org.apache.calcite.rel.core

Class Match

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.core.Match

All Implemented Interfaces:

Cloneable, RelOptNode, RelNode

Direct Known Subclasses:

LogicalMatch

public abstract class Match
extends SingleRel

Relational expression that represent a MATCH_RECOGNIZE node.

Each output row has the columns defined in the measure statements.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	Match.AggregateFinder Find aggregate functions in operands.
private static class	Match.PatternVarFinder Visits the operands of an aggregate call to retrieve relevant pattern variables.
static class	Match.RexMRAggCall Aggregate calls in match recognize.

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

RelNode.Context

Field Summary

Fields

Modifier and Type	Field and Description
protected RexNode	after
protected Set<Match.RexMRAggCall>	aggregateCalls
protected Map<String,SortedSet<Match.RexMRAggCall>>	aggregateCallsPreVar
protected boolean	allRows
protected RexNode	interval
protected com.google.common.collect.ImmutableMap<String,RexNode>	measures
protected RelCollation	orderKeys
protected List<RexNode>	partitionKeys
protected RexNode	pattern
protected com.google.common.collect.ImmutableMap<String,RexNode>	patternDefinitions
private static String	STAR
protected boolean	strictEnd
protected boolean	strictStart
protected com.google.common.collect.ImmutableMap<String,SortedSet<String>>	subsets

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

input

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

digest, id, rowType, traitSet

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Match(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, RelDataType rowType, RexNode pattern, boolean strictStart, boolean strictEnd, Map<String,RexNode> patternDefinitions, Map<String,RexNode> measures, RexNode after, Map<String,? extends SortedSet<String>> subsets, boolean allRows, List<RexNode> partitionKeys, RelCollation orderKeys, RexNode interval) Creates a Match.

Method Summary

Modifier and Type	Method and Description
abstract Match	copy(RelNode input, RelDataType rowType, RexNode pattern, boolean strictStart, boolean strictEnd, Map<String,RexNode> patternDefinitions, Map<String,RexNode> measures, RexNode after, Map<String,? extends SortedSet<String>> subsets, boolean allRows, List<RexNode> partitionKeys, RelCollation orderKeys, RexNode interval)
RelNode	copy(RelTraitSet traitSet, List<RelNode> inputs) Creates a copy of this relational expression, perhaps changing traits and inputs.
private static <K extends Comparable<K>,V> com.google.common.collect.ImmutableSortedMap<K,SortedSet<V>>	copyMap(Map<K,? extends SortedSet<V>> map) Creates an immutable map of a map of sorted sets.
RelWriter	explainTerms(RelWriter pw) Describes the inputs and attributes of this relational expression.
RexNode	getAfter()
RexNode	getInterval()
com.google.common.collect.ImmutableMap<String,RexNode>	getMeasures()
RelCollation	getOrderKeys()
List<RexNode>	getPartitionKeys()
RexNode	getPattern()
com.google.common.collect.ImmutableMap<String,RexNode>	getPatternDefinitions()
com.google.common.collect.ImmutableMap<String,SortedSet<String>>	getSubsets()
boolean	isAllRows()
boolean	isStrictEnd()
boolean	isStrictStart()

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

Methods inherited from class java.lang.Object

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

Field Detail

STAR

private static final String STAR

See Also:

Constant Field Values

measures

protected final com.google.common.collect.ImmutableMap<String,RexNode> measures

pattern

protected final RexNode pattern

strictStart

protected final boolean strictStart

strictEnd

protected final boolean strictEnd

allRows

protected final boolean allRows

after

protected final RexNode after

patternDefinitions

protected final com.google.common.collect.ImmutableMap<String,RexNode> patternDefinitions

aggregateCalls

protected final Set<Match.RexMRAggCall> aggregateCalls

aggregateCallsPreVar

protected final Map<String,SortedSet<Match.RexMRAggCall>> aggregateCallsPreVar

subsets

protected final com.google.common.collect.ImmutableMap<String,SortedSet<String>> subsets

partitionKeys

protected final List<RexNode> partitionKeys

orderKeys

protected final RelCollation orderKeys

interval

protected final RexNode interval

Constructor Detail

Match

protected Match(RelOptCluster cluster,
                RelTraitSet traitSet,
                RelNode input,
                RelDataType rowType,
                RexNode pattern,
                boolean strictStart,
                boolean strictEnd,
                Map<String,RexNode> patternDefinitions,
                Map<String,RexNode> measures,
                RexNode after,
                Map<String,? extends SortedSet<String>> subsets,
                boolean allRows,
                List<RexNode> partitionKeys,
                RelCollation orderKeys,
                RexNode interval)

Creates a Match.

Parameters:

cluster - Cluster

traitSet - Trait set

input - Input relational expression

rowType - Row type

pattern - Regular expression that defines pattern variables

strictStart - Whether it is a strict start pattern

strictEnd - Whether it is a strict end pattern

patternDefinitions - Pattern definitions

measures - Measure definitions

after - After match definitions

subsets - Subsets of pattern variables

allRows - Whether all rows per match (false means one row per match)

partitionKeys - Partition by columns

orderKeys - Order by columns

interval - Interval definition, null if WITHIN clause is not defined

Method Detail

copyMap

private static <K extends Comparable<K>,V> com.google.common.collect.ImmutableSortedMap<K,SortedSet<V>> copyMap(Map<K,? extends SortedSet<V>> map)

Creates an immutable map of a map of sorted sets.

getMeasures

public com.google.common.collect.ImmutableMap<String,RexNode> getMeasures()

getAfter

public RexNode getAfter()

getPattern

public RexNode getPattern()

isStrictStart

public boolean isStrictStart()

isStrictEnd

public boolean isStrictEnd()

isAllRows

public boolean isAllRows()

getPatternDefinitions

public com.google.common.collect.ImmutableMap<String,RexNode> getPatternDefinitions()

getSubsets

public com.google.common.collect.ImmutableMap<String,SortedSet<String>> getSubsets()

getPartitionKeys

public List<RexNode> getPartitionKeys()

getOrderKeys

public RelCollation getOrderKeys()

getInterval

public RexNode getInterval()

copy

public abstract Match copy(RelNode input,
                           RelDataType rowType,
                           RexNode pattern,
                           boolean strictStart,
                           boolean strictEnd,
                           Map<String,RexNode> patternDefinitions,
                           Map<String,RexNode> measures,
                           RexNode after,
                           Map<String,? extends SortedSet<String>> subsets,
                           boolean allRows,
                           List<RexNode> partitionKeys,
                           RelCollation orderKeys,
                           RexNode interval)

copy

public RelNode copy(RelTraitSet traitSet,
                    List<RelNode> inputs)

Description copied from interface: RelNode

Creates a copy of this relational expression, perhaps changing traits and inputs.

Sub-classes with other important attributes are encouraged to create variants of this method with more parameters.

Specified by:

copy in interface RelNode

Overrides:

copy in class AbstractRelNode

Parameters:

traitSet - Trait set

inputs - Inputs

Returns:

Copy of this relational expression, substituting traits and inputs

explainTerms

public RelWriter explainTerms(RelWriter pw)

Description copied from class: AbstractRelNode

Describes the inputs and attributes of this relational expression. Each node should call super.explainTerms, then call the RelWriterImpl.input(String, RelNode) and RelWriterImpl.item(String, Object) methods for each input and attribute.

Overrides:

explainTerms in class SingleRel

Parameters:

pw - Plan writer

Returns:

Plan writer for fluent-explain pattern