cordova-sqlite-storage
Advanced tools
Native SQLite component with API based on HTML5/Web SQL (DRAFT) API for the following platforms:
LICENSE: MIT, with Apache 2.0 option for Android and Windows platforms (see LICENSE.md for details, including third-party components used by this plugin)
with possible corruption risk in case of sqlite access from multiple plugins (see below)
New release in June 2018 will include the following major enhancements:
Breaking changes expected:
This is the common plugin version branch which supports the most widely used features and serves as the basis for the other versions.
This version branch uses a before_plugin_install hook to install sqlite3 library dependencies from cordova-sqlite-storage-dependencies via npm.
This plugin uses a non-standard Android-sqlite-connector implementation on Android. In case an application access the SAME database using multiple plugins there is a risk of data corruption ref: litehelpers/Cordova-sqlite-storage#626) as described in http://ericsink.com/entries/multiple_sqlite_problem.html and https://www.sqlite.org/howtocorrupt.html.
The workaround is to use the androidDatabaseImplementation: 2 setting as described in the Android sqlite implementation section below:
var db = window.sqlitePlugin.openDatabase({
name: 'my.db',
location: 'default',
androidDatabaseImplementation: 2
});
This plugin version also uses a fixed version of sqlite3 on iOS, macOS, and Windows. In case the application accesses the SAME database using multiple plugins there is a risk of data corruption as described in https://www.sqlite.org/howtocorrupt.html (similar to the multiple sqlite problem for Android as described in http://ericsink.com/entries/multiple_sqlite_problem.html).
The primary author and maintainer @brodybits (Christopher J. Brody aka Chris Brody) is available for part-time contract assignments. Services available for this project include:
Other services available include:
For more information:
To open a database:
var db = null;
document.addEventListener('deviceready', function() {
db = window.sqlitePlugin.openDatabase({
name: 'my.db',
location: 'default',
});
});
IMPORTANT: Like with the other Cordova plugins your application must wait for the deviceready event. This is especially tricky in Angular/ngCordova/Ionic controller/factory/service callbacks which may be triggered before the deviceready event is fired.
To populate a database using the DRAFT standard transaction API:
db.transaction(function(tx) {
tx.executeSql('CREATE TABLE IF NOT EXISTS DemoTable (name, score)');
tx.executeSql('INSERT INTO DemoTable VALUES (?,?)', ['Alice', 101]);
tx.executeSql('INSERT INTO DemoTable VALUES (?,?)', ['Betty', 202]);
}, function(error) {
console.log('Transaction ERROR: ' + error.message);
}, function() {
console.log('Populated database OK');
});
To check the data using the "standard" (deprecated) transaction API:
db.transaction(function(tx) {
tx.executeSql('SELECT count(*) AS mycount FROM DemoTable', [], function(tx, rs) {
console.log('Record count (expected to be 2): ' + rs.rows.item(0).mycount);
}, function(tx, error) {
console.log('SELECT error: ' + error.message);
});
});
To populate a database using the SQL batch API:
db.sqlBatch([
'CREATE TABLE IF NOT EXISTS DemoTable (name, score)',
[ 'INSERT INTO DemoTable VALUES (?,?)', ['Alice', 101] ],
[ 'INSERT INTO DemoTable VALUES (?,?)', ['Betty', 202] ],
], function() {
console.log('Populated database OK');
}, function(error) {
console.log('SQL batch ERROR: ' + error.message);
});
To check the data using the single SQL statement API:
db.executeSql('SELECT count(*) AS mycount FROM DemoTable', [], function(rs) {
console.log('Record count (expected to be 2): ' + rs.rows.item(0).mycount);
}, function(error) {
console.log('SELECT SQL statement ERROR: ' + error.message);
});
See the Sample section for a sample with a more detailed explanation (using the DRAFT standard transaction API).
6.5.0 / 7.1.0 / 8.0.0) is recommended. Cordova versions older than 6.0.0 are missing the cordova-ios@4.0.0 security fixes. In addition it may be needed to use cordova prepare in case of cordova-ios older than 4.3.0 (Cordova CLI 6.4.0).before_plugin_install hook to install sqlite3 library dependencies from cordova-sqlite-storage-dependencies via npm.before_plugin_install hook. The supported solution is to use litehelpers / Cordova-sqlite-evcore-extbuild-free (GPL or commercial license terms); alternative with permissive license terms is available at: brodybits / cordova-sqlite-legacy-build-support (limited testing, limited updates).3.22.0 included when building (all platforms), with the following compile-time definitions:
SQLITE_THREADSAFE=1SQLITE_DEFAULT_SYNCHRONOUS=3 (EXTRA DURABLE build setting) ref: litehelpers/Cordova-sqlite-storage#736SQLITE_DEFAULT_MEMSTATUS=0SQLITE_OMIT_DECLTYPESQLITE_OMIT_DEPRECATEDSQLITE_OMIT_PROGRESS_CALLBACKSQLITE_OMIT_SHARED_CACHESQLITE_TEMP_STORE=2SQLITE_OMIT_LOAD_EXTENSIONSQLITE_ENABLE_FTS3SQLITE_ENABLE_FTS3_PARENTHESISSQLITE_ENABLE_FTS4SQLITE_ENABLE_RTREESQLITE_DEFAULT_PAGE_SIZE=1024 and SQLITE_DEFAULT_CACHE_SIZE=2000 to avoid "potentially distruptive change(s)" from SQLite 3.12.0 described at: http://sqlite.org/pgszchng2016.htmlSQLITE_OS_WINRT (Windows only)NDEBUG on Windows (Release build only)\u0000 character (same as \0)UTF-16le internal database encoding while the other platform versions use UTF-8 internal encoding. (UTF-8 internal encoding is preferred ref: litehelpers/Cordova-sqlite-storage#652)PRAGMA journal_mode setting (tested):
androidDatabaseImplementation option in window.sqlitePlugin.openDatabase): persist (pre-8.x) / truncate (Android 8+)deleteVACUUM or PRAGMA auto_vacuum is used then sqlite will automatically reuse deleted data space for new data but the database file will never shrink. For reference: http://www.sqlite.org/pragma.html#pragma_auto_vacuum and litehelpers/Cordova-sqlite-storage#6463.22.0) with SQLITE_DEFAULT_SYNCHRONOUS=3 (EXTRA DURABLE) build setting to be extra robust against possible database corruption ref: litehelpers/Cordova-sqlite-storage#736openDatabase and deleteDatabase iosDatabaseLocation optionwindow.openDatabase() factory call with window.sqlitePlugin.openDatabase(), with parameters as documented below. Known deviations are documented in the deviations section below.TIP: It is possible to migrate from Cordova to a pure native solution and continue using the data stored by this plugin.
