@getclarify/node-sql-parser
v5.3.4
Published
simple node sql parser
Downloads
8,229
Readme
Nodejs SQL Parser
Parse simple SQL statements into an abstract syntax tree (AST) with the visited tableList, columnList and convert it back to SQL.
:star: Features
- support multiple sql statement seperate by semicolon
- support select, delete, update and insert type
- support drop, truncate and rename command
- output the table and column list that the sql visited with the corresponding authority
- support various databases engine
:tada: Install
From npmjs
npm install node-sql-parser --save
or
yarn add node-sql-parser
From GitHub Package Registry
npm install @taozhi8833998/node-sql-parser --registry=https://npm.pkg.github.com/
From Browser
Import the JS file in your page:
// support all database parser, but file size is about 750K
<script src="https://unpkg.com/node-sql-parser/umd/index.umd.js"></script>
// or you can import specified database parser only, it's about 150K
<script src="https://unpkg.com/node-sql-parser/umd/mysql.umd.js"></script>
<script src="https://unpkg.com/node-sql-parser/umd/postgresql.umd.js"></script>
NodeSQLParser
object is onwindow
<!DOCTYPE html>
<html lang="en" >
<head>
<title>node-sql-parser</title>
<meta charset="utf-8" />
</head>
<body>
<p><em>Check console to see the output</em></p>
<script src="https://unpkg.com/node-sql-parser/umd/mysql.umd.js"></script>
<script>
window.onload = function () {
// Example parser
const parser = new NodeSQLParser.Parser()
const ast = parser.astify("select id, name from students where age < 18")
console.log(ast)
const sql = parser.sqlify(ast)
console.log(sql)
}
</script>
</body>
</html>
:rocket: Usage
Supported Database SQL Syntax
- Athena
- BigQuery
- DB2
- Hive
- MariaDB
- MySQL
- PostgresQL
- Redshift
- Sqlite
- TransactSQL
- FlinkSQL
- Snowflake(alpha)
- Noql
- New issue could be made for other new database.
Create AST for SQL statement
// import Parser for all databases
const { Parser } = require('node-sql-parser');
const parser = new Parser();
const ast = parser.astify('SELECT * FROM t'); // mysql sql grammer parsed by default
console.log(ast);
ast
forSELECT * FROM t
{
"with": null,
"type": "select",
"options": null,
"distinct": null,
"columns": "*",
"from": [
{
"db": null,
"table": "t",
"as": null
}
],
"where": null,
"groupby": null,
"having": null,
"orderby": null,
"limit": null
}
Get node location in the AST
const { Parser } = require('node-sql-parser');
const parser = new Parser();
const ast = parser.astify('SELECT * FROM t', { parseOptions: { includeLocations: true } });
console.log(ast);
ast
forSELECT * FROM t
with theloc
property indicating locations and ranges
{
"with": null,
"type": "select",
"options": null,
"distinct": null,
"columns": [
{
"expr": {
"type": "column_ref",
"table": null,
"column": "*"
},
"as": null,
"loc": {
"start": {
"offset": 7,
"line": 1,
"column": 8
},
"end": {
"offset": 8,
"line": 1,
"column": 9
}
}
}
],
"into": {
"position": null
},
"from": [
{
"db": null,
"table": "t",
"as": null,
"loc": {
"start": {
"offset": 14,
"line": 1,
"column": 15
},
"end": {
"offset": 15,
"line": 1,
"column": 16
}
}
}
],
"where": null,
"groupby": null,
"having": null,
"orderby": null,
"limit": null,
"locking_read": null,
"window": null,
"loc": {
"start": {
"offset": 0,
"line": 1,
"column": 1
},
"end": {
"offset": 15,
"line": 1,
"column": 16
}
}
}
Convert AST back to SQL
const opt = {
database: 'MySQL' // MySQL is the default database
}
// import mysql parser only
const { Parser } = require('node-sql-parser');
const parser = new Parser()
// opt is optional
const ast = parser.astify('SELECT * FROM t', opt);
const sql = parser.sqlify(ast, opt);
console.log(sql); // SELECT * FROM `t`
Parse specified Database
There two ways to parser the specified database.
import Parser from the specified database path node-sql-parser/build/{database}
// import transactsql parser only
const { Parser } = require('node-sql-parser/build/transactsql')
const parser = new Parser()
const sql = `SELECT id FROM test AS result`
const ast = parser.astify(sql)
console.log(parser.sqlify(ast)) // SELECT [id] FROM [test] AS [result]
OR you can pass a options object to the parser, and specify the database property.
const opt = {
database: 'Postgresql'
}
// import all databases parser
const { Parser } = require('node-sql-parser')
const parser = new Parser()
// pass the opt config to the corresponding methods
const ast = parser.astify('SELECT * FROM t', opt)
const sql = parser.sqlify(ast, opt)
console.log(sql); // SELECT * FROM "t"
Get TableList, ColumnList, Ast by parse
function
const opt = {
database: 'MariaDB' // MySQL is the default database
}
const { Parser } = require('node-sql-parser/build/mariadb');
const parser = new Parser()
// opt is optional
const { tableList, columnList, ast } = parser.parse('SELECT * FROM t', opt);
Get the SQL visited tables
- get the table list that the sql visited
- the format is {type}::{dbName}::{tableName} // type could be select, update, delete or insert
const opt = {
database: 'MySQL'
}
const { Parser } = require('node-sql-parser/build/mysql');
const parser = new Parser();
// opt is optional
const tableList = parser.tableList('SELECT * FROM t', opt);
console.log(tableList); // ["select::null::t"]
Get the SQL visited columns
- get the column list that the sql visited
- the format is {type}::{tableName}::{columnName} // type could be select, update, delete or insert
- for
select *
,delete
andinsert into tableName values()
without specified columns, the.*
column authority regex is required
const opt = {
database: 'MySQL'
}
const { Parser } = require('node-sql-parser/build/mysql');
const parser = new Parser();
// opt is optional
const columnList = parser.columnList('SELECT t.id FROM t', opt);
console.log(columnList); // ["select::t::id"]
Check the SQL with Authority List
- check table authority
whiteListCheck
function check ontable
mode andMySQL
database by default
const { Parser } = require('node-sql-parser');
const parser = new Parser();
const sql = 'UPDATE a SET id = 1 WHERE name IN (SELECT name FROM b)'
const whiteTableList = ['(select|update)::(.*)::(a|b)'] // array that contain multiple authorities
const opt = {
database: 'MySQL',
type: 'table',
}
// opt is optional
parser.whiteListCheck(sql, whiteTableList, opt) // if check failed, an error would be thrown with relevant error message, if passed it would return undefined
- check column authority
const { Parser } = require('node-sql-parser');
const parser = new Parser();
const sql = 'UPDATE a SET id = 1 WHERE name IN (SELECT name FROM b)'
const whiteColumnList = ['select::null::name', 'update::a::id'] // array that contain multiple authorities
const opt = {
database: 'MySQL',
type: 'column',
}
// opt is optional
parser.whiteListCheck(sql, whiteColumnList, opt) // if check failed, an error would be thrown with relevant error message, if passed it would return undefined
:kissing_heart: Acknowledgement
This project is inspired by the SQL parser flora-sql-parser module.
License
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