MongoFilter (Apache Calcite API)

java.lang.Object
- org.apache.calcite.rel.AbstractRelNode
- - org.apache.calcite.rel.SingleRel
  - - org.apache.calcite.rel.core.Filter
    - - org.apache.calcite.adapter.mongodb.MongoFilter

All Implemented Interfaces:

java.lang.Cloneable, MongoRel, RelOptNode, RelNode
```
public class MongoFilter
extends Filter
implements MongoRel
```
Implementation of a Filter relational expression in MongoDB.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

(package private) static class MongoFilter.Translator
Translates RexNode expressions into MongoDB expression strings.
- 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.Filter
  condition
- 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

MongoFilter(RelOptCluster cluster, RelTraitSet traitSet, RelNode child, RexNode condition)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`RelOptCost`	`computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq)`	Returns the cost of this plan (not including children).
`MongoFilter`	`copy(RelTraitSet traitSet, RelNode input, RexNode condition)`
`void`	`implement(MongoRel.Implementor implementor)`

Methods inherited from class org.apache.calcite.rel.core.Filter
accept, copy, estimateFilteredRows, estimateFilteredRows, estimateRowCount, explainTerms, getChildExps, getCondition, isValid

Methods inherited from class org.apache.calcite.rel.SingleRel
childrenAccept, deriveRowType, getInput, getInputs, replaceInput

Methods inherited from class org.apache.calcite.rel.AbstractRelNode
accept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, 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
  - MongoFilter
```
public MongoFilter(RelOptCluster cluster,
                   RelTraitSet traitSet,
                   RelNode child,
                   RexNode condition)
```
- 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 Filter
    
    Parameters:
    
    planner - Planner for cost calculation
    
    mq - Metadata query
    
    Returns:
    
    Cost of this plan (not including children)
  - copy
```
public MongoFilter copy(RelTraitSet traitSet,
                        RelNode input,
                        RexNode condition)
```
    Specified by:
    
    copy in class Filter
  - implement
```
public void implement(MongoRel.Implementor implementor)
```
    Specified by:
    
    implement in interface MongoRel