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

Nested Class Summary

Nested Classes

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

Method Summary

Methods

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

Method Detail

convert

org.apache.calcite.rex.RexNode convert(org.apache.calcite.rex.RexBuilder rexBuilder,
                                     org.apache.calcite.rex.RexNode groupCall,
                                     org.apache.calcite.rex.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