Package org.apache.ignite.internal.processors.query.h2.affinity

Class PartitionExtractor

java.lang.Object

org.apache.ignite.internal.processors.query.h2.affinity.PartitionExtractor

public class PartitionExtractor
extends Object

Partition tree extractor.

Constructor Summary

Constructors

Constructor	Description
PartitionExtractor(H2PartitionResolver partResolver, GridKernalContext ctx)	Constructor.

Method Summary

Modifier and Type	Method	Description
PartitionResult	extract(GridSqlQuery qry)	Extract partitions.
PartitionResult	mergeMapQueries(List<GridCacheSqlQuery> qrys)	Merge partition info from multiple queries.
static @Nullable GridSqlColumn	unwrapColumn(GridSqlAst ast)	Unwrap column if possible.
static @Nullable GridSqlConst	unwrapConst(GridSqlAst ast)	Unwrap constant if possible.

Methods inherited from class java.lang.Object

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

Constructor Detail

PartitionExtractor

public PartitionExtractor(H2PartitionResolver partResolver,
                          GridKernalContext ctx)

Constructor.

Parameters:

partResolver - Partition resolver.

ctx - Grid kernal context.

Method Detail

extract

public PartitionResult extract(GridSqlQuery qry)
                        throws IgniteCheckedException

Extract partitions.

Parameters:

qry - Query.

Returns:

Partitions.

Throws:

IgniteCheckedException

mergeMapQueries

public PartitionResult mergeMapQueries(List<GridCacheSqlQuery> qrys)

Merge partition info from multiple queries.

Parameters:

qrys - Queries.

Returns:

Partition result or null if nothing is resolved.

unwrapConst

@Nullable
public static @Nullable GridSqlConst unwrapConst(GridSqlAst ast)

Unwrap constant if possible.

Parameters:

ast - AST.

Returns:

Constant or null if not a constant.

unwrapColumn

@Nullable
public static @Nullable GridSqlColumn unwrapColumn(GridSqlAst ast)

Unwrap column if possible.

Parameters:

ast - AST.

Returns:

Column or null if not a column.