cordova-plugin-dialogs or an echo plugin and get it working. Ideally you should be able to handle a callback with some data coming from a prompt.These prereqisites are very well documented in a number of excellent resources including:
More resources can be found by https://www.google.com/search?q=cordova+tutorial. There are even some tutorials available on YouTube as well.
In addition, this guide assumes a basic knowledge of some key JavaScript concepts such as variables, function calls, and callback functions. There is an excellent explanation of JavaScript callbacks at http://cwbuecheler.com/web/tutorials/2013/javascript-callbacks/.
MAJOR TIPS: As described in the Installing section:
--save flag when installing plugins to track them in config.xml in case of Cordova CLI pre-7.x. If all plugins are tracked in config.xml then there is no need to commit the plugins subdirectory tree into the source repository.platforms subdirectory tree into the source repository.NOTICE: This plugin is only supported with the Cordova CLI. This plugin is not supported with other Cordova/PhoneGap systems such as PhoneGap CLI, PhoneGap Build, Plugman, Intel XDK, Webstorm, etc.
The Windows platform can present a number of challenges which increase when using this plugin. The following tips are recommended for getting started with Windows:
Use the following command to install this plugin version from the Cordova CLI:
cordova plugin add cordova-sqlite-storage # --save RECOMMENDED for Cordova CLI pre-7.0
Add any desired platform(s) if not already present, for example:
cordova platform add android
OPTIONAL: prepare before building (MANDATORY for cordova-ios older than 4.3.0 (Cordova CLI 6.4.0))
cordova prepare
or to prepare for a single platform, Android for example:
cordova prepare android
Please see the Installing section for more details.
NOTE: The new brodybits / cordova-sqlite-test-app project includes the echo test, self test, and string test described below along with some more sample functions.
Try the following programs to verify successful installation and operation:
Echo test - verify successful installation and build:
document.addEventListener('deviceready', function() {
window.sqlitePlugin.echoTest(function() {
console.log('ECHO test OK');
});
});
Self test - automatically verify basic database access operations including opening a database; basic CRUD operations (create data in a table, read the data from the table, update the data, and delete the data); close and delete the database:
document.addEventListener('deviceready', function() {
window.sqlitePlugin.selfTest(function() {
console.log('SELF test OK');
});
});
NOTE: It may be easier to use a JavaScript or native alert function call along with (or instead of) console.log to verify that the installation passes both tests. Same for the SQL string test variations below. (Note that the Windows platform does not support the standard alert function, please use cordova-plugin-dialogs instead.)
This test verifies that you can open a database, execute a basic SQL statement, and get the results (should be TEST STRING):
document.addEventListener('deviceready', function() {
var db = window.sqlitePlugin.openDatabase({name: 'test.db', location: 'default'});
db.transaction(function(tr) {
tr.executeSql("SELECT upper('Test string') AS upperString", [], function(tr, rs) {
console.log('Got upperString result: ' + rs.rows.item(0).upperString);
});
});
});
Here is a variation that uses a SQL parameter instead of a string literal:
document.addEventListener('deviceready', function() {
var db = window.sqlitePlugin.openDatabase({name: 'test.db', location: 'default'});
db.transaction(function(tr) {
tr.executeSql('SELECT upper(?) AS upperString', ['Test string'], function(tr, rs) {
console.log('Got upperString result: ' + rs.rows.item(0).upperString);
});
});
});
It is recommended to read through the usage and sample sections before building more complex applications. In general it is recommended to start by doing things one step at a time, especially when an application does not work as expected.
The new brodybits / cordova-sqlite-test-app sample is intended to be a boilerplate to reproduce and demonstrate any issues you may have with this plugin. You may also use it as a starting point to build a new app.
In case you get stuck with something please read through the support section and follow the instructions before raising an issue. Professional support is also available by contacting: sales@litehelpers.net
cordova-sqlite-storage plugin version)cordova-sqlite-storage plugin version)cordova-sqlite-storage plugin version)NOTICE: The above tutorial shows cordova plugin add cordova-sqlite-storage with the --save flag missing, needed in case of Cordova CLI pre-7.0 to keep the plugins in config.xml (automatic starting with Cordova CLI 7.0).
Other plugin tutorials wanted ref: litehelpers/Cordova-sqlite-storage#609
According to Web SQL Database API 7.2 Sensitivity of data:
User agents should treat persistently stored data as potentially sensitive; it's quite possible for e-mails, calendar appointments, health records, or other confidential documents to be stored in this mechanism.
To this end, user agents should ensure that when deleting data, it is promptly deleted from the underlying storage.
Unfortunately this plugin will not actually overwrite the deleted content unless the secure_delete PRAGMA is used.
As "strongly recommended" by Web SQL Database API 8.5 SQL injection:
Authors are strongly recommended to make use of the
?placeholder feature of theexecuteSql()method, and to never construct SQL statements on the fly.
window.sqlitePlugin.openDatabase static factory call takes a different set of parameters than the standard Web SQL window.openDatabase static factory call. In case you have to use existing Web SQL code with no modifications please see the Web SQL replacement tip below.transaction.executeSql('INSERT INTO MyTable VALUES (?,?),(?,?)', ['Alice', 101, 'Betty', 102]); which was not supported by SQLite 3.6.19 as referenced by Web SQL (DRAFT) API section 5. The iOS WebKit Web SQL implementation seems to support this as well.Infinity SQL parameter argument values are treated like null by this plugin on Android and iOS ref: litehelpers/Cordova-sqlite-storage#405Infinity result values cause a crash on iOS/macOS cases ref: litehelpers/Cordova-sqlite-storage#405true and false values are handled by converting them to the "true" and "false" TEXT string values, same as WebKit Web SQL on Android and iOS. This does not seem to be 100% correct as discussed in: litehelpers/Cordova-sqlite-storage#545androidDatabaseImplementation: 2 setting described below.SELECT LOWER(X'40414243') AS myresult, SELECT X'40414243' AS myresult, or reading data stored by INSERT INTO MyTable VALUES (X'40414243') are not consistent on Android in case the built-in Android database is used (using the androidDatabaseImplementation: 2 setting in window.sqlitePlugin.openDatabase) or Windows. (These work with Android/iOS WebKit Web SQL and have been supported by SQLite for a number of years.)42, -101, or 1234567890123 are handled as INTEGER values by this plugin on Android, iOS (default UIWebView), and Windows while they are handled as REAL values by (WebKit) Web SQL and this plugin on macOS or iOS with WKWebView. This is evident in certain test operations such as SELECT ? as myresult or SELECT TYPEOF(?) as myresult and storage in a field with TEXT affinity.Infinity, NaN, null, undefined parameter argument values are handled as TEXT string values on Android in case the built-in Android database (androidDatabaseImplementation: 2 setting) is used. (This is evident in certain test operations such as SELECT ? as myresult or SELECT TYPEOF(?) as myresult and storage in a field with TEXT affinity.)false, true, or a string as if there were no arguments while (WebKit) Web SQL would throw an exception. NOTE: In case of a function in place of the SQL arguments array WebKit Web SQL would report a transaction error while the plugin would simply ignore the function.transaction.executeSql(null) or transaction.executeSql(undefined) the plugin throws an exception while (WebKit) Web SQL indicates a transaction failure.transaction.executeSql() with no arguments (Android/iOS WebKit) Web SQL includes includes a code member with value of 0 (SQLError.UNKNOWN_ERR) in the exception while the plugin includes no such code member.Array subclass object where the constructor does not point to Array then the SQL arguments are ignored by the plugin.See Security of sensitive data in the Security section above.
androidDatabaseImplementation: 2 setting in window.sqlitePlugin.openDatabase)androidDatabaseImplementation option in window.sqlitePlugin.openDatabase)androidDatabaseImplementation: 2 setting in window.sqlitePlugin.openDatabase).Some additional issues are tracked in open Cordova-sqlite-storage bug-general issues.
db=window.sqlitePlugin.openDatabase({name: ':memory:', ...}) is currently not supported.\u2028 (line separator) and \u2029 (paragraph separator) characters are currently not supported and known to be broken on iOS, macOS, and Android platform versions due to JSON issues reported in Cordova bug CB-9435 and cordova/cordova-discuss#57. This is fixed with a workaround for iOS/macOS in: litehelpers / Cordova-sqlite-evplus-legacy-free and litehelpers / Cordova-sqlite-evplus-legacy-attach-detach-free (GPL or special commercial license terms) as well as litehelpers / cordova-sqlite-evmax-ext-workers-legacy-build-free (GPL or premium commercial license terms).\u0000 (same as \0) character on Android (default Android-sqlite-connector database implementation) and Windows.\u2028 line separator / \u2029 paragraph separator fixes) in litehelpers / Cordova-sqlite-evplus-legacy-attach-detach-free (GPL or special commercial license terms).androidDatabaseImplementation: 2 (built-in android.database implementation) option is used.x86_64 CPU (litehelpers/Cordova-sqlite-storage#336). Please see litehelpers/Cordova-sqlite-storage#336 (comment) for workaround on x64 CPU. In addition it may be helpful to install Crosswalk as a plugin instead of using Crosswalk to create a project that will use this plugin.window.sqlitePlugin object is NOT properly exported (ES5 feature). It is recommended to use andpor / react-native-sqlite-storage for SQLite database access with React Native Android/iOS instead.?NNN/:AAA/@AAAA/$AAAA parameter placeholders as documented in https://www.sqlite.org/lang_expr.html#varparam and https://www.sqlite.org/c3ref/bind_blob.html) ref: litehelpers/Cordova-sqlite-storage#717Additional limitations are tracked in marked Cordova-sqlite-storage doc-todo issues.
?NNN/:AAA/@AAAA/$AAAA parameter placeholders as documented in https://www.sqlite.org/lang_expr.html#varparam and https://www.sqlite.org/c3ref/bind_blob.html) (currently NOT supported by this plugin) ref: litehelpers/Cordova-sqlite-storage#717window.openDatabase and see if you get the same problems.window.openDatabase call it will not have any of the benefits of this plugin and features such as the sqlBatch call would not be available.sqlitePlugin object name starts with "sql" in small letters.VACUUM or PRAGMA auto_vacuum is used then sqlite will automatically reuse deleted data space for new data but the database file will never shrink. For reference: http://www.sqlite.org/pragma.html#pragma_auto_vacuum and litehelpers/Cordova-sqlite-storage#646windows-identity-name attribute or "WindowsStoreIdentityName" setting.SQLite3.md generally means that there was a problem building the C++ library.Documented in: brodybits / Avoiding-some-Cordova-pitfalls
From https://www.sqlite.org/datatype3.html#section_1:
SQLite uses a more general dynamic type system.
This is generally nice to have, especially in conjunction with a dynamically typed language such as JavaScript. Here are some major SQLite data typing principles:
CREATE TABLE MyTable (data ABC);) and each column type affinity is determined according to pattern matching. If a declared column type name does not match any of the patterns the column has NUMERIC affinity.However there are some possible gotchas:
Note that a declared type of "FLOATING POINT" would give INTEGER affinity, not REAL affinity, due to the "INT" at the end of "POINT". And the declared type of "STRING" has an affinity of NUMERIC, not TEXT.
From https://groups.google.com/forum/#!topic/phonegap/za7z51_fKRw, as discussed in litehelpers/Cordova-sqlite-storage#546: it was discovered that are some more points of possible confusion with date/time. For example, there is also a datetime function that returns date/time in TEXT string format. This should be considered a case of "DATETIME" overloading since SQLite is not case sensitive. This could really become confusing if different programmers or functions consider date/time to be stored in different ways.
FUTURE TBD: Proper date/time handling will be further tested and documented at some point.
To verify that both the Javascript and native part of this plugin are installed in your application:
window.sqlitePlugin.echoTest(successCallback, errorCallback);
To verify that this plugin is able to open a database (named ___$$$___litehelpers___$$$___test___$$$___.db), execute the CRUD (create, read, update, and delete) operations, and clean it up properly:
window.sqlitePlugin.selfTest(successCallback, errorCallback);
IMPORTANT: Please wait for the 'deviceready' event (see below for an example).
window.openDatabase() factory call with window.sqlitePlugin.openDatabase(), with parameters as documented below. Some other known deviations are described throughout this document. Reports of any other deviations would be appreciated.sqlitePlugin.openDatabase to open the database access handle object before it can access the data.NOTE: If a sqlite statement in a transaction fails with an error, the error handler must return false in order to recover the transaction. This is correct according to the HTML5/Web SQL (DRAFT) API standard. This is different from the WebKit implementation of Web SQL in Android and iOS which recovers the transaction if a sql error hander returns a truthy value.
See the Sample section for a sample with detailed explanations.
To open a database access handle object (in the new default location):
var db = window.sqlitePlugin.openDatabase({name: 'my.db', location: 'default'}, successcb, errorcb);
WARNING: The new "default" location value is NOT the same as the old default location and would break an upgrade for an app that was using the old default value (0) on iOS.
WARNING 2: As described above: by default this plugin uses a non-standard Android-sqlite-connector implementation on Android. In case an application access the same database using multiple plugins there is a risk of data corruption ref: litehelpers/Cordova-sqlite-storage#626) as described in http://ericsink.com/entries/multiple_sqlite_problem.html and https://www.sqlite.org/howtocorrupt.html. The workaround is to use the androidDatabaseImplementation: 2 setting as described in the Android sqlite implementation section below.
To specify a different location (affects iOS/macOS only):
var db = window.sqlitePlugin.openDatabase({name: 'my.db', iosDatabaseLocation: 'Library'}, successcb, errorcb);
where the iosDatabaseLocation option may be set to one of the following choices:
default: Library/LocalDatabase subdirectory - NOT visible to iTunes and NOT backed up by iCloudLibrary: Library subdirectory - backed up by iCloud, NOT visible to iTunesDocuments: Documents subdirectory - visible to iTunes and backed up by iCloudWARNING: Again, the new "default" iosDatabaseLocation value is NOT the same as the old default location and would break an upgrade for an app using the old default value (0) on iOS.
ALTERNATIVE (deprecated):
var db = window.sqlitePlugin.openDatabase({name: "my.db", location: 1}, successcb, errorcb);with the location option set to one the following choices (affects iOS only):
0 Documents - visible to iTunes and backed up by iCloud1: Library - backed up by iCloud, NOT visible to iTunes2: Library/LocalDatabase - NOT visible to iTunes and NOT backed up by iCloud (same as using "default")No longer supported (see tip below to overwrite window.openDatabase): var db = window.sqlitePlugin.openDatabase("myDatabase.db", "1.0", "Demo", -1);
IMPORTANT: Please wait for the 'deviceready' event, as in the following example:
// Wait for Cordova to load
document.addEventListener('deviceready', onDeviceReady, false);
// Cordova is ready
function onDeviceReady() {
var db = window.sqlitePlugin.openDatabase({name: 'my.db', location: 'default'});
// ...
}
The successcb and errorcb callback parameters are optional but can be extremely helpful in case anything goes wrong. For example:
window.sqlitePlugin.openDatabase({name: 'my.db', location: 'default'}, function(db) {
db.transaction(function(tx) {
// ...
}, function(err) {
console.log('Open database ERROR: ' + JSON.stringify(err));
});
});
If any sql statements or transactions are attempted on a database object before the openDatabase result is known, they will be queued and will be aborted in case the database cannot be opened.
DATABASE NAME NOTES:
/) character(s) are not supported and not expected to work on any platform.* < > ? \ " |OTHER NOTES:
Web SQL replacement tip:
To overwrite window.openDatabase:
window.openDatabase = function(dbname, ignored1, ignored2, ignored3) {
return window.sqlitePlugin.openDatabase({
name: dbname,
location: 'default'
});
};
As documented in the "A User’s iCloud Storage Is Limited" section of iCloudFundamentals in Mac Developer Library iCloud Design Guide (near the beginning):
- iCloudFundamentals in Mac Developer Library iCloud Design Guide
- DO store the following in iCloud:
- [other items omitted]
- Change log files for a SQLite database (a SQLite database’s store file must never be stored in iCloud)
- DO NOT store the following in iCloud:
- [items omitted]
Use the location or iosDatabaseLocation option in sqlitePlugin.openDatabase() to store the database in a subdirectory that is NOT backed up to iCloud, as described in the section below.
