io.druid.sql.calcite.expression

Class ExtractExtractionOperator

java.lang.Object

io.druid.sql.calcite.expression.ExtractExtractionOperator

All Implemented Interfaces:

SqlExtractionOperator

public class ExtractExtractionOperator
extends Object
implements SqlExtractionOperator

Constructor Summary

Constructors

Constructor and Description
ExtractExtractionOperator()

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.sql.SqlFunction	calciteFunction() Returns the SQL operator corresponding to this aggregation function.
RowExtraction	convert(PlannerContext plannerContext, List<String> rowOrder, org.apache.calcite.rex.RexNode expression) Returns the Druid RowExtraction corresponding to a SQL RexNode.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtractExtractionOperator

public ExtractExtractionOperator()

Method Detail

calciteFunction

public org.apache.calcite.sql.SqlFunction calciteFunction()

Description copied from interface: SqlExtractionOperator

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

Specified by:

calciteFunction in interface SqlExtractionOperator

Returns:

operator

convert

public RowExtraction convert(PlannerContext plannerContext,
                             List<String> rowOrder,
                             org.apache.calcite.rex.RexNode expression)

Description copied from interface: SqlExtractionOperator

Returns the Druid RowExtraction corresponding to a SQL RexNode.

Specified by:

convert in interface SqlExtractionOperator

Parameters:

plannerContext - SQL planner context

rowOrder - order of fields in the Druid rows to be extracted from

expression - expression meant to be applied on top of the table

Returns:

(columnName, extractionFn) or null

See Also:

Expressions.toRowExtraction(PlannerContext, List, RexNode)