greenplumn CXformGbAgg2ScalarAgg 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformGbAgg2ScalarAgg.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 EMC Corp.
/
/ @filename:
/ CXformGbAgg2ScalarAgg.h
/
/ @doc:
/ Transform GbAgg to ScalarAgg
/---------------------------------------------------------------------------
#ifndef GPOPT_CXformGbAgg2ScalarAgg_H
#define GPOPT_CXformGbAgg2ScalarAgg_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformImplementation.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CXformGbAgg2ScalarAgg
/
/ @doc:
/ Transform Get to TableScan
/
/---------------------------------------------------------------------------
class CXformGbAgg2ScalarAgg : public CXformImplementation
{
private:
public:
CXformGbAgg2ScalarAgg(const CXformGbAgg2ScalarAgg &) = delete;
/ ctor
CXformGbAgg2ScalarAgg(CMemoryPool *mp);
/ dtor
~CXformGbAgg2ScalarAgg() override = default;
/ ident accessors
EXformId
Exfid() const override
{
return ExfGbAgg2ScalarAgg;
}
/ return a string for xform name
const CHAR *
SzId() const override
{
return "CXformGbAgg2ScalarAgg";
}
/ compute xform promise for a given expression handle
EXformPromise Exfp(CExpressionHandle &exprhdl) const override;
/ actual transform
void Transform(CXformContext *pxfctxt, CXformResult *pxfres,
CExpression *pexpr) const override;
}; / class CXformGbAgg2ScalarAgg
} / namespace gpopt
#endif / !GPOPT_CXformGbAgg2ScalarAgg_H
/ EOF
相关信息
相关文章
greenplumn CJoinOrderGