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dt-sql-parser

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dt-sql-parser

sql,hive,parser

  • 1.1.9
  • Source
  • npm
  • Socket score

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dt-sql-parser

本项目用于处理sql,目前含有功能

  1. 解析sql生成语法树(不支持CREATE等语句,具体可以查看core/astParser文件),支持单条sql语句
  2. 校验sql,hive sql,impala sql等语法,并给予错误信息与建议提示
  3. sql分割,根据;将sql分割为数组
  4. 去除sql中的的注释(目前支持--,/**/类型注释)

用法

过滤注释 / sql分割

const dtFilter=require("dt-sql-parser").filter;
const sql=`
/*sttttttttart*/create table /*hhhhhhhh
hhhhhh
aaaaaa*/ sql_task_comment_test(id int comment 'id') comment 'sql test';
    --eeeeeeeend
`
console.log(dtFilter.filterComments(sql))//过滤注释
console.log(dtFilter.splitSql(sql));//分割sql

生成ast树

const dtFilter=require("dt-sql-parser").parser;
const sql=`
/*sttttttttart*/select userId as id,name /*hhhhhhhh
hhhhhh
aaaaaa*/ from user where isDeleted=0
    --eeeeeeeend
`
console.log(dtFilter.parse(sql))//注意,目前只支持单条sql语句,所以需要自己调用sql分割一条一条处理!

校验hive sql语法

const dtSqlParser=require("dt-sql-parser").parser;

console.log(dtSqlParser.parseSyntax("selet  * form",'hive'));

/*
{
  "text": "selet",//错误部分
  "token": "REGULAR_IDENTIFIER",//类型
  "line": 0,
  "loc": {//错误位置信息
    "first_line": 1,
    "last_line": 1,
    "first_column": 0,
    "last_column": 5
  },
  "ruleId": "0",
  "expected": [//建议输入内容
    {
      "text": "select",//建议内容
      "distance": 1//建议优先级
    },
    {
      "text": "delete",
      "distance": 2
    }
  ],
  "recoverable": false,
  "incompleteStatement": true
}
*/

API

filter

function filterComments(sql:string):string

过滤sql注释(支持/*和--)

function splitSql(sql:string):Array

自动去除注释,并且提取出各个sql

parser

function parseSyntax(sql:string|Array, type?:string):Object|boolean

校验sql语法,如果没错误,则返回false,否则返回错误详细信息

可以提供一个含有两个字符串的数组,代表被光标分割的两个sql片段

function parserSql(sql:string|Array, type?:string):Object

解析sql语法,根据上下文提示补全字段与其它辅助信息

可以提供一个含有两个字符串的数组,代表被光标分割的两个sql片段


ast生成代码来自nquery

hive,impala等语法解析文件来自Hue


ChangeLog

  • 1.1.8 添加转义字符支持

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Package last updated on 10 Dec 2018

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