NOTE: Changing BackupWebStorage in config.xml has no effect on a database created by this plugin. BackupWebStorage applies only to local storage and/or Web SQL storage created in the WebView (not using this plugin). For reference: phonegap/build#338 (comment)
By default, this plugin uses Android-sqlite-connector, which is lightweight and should be more efficient than the built-in Android database classes. To use the built-in Android database classes instead:
var db = window.sqlitePlugin.openDatabase({
name: 'my.db',
location: 'default',
androidDatabaseImplementation: 2
});
IMPORTANT:
androidDatabaseImplementation: 2 setting as described here.androidDatabaseImplementation: 2 setting, litehelpers/Cordova-sqlite-storage#193 reported (as observed by a number of app developers in the past) that in certain Android versions, if the app is stopped or aborted without closing the database then there is an unexpected database lock and the data that was inserted is lost. The workaround is described below.litehelpers/Cordova-sqlite-storage#193 reported (as observed by a number of app developers in the past) that when using the androidDatabaseImplementation: 2 setting on certain Android versions and if the app is stopped or aborted without closing the database then:
The cause of this issue remains unknown. Of interest: android / platform_external_sqlite commit d4f30d0d15 which references and includes the sqlite commit at: http://www.sqlite.org/src/info/6c4c2b7dba
This is not an issue when the default Android-sqlite-connector database implementation is used, which is the case when no androidDatabaseImplementation setting is used.
There is an optional workaround that simply closes and reopens the database file at the end of every transaction that is committed. The workaround is enabled by opening the database with options as follows:
var db = window.sqlitePlugin.openDatabase({
name: 'my.db',
location: 'default',
androidDatabaseImplementation: 2,
androidLockWorkaround: 1
});
IMPORTANT NOTE: This workaround is only applied when using db.sqlBatch or db.transaction(), not applied when running executeSql() on the database object.
The following types of SQL transactions are supported by this plugin version:
NOTE: Transaction requests are kept in one queue per database and executed in sequential order, according to the HTML5/Web SQL (DRAFT) API.
WARNING: It is possible to request a SQL statement list such as "SELECT 1; SELECT 2" within a single SQL statement string, however the plugin will only execute the first statement and silently ignore the others. This could result in data loss if such a SQL statement list with any INSERT or UPDATE statement(s) are included. For reference: litehelpers/Cordova-sqlite-storage#551
Sample with INSERT:
db.executeSql('INSERT INTO MyTable VALUES (?)', ['test-value'], function (resultSet) {
console.log('resultSet.insertId: ' + resultSet.insertId);
console.log('resultSet.rowsAffected: ' + resultSet.rowsAffected);
}, function(error) {
console.log('SELECT error: ' + error.message);
});
Sample with SELECT:
db.executeSql("SELECT LENGTH('tenletters') AS stringlength", [], function (resultSet) {
console.log('got stringlength: ' + resultSet.rows.item(0).stringlength);
}, function(error) {
console.log('SELECT error: ' + error.message);
});
NOTE/minor bug: The object returned by resultSet.rows.item(rowNumber) is not immutable. In addition, multiple calls to resultSet.rows.item(rowNumber) with the same rowNumber on the same resultSet object return the same object. For example, the following code will show Second uppertext result: ANOTHER:
db.executeSql("SELECT UPPER('First') AS uppertext", [], function (resultSet) {
var obj1 = resultSet.rows.item(0);
obj1.uppertext = 'ANOTHER';
console.log('Second uppertext result: ' + resultSet.rows.item(0).uppertext);
console.log('SELECT error: ' + error.message);
});
Sample:
db.sqlBatch([
'DROP TABLE IF EXISTS MyTable',
'CREATE TABLE MyTable (SampleColumn)',
[ 'INSERT INTO MyTable VALUES (?)', ['test-value'] ],
], function() {
db.executeSql('SELECT * FROM MyTable', [], function (resultSet) {
console.log('Sample column value: ' + resultSet.rows.item(0).SampleColumn);
});
}, function(error) {
console.log('Populate table error: ' + error.message);
});
In case of an error, all changes in a sql batch are automatically discarded using ROLLBACK.
