org.apache.kylin.query.relnode

Class OLAPProjectRel

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.core.Project

org.apache.kylin.query.relnode.OLAPProjectRel

All Implemented Interfaces:

Cloneable, org.apache.calcite.plan.RelOptNode, org.apache.calcite.rel.RelNode, OLAPRel

public class OLAPProjectRel
extends org.apache.calcite.rel.core.Project
implements OLAPRel

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.rel.core.Project

org.apache.calcite.rel.core.Project.Flags

Nested classes/interfaces inherited from interface org.apache.kylin.query.relnode.OLAPRel

OLAPRel.JavaImplementor, OLAPRel.OLAPImplementor, OLAPRel.RewriteImplementor

Nested classes/interfaces inherited from interface org.apache.calcite.rel.RelNode

org.apache.calcite.rel.RelNode.Context

Field Summary

Fields

Modifier and Type	Field and Description
List<org.apache.calcite.rex.RexNode>	rewriteProjects

Fields inherited from class org.apache.calcite.rel.core.Project

exps

Fields inherited from class org.apache.calcite.rel.SingleRel

input

Fields inherited from class org.apache.calcite.rel.AbstractRelNode

digest, id, rowType, traitSet

Fields inherited from interface org.apache.kylin.query.relnode.OLAPRel

CONVENTION, logger

Constructor Summary

Constructors

Constructor and Description
OLAPProjectRel(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelTraitSet traitSet, org.apache.calcite.rel.RelNode child, List<org.apache.calcite.rex.RexNode> exps, org.apache.calcite.rel.type.RelDataType rowType)

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.calcite.plan.RelOptCost	computeSelfCost(org.apache.calcite.plan.RelOptPlanner planner, org.apache.calcite.rel.metadata.RelMetadataQuery mq) Since the project under aggregate maybe reduce expressions by AggregateProjectReduceRule, consider the count of expressions into cost, the reduced project will be used.
org.apache.calcite.rel.core.Project	copy(org.apache.calcite.plan.RelTraitSet traitSet, org.apache.calcite.rel.RelNode child, List<org.apache.calcite.rex.RexNode> exps, org.apache.calcite.rel.type.RelDataType rowType)
org.apache.calcite.rel.RelWriter	explainTerms(org.apache.calcite.rel.RelWriter pw)
List<org.apache.calcite.rex.RexNode>	getChildExps()
ColumnRowType	getColumnRowType() get the row type of ColumnDesc
OLAPContext	getContext() get olap context
List<org.apache.calcite.rex.RexNode>	getProjects()
boolean	hasSubQuery() whether has sub query
EnumerableRel	implementEnumerable(List<EnumerableRel> inputs)
void	implementOLAP(OLAPRel.OLAPImplementor implementor)
void	implementRewrite(OLAPRel.RewriteImplementor implementor)
boolean	isMerelyPermutation()
org.apache.calcite.plan.RelTraitSet	replaceTraitSet(org.apache.calcite.plan.RelTrait trait) replace RelTraitSet

Methods inherited from class org.apache.calcite.rel.core.Project

accept, copy, copy, getFlags, getMapping, getMapping, getNamedProjects, getPartialMapping, getPermutation, getPermutation, isBoxed, isMapping, isValid

Methods inherited from class org.apache.calcite.rel.SingleRel

childrenAccept, deriveRowType, estimateRowCount, getInput, getInputs, replaceInput

Methods inherited from class org.apache.calcite.rel.AbstractRelNode

accept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, metadata, onRegister, recomputeDigest, register, sole, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.rel.RelNode

accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, copy, estimateRowCount, explain, getCollationList, getConvention, getCorrelVariable, getExpectedInputRowType, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getTable, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, register, replaceInput

Methods inherited from interface org.apache.calcite.plan.RelOptNode

getCluster, getDescription, getDigest, getId, getTraitSet

Field Detail

rewriteProjects

public List<org.apache.calcite.rex.RexNode> rewriteProjects

Constructor Detail

OLAPProjectRel

public OLAPProjectRel(org.apache.calcite.plan.RelOptCluster cluster,
              org.apache.calcite.plan.RelTraitSet traitSet,
              org.apache.calcite.rel.RelNode child,
              List<org.apache.calcite.rex.RexNode> exps,
              org.apache.calcite.rel.type.RelDataType rowType)

Method Detail

getChildExps

public List<org.apache.calcite.rex.RexNode> getChildExps()

Specified by:

getChildExps in interface org.apache.calcite.rel.RelNode

Overrides:

getChildExps in class org.apache.calcite.rel.core.Project

getProjects

public List<org.apache.calcite.rex.RexNode> getProjects()

Overrides:

getProjects in class org.apache.calcite.rel.core.Project

computeSelfCost

public org.apache.calcite.plan.RelOptCost computeSelfCost(org.apache.calcite.plan.RelOptPlanner planner,
                                                 org.apache.calcite.rel.metadata.RelMetadataQuery mq)

Since the project under aggregate maybe reduce expressions by AggregateProjectReduceRule, consider the count of expressions into cost, the reduced project will be used. Made RexOver much more expensive so we can transform into OLAPWindowRel by rules in ProjectToWindowRule

Specified by:

computeSelfCost in interface org.apache.calcite.rel.RelNode

Overrides:

computeSelfCost in class org.apache.calcite.rel.core.Project

copy

public org.apache.calcite.rel.core.Project copy(org.apache.calcite.plan.RelTraitSet traitSet,
                                       org.apache.calcite.rel.RelNode child,
                                       List<org.apache.calcite.rex.RexNode> exps,
                                       org.apache.calcite.rel.type.RelDataType rowType)

Specified by:

copy in class org.apache.calcite.rel.core.Project

implementOLAP

public void implementOLAP(OLAPRel.OLAPImplementor implementor)

Specified by:

implementOLAP in interface OLAPRel

implementEnumerable

public EnumerableRel implementEnumerable(List<EnumerableRel> inputs)

Specified by:

implementEnumerable in interface OLAPRel

getColumnRowType

public ColumnRowType getColumnRowType()

Description copied from interface: OLAPRel

get the row type of ColumnDesc

Specified by:

getColumnRowType in interface OLAPRel

Returns:

implementRewrite

public void implementRewrite(OLAPRel.RewriteImplementor implementor)

Specified by:

implementRewrite in interface OLAPRel

getContext

public OLAPContext getContext()

Description copied from interface: OLAPRel

get olap context

Specified by:

getContext in interface OLAPRel

hasSubQuery

public boolean hasSubQuery()

Description copied from interface: OLAPRel

whether has sub query

Specified by:

hasSubQuery in interface OLAPRel

replaceTraitSet

public org.apache.calcite.plan.RelTraitSet replaceTraitSet(org.apache.calcite.plan.RelTrait trait)

Description copied from interface: OLAPRel

replace RelTraitSet

Specified by:

replaceTraitSet in interface OLAPRel

isMerelyPermutation

public boolean isMerelyPermutation()

explainTerms

public org.apache.calcite.rel.RelWriter explainTerms(org.apache.calcite.rel.RelWriter pw)

Overrides:

explainTerms in class org.apache.calcite.rel.core.Project