org.apache.calcite.sql2rel

接口 AuxiliaryConverter

所有已知实现类:

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).

另请参阅:

SqlStdOperatorTable.TUMBLE

嵌套类概要

嵌套类

限定符和类型	接口和说明
static class	AuxiliaryConverter.Impl Simple implementation of AuxiliaryConverter.

方法概要

限定符和类型	方法和说明
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.

方法详细资料

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.

参数:

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"

返回:

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