org.apache.drill.exec.planner.index

Class FindFiltersForCollation

java.lang.Object

org.apache.calcite.rex.RexVisitorImpl<Boolean>

org.apache.drill.exec.planner.index.FindFiltersForCollation

All Implemented Interfaces:

org.apache.calcite.rex.RexVisitor<Boolean>

public class FindFiltersForCollation
extends org.apache.calcite.rex.RexVisitorImpl<Boolean>

A visitor class that analyzes a filter condition (typically an index condition) and a supplied input collation and determines what the output collation would be after applying the filter.

Field Summary

Fields inherited from class org.apache.calcite.rex.RexVisitorImpl

deep

Constructor Summary

Constructors

Constructor and Description
FindFiltersForCollation(org.apache.calcite.rel.RelNode input)

Method Summary

Modifier and Type	Method and Description
Map<Integer,List<org.apache.calcite.rex.RexNode>>	analyze(org.apache.calcite.rex.RexNode indexCondition) For each RelFieldCollation, gather the set of filter conditions corresponding to it e.g suppose input collation is [0][1] and there are filter conditions: $0 = 5 AND $1 > 10 AND $1 <20 then the map will have 2 entries: [0] -> ($0 = 5) [1] -> {($1 > 10), ($1 < 20)}
Boolean	visitCall(org.apache.calcite.rex.RexCall call)
Boolean	visitCorrelVariable(org.apache.calcite.rex.RexCorrelVariable correlVariable)
Boolean	visitDynamicParam(org.apache.calcite.rex.RexDynamicParam dynamicParam)
Boolean	visitFieldAccess(org.apache.calcite.rex.RexFieldAccess fieldAccess)
Boolean	visitInputRef(org.apache.calcite.rex.RexInputRef inputRef)
Boolean	visitLiteral(org.apache.calcite.rex.RexLiteral literal)
Boolean	visitLocalRef(org.apache.calcite.rex.RexLocalRef localRef)
Boolean	visitOver(org.apache.calcite.rex.RexOver over)
Boolean	visitRangeRef(org.apache.calcite.rex.RexRangeRef rangeRef)

Methods inherited from class org.apache.calcite.rex.RexVisitorImpl

visitArrayAnd, visitArrayOr, visitPatternFieldRef, visitSubQuery, visitTableInputRef

Methods inherited from class java.lang.Object

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

Constructor Detail

FindFiltersForCollation

public FindFiltersForCollation(org.apache.calcite.rel.RelNode input)

Method Detail

analyze

public Map<Integer,List<org.apache.calcite.rex.RexNode>> analyze(org.apache.calcite.rex.RexNode indexCondition)

For each RelFieldCollation, gather the set of filter conditions corresponding to it e.g suppose input collation is [0][1] and there are filter conditions: $0 = 5 AND $1 > 10 AND $1 <20 then the map will have 2 entries: [0] -> ($0 = 5) [1] -> {($1 > 10), ($1 < 20)}

Parameters:

indexCondition - index condition to analyze

Returns:

list of output RelFieldCollation

visitInputRef

public Boolean visitInputRef(org.apache.calcite.rex.RexInputRef inputRef)

Specified by:

visitInputRef in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitInputRef in class org.apache.calcite.rex.RexVisitorImpl<Boolean>

visitLiteral

public Boolean visitLiteral(org.apache.calcite.rex.RexLiteral literal)

Specified by:

visitLiteral in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitLiteral in class org.apache.calcite.rex.RexVisitorImpl<Boolean>

visitOver

public Boolean visitOver(org.apache.calcite.rex.RexOver over)

Specified by:

visitOver in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitOver in class org.apache.calcite.rex.RexVisitorImpl<Boolean>

visitCorrelVariable

public Boolean visitCorrelVariable(org.apache.calcite.rex.RexCorrelVariable correlVariable)

Specified by:

visitCorrelVariable in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitCorrelVariable in class org.apache.calcite.rex.RexVisitorImpl<Boolean>

visitCall

public Boolean visitCall(org.apache.calcite.rex.RexCall call)

Specified by:

visitCall in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitCall in class org.apache.calcite.rex.RexVisitorImpl<Boolean>

visitDynamicParam

public Boolean visitDynamicParam(org.apache.calcite.rex.RexDynamicParam dynamicParam)

Specified by:

visitDynamicParam in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitDynamicParam in class org.apache.calcite.rex.RexVisitorImpl<Boolean>

visitRangeRef

public Boolean visitRangeRef(org.apache.calcite.rex.RexRangeRef rangeRef)

Specified by:

visitRangeRef in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitRangeRef in class org.apache.calcite.rex.RexVisitorImpl<Boolean>

visitFieldAccess

public Boolean visitFieldAccess(org.apache.calcite.rex.RexFieldAccess fieldAccess)

Specified by:

visitFieldAccess in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitFieldAccess in class org.apache.calcite.rex.RexVisitorImpl<Boolean>

visitLocalRef

public Boolean visitLocalRef(org.apache.calcite.rex.RexLocalRef localRef)

Specified by:

visitLocalRef in interface org.apache.calcite.rex.RexVisitor<Boolean>

Overrides:

visitLocalRef in class org.apache.calcite.rex.RexVisitorImpl<Boolean>