLogSesCfg() LogSesCfg
NewLogSesCfg creates a LogSesCfg with default values.
type LogSrvCfg struct {
// Close determines whether the Srv.Close method is logged.
//
// The default is true.
Close bool
// OpenSes determines whether the Srv.OpenSes method is logged.
//
// The default is true.
OpenSes bool
// Version determines whether the Srv.Version method is logged.
//
// The default is true.
Version bool
}
LogSrvCfg represents Srv logging configuration values.
func NewLogSrvCfg() LogSrvCfg
NewLogSrvCfg creates a LogSrvCfg with default values.
type LogStmtCfg struct {
// Close determines whether the Stmt.Close method is logged.
//
// The default is true.
Close bool
// Exe determines whether the Stmt.Exe method is logged.
//
// The default is true.
Exe bool
// Qry determines whether the Stmt.Qry method is logged.
//
// The default is true.
Qry bool
// Bind determines whether the Stmt.bind method is logged.
//
// The default is true.
Bind bool
}
LogStmtCfg represents Stmt logging configuration values.
func NewLogStmtCfg() LogStmtCfg
NewLogStmtCfg creates a LogStmtCfg with default values.
type LogTxCfg struct {
// Commit determines whether the Tx.Commit method is logged.
//
// The default is true.
Commit bool
// Rollback determines whether the Tx.Rollback method is logged.
//
// The default is true.
Rollback bool
}
LogTxCfg represents Tx logging configuration values.
func NewLogTxCfg() LogTxCfg
NewLogTxCfg creates a LogTxCfg with default values.
type Logger interface {
Infof(format string, args ...interface{})
Infoln(args ...interface{})
Errorf(format string, args ...interface{})
Errorln(args ...interface{})
}
Logger interface is for logging.
type MultiErr struct {
}
MultiErr holds multiple errors in a single string.
func (m MultiErr) Error() string
Error returns one or more errors.
Error is a member of the 'error' interface.
type Num string
type OCINum struct {
num.OCINum
}
func (num *OCINum) FromC(x C.OCINumber)
FromC converts from the given C.OCINumber.
func (n OCINum) String() string
func (num OCINum) ToC(x *C.OCINumber)
ToC converts the OCINum into the given *C.OCINumber.
func (n OCINum) Value() (driver.Value, error)
Value returns the driver.Value as required by database/sql. So OCINum is allowed as a parameter to Scan.
type ORAError struct {
}
func (e ORAError) Code() int
func (e *ORAError) Error() string
type OraNum struct {
IsNull bool
Value string
}
func (this OraNum) Equals(other OraNum) bool
Equals returns true when the receiver and specified OraNum are both null, or when the receiver and specified OraNum are both not null and Values are equal.
func (this OraNum) MarshalJSON() ([]byte, error)
func (this OraNum) String() string
func (this *OraNum) UnmarshalJSON(p []byte) error
type OraOCINum struct {
IsNull bool
Value num.OCINum
}
func (this OraOCINum) Equals(other OraOCINum) bool
Equals returns true when the receiver and specified OraOCINum are both null, or when the receiver and specified OraOCINum are both not null and Values are equal.
func (this OraOCINum) MarshalJSON() ([]byte, error)
func (this OraOCINum) String() string
func (this *OraOCINum) UnmarshalJSON(p []byte) error
type Pool struct {
sync.Mutex
}
func NewPool(dsn string, size int) (*Pool, error)
NewPool returns a new session pool with default config.
func (p *Pool) Close() (err error)
Close all idle sessions and connections.
func (p *Pool) Get() (ses *Ses, err error)
Get a session - either an idle session, or if such does not exist, then a new session on an idle connection; if such does not exist, then a new session on a new connection.
func (p *Pool) Put(ses *Ses)
Put the session back to the session pool. Ensure that on ses Close (eviction), srv is put back on the idle pool.
func (p Pool) SetEvictDuration(dur time.Duration)
Set the eviction duration to the given. Also starts eviction if not yet started.
type PoolCfg struct {
Type PoolType
Name string
Username string
Password string
Min, Max, Incr uint32
}
func DSNPool(str string) PoolCfg
DSNPool returns the Pool config from dsn.
type PoolType uint8
type Raw struct {
IsNull bool
Value []byte
}
Raw represents a nullable byte slice for RAW or LONG RAW Oracle values.
func (this Raw) Equals(other Raw) bool
Equals returns true when the receiver and specified Raw are both null, or when the receiver and specified Raw are both not null and Values are equal.
func (this Raw) MarshalJSON() ([]byte, error)
func (this *Raw) UnmarshalJSON(p []byte) error
type ResType int
ResType represents a result type returned by the ora.Sel method.
const (
// SliceOfPtr indicates a slice of struct pointers will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
SliceOfPtr ResType = iota
// SliceOfVal indicates a slice of structs will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
SliceOfVal
// MapOfPtrPk indicates a map of struct pointers will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"pk"`.
MapOfPtrPk
// MapOfPtrFk1 indicates a map of struct pointers will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"fk1"`.
MapOfPtrFk1
// MapOfPtrFk2 indicates a map of struct pointers will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"fk2"`.