DRAFT standard asynchronous transactions follow the HTML5/Web SQL (DRAFT) API which is very well documented and uses BEGIN and COMMIT or ROLLBACK to keep the transactions failure-safe. Here is a simple example:
db.transaction(function(tx) {
tx.executeSql('DROP TABLE IF EXISTS MyTable');
tx.executeSql('CREATE TABLE MyTable (SampleColumn)');
tx.executeSql('INSERT INTO MyTable VALUES (?)', ['test-value'], function(tx, resultSet) {
console.log('resultSet.insertId: ' + resultSet.insertId);
console.log('resultSet.rowsAffected: ' + resultSet.rowsAffected);
}, function(tx, error) {
console.log('INSERT error: ' + error.message);
});
}, function(error) {
console.log('transaction error: ' + error.message);
}, function() {
console.log('transaction ok');
});
In case of a read-only transaction, it is possible to use readTransaction which will not use BEGIN, COMMIT, or ROLLBACK:
db.readTransaction(function(tx) {
tx.executeSql("SELECT UPPER('Some US-ASCII text') AS uppertext", [], function(tx, resultSet) {
console.log("resultSet.rows.item(0).uppertext: " + resultSet.rows.item(0).uppertext);
}, function(tx, error) {
console.log('SELECT error: ' + error.message);
});
}, function(error) {
console.log('transaction error: ' + error.message);
}, function() {
console.log('transaction ok');
});
WARNING: It is NOT allowed to execute sql statements on a transaction after it has finished. Here is an example from the Populating Cordova SQLite storage with the JQuery API post at http://www.brodybits.com/cordova/sqlite/api/jquery/2015/10/26/populating-cordova-sqlite-storage-with-the-jquery-api.html:
// BROKEN SAMPLE:
var db = window.sqlitePlugin.openDatabase({name: 'my.db', location: 'default'});
db.executeSql("DROP TABLE IF EXISTS tt");
db.executeSql("CREATE TABLE tt (data)");
db.transaction(function(tx) {
$.ajax({
url: 'https://api.github.com/users/litehelpers/repos',
dataType: 'json',
success: function(res) {
console.log('Got AJAX response: ' + JSON.stringify(res));
$.each(res, function(i, item) {
console.log('REPO NAME: ' + item.name);
tx.executeSql("INSERT INTO tt values (?)", JSON.stringify(item.name));
});
}
});
}, function(e) {
console.log('Transaction error: ' + e.message);
}, function() {
// Check results:
db.executeSql('SELECT COUNT(*) FROM tt', [], function(res) {
console.log('Check SELECT result: ' + JSON.stringify(res.rows.item(0)));
});
});
You can find more details and a step-by-step description how to do this right in the Populating Cordova SQLite storage with the JQuery API post at: http://www.brodybits.com/cordova/sqlite/api/jquery/2015/10/26/populating-cordova-sqlite-storage-with-the-jquery-api.html
NOTE/minor bug: Just like the single-statement transaction described above, the object returned by resultSet.rows.item(rowNumber) is not immutable. In addition, multiple calls to resultSet.rows.item(rowNumber) with the same rowNumber on the same resultSet object return the same object. For example, the following code will show Second uppertext result: ANOTHER:
db.readTransaction(function(tx) {
tx.executeSql("SELECT UPPER('First') AS uppertext", [], function(tx, resultSet) {
var obj1 = resultSet.rows.item(0);
obj1.uppertext = 'ANOTHER';
console.log('Second uppertext result: ' + resultSet.rows.item(0).uppertext);
console.log('SELECT error: ' + error.message);
});
});
FUTURE TBD: It should be possible to get a row result object using resultSet.rows[rowNumber], also in case of a single-statement transaction. This is non-standard but is supported by the Chrome desktop browser.
The threading model depends on which platform version is used:
Creates a table, adds a single entry, then queries the count to check if the item was inserted as expected. Note that a new transaction is created in the middle of the first callback.
// Wait for Cordova to load
document.addEventListener('deviceready', onDeviceReady, false);
// Cordova is ready
function onDeviceReady() {
var db = window.sqlitePlugin.openDatabase({name: 'my.db', location: 'default'});
db.transaction(function(tx) {
tx.executeSql('DROP TABLE IF EXISTS test_table');
tx.executeSql('CREATE TABLE IF NOT EXISTS test_table (id integer primary key, data text, data_num integer)');
// demonstrate PRAGMA:
db.executeSql("pragma table_info (test_table);", [], function(res) {
console.log("PRAGMA res: " + JSON.stringify(res));
});
tx.executeSql("INSERT INTO test_table (data, data_num) VALUES (?,?)", ["test", 100], function(tx, res) {
console.log("insertId: " + res.insertId + " -- probably 1");
console.log("rowsAffected: " + res.rowsAffected + " -- should be 1");
db.transaction(function(tx) {
tx.executeSql("select count(id) as cnt from test_table;", [], function(tx, res) {
console.log("res.rows.length: " + res.rows.length + " -- should be 1");
console.log("res.rows.item(0).cnt: " + res.rows.item(0).cnt + " -- should be 1");
});
});
}, function(e) {
console.log("ERROR: " + e.message);
});
});
}
NOTE: PRAGMA statements must be executed in executeSql() on the database object (i.e. db.executeSql()) and NOT within a transaction.
In this case, the same transaction in the first executeSql() callback is being reused to run executeSql() again.
// Wait for Cordova to load
document.addEventListener('deviceready', onDeviceReady, false);
// Cordova is ready
function onDeviceReady() {
var db = window.sqlitePlugin.openDatabase({name: 'my.db', location: 'default'});
db.transaction(function(tx) {
tx.executeSql('DROP TABLE IF EXISTS test_table');
tx.executeSql('CREATE TABLE IF NOT EXISTS test_table (id integer primary key, data text, data_num integer)');
tx.executeSql("INSERT INTO test_table (data, data_num) VALUES (?,?)", ["test", 100], function(tx, res) {
console.log("insertId: " + res.insertId + " -- probably 1");
console.log("rowsAffected: " + res.rowsAffected + " -- should be 1");
tx.executeSql("select count(id) as cnt from test_table;", [], function(tx, res) {
console.log("res.rows.length: " + res.rows.length + " -- should be 1");
console.log("res.rows.item(0).cnt: " + res.rows.item(0).cnt + " -- should be 1");
});
}, function(tx, e) {
console.log("ERROR: " + e.message);
});
});
}
This case will also works with Safari (WebKit), assuming you replace window.sqlitePlugin.openDatabase with window.openDatabase.
