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

Class DruidExpression.ExpressionVirtualColumnCreator

java.lang.Object

org.apache.druid.sql.calcite.expression.DruidExpression.ExpressionVirtualColumnCreator

All Implemented Interfaces:

DruidExpression.VirtualColumnCreator

Enclosing class:

DruidExpression

public static class DruidExpression.ExpressionVirtualColumnCreator
extends Object
implements DruidExpression.VirtualColumnCreator

Constructor Summary

Constructors

Constructor	Description
ExpressionVirtualColumnCreator()

Method Summary

Modifier and Type	Method	Description
VirtualColumn	create(String name, ColumnType outputType, ExpressionParser parser, DruidExpression self)	Create a virtual column for an expression.

Methods inherited from class java.lang.Object

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

Constructor Details

ExpressionVirtualColumnCreator

public ExpressionVirtualColumnCreator()

Method Details

create

public VirtualColumn create(String name,
 ColumnType outputType,
 ExpressionParser parser,
 DruidExpression self)

Description copied from interface: DruidExpression.VirtualColumnCreator

Create a virtual column for an expression.

Specified by:

create in interface DruidExpression.VirtualColumnCreator

Parameters:

name - name of the virtual column

outputType - type of the virtual column

parser - expression parser, if needed

self - expression, possibly rewritten to refer to specialized virtual columns