MapOfPtrFk2
// MapOfPtrFk3 indicates a map of struct pointers will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"fk3"`.
MapOfPtrFk3
// MapOfPtrFk4 indicates a map of struct pointers will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"fk4"`.
MapOfPtrFk4
// MapOfValPk indicates a map of structs will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"pk"`.
MapOfValPk
// MapOfValFk1 indicates a map of structs will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"fk1"`.
MapOfValFk1
// MapOfValFk2 indicates a map of structs will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"fk2"`.
MapOfValFk2
// MapOfValFk3 indicates a map of structs will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"fk3"`.
MapOfValFk3
// MapOfValFk4 indicates a map of structs will be returned by the ora.Sel method.
// The struct type is specified to ora.Sel by the user.
// The map key is determined by a struct field tagged with `db:"fk4"`.
MapOfValFk4
)
type Rset struct {
sync.RWMutex
Row []interface{}
Columns []Column
}
Rset represents a result set used to obtain Go values from a SQL select statement.
Opening and closing a Rset is managed internally. Rset doesn't have an Open method or Close method.
func (rset *Rset) Err() error
Err returns the last error of the reesult set.
func (rset *Rset) Exhaust()
Exhaust will cycle to the end of the Rset, to autoclose it.
func (rset *Rset) IsOpen() bool
IsOpen returns true when a result set is open; otherwise, false.
func (rset *Rset) Len() int
Len returns the number of rows retrieved.
func (s *Rset) Name(calc func() string) string
Name sets the name to the result of calc once, then returns that result forever. (Effectively caches the result of calc().)
func (rset *Rset) Next() bool
Next attempts to load a row of data from an Oracle buffer. True is returned when a row of data is retrieved. False is returned when no data is available.
Retrieve the loaded row from the Rset.Row field. Rset.Row is updated on each call to Next. Rset.Row is set to nil when Next returns false.
When Next returns false check Rset.Err() for any error that may have occured.
func (rset *Rset) NextRow() []interface{}
NextRow attempts to load a row from the Oracle buffer and return the row. Nil is returned when there's no data.
When NextRow returns nil check Rset.Err() for any error that may have occured.
type RsetCfg struct {
// TrueRune is rune a Go bool true value from SQL select-list character column.
//
// The is default is '1'.
TrueRune rune
// Err is the error from the last Set... method.
Err error
}
RsetCfg affects the association of Oracle select-list columns to Go types.
Though it is unlucky, an empty RsetCfg is unusable! Please use NewRsetCfg().
RsetCfg is immutable, so all Set... methods returns a new copy!
func NewRsetCfg() RsetCfg
NewRsetCfg returns a RsetCfg with default values.
func (c RsetCfg) BinaryDouble() GoColumnType
BinaryDouble returns a GoColumnType associated to an Oracle select-list BINARY_DOUBLE column.
The default is F64.
BinaryDouble is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, BinaryDouble is used.
func (c RsetCfg) BinaryFloat() GoColumnType
BinaryFloat returns a GoColumnType associated to an Oracle select-list BINARY_FLOAT column.
The default for the database/sql package is F64.
The default for the ora package is F32.
BinaryFloat is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, BinaryFloat is used.
func (c RsetCfg) Blob() GoColumnType
Blob returns a GoColumnType associated to an Oracle select-list BLOB column.
The default is Bits.
Blob is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Blob is used.
func (c RsetCfg) Char() GoColumnType
Char returns a GoColumnType associated to an Oracle select-list CHAR column and NCHAR column.
The default is S.
Char is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Char is used.
func (c RsetCfg) Char1() GoColumnType
Char1 returns a GoColumnType associated to an Oracle select-list CHAR column with length 1 and NCHAR column with length 1.
The default is B.
Char1 is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Char1 is used.
func (c RsetCfg) Clob() GoColumnType
Clob returns a GoColumnType associated to an Oracle select-list CLOB column and NCLOB column.
The default is S.
Clob is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Clob is used.
func (c RsetCfg) Date() GoColumnType
Date returns a GoColumnType associated to an Oracle select-list DATE column.
The default is T.
Date is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Date is used.
func (c RsetCfg) Float() GoColumnType
Float returns a GoColumnType associated to an Oracle select-list FLOAT column.
The default is F64.
Float is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Float is used.
func (c RsetCfg) IsZero() bool
func (c RsetCfg) Long() GoColumnType
Long returns a GoColumnType associated to an Oracle select-list LONG column.
The default is S.
Long is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Long is used.
func (c RsetCfg) LongRaw() GoColumnType
LongRaw returns a GoColumnType associated to an Oracle select-list LONG RAW column.
The default is Bits.
LongRaw is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, LongRaw is used.
func (c RsetCfg) NumberBigFloat() GoColumnType
NumberBigFloat returns a GoColumnType associated to an Oracle select-list NUMBER column defined with a scale greater than zero and precision unknown or > 15.
The default is N.
NumberBugFloat is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, NumberFloat is used.
func (c RsetCfg) NumberBigInt() GoColumnType
NumberBigInt returns a GoColumnType associated to an Oracle select-list NUMBER column defined with scale zero and precision unknown or > 19.
The default is N.
