Package org.apache.druid.sql.calcite.expression

Class AliasedOperatorConversion

java.lang.Object

org.apache.druid.sql.calcite.expression.AliasedOperatorConversion

All Implemented Interfaces:

SqlOperatorConversion

Direct Known Subclasses:

MultiValueStringOperatorConversions.Length, MultiValueStringOperatorConversions.MultiStringToString, MultiValueStringOperatorConversions.OffsetOf, MultiValueStringOperatorConversions.OrdinalOf

public class AliasedOperatorConversion
extends Object
implements SqlOperatorConversion

Constructor Summary

Constructors

Constructor	Description
AliasedOperatorConversion(SqlOperatorConversion baseConversion, String name)

Method Summary

Modifier and Type	Method	Description
org.apache.calcite.sql.SqlOperator	calciteOperator()	Returns the SQL operator corresponding to this function.
DruidExpression	toDruidExpression(PlannerContext plannerContext, RowSignature rowSignature, org.apache.calcite.rex.RexNode rexNode)	Translate a Calcite RexNode to a Druid expression.
DruidExpression	toDruidExpressionWithPostAggOperands(PlannerContext plannerContext, RowSignature rowSignature, org.apache.calcite.rex.RexNode rexNode, PostAggregatorVisitor postAggregatorVisitor)	Translate a Calcite RexNode to a Druid expression, with the possibility of having postagg operands.
DimFilter	toDruidFilter(PlannerContext plannerContext, RowSignature rowSignature, VirtualColumnRegistry virtualColumnRegistry, org.apache.calcite.rex.RexNode rexNode)	Returns a Druid filter corresponding to a Calcite RexNode used as a filter condition.
PostAggregator	toPostAggregator(PlannerContext plannerContext, RowSignature querySignature, org.apache.calcite.rex.RexNode rexNode, PostAggregatorVisitor postAggregatorVisitor)	Returns a Druid PostAggregator corresponding to a Calcite RexNode used to transform a row after aggregation has occurred.

Methods inherited from class java.lang.Object

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

Constructor Details

AliasedOperatorConversion

public AliasedOperatorConversion(SqlOperatorConversion baseConversion,
 String name)

Method Details

calciteOperator

public org.apache.calcite.sql.SqlOperator calciteOperator()

Description copied from interface: SqlOperatorConversion

Returns the SQL operator corresponding to this function. Should be a singleton.

Specified by:

calciteOperator in interface SqlOperatorConversion

Returns:

operator

toDruidExpression

public DruidExpression toDruidExpression(PlannerContext plannerContext,
 RowSignature rowSignature,
 org.apache.calcite.rex.RexNode rexNode)

Description copied from interface: SqlOperatorConversion

Translate a Calcite RexNode to a Druid expression.

Specified by:

toDruidExpression in interface SqlOperatorConversion

Parameters:

plannerContext - SQL planner context

rowSignature - signature of the rows to be extracted from

rexNode - expression meant to be applied on top of the rows

Returns:

Druid expression, or null if translation is not possible

See Also:

• Expressions.toDruidExpression(PlannerContext, RowSignature, RexNode)

toDruidExpressionWithPostAggOperands

@Nullable
public DruidExpression toDruidExpressionWithPostAggOperands(PlannerContext plannerContext,
 RowSignature rowSignature,
 org.apache.calcite.rex.RexNode rexNode,
 PostAggregatorVisitor postAggregatorVisitor)

Description copied from interface: SqlOperatorConversion

Translate a Calcite RexNode to a Druid expression, with the possibility of having postagg operands.

Specified by:

toDruidExpressionWithPostAggOperands in interface SqlOperatorConversion

Parameters:

plannerContext - SQL planner context

rowSignature - signature of the rows to be extracted from

rexNode - expression meant to be applied on top of the rows

postAggregatorVisitor - visitor that manages postagg names and tracks postaggs that were created as by the translation

Returns:

Druid expression, or null if translation is not possible

See Also:

• Expressions.toDruidExpression(PlannerContext, RowSignature, RexNode)

toDruidFilter

@Nullable
public DimFilter toDruidFilter(PlannerContext plannerContext,
 RowSignature rowSignature,
 @Nullable
 VirtualColumnRegistry virtualColumnRegistry,
 org.apache.calcite.rex.RexNode rexNode)

Description copied from interface: SqlOperatorConversion

Returns a Druid filter corresponding to a Calcite RexNode used as a filter condition.

Specified by:

toDruidFilter in interface SqlOperatorConversion

Parameters:

plannerContext - SQL planner context

rowSignature - input row signature

virtualColumnRegistry - re-usable virtual column references

rexNode - filter expression rex node

Returns:

filter, or null if the call cannot be translated to a filter

toPostAggregator

@Nullable
public PostAggregator toPostAggregator(PlannerContext plannerContext,
 RowSignature querySignature,
 org.apache.calcite.rex.RexNode rexNode,
 PostAggregatorVisitor postAggregatorVisitor)

Description copied from interface: SqlOperatorConversion

Returns a Druid PostAggregator corresponding to a Calcite RexNode used to transform a row after aggregation has occurred.

Specified by:

toPostAggregator in interface SqlOperatorConversion

Parameters:

plannerContext - SQL planner context

querySignature - signature of the rows to be extracted from

rexNode - expression meant to be applied on top of the rows

postAggregatorVisitor - visitor that manages postagg names and tracks postaggs that were created by the translation

Returns:

filter, or null if the call cannot be translated