org.apache.hadoop.hive.ql.optimizer.calcite.reloperators

Class HiveProject

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.core.Project

org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveProject

All Implemented Interfaces:

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

public class HiveProject
extends org.apache.calcite.rel.core.Project
implements HiveRelNode

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.hadoop.hive.ql.optimizer.calcite.reloperators.HiveRelNode

HiveRelNode.Implementor

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.calcite.rel.core.RelFactories.ProjectFactory	DEFAULT_PROJECT_FACTORY

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

exps

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

digest, id, rowType, traitSet

Fields inherited from interface org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveRelNode

CONVENTION

Constructor Summary

Constructors

Constructor and Description
HiveProject(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelTraitSet traitSet, org.apache.calcite.rel.RelNode child, List<? extends org.apache.calcite.rex.RexNode> exps, org.apache.calcite.rel.type.RelDataType rowType, int flags) Creates a HiveProject.

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.core.Project	copy(org.apache.calcite.plan.RelTraitSet traitSet, org.apache.calcite.rel.RelNode input, List<org.apache.calcite.rex.RexNode> exps, org.apache.calcite.rel.type.RelDataType rowType)
static HiveProject	create(org.apache.calcite.rel.RelNode child, List<? extends org.apache.calcite.rex.RexNode> exps, List<String> fieldNames) Creates a HiveProject with no sort keys.
static HiveProject	create(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.rel.RelNode child, List<? extends org.apache.calcite.rex.RexNode> exps, org.apache.calcite.rel.type.RelDataType rowType, List<org.apache.calcite.rel.RelCollation> collationList) Creates a HiveProject.
static HiveProject	create(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.rel.RelNode child, List<? extends org.apache.calcite.rex.RexNode> exps, org.apache.calcite.rel.type.RelDataType rowType, org.apache.calcite.plan.RelTraitSet traitSet, List<org.apache.calcite.rel.RelCollation> collationList) Creates a HiveProject.
List<Integer>	getVirtualCols()
void	implement(HiveRelNode.Implementor implementor)
static org.apache.calcite.rel.RelNode	projectMapping(org.apache.calcite.rel.RelNode rel, org.apache.calcite.util.mapping.Mapping mapping, List<String> fieldNames) Creates a relational expression which projects the output fields of a relational expression according to a partial mapping.

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

accept, copy, copy, explainTerms, getChildExps, getFlags, getMapping, getMapping, getNamedProjects, getPartialMapping, getPermutation, getPermutation, getProjects, isBoxed, isMapping, isValid

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

childrenAccept, deriveRowType, getInput, getInputs, getRows, replaceInput

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

accept, collectVariablesSet, collectVariablesUsed, computeDigest, explain, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRowType, getTable, getTraitSet, getVariablesStopped, isDistinct, isKey, 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, copy, explain, getChildExps, getCollationList, getConvention, getCorrelVariable, getExpectedInputRowType, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getTable, getVariablesStopped, isDistinct, isKey, isValid, metadata, onRegister, recomputeDigest, register, replaceInput

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

getCluster, getDescription, getDigest, getId, getTraitSet

Field Detail

DEFAULT_PROJECT_FACTORY

public static final org.apache.calcite.rel.core.RelFactories.ProjectFactory DEFAULT_PROJECT_FACTORY

Constructor Detail

HiveProject

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

Creates a HiveProject.

Parameters:

cluster - Cluster this relational expression belongs to

child - input relational expression

exps - List of expressions for the input columns

rowType - output row type

flags - values as in Project.Flags

Method Detail

create

public static HiveProject create(org.apache.calcite.rel.RelNode child,
                 List<? extends org.apache.calcite.rex.RexNode> exps,
                 List<String> fieldNames)
                          throws CalciteSemanticException

Creates a HiveProject with no sort keys.

Parameters:

child - input relational expression

exps - set of expressions for the input columns

fieldNames - aliases of the expressions

Throws:

CalciteSemanticException

create

public static HiveProject create(org.apache.calcite.plan.RelOptCluster cluster,
                 org.apache.calcite.rel.RelNode child,
                 List<? extends org.apache.calcite.rex.RexNode> exps,
                 org.apache.calcite.rel.type.RelDataType rowType,
                 List<org.apache.calcite.rel.RelCollation> collationList)

Creates a HiveProject.

create

public static HiveProject create(org.apache.calcite.plan.RelOptCluster cluster,
                 org.apache.calcite.rel.RelNode child,
                 List<? extends org.apache.calcite.rex.RexNode> exps,
                 org.apache.calcite.rel.type.RelDataType rowType,
                 org.apache.calcite.plan.RelTraitSet traitSet,
                 List<org.apache.calcite.rel.RelCollation> collationList)

Creates a HiveProject.

projectMapping

public static org.apache.calcite.rel.RelNode projectMapping(org.apache.calcite.rel.RelNode rel,
                                            org.apache.calcite.util.mapping.Mapping mapping,
                                            List<String> fieldNames)
                                                     throws CalciteSemanticException

Creates a relational expression which projects the output fields of a relational expression according to a partial mapping.

A partial mapping is weaker than a permutation: every target has one source, but a source may have 0, 1 or more than one targets. Usually the result will have fewer fields than the source, unless some source fields are projected multiple times.

This method could optimize the result as #permute does, but does not at present.

Parameters:

rel - Relational expression

mapping - Mapping from source fields to target fields. The mapping type must obey the constraints MappingType.isMandatorySource() and MappingType.isSingleSource(), as does MappingType.INVERSE_FUNCTION.

fieldNames - Field names; if null, or if a particular entry is null, the name of the permuted field is used

Returns:

relational expression which projects a subset of the input fields

Throws:

CalciteSemanticException

copy

public org.apache.calcite.rel.core.Project copy(org.apache.calcite.plan.RelTraitSet traitSet,
                                       org.apache.calcite.rel.RelNode input,
                                       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

computeSelfCost

public org.apache.calcite.plan.RelOptCost computeSelfCost(org.apache.calcite.plan.RelOptPlanner planner)

Specified by:

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

Overrides:

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

implement

public void implement(HiveRelNode.Implementor implementor)

Specified by:

implement in interface HiveRelNode

getVirtualCols

public List<Integer> getVirtualCols()