The database/sql package uses NumberBigInt.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, NumberInt is used.
func (c RsetCfg) NumberFloat() GoColumnType
NumberFloat returns a GoColumnType associated to an Oracle select-list NUMBER column defined with a scale greater than zero.
The default is F64.
NumberFloat is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, NumberFloat is used.
func (c RsetCfg) NumberInt() GoColumnType
NumberInt returns a GoColumnType associated to an Oracle select-list NUMBER column defined with scale zero and precision <= 19.
The default is I64.
The database/sql package uses NumberInt.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, NumberInt is used.
func (c RsetCfg) Raw() GoColumnType
Raw returns a GoColumnType associated to an Oracle select-list RAW column.
The default is Bits.
Raw is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Raw is used.
func (c RsetCfg) SetBinaryDouble(gct GoColumnType) RsetCfg
SetBinaryDouble sets a GoColumnType associated to an Oracle select-list BINARY_DOUBLE column.
Valid values are I64, I32, I16, I8, U64, U32, U16, U8, F64, F32, OraI64, OraI32, OraI16, OraI8, OraU64, OraU32, OraU16, OraU8, OraF64, OraF32, N, OraN.
Returns an error if a non-numeric GoColumnType is specified.
func (c RsetCfg) SetBinaryFloat(gct GoColumnType) RsetCfg
SetBinaryFloat sets a GoColumnType associated to an Oracle select-list BINARY_FLOAT column.
Valid values are I64, I32, I16, I8, U64, U32, U16, U8, F64, F32, OraI64, OraI32, OraI16, OraI8, OraU64, OraU32, OraU16, OraU8, OraF64, OraF32, Num, OraNum.
Returns an error if a non-numeric GoColumnType is specified.
func (c RsetCfg) SetBlob(gct GoColumnType) RsetCfg
SetBlob sets a GoColumnType associated to an Oracle select-list BLOB column.
Valid values are Bits and OraBits.
Returns an error if a non-string GoColumnType is specified.
func (c RsetCfg) SetChar(gct GoColumnType) RsetCfg
SetChar sets a GoColumnType associated to an Oracle select-list CHAR column and NCHAR column.
Valid values are S and OraS.
Returns an error if a non-string GoColumnType is specified.
func (c RsetCfg) SetChar1(gct GoColumnType) RsetCfg
SetChar1 sets a GoColumnType associated to an Oracle select-list CHAR column with length 1 and NCHAR column with length 1.
Valid values are B, OraB, S and OraS.
Returns an error if a non-bool or non-string GoColumnType is specified.
func (c RsetCfg) SetClob(gct GoColumnType) RsetCfg
SetClob sets a GoColumnType associated to an Oracle select-list CLOB column and NCLOB column.
Valid values are S and OraS.
Returns an error if a non-string GoColumnType is specified.
func (c RsetCfg) SetDate(gct GoColumnType) RsetCfg
SetDate sets a GoColumnType associated to an Oracle select-list DATE column.
Valid values are T and OraT.
Returns an error if a non-time GoColumnType is specified.
func (c RsetCfg) SetFloat(gct GoColumnType) RsetCfg
SetFloat sets a GoColumnType associated to an Oracle select-list FLOAT column.
Valid values are I64, I32, I16, I8, U64, U32, U16, U8, F64, F32, OraI64, OraI32, OraI16, OraI8, OraU64, OraU32, OraU16, OraU8, OraF64, OraF32, N, OraN.
Returns an error if a non-numeric GoColumnType is specified.
func (c RsetCfg) SetLong(gct GoColumnType) RsetCfg
SetLong sets a GoColumnType associated to an Oracle select-list LONG column.
Valid values are S and OraS.
Returns an error if a non-string GoColumnType is specified.
func (c RsetCfg) SetLongRaw(gct GoColumnType) RsetCfg
SetLongRaw sets a GoColumnType associated to an Oracle select-list LONG RAW column.
Valid values are Bits and OraBits.
Returns an error if a non-string GoColumnType is specified.
func (c RsetCfg) SetNumberBigFloat(gct GoColumnType) RsetCfg
SetNumberBigFloat sets a GoColumnType associated to an Oracle select-list NUMBER column defined with a scale greater than zero and precision unkonw or > 15.
Valid values are I64, I32, I16, I8, U64, U32, U16, U8, F64, F32, OraI64, OraI32, OraI16, OraI8, OraU64, OraU32, OraU16, OraU8, OraF64, OraF32, N, OraN.
Returns an error if a non-numeric GoColumnType is specified.
func (c RsetCfg) SetNumberBigInt(gct GoColumnType) RsetCfg
SetNumberBigInt sets a GoColumnType associated to an Oracle select-list NUMBER column defined with scale zero and precision unknown or > 19.
Valid values are I64, I32, I16, I8, U64, U32, U16, U8, F64, F32, OraI64, OraI32, OraI16, OraI8, OraU64, OraU32, OraU16, OraU8, OraF64, OraF32, N, OraN.
Returns an error if a non-numeric GoColumnType is specified.
func (c RsetCfg) SetNumberFloat(gct GoColumnType) RsetCfg
SetNumberFloat sets a GoColumnType associated to an Oracle select-list NUMBER column defined with a scale greater than zero and precision <= 15.
