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, RelOptNode, Hintable, RelNode

public class LogicalSnapshot
extends Snapshot

Sub-class of Snapshot not targeted at any particular engine or calling convention.

Nested Class Summary

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

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(RelOptCluster cluster, RelTraitSet traitSet, List<RelHint> hints, RelNode input, RexNode period) Creates a LogicalSnapshot.
LogicalSnapshot(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, RexNode period) Creates a LogicalSnapshot.

Method Summary

Modifier and Type	Method and Description
Snapshot	copy(RelTraitSet traitSet, RelNode input, RexNode period)
static LogicalSnapshot	create(RelNode input, RexNode period) Creates a LogicalSnapshot.
RelNode	withHints(List<RelHint> hintList) Returns a new relational expression with the specified hints hintList.

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

accept, copy, explainTerms, getHints, getPeriod, 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, 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(RelOptCluster cluster,
                       RelTraitSet traitSet,
                       List<RelHint> hints,
                       RelNode input,
                       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(RelOptCluster cluster,
                       RelTraitSet traitSet,
                       RelNode input,
                       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 Snapshot copy(RelTraitSet traitSet,
                     RelNode input,
                     RexNode period)

Specified by:

copy in class Snapshot

create

public static LogicalSnapshot create(RelNode input,
                                     RexNode period)

Creates a LogicalSnapshot.

withHints

public RelNode withHints(List<RelHint> hintList)

Description copied from interface: Hintable

Returns a new relational expression with the specified hints hintList.

This method should be overridden by every logical node that supports hint. It is only for internal use during decorrelation.

Sub-class should return a new copy of the relational expression.

The default implementation returns the relational expression directly only because not every kind of relational expression supports hints.

Returns:

Relational expression with set up hints