LhxJoinExecStreamParams Struct Reference

LhxJoinExecStream matches two input streams by using a hash table built from one of the inputs(usually the smaller input). More...

#include <LhxJoinExecStream.h>

Inheritance diagram for LhxJoinExecStreamParams:

List of all members.


Public Attributes
SharedSegment	pTempSegment
	Segment to use for storing partition pages.
bool	enableSubPartStat
	whether to use sub partition stats.
uint	forcePartitionLevel
	This parameter is used only in tests.
RecordNum	cndKeys
	Initial stats provided by the optimizer for resource allocation.
RecordNum	numRows
	numRows: number of rows from the build input.
bool	leftInner
	Return matching rows from the left.
bool	leftOuter
	Return non-matching rows from the left.
bool	rightInner
	Return matching rows from the right.
bool	rightOuter
	Return non-matching rows from the right.
TupleProjection	leftKeyProj
	Join keys from the left input.
TupleProjection	rightKeyProj
	Join keys from the right input.
TupleProjection	filterNullKeyProj
	Join keys from the right input.
TupleProjection	outputProj
	Projection from the join.
bool	setopDistinct
	These two fields combined denote the join semantics setDistinct setAll JoinSementics false false regular join false true setop ALL (not implemented) true false setop DISTINCT true true invalid combination.
bool	setopAll
bool	enableJoinFilter
	Whether to use join filters.
bool	enableSwing
	Whether to use swing based on input sizes.

Detailed Description

LhxJoinExecStream matches two input streams by using a hash table built from one of the inputs(usually the smaller input).

Author:: Rushan Chen

Version:

Id: //open/dev/fennel/hashexe/LhxJoinExecStream.h#2

Definition at line 42 of file LhxJoinExecStream.h.

Member Data Documentation

SharedSegment LhxJoinExecStreamParams::pTempSegment

Segment to use for storing partition pages.

Definition at line 47 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setHashInfo(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

bool LhxJoinExecStreamParams::enableSubPartStat

whether to use sub partition stats.

Definition at line 52 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::prepare(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

uint LhxJoinExecStreamParams::forcePartitionLevel

This parameter is used only in tests.

Force partitioning level.

Definition at line 58 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::prepare(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

RecordNum LhxJoinExecStreamParams::cndKeys

Initial stats provided by the optimizer for resource allocation.

cndKeys: key cardinality of the initial built input chosen by the optimizer. For Hash Aggregate, this is the estimated number of groups. If MAXU, the stat is unknown.

Definition at line 69 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setHashInfo(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

RecordNum LhxJoinExecStreamParams::numRows

numRows: number of rows from the build input.

If MAXU, unknown.

Definition at line 74 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setHashInfo(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

bool LhxJoinExecStreamParams::leftInner

Return matching rows from the left.

Definition at line 79 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setJoinType(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

bool LhxJoinExecStreamParams::leftOuter

Return non-matching rows from the left.

Definition at line 84 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setJoinType(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

bool LhxJoinExecStreamParams::rightInner

Return matching rows from the right.

Definition at line 89 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setJoinType(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

bool LhxJoinExecStreamParams::rightOuter

Return non-matching rows from the right.

Definition at line 94 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setJoinType(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

TupleProjection LhxJoinExecStreamParams::leftKeyProj

Join keys from the left input.

Definition at line 99 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::prepare(), LhxJoinExecStream::setHashInfo(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

TupleProjection LhxJoinExecStreamParams::rightKeyProj

Join keys from the right input.

Definition at line 104 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::prepare(), LhxJoinExecStream::setHashInfo(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

TupleProjection LhxJoinExecStreamParams::filterNullKeyProj

Join keys from the right input.

Definition at line 109 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setHashInfo(), and ExecStreamFactory::visit().

TupleProjection LhxJoinExecStreamParams::outputProj

Projection from the join.

If empty then produce all input columns from both join sides.

Definition at line 115 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::prepare(), and LhxJoinExecStreamTest::testImpl().

bool LhxJoinExecStreamParams::setopDistinct

These two fields combined denote the join semantics setDistinct setAll JoinSementics false false regular join false true setop ALL (not implemented) true false setop DISTINCT true true invalid combination.

Definition at line 125 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setJoinType(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

bool LhxJoinExecStreamParams::setopAll

Definition at line 126 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setJoinType(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

bool LhxJoinExecStreamParams::enableJoinFilter

Whether to use join filters.

Definition at line 131 of file LhxJoinExecStream.h.

Referenced by LhxJoinExecStream::setHashInfo(), LhxJoinExecStreamTest::testImpl(), and ExecStreamFactory::visit().

bool LhxJoinExecStreamParams::enableSwing

Whether to use swing based on input sizes.

Definition at line 136 of file LhxJoinExecStream.h.