org.apache.calcite.rel.logical

Class LogicalSnapshot

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.core.Snapshot

org.apache.calcite.rel.logical.LogicalSnapshot

All Implemented Interfaces:

Cloneable, org.apache.calcite.plan.RelOptNode, org.apache.calcite.rel.hint.Hintable, org.apache.calcite.rel.RelNode

public class LogicalSnapshot
extends org.apache.calcite.rel.core.Snapshot

Sub-class of Snapshot not targeted at any particular engine or calling convention. The class was copied over because of * CALCITE-4554. *

Line 106 ~ 117: Calcite only supports timestamp type as period type, but Flink supports both Timestamp and TimestampLtz. Should be removed once calcite support TimestampLtz as period type.

Nested Class Summary

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

org.apache.calcite.rel.RelNode.Context

Field Summary

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

hints

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

Constructor and Description
LogicalSnapshot(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelTraitSet traitSet, List<org.apache.calcite.rel.hint.RelHint> hints, org.apache.calcite.rel.RelNode input, org.apache.calcite.rex.RexNode period) Creates a LogicalSnapshot.
LogicalSnapshot(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelTraitSet traitSet, org.apache.calcite.rel.RelNode input, org.apache.calcite.rex.RexNode period) Creates a LogicalSnapshot.

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.rel.core.Snapshot	copy(org.apache.calcite.plan.RelTraitSet traitSet, org.apache.calcite.rel.RelNode input, org.apache.calcite.rex.RexNode period)
static LogicalSnapshot	create(org.apache.calcite.rel.RelNode input, org.apache.calcite.rex.RexNode period) Creates a LogicalSnapshot.
boolean	isValid(org.apache.calcite.util.Litmus litmus, org.apache.calcite.rel.RelNode.Context context)
org.apache.calcite.rel.RelNode	withHints(List<org.apache.calcite.rel.hint.RelHint> hintList)

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

accept, copy, explainTerms, getHints, getPeriod

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, computeSelfCost, deepEquals, deepHashCode, equals, explain, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getRelDigest, getRelTypeName, getRowType, getTable, getTraitSet, getVariablesSet, hashCode, isEnforcer, metadata, onRegister, recomputeDigest, register, sole, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.calcite.rel.hint.Hintable

attachHints

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

explain, fieldIsNullable

Constructor Detail

LogicalSnapshot

public LogicalSnapshot(org.apache.calcite.plan.RelOptCluster cluster,
                       org.apache.calcite.plan.RelTraitSet traitSet,
                       List<org.apache.calcite.rel.hint.RelHint> hints,
                       org.apache.calcite.rel.RelNode input,
                       org.apache.calcite.rex.RexNode period)

Creates a LogicalSnapshot.

Use create(org.apache.calcite.rel.RelNode, org.apache.calcite.rex.RexNode) unless you know what you're doing.

Parameters:

cluster - Cluster that this relational expression belongs to

traitSet - The traits of this relational expression

hints - Hints for this node

input - Input relational expression

period - Timestamp expression which as the table was at the given time in the past

LogicalSnapshot

public LogicalSnapshot(org.apache.calcite.plan.RelOptCluster cluster,
                       org.apache.calcite.plan.RelTraitSet traitSet,
                       org.apache.calcite.rel.RelNode input,
                       org.apache.calcite.rex.RexNode period)

Creates a LogicalSnapshot.

Use create(org.apache.calcite.rel.RelNode, org.apache.calcite.rex.RexNode) unless you know what you're doing.

Parameters:

cluster - Cluster that this relational expression belongs to

traitSet - The traits of this relational expression

input - Input relational expression

period - Timestamp expression which as the table was at the given time in the past

Method Detail

copy

public org.apache.calcite.rel.core.Snapshot copy(org.apache.calcite.plan.RelTraitSet traitSet,
                                                 org.apache.calcite.rel.RelNode input,
                                                 org.apache.calcite.rex.RexNode period)

Specified by:

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

create

public static LogicalSnapshot create(org.apache.calcite.rel.RelNode input,
                                     org.apache.calcite.rex.RexNode period)

Creates a LogicalSnapshot.

isValid

public boolean isValid(org.apache.calcite.util.Litmus litmus,
                       org.apache.calcite.rel.RelNode.Context context)

Specified by:

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

Overrides:

isValid in class org.apache.calcite.rel.core.Snapshot

withHints

public org.apache.calcite.rel.RelNode withHints(List<org.apache.calcite.rel.hint.RelHint> hintList)