Package org.apache.calcite.sql2rel

Class StandardConvertletTable.RegrCovarianceConvertlet

java.lang.Object

org.apache.calcite.sql2rel.StandardConvertletTable.RegrCovarianceConvertlet

All Implemented Interfaces:

SqlRexConvertlet

Enclosing class:

StandardConvertletTable

private static class StandardConvertletTable.RegrCovarianceConvertlet
extends java.lang.Object
implements SqlRexConvertlet

Convertlet that handles COVAR_POP, COVAR_SAMP, REGR_SXX, REGR_SYY windowed aggregate functions.

Field Summary

Fields

Modifier and Type	Field	Description
private SqlKind	kind

Constructor Summary

Constructors

Constructor	Description
RegrCovarianceConvertlet(SqlKind kind)

Method Summary

Modifier and Type	Method	Description
RexNode	convertCall(SqlRexContext cx, SqlCall call)
private SqlNode	expandCovariance(SqlNode arg0Input, SqlNode arg1Input, SqlNode dependent, RelDataType varType, SqlRexContext cx, boolean biased)
private SqlNode	expandRegrSzz(SqlNode arg1, SqlNode arg2, RelDataType avgType, SqlRexContext cx, boolean variance)
private SqlNode	getCastedSqlNode(SqlNode argInput, RelDataType varType, SqlParserPos pos, RexNode argRex)

Methods inherited from class java.lang.Object

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

Field Detail

kind

private final SqlKind kind

Constructor Detail

RegrCovarianceConvertlet

RegrCovarianceConvertlet(SqlKind kind)

Method Detail

convertCall

public RexNode convertCall(SqlRexContext cx,
                           SqlCall call)

Specified by:

convertCall in interface SqlRexConvertlet

expandRegrSzz

private SqlNode expandRegrSzz(SqlNode arg1,
                              SqlNode arg2,
                              RelDataType avgType,
                              SqlRexContext cx,
                              boolean variance)

expandCovariance

private SqlNode expandCovariance(SqlNode arg0Input,
                                 SqlNode arg1Input,
                                 SqlNode dependent,
                                 RelDataType varType,
                                 SqlRexContext cx,
                                 boolean biased)

getCastedSqlNode

private SqlNode getCastedSqlNode(SqlNode argInput,
                                 RelDataType varType,
                                 SqlParserPos pos,
                                 RexNode argRex)