This will invalidate all handle access handle objects for the database that is closed:
db.close(successcb, errorcb);
It is OK to close the database within a transaction callback but NOT within a statement callback. The following example is OK:
db.transaction(function(tx) {
tx.executeSql("SELECT LENGTH('tenletters') AS stringlength", [], function(tx, res) {
console.log('got stringlength: ' + res.rows.item(0).stringlength);
});
}, function(error) {
// OK to close here:
console.log('transaction error: ' + error.message);
db.close();
}, function() {
// OK to close here:
console.log('transaction ok');
db.close(function() {
console.log('database is closed ok');
});
});
The following example is NOT OK:
// BROKEN:
db.transaction(function(tx) {
tx.executeSql("SELECT LENGTH('tenletters') AS stringlength", [], function(tx, res) {
console.log('got stringlength: ' + res.rows.item(0).stringlength);
// BROKEN - this will trigger the error callback:
db.close(function() {
console.log('database is closed ok');
}, function(error) {
console.log('ERROR closing database');
});
});
});
BUG: It is currently NOT possible to close a database in a db.executeSql callback. For example:
// BROKEN DUE TO BUG:
db.executeSql("SELECT LENGTH('tenletters') AS stringlength", [], function (res) {
var stringlength = res.rows.item(0).stringlength;
console.log('got stringlength: ' + res.rows.item(0).stringlength);
// BROKEN - this will trigger the error callback DUE TO BUG:
db.close(function() {
console.log('database is closed ok');
}, function(error) {
console.log('ERROR closing database');
});
});
SECOND BUG: When a database connection is closed, any queued transactions are left hanging. TODO: All pending transactions should be errored whenever a database connection is closed.
NOTE: As described above, if multiple database access handle objects are opened for the same database and one database handle access object is closed, the database is no longer available for the other database handle objects. Possible workarounds:
FUTURE TBD: dispose method on the database access handle object, such that a database is closed once all access handle objects are disposed.
window.sqlitePlugin.deleteDatabase({name: 'my.db', location: 'default'}, successcb, errorcb);
with location or iosDatabaseLocation parameter required as described above for openDatabase (affects iOS/macOS only)
BUG: When a database is deleted, any queued transactions for that database are left hanging. TODO: All pending transactions should be errored when a database is deleted.
The transactional nature of the API makes it relatively straightforward to manage a database schema that may be upgraded over time (adding new columns or new tables, for example). Here is the recommended procedure to follow upon app startup:
db.executeSql since it should be a very simple query)sqlite_master table as described at: http://stackoverflow.com/questions/1601151/how-do-i-check-in-sqlite-whether-a-table-exists)IMPORTANT: Since we cannot be certain when the users will actually update their apps, old schema versions will have to be supported for a very long time.
Tutorials with Ionic 2:
Sample for Ionic 2 wanted ref: litehelpers/Cordova-sqlite-storage#585
Tutorial with Ionic 1: https://blog.nraboy.com/2014/11/use-sqlite-instead-local-storage-ionic-framework/
A sample for Ionic 1 is provided at: litehelpers / Ionic-sqlite-database-example
Documentation at: http://ngcordova.com/docs/plugins/sqlite/
Other resource (apparently for Ionic 1): https://www.packtpub.com/books/content/how-use-sqlite-ionic-store-data
NOTE: Some Ionic and other Angular pitfalls are described above.
npm install -g cordova # (in case you don't have cordova)
cordova create MyProjectFolder com.my.project MyProject && cd MyProjectFolder # if you are just starting
cordova plugin add cordova-sqlite-storage # --save RECOMMENDED for Cordova CLI pre-7.0
cordova platform add <desired platform> # repeat for all desired platform(s)
cordova prepare # OPTIONAL (MAY BE NEEDED cordova-ios pre-4.3.0 (Cordova CLI pre-6.4.0))
Additional Cordova CLI NOTES:
cordova-plugin-whitelist with the --save flag to track these in config.xml (automatically saved in config.xml starting with Cordova CLI 7.0).platforms subdirectory tree in source code control (such as git). In case ALL plugins are tracked in config.xml (automatic starting with Cordova CLI 7.0, --save flag needed for Cordova CLI pre-7.0) then there is no need to keep the plugins subdirectory tree in source code control either.cordova prepare in case of cordova-ios older than 4.3.0 (Cordova CLI 6.4.0).cordova prepare.cordova prepare, you may have to remove the platform and add it again, such as:cordova platform rm ios
cordova platform add ios
or more drastically:
rm -rf platforms
cordova platform add ios
cordova-sqlite-storage - stable npm package versionThis plugin can be challenging to use on Windows since it includes a native SQLite3 library that is built as a part of the Cordova app. Here are some requirements:
windows-identity-name attribute (ref: http://phonegap.com/blog/2016/04/25/windows-10-and-phonegap-cli-6_1-now-on-build/);Use window.sqlitePlugin.echoTest and/or window.sqlitePlugin.selfTest as described above (please wait for the deviceready event).
Assuming your app has a recent template as used by the Cordova create script, add the following code to the onDeviceReady function, after app.receivedEvent('deviceready');:
window.sqlitePlugin.openDatabase({ name: 'hello-world.db', location: 'default' }, function (db) {
db.executeSql("select length('tenletters') as stringlength", [], function (res) {
var stringlength = res.rows.item(0).stringlength;
console.log('got stringlength: ' + stringlength);
document.getElementById('deviceready').querySelector('.received').innerHTML = 'stringlength: ' + stringlength;
});
});
Free support is provided on a best-effort basis and is only available in public forums. Please follow the steps below to be sure you have done your best before requesting help.
Professional support is available by contacting: sales@litehelpers.net
For more information: http://litehelpers.net/
First steps:
and check the following:
cordova.js.config.xml.If you still cannot get something to work:
General: As documented above with a negative example the application must wait for the AJAX query to finish before starting a transaction and adding the data elements.
In case of issues it is recommended to rework the reproduction program insert the data from a JavaScript object after a delay. There is already a test function for this in brodybits / cordova-sqlite-test-app.
FUTURE TBD examples
If you continue to see the issue: please make the simplest test program possible based on brodybits / cordova-sqlite-test-app to demonstrate the issue with the following characteristics:
It is recommended to make a small, self-contained test program based on brodybits / cordova-sqlite-test-app that can demonstrate your problem and post it. Please do not use any other plugins or frameworks than are absolutely necessary to demonstrate your problem.
