org.apache.shardingsphere.core.rewrite

Class SQLRewriteEngine

java.lang.Object

org.apache.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, panjuan

Constructor Summary

Constructors

Constructor and Description
SQLRewriteEngine(org.apache.shardingsphere.core.rule.ShardingRule shardingRule, String originalSQL, org.apache.shardingsphere.core.constant.DatabaseType databaseType, SQLRouteResult sqlRouteResult, List<Object> parameters, org.apache.shardingsphere.core.optimize.result.OptimizeResult optimizeResult) Constructs SQL rewrite engine.

Method Summary

Modifier and Type	Method and Description
SQLUnit	generateSQL(TableUnit tableUnit, SQLBuilder sqlBuilder, org.apache.shardingsphere.core.metadata.datasource.ShardingDataSourceMetaData shardingDataSourceMetaData) Generate SQL string.
SQLBuilder	rewrite(boolean isSingleRouting) 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(org.apache.shardingsphere.core.rule.ShardingRule shardingRule,
                        String originalSQL,
                        org.apache.shardingsphere.core.constant.DatabaseType databaseType,
                        SQLRouteResult sqlRouteResult,
                        List<Object> parameters,
                        org.apache.shardingsphere.core.optimize.result.OptimizeResult optimizeResult)

Constructs SQL rewrite engine.

Parameters:

shardingRule - databases and tables sharding rule

originalSQL - original SQL

databaseType - database type

sqlRouteResult - SQL route result

parameters - parameters

Method Detail

rewrite

public SQLBuilder rewrite(boolean isSingleRouting)

rewrite SQL.

Parameters:

isSingleRouting - is rewrite

Returns:

SQL builder

generateSQL

public SQLUnit generateSQL(TableUnit tableUnit,
                           SQLBuilder sqlBuilder,
                           org.apache.shardingsphere.core.metadata.datasource.ShardingDataSourceMetaData shardingDataSourceMetaData)

Generate SQL string.

Parameters:

tableUnit - route table unit

sqlBuilder - SQL builder

shardingDataSourceMetaData - sharding data source meta data

Returns:

SQL unit