JSQLParser/JSqlParser
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Summary

Please visit the WebSite. JSqlParser is a RDBMS agnostic SQL statement parser. It translates SQL statements into a traversable hierarchy of Java classes (see Samples):

SELECT 1 FROM dual WHERE a = b
SQL Text
 └─Statements: statement.select.PlainSelect
    ├─selectItems: statement.select.SelectItem
    │  └─LongValue: 1
    ├─Table: dual
    └─where: expression.operators.relational.EqualsTo
       ├─Column: a
       └─Column: b
String sqlStr = "select 1 from dual where a=b";

PlainSelect select = (PlainSelect) CCJSqlParserUtil.parse(sqlStr);

SelectItem selectItem =
        select.getSelectItems().get(0);
Assertions.assertEquals(
        new LongValue(1)
        , selectItem.getExpression());

Table table = (Table) select.getFromItem();
Assertions.assertEquals("dual", table.getName());

EqualsTo equalsTo = (EqualsTo) select.getWhere();
Column a = (Column) equalsTo.getLeftExpression();
Column b = (Column) equalsTo.getRightExpression();
Assertions.assertEquals("a", a.getColumnName());
Assertions.assertEquals("b", b.getColumnName());
}

JSQLParser-4.9 is the last JDK8 compatible version and any future development will depend on JDK11.

JSqlParser aims to support the SQL standard as well as all major RDBMS. Any missing syntax or features can be added on demand.

RDBMS Statements
Oracle
MS SQL Server and Sybase
Postgres
MySQL and MariaDB
DB2
H2 and HSQLDB and Derby
SQLite
SELECT
INSERT, UPDATE, UPSERT, MERGE
DELETE, TRUNCATE TABLE
CREATE ..., ALTER ...., DROP ...
WITH ...
Salesforce SOQL INCLUDES, EXCLUDES

JSqlParser can also be used to create SQL Statements from Java Code with a fluent API (see Samples).

Alternatives to JSqlParser?

General SQL Parser looks pretty good, with extended SQL syntax (like PL/SQL and T-SQL) and java + .NET APIs. The tool is commercial (license available online), with a free download option.

Alternatively the dual-licensed JOOQ provides a hand-written Parser supporting a lot of RDBMS, translation between dialects, SQL transformation, can be used as a JDBC proxy for translation and transformation purposes.

  1. Samples
  2. Build Instructions and Maven Artifact
  3. Contribution
  4. Change Log
  5. Issues

License

JSqlParser is dual licensed under LGPL V2.1 or Apache Software License, Version 2.0.

关于
JSqlParser parses an SQL statement and translate it into a hierarchy of Java classes. The generated hierarchy can be navigated using the Visitor Pattern
最后更新于  11 hours ago