org.apache.ignite.internal.processors.query.h2.sql

Class GridSqlQuerySplitter

java.lang.Object

org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter

public class GridSqlQuerySplitter
extends Object

Splits a single SQL query into two step map-reduce query.

Constructor Summary

Constructors

Constructor and Description
GridSqlQuerySplitter(Object[] params, boolean collocatedGrpBy, GridKernalContext ctx)

Method Summary

Modifier and Type	Method and Description
static String	mergeTableIdentifier(int idx)
static GridCacheTwoStepQuery	split(Connection conn, org.h2.command.Prepared prepared, Object[] params, boolean collocatedGrpBy, boolean distributedJoins, boolean enforceJoinOrder, IgniteH2Indexing h2)

Methods inherited from class java.lang.Object

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

Constructor Detail

GridSqlQuerySplitter

public GridSqlQuerySplitter(Object[] params,
                            boolean collocatedGrpBy,
                            GridKernalContext ctx)

Parameters:

params - Query parameters.

collocatedGrpBy - If it is a collocated GROUP BY query.

Method Detail

mergeTableIdentifier

public static String mergeTableIdentifier(int idx)

Parameters:

idx - Table index.

Returns:

Merge table name.

split

public static GridCacheTwoStepQuery split(Connection conn,
                                          org.h2.command.Prepared prepared,
                                          Object[] params,
                                          boolean collocatedGrpBy,
                                          boolean distributedJoins,
                                          boolean enforceJoinOrder,
                                          IgniteH2Indexing h2)
                                   throws SQLException,
                                          IgniteCheckedException

Parameters:

conn - Connection.

prepared - Prepared.

params - Parameters.

collocatedGrpBy - Whether the query has collocated GROUP BY keys.

distributedJoins - If distributed joins enabled.

enforceJoinOrder - Enforce join order.

h2 - Indexing.

Returns:

Two step query.

Throws:

SQLException - If failed.

IgniteCheckedException - If failed.