Valid values are I64, I32, I16, I8, U64, U32, U16, U8, F64, F32, OraI64, OraI32, OraI16, OraI8, OraU64, OraU32, OraU16, OraU8, OraF64, OraF32, N, OraN.
Returns an error if a non-numeric GoColumnType is specified.
func (c RsetCfg) SetNumberInt(gct GoColumnType) RsetCfg
SetNumberInt sets a GoColumnType associated to an Oracle select-list NUMBER column defined with scale zero and precision <= 19.
Valid values are I64, I32, I16, I8, U64, U32, U16, U8, F64, F32, OraI64, OraI32, OraI16, OraI8, OraU64, OraU32, OraU16, OraU8, OraF64, OraF32, N, OraN.
Returns an error if a non-numeric GoColumnType is specified.
func (c RsetCfg) SetRaw(gct GoColumnType) RsetCfg
SetRaw sets a GoColumnType associated to an Oracle select-list RAW column.
Valid values are Bits and OraBits.
Returns an error if a non-string GoColumnType is specified.
func (c RsetCfg) SetTimestamp(gct GoColumnType) RsetCfg
SetTimestamp sets a GoColumnType associated to an Oracle select-list TIMESTAMP column.
Valid values are T and OraT.
Returns an error if a non-time GoColumnType is specified.
func (c RsetCfg) SetTimestampLtz(gct GoColumnType) RsetCfg
SetTimestampLtz sets a GoColumnType associated to an Oracle select-list TIMESTAMP WITH LOCAL TIME ZONE column.
Valid values are T and OraT.
Returns an error if a non-time GoColumnType is specified.
func (c RsetCfg) SetTimestampTz(gct GoColumnType) RsetCfg
SetTimestampTz sets a GoColumnType associated to an Oracle select-list TIMESTAMP WITH TIME ZONE column.
Valid values are T and OraT.
Returns an error if a non-time GoColumnType is specified.
func (c RsetCfg) SetVarchar(gct GoColumnType) RsetCfg
SetVarchar sets a GoColumnType associated to an Oracle select-list VARCHAR column, VARCHAR2 column and NVARCHAR2 column.
Valid values are S and OraS.
Returns an error if a non-string GoColumnType is specified.
func (c RsetCfg) Timestamp() GoColumnType
Timestamp returns a GoColumnType associated to an Oracle select-list TIMESTAMP column.
The default is T.
Timestamp is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Timestamp is used.
func (c RsetCfg) TimestampLtz() GoColumnType
TimestampLtz returns a GoColumnType associated to an Oracle select-list TIMESTAMP WITH LOCAL TIME ZONE column.
The default is T.
TimestampLtz is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, TimestampLtz is used.
func (c RsetCfg) TimestampTz() GoColumnType
TimestampTz returns a GoColumnType associated to an Oracle select-list TIMESTAMP WITH TIME ZONE column.
The default is T.
TimestampTz is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, TimestampTz is used.
func (c RsetCfg) Varchar() GoColumnType
Varchar returns a GoColumnType associated to an Oracle select-list VARCHAR column, VARCHAR2 column and NVARCHAR2 column.
The default is S.
Varchar is used by the database/sql package.
When using the ora package directly, custom GoColumnType associations may be specified to the Ses.Prep method. If no custom GoColumnType association is specified, Varchar is used.
type Ses struct {
sync.RWMutex
}
Ses is an Oracle session associated with a server.
func (ses *Ses) Break() (err error)
Break stops the currently running OCI function.
func (ses *Ses) Cfg() SesCfg
Cfg returns the Ses's SesCfg, or it's Srv's, if not set. If the ses.srv.env is the PkgSqlEnv, that will override StmtCfg!
func (ses *Ses) Close() (err error)
Close ends a session on an Oracle server.
Any open statements associated with the session are closed.
Calling Close will cause Ses.IsOpen to return false. Once closed, a session cannot be re-opened. Call Srv.OpenSes to open a new session.
func (ses *Ses) Env() *Env
func (ses *Ses) Ins(tbl string, columnPairs ...interface{}) (err error)
Ins composes, prepares and executes a sql INSERT statement returning a possible error.
Ins offers convenience when specifying a long list of sql columns.
Ins expects at least two column name-value pairs where the last pair will be a part of a sql RETURNING clause. The last column name is expected to be an identity column returning an Oracle-generated value. The last value specified to the variadic parameter 'columnPairs' is expected to be a pointer capable of receiving the identity value.
func (ses *Ses) IsOpen() bool
IsOpen returns true when a session is open; otherwise, false.
Calling Close will cause Ses.IsOpen to return false. Once closed, a session cannot be re-opened. Call Srv.OpenSes to open a new session.
func (s *Ses) Name(calc func() string) string
Name sets the name to the result of calc once, then returns that result forever. (Effectively caches the result of calc().)
func (ses *Ses) NumStmt() int
NumStmt returns the number of open Oracle statements.
func (ses *Ses) NumTx() int
NumTx returns the number of open Oracle transactions.
func (ses *Ses) Ping() (err error)
Ping returns nil when an Oracle server is contacted; otherwise, an error.
func (ses *Ses) Prep(sql string, gcts ...GoColumnType) (stmt *Stmt, err error)
Prep prepares a sql statement returning a *Stmt and possible error.
func (ses *Ses) PrepAndExe(sql string, params ...interface{}) (rowsAffected uint64, err error)
PrepAndExe prepares and executes a SQL statement returning the number of rows affected and a possible error, using Exe, calling in batch for arrays.
