io.shardingsphere.core.rewrite

Class SQLRewriteEngine

java.lang.Object

io.shardingsphere.core.rewrite.SQLRewriteEngine

public final class SQLRewriteEngine
extends Object

SQL rewrite engine.

Rewrite logic SQL to actual SQL, should rewrite table name and optimize something.

Author:

zhangliang, maxiaoguang

Constructor Summary

Constructors

Constructor and Description
SQLRewriteEngine(ShardingRule shardingRule, String originalSQL, DatabaseType databaseType, SQLStatement sqlStatement, ShardingConditions shardingConditions, List<Object> parameters) Constructs SQL rewrite engine.

Method Summary

Modifier and Type	Method and Description
SQLUnit	generateSQL(TableUnit tableUnit, SQLBuilder sqlBuilder) Generate SQL string.
SQLBuilder	rewrite(boolean isRewriteLimit) rewrite SQL.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SQLRewriteEngine

public SQLRewriteEngine(ShardingRule shardingRule,
                        String originalSQL,
                        DatabaseType databaseType,
                        SQLStatement sqlStatement,
                        ShardingConditions shardingConditions,
                        List<Object> parameters)

Constructs SQL rewrite engine.

Parameters:

shardingRule - databases and tables sharding rule

originalSQL - original SQL

databaseType - database type

sqlStatement - SQL statement

shardingConditions - sharding conditions

parameters - parameters

Method Detail

rewrite

public SQLBuilder rewrite(boolean isRewriteLimit)

rewrite SQL.

Parameters:

isRewriteLimit - is rewrite limit

Returns:

SQL builder

generateSQL

public SQLUnit generateSQL(TableUnit tableUnit,
                           SQLBuilder sqlBuilder)

Generate SQL string.

Parameters:

tableUnit - route table unit

sqlBuilder - SQL builder

Returns:

SQL unit