In case of a problem with a pre-populated database, please post your entire project.
Please include the following:
Please include the information described above otherwise.
Unit testing is done in spec.
To run the tests from *nix shell, simply do either:
./bin/test.sh ios
or for Android:
./bin/test.sh android
To run from a windows powershell (here is a sample for android target):
.\bin\test.ps1 android
GENERAL: The adapters described here are community maintained.
Contributed by @Mikejo5000 (Mike Jones) from Microsoft.
The SQLite storage plugin sample allows you to execute SQL statements to interact with the database. The code snippets in this section demonstrate simple plugin tasks including:
Call the openDatabase() function to get started, passing in the name and location for the database.
var db = window.sqlitePlugin.openDatabase({ name: 'my.db', location: 'default' }, function (db) {
// Here, you might create or open the table.
}, function (error) {
console.log('Open database ERROR: ' + JSON.stringify(error));
});
Create a table with three columns for first name, last name, and a customer account number. If the table already exists, this SQL statement opens the table.
db.transaction(function (tx) {
// ...
tx.executeSql('CREATE TABLE customerAccounts (firstname, lastname, acctNo)');
}, function (error) {
console.log('transaction error: ' + error.message);
}, function () {
console.log('transaction ok');
});
By wrapping the previous executeSql() function call in db.transaction(), we will make these tasks asynchronous. If you want to, you can use multiple executeSql() statements within a single transaction (not shown).
Add a row to the database using the INSERT INTO SQL statement.
function addItem(first, last, acctNum) {
db.transaction(function (tx) {
var query = "INSERT INTO customerAccounts (firstname, lastname, acctNo) VALUES (?,?,?)";
tx.executeSql(query, [first, last, acctNum], function(tx, res) {
console.log("insertId: " + res.insertId + " -- probably 1");
console.log("rowsAffected: " + res.rowsAffected + " -- should be 1");
},
function(tx, error) {
console.log('INSERT error: ' + error.message);
});
}, function(error) {
console.log('transaction error: ' + error.message);
}, function() {
console.log('transaction ok');
});
}
To add some actual rows in your app, call the addItem function several times.
addItem("Fred", "Smith", 100);
addItem("Bob", "Yerunkle", 101);
addItem("Joe", "Auzomme", 102);
addItem("Pete", "Smith", 103);
Add code to read from the database using a SELECT statement. Include a WHERE condition to match the resultSet to the passed in last name.
function getData(last) {
db.transaction(function (tx) {
var query = "SELECT firstname, lastname, acctNo FROM customerAccounts WHERE lastname = ?";
tx.executeSql(query, [last], function (tx, resultSet) {
for(var x = 0; x < resultSet.rows.length; x++) {
console.log("First name: " + resultSet.rows.item(x).firstname +
", Acct: " + resultSet.rows.item(x).acctNo);
}
},
function (tx, error) {
console.log('SELECT error: ' + error.message);
});
}, function (error) {
console.log('transaction error: ' + error.message);
}, function () {
console.log('transaction ok');
});
}
Add a function to remove a row from the database that matches the passed in customer account number.
function removeItem(acctNum) {
db.transaction(function (tx) {
var query = "DELETE FROM customerAccounts WHERE acctNo = ?";
tx.executeSql(query, [acctNum], function (tx, res) {
console.log("removeId: " + res.insertId);
console.log("rowsAffected: " + res.rowsAffected);
},
function (tx, error) {
console.log('DELETE error: ' + error.message);
});
}, function (error) {
console.log('transaction error: ' + error.message);
}, function () {
console.log('transaction ok');
});
}
Add a function to update rows in the database for records that match the passed in customer account number. In this form, the statement will update multiple rows if the account numbers are not unique.
function updateItem(first, id) {
// UPDATE Cars SET Name='Skoda Octavia' WHERE Id=3;
db.transaction(function (tx) {
var query = "UPDATE customerAccounts SET firstname = ? WHERE acctNo = ?";
tx.executeSql(query, [first, id], function(tx, res) {
console.log("insertId: " + res.insertId);
console.log("rowsAffected: " + res.rowsAffected);
},
function(tx, error) {
console.log('UPDATE error: ' + error.message);
});
}, function(error) {
console.log('transaction error: ' + error.message);
}, function() {
console.log('transaction ok');
});
}
To call the preceding function, add code like this in your app.
updateItem("Yme", 102);
When you are finished with your transactions, close the database. Call closeDB within the transaction success or failure callbacks (rather than the callbacks for executeSql()).
function closeDB() {
db.close(function () {
console.log("DB closed!");
}, function (error) {
console.log("Error closing DB:" + error.message);
});
}
SQLitePlugin.coffee.md: platform-independent (Literate CoffeeScript, can be compiled with a recent CoffeeScript (1.x) compiler)www: platform-independent Javascript as generated from SQLitePlugin.coffee.md using coffeescript@1 (and committed!)src: platform-specific source codenode_modules: placeholder for external dependenciesscripts: installation hook script to fetch the external dependencies via npmspec: test suite using Jasmine (2.4.1)tests: very simple Jasmine test suite that is run on Circle CI (Android platform) and Travis CI (iOS platform) (used as a placeholder)WARNING: Please do NOT propose changes from your default branch. Contributions may be rebased using git rebase or git cherry-pick and not merged.
git mv to move files & directories;FAQs
Native interface to SQLite for PhoneGap / Cordova - cordova-sqlite-storage plugin version
The npm package cordova-sqlite-storage receives a total of 22,505 weekly downloads. As such, cordova-sqlite-storage popularity was classified as popular.
We found that cordova-sqlite-storage demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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