Package org.apache.calcite.adapter.mongodb

Class MongoSort

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.core.Sort

org.apache.calcite.adapter.mongodb.MongoSort

All Implemented Interfaces:

java.lang.Cloneable, MongoRel, RelOptNode, RelNode

public class MongoSort
extends Sort
implements MongoRel

Implementation of Sort relational expression in MongoDB.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.adapter.mongodb.MongoRel

MongoRel.Implementor

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

RelNode.Context

Field Summary

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

collation, fetch, fieldExps, offset

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.calcite.adapter.mongodb.MongoRel

CONVENTION

Constructor Summary

Constructors

Constructor	Description
MongoSort(RelOptCluster cluster, RelTraitSet traitSet, RelNode child, RelCollation collation, RexNode offset, RexNode fetch)

Method Summary

Modifier and Type	Method	Description
RelOptCost	computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq)	Returns the cost of this plan (not including children).
Sort	copy(RelTraitSet traitSet, RelNode input, RelCollation newCollation, RexNode offset, RexNode fetch)
private int	direction(RelFieldCollation fieldCollation)
void	implement(MongoRel.Implementor implementor)

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

accept, copy, copy, explainTerms, getChildExps, getCollation, getCollationList

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, 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

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

accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, copy, estimateRowCount, explain, getChildExps, 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

Constructor Detail

MongoSort

public MongoSort(RelOptCluster cluster,
                 RelTraitSet traitSet,
                 RelNode child,
                 RelCollation collation,
                 RexNode offset,
                 RexNode fetch)

Method Detail

computeSelfCost

public RelOptCost computeSelfCost(RelOptPlanner planner,
                                  RelMetadataQuery mq)

Description copied from interface: RelNode

Returns the cost of this plan (not including children). The base implementation throws an error; derived classes should override.

NOTE jvs 29-Mar-2006: Don't call this method directly. Instead, use RelMetadataQuery.getNonCumulativeCost(org.apache.calcite.rel.RelNode), which gives plugins a chance to override the rel's default ideas about cost.

Specified by:

computeSelfCost in interface RelNode

Overrides:

computeSelfCost in class Sort

Parameters:

planner - Planner for cost calculation

mq - Metadata query

Returns:

Cost of this plan (not including children)

copy

public Sort copy(RelTraitSet traitSet,
                 RelNode input,
                 RelCollation newCollation,
                 RexNode offset,
                 RexNode fetch)

Specified by:

copy in class Sort

implement

public void implement(MongoRel.Implementor implementor)

Specified by:

implement in interface MongoRel

direction

private int direction(RelFieldCollation fieldCollation)