Package org.apache.calcite.sql2rel

Interface AuxiliaryConverter

All Known Implementing Classes:

AuxiliaryConverter.Impl

public interface AuxiliaryConverter

Converts an expression for a group window function (e.g. TUMBLE) into an expression for an auxiliary group function (e.g. TUMBLE_START).

See Also:

• SqlStdOperatorTable.TUMBLE_OLD

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	AuxiliaryConverter.Impl	Simple implementation of AuxiliaryConverter.

Method Summary

Modifier and Type	Method	Description
RexNode	convert(RexBuilder rexBuilder, RexNode groupCall, RexNode e)	Converts an expression.

Method Details

convert

RexNode convert(RexBuilder rexBuilder,
 RexNode groupCall,
 RexNode e)

Converts an expression.

Parameters:

rexBuilder - Rex builder

groupCall - Call to the group function, e.g. "TUMBLE($2, 36000)"

e - Expression holding result of the group function, e.g. "$0"

Returns:

Expression for auxiliary function, e.g. "$0 + 36000" converts the result of TUMBLE to the result of TUMBLE_END