WARNING: just as sql.QueryRow, the prepared statement is closed right after execution, with all its siblings (Lobs, Rsets...)!
So if you want to retrieve and use such objects, you have to first Prep, then Exe separately (and close the Stmt returned by Prep after finishing with those objects).
func (ses *Ses) PrepAndExeP(sql string, params ...interface{}) (rowsAffected uint64, err error)
PrepAndExeP prepares and executes a SQL statement returning the number of rows affected and a possible error, using ExeP, so passing arrays as is.
func (ses *Ses) PrepAndQry(sql string, params ...interface{}) (rset *Rset, err error)
PrepAndQry prepares a SQL statement and queries an Oracle server returning an *Rset and a possible error.
If an error occurs during Prep or Qry a nil *Rset will be returned.
The *Stmt internal to this method is automatically closed when the *Rset retrieves all rows or returns an error.
func (ses *Ses) Sel(sqlFrom string, columnPairs ...interface{}) (rset *Rset, err error)
Sel composes, prepares and queries a sql SELECT statement returning an *ora.Rset and possible error.
Sel offers convenience when specifying a long list of sql columns with non-default GoColumnTypes.
Specify a sql FROM clause with one or more pairs of sql column name-GoColumnType pairs. The FROM clause may have additional SQL clauses such as WHERE, HAVING, etc.
func (ses *Ses) SetAction(module, action string) error
SetAction sets the MODULE and ACTION attribute of the session.
func (ses *Ses) SetCfg(cfg SesCfg)
func (ses *Ses) StartTx(opts ...TxOption) (tx *Tx, err error)
StartTx starts an Oracle transaction returning a *Tx and possible error.
func (ses *Ses) Timezone() (*time.Location, error)
Timezone return the current session's timezone.
func (ses *Ses) Upd(tbl string, columnPairs ...interface{}) (err error)
Upd composes, prepares and executes a sql UPDATE statement returning a possible error.
Upd offers convenience when specifying a long list of sql columns.
type SesCfg struct {
Username string
Password string
Mode SessionMode
StmtCfg
}
func NewSesCfg() SesCfg
func (c SesCfg) IsZero() bool
func (c SesCfg) SetBinaryDouble(gct GoColumnType) SesCfg
func (c SesCfg) SetBinaryFloat(gct GoColumnType) SesCfg
func (c SesCfg) SetBlob(gct GoColumnType) SesCfg
func (c SesCfg) SetByteSlice(gct GoColumnType) SesCfg
func (c SesCfg) SetChar(gct GoColumnType) SesCfg
func (c SesCfg) SetChar1(gct GoColumnType) SesCfg
func (c SesCfg) SetClob(gct GoColumnType) SesCfg
func (c SesCfg) SetDate(gct GoColumnType) SesCfg
func (c SesCfg) SetFloat(gct GoColumnType) SesCfg
func (c SesCfg) SetLobBufferSize(size int) SesCfg
func (c SesCfg) SetLong(gct GoColumnType) SesCfg
func (c SesCfg) SetLongBufferSize(size uint32) SesCfg
func (c SesCfg) SetLongRaw(gct GoColumnType) SesCfg
func (c SesCfg) SetLongRawBufferSize(size uint32) SesCfg
func (c SesCfg) SetNumberBigFloat(gct GoColumnType) SesCfg
func (c SesCfg) SetNumberBigInt(gct GoColumnType) SesCfg
func (c SesCfg) SetNumberFloat(gct GoColumnType) SesCfg
func (c SesCfg) SetNumberInt(gct GoColumnType) SesCfg
func (c SesCfg) SetPrefetchMemorySize(prefetchMemorySize uint32) SesCfg
func (c SesCfg) SetPrefetchRowCount(prefetchRowCount uint32) SesCfg
func (c SesCfg) SetRaw(gct GoColumnType) SesCfg
func (cfg SesCfg) SetStmtCfg(stmtCfg StmtCfg) SesCfg
func (c SesCfg) SetStringPtrBufferSize(size int) SesCfg
func (c SesCfg) SetTimestamp(gct GoColumnType) SesCfg
func (c SesCfg) SetTimestampLtz(gct GoColumnType) SesCfg
func (c SesCfg) SetTimestampTz(gct GoColumnType) SesCfg
func (c SesCfg) SetVarchar(gct GoColumnType) SesCfg
type SesPool struct {
}
func (p *SesPool) Close() error
func (p *SesPool) Get() (*Ses, error)
Get a session from an idle Srv.
func (p *SesPool) Put(ses *Ses)
Put the session back to the session pool.
func (p SesPool) SetEvictDuration(dur time.Duration)
Set the eviction duration to the given. Also starts eviction if not yet started.
type SessionMode uint8
func DSNMode(str string) SessionMode
DSNMode returns the SessionMode (SysDefault/SysDba/SysOper).
type Srv struct {
sync.RWMutex
}
Srv represents an Oracle server.
func (srv *Srv) Cfg() SrvCfg
Cfg returns the Srv's SrvCfg, or it's Env's, if not set. If the env is the PkgSqlEnv, that will override StmtCfg!
func (srv *Srv) Close() (err error)
Close disconnects from an Oracle server.
Any open sessions associated with the server are closed.
Calling Close will cause Srv.IsOpen to return false. Once closed, a server cannot be re-opened. Call Env.OpenSrv to open a new server.
func (srv *Srv) IsOpen() bool
IsOpen returns true when the server is open; otherwise, false.
Calling Close will cause Srv.IsOpen to return false. Once closed, a server cannot be re-opened. Call Env.OpenSrv to open a new server.
func (srv *Srv) IsUTF8() bool
IsUTF8 returns whether the DB uses AL32UTF8 encoding.
func (s *Srv) Name(calc func() string) string
Name sets the name to the result of calc once, then returns that result forever. (Effectively caches the result of calc().)
func (srv *Srv) NewSesPool(sesCfg SesCfg, size int) *SesPool
NewSesPool returns a session pool, which evicts the idle sessions in every minute. The pool holds at most size idle Ses. If size is zero, DefaultPoolSize will be used.
func (srv *Srv) NumSes() int
NumSes returns the number of open Oracle sessions.
func (srv *Srv) OpenSes(cfg SesCfg) (ses *Ses, err error)
OpenSes opens an Oracle session returning a *Ses and possible error.
func (srv *Srv) SetCfg(cfg SrvCfg)
func (srv *Srv) Version() (ver string, err error)
Version returns the Oracle database server version.
Version requires the server have at least one open session.
type SrvCfg struct {
// Dblink specifies an Oracle database server. Dblink is a connect string
// or a service point.
Dblink string
Pool PoolCfg
// StmtCfg configures new Stmts.
StmtCfg
}
SrvCfg configures a new Srv.
func (c SrvCfg) IsZero() bool
type SrvPool struct {
}
func (p *SrvPool) Close() error
func (p *SrvPool) Get() (*Srv, error)
Get a connection.
func (p *SrvPool) Put(srv *Srv)
Put the connection back to the idle pool.
func (p SrvPool) SetEvictDuration(dur time.Duration)
Set the eviction duration to the given. Also starts eviction if not yet started.
type Stmt struct {
sync.RWMutex
}
Stmt represents an Oracle statement.
func (stmt *Stmt) Cfg() StmtCfg
Cfg returns the Stmt's StmtCfg, or it's Ses's, if not set. If the env is the PkgSqlEnv, that will override StmtCfg!
func (stmt *Stmt) Close() (err error)
Close closes the SQL statement.
Calling Close will cause Stmt.IsOpen to return false. Once closed, a statement cannot be re-opened. Call Stmt.Prep to create a new statement.
func (stmt *Stmt) Env() *Env
func (stmt *Stmt) Exe(params ...interface{}) (rowsAffected uint64, err error)
Exe executes a SQL statement on an Oracle server returning the number of rows affected and a possible error.
Slice arguments should have the same length, as they'll be called in batch mode.
func (stmt *Stmt) ExeP(params ...interface{}) (rowsAffected uint64, err error)
ExeP executes an (PL/)SQL statement on an Oracle server returning the number of rows affected and a possible error.
All arguments are sent as is (esp. slices).
func (stmt *Stmt) Gcts() []GoColumnType
Gcts returns a slice of GoColumnType specified by Ses.Prep or Stmt.SetGcts.
Gcts is used by a Stmt.Qry *ora.Rset to determine which Go types are mapped to a sql select-list.
func (stmt *Stmt) IsOpen() bool
IsOpen returns true when a statement is open; otherwise, false.
Calling Close will cause Stmt.IsOpen to return false. Once closed, a statement cannot be re-opened. Call Stmt.Prep to create a new statement.
func (s *Stmt) Name(calc func() string) string
Name sets the name to the result of calc once, then returns that result forever. (Effectively caches the result of calc().)
func (stmt *Stmt) NumInput() int
NumInput returns the number of placeholders in a sql statement.
func (stmt *Stmt) NumRset() int
NumRset returns the number of open Oracle result sets.
func (stmt *Stmt) Parse() (err error)
Parse the statement, and return the syntax errors - WITHOUT executing it. Rejects ALTER statements, as they're executed anyway by Oracle...
func (stmt *Stmt) Qry(params ...interface{}) (*Rset, error)
Qry runs a SQL query on an Oracle server returning a *Rset and possible error.
func (stmt *Stmt) SelfCfg() StmtCfg
returns the Stmt's StmtCfg only
func (stmt *Stmt) SetCfg(cfg StmtCfg)
func (stmt *Stmt) SetGcts(gcts []GoColumnType) []GoColumnType
SetGcts sets a slice of GoColumnType used in a Stmt.Qry *ora.Rset.
SetGcts is optional.
type StmtCfg struct {
// IsAutoCommitting determines whether DML statements are automatically
// committed.
//
// The default is true.
//
// IsAutoCommitting is not observed during a transaction.
IsAutoCommitting bool
// RTrimChar makes returning from CHAR colums trim the blanks (spaces)
// from the end of the string, added by Oracle.
//
// The default is true.
RTrimChar bool
// FalseRune represents the false Go bool value sent to an Oracle server
// during a parameter bind.
//
// The is default is '0'.
FalseRune rune
// TrueRune represents the true Go bool value sent to an Oracle server
// during a parameter bind.
//
// The is default is '1'.
TrueRune rune
// Rset represents configuration options for an Rset struct.
RsetCfg
// Err is the error from the last Set... call, if there's any.
Err error
}
StmtCfg affects various aspects of a SQL statement.
Assign values to StmtCfg prior to calling Stmt.Exe and Stmt.Qry for the configuration values to take effect.
StmtCfg is immutable, so every Set method returns a new instance, maybe with Err set, too.
func NewStmtCfg() StmtCfg
NewStmtCfg returns a StmtCfg with default values.
func (c StmtCfg) ByteSlice() GoColumnType
ByteSlice returns a GoColumnType associated to SQL statement []byte parameter.
The default is Bits.
ByteSlice is used by the database/sql package.
Sending a byte slice to an Oracle server as a parameter in a SQL statement requires knowing the destination column type ahead of time. Set ByteSlice to Bits if the destination column is BLOB, RAW or LONG RAW. Set ByteSlice to U8 if the destination column is NUMBER, BINARY_DOUBLE, BINARY_FLOAT or FLOAT.
func (c StmtCfg) FetchLen() int
returns a value of the fetchLen
func (c StmtCfg) IsZero() bool
func (c StmtCfg) LOBFetchLen() int
returns a value of the lobFetchLen
func (c StmtCfg) LobBufferSize() int
LobBufferSize returns the LOB buffer size in bytes used to define the sql select-column buffer size of an Oracle LOB type.
The default is 16,777,216 bytes.
The default is considered a moderate buffer where the 2GB max buffer may not be feasible on all clients.
func (c StmtCfg) LongBufferSize() uint32
LongBufferSize returns the long buffer size in bytes used to define the sql select-column buffer size of an Oracle LONG type.
The default is 16,777,216 bytes.
The default is considered a moderate buffer where the 2GB max buffer may not be feasible on all clients.
func (c StmtCfg) LongRawBufferSize() uint32
LongRawBufferSize returns the LONG RAW buffer size in bytes used to define the sql select-column buffer size of an Oracle LONG RAW type.
The default is 16,777,216 bytes.
The default is considered a moderate buffer where the 2GB max buffer may not be feasible on all clients.
func (c StmtCfg) PrefetchMemorySize() uint32
PrefetchMemorySize returns the prefetch memory size in bytes used during a SQL select command.
The default is 134,217,728 bytes.
PrefetchMemorySize works in coordination with PrefetchRowCount. When PrefetchRowCount is set to zero only PrefetchMemorySize is used; otherwise, the minimum of PrefetchRowCount and PrefetchMemorySize is used.
func (c StmtCfg) PrefetchRowCount() uint32
PrefetchRowCount returns the number of rows to prefetch during a select query.
The default is 0.
PrefetchRowCount works in coordination with PrefetchMemorySize. When PrefetchRowCount is set to zero only PrefetchMemorySize is used; otherwise, the minimum of PrefetchRowCount and PrefetchMemorySize is used.
func (c StmtCfg) SetBinaryDouble(gct GoColumnType) StmtCfg
func (c StmtCfg) SetBinaryFloat(gct GoColumnType) StmtCfg
func (c StmtCfg) SetBlob(gct GoColumnType) StmtCfg
func (c StmtCfg) SetByteSlice(gct GoColumnType) StmtCfg
SetByteSlice sets a GoColumnType associated to SQL statement []byte parameter.
Valid values are U8 and Bits.
Returns an error if U8 or Bits is not specified.
func (c StmtCfg) SetChar(gct GoColumnType) StmtCfg
func (c StmtCfg) SetChar1(gct GoColumnType) StmtCfg
func (c StmtCfg) SetClob(gct GoColumnType) StmtCfg
func (c StmtCfg) SetDate(gct GoColumnType) StmtCfg
func (c StmtCfg) SetFetchLen(length int) StmtCfg
SetFetchLen overrides DefaultFetchLen for prefetch lengths.
func (c StmtCfg) SetFloat(gct GoColumnType) StmtCfg
func (c StmtCfg) SetLOBFetchLen(length int) StmtCfg
SetLOBFetchLen overrides DefaultLOBFetchLen for prefetch LOB lengths.
This affects result sets with any of the following column types: C.SQLT_LNG, C.SQLT_BFILE, C.SQLT_BLOB, C.SQLT_CLOB, C.SQLT_LBI
Caution: the default buffer size for blob is 1MB. So, for example a single fetch from the result set that contains just one blob will consume 128MB of RAM
func (c StmtCfg) SetLobBufferSize(size int) StmtCfg
SetLobBufferSize sets the LOB buffer size in bytes.
The maximum is 2,147,483,642 bytes.
Returns an error if the specified size is greater than 2,147,483,642.
func (c StmtCfg) SetLong(gct GoColumnType) StmtCfg
func (c StmtCfg) SetLongBufferSize(size uint32) StmtCfg
SetLongBufferSize sets the long buffer size in bytes.
The maximum is 2,147,483,642 bytes.
Returns an error if the specified size is less than 1 or greater than 2,147,483,642.
func (c StmtCfg) SetLongRaw(gct GoColumnType) StmtCfg
func (c StmtCfg) SetLongRawBufferSize(size uint32) StmtCfg
SetLongRawBufferSize sets the LONG RAW buffer size in bytes.
The maximum is 2,147,483,642 bytes.
Returns an error if the specified size is greater than 2,147,483,642.
func (c StmtCfg) SetNumberBigFloat(gct GoColumnType) StmtCfg
func (c StmtCfg) SetNumberBigInt(gct GoColumnType) StmtCfg
func (c StmtCfg) SetNumberFloat(gct GoColumnType) StmtCfg
func (c StmtCfg) SetNumberInt(gct GoColumnType) StmtCfg
func (c StmtCfg) SetPrefetchMemorySize(prefetchMemorySize uint32) StmtCfg
SetPrefetchMemorySize sets the prefetch memory size in bytes used during a SQL select command.
func (c StmtCfg) SetPrefetchRowCount(prefetchRowCount uint32) StmtCfg
SetPrefetchRowCount sets the number of rows to prefetch during a select query.
func (c StmtCfg) SetRaw(gct GoColumnType) StmtCfg
func (c StmtCfg) SetStringPtrBufferSize(size int) StmtCfg
SetStringPtrBufferSize sets the size of a buffer used to store a string during *string parameter binding and []*string parameter binding in a SQL statement.
func (c StmtCfg) SetTimestamp(gct GoColumnType) StmtCfg
func (c StmtCfg) SetTimestampLtz(gct GoColumnType) StmtCfg
func (c StmtCfg) SetTimestampTz(gct GoColumnType) StmtCfg
func (c StmtCfg) SetVarchar(gct GoColumnType) StmtCfg
func (c StmtCfg) StringPtrBufferSize() int
StringPtrBufferSize returns the size of a buffer in bytes used to store a string during *string parameter binding and []*string parameter binding in a SQL statement.
The default is 4000 bytes.
For a *string parameter binding, you may wish to increase the size of StringPtrBufferSize depending on the Oracle column type. For VARCHAR2, NVARCHAR2, and RAW oracle columns the Oracle MAX_STRING_SIZE is usually 4000 but may be set up to 32767.
type String struct {
IsNull bool
Value string
}
String is a nullable string.
func (this String) Equals(other String) bool
Equals returns true when the receiver and specified String are both null, or when the receiver and specified String are both not null and Values are equal.
func (this String) MarshalJSON() ([]byte, error)
func (this String) String() string
func (this *String) UnmarshalJSON(p []byte) error
type Time struct {
IsNull bool
Value time.Time
}
Time is a nullable time.Time.
func (this Time) Equals(other Time) bool
Equals returns true when the receiver and specified Time are both null, or when the receiver and specified Time are both not null and Values are equal.
func (this Time) MarshalJSON() ([]byte, error)
func (this *Time) UnmarshalJSON(p []byte) error
type Tx struct {
sync.RWMutex
}
Tx represents an Oracle transaction associated with a session.
Implements the driver.Tx interface.
func (tx *Tx) Commit() (err error)
Commit commits the transaction.
Commit is a member of the driver.Tx interface.
func (tx *Tx) Rollback() (err error)
Rollback rolls back a transaction.
Rollback is a member of the driver.Tx interface.
type TxOption func(*txOption)
func TxFlags(flags uint32) TxOption
func TxTimeout(timeout time.Duration) TxOption
type Uint16 struct {
IsNull bool
Value uint16
}
Uint16 is a nullable uint16.
func (this Uint16) Equals(other Uint16) bool
Equals returns true when the receiver and specified Uint16 are both null, or when the receiver and specified Uint16 are both not null and Values are equal.
func (this Uint16) MarshalJSON() ([]byte, error)
func (this *Uint16) UnmarshalJSON(p []byte) error
type Uint32 struct {
IsNull bool
Value uint32
}
Uint32 is a nullable uint32.
func (this Uint32) Equals(other Uint32) bool
Equals returns true when the receiver and specified Uint32 are both null, or when the receiver and specified Uint32 are both not null and Values are equal.
func (this Uint32) MarshalJSON() ([]byte, error)
func (this *Uint32) UnmarshalJSON(p []byte) error
type Uint64 struct {
IsNull bool
Value uint64
}
Uint64 is a nullable uint64.
func (this Uint64) Equals(other Uint64) bool
Equals returns true when the receiver and specified Uint64 are both null, or when the receiver and specified Uint64 are both not null and Values are equal.
func (this Uint64) MarshalJSON() ([]byte, error)
func (this *Uint64) UnmarshalJSON(p []byte) error
type Uint8 struct {
IsNull bool
Value uint8
}
Uint8 is a nullable uint8.
func (this Uint8) Equals(other Uint8) bool
Equals returns true when the receiver and specified Uint8 are both null, or when the receiver and specified Uint8 are both not null and Values are equal.
func (this Uint8) MarshalJSON() ([]byte, error)
func (this *Uint8) UnmarshalJSON(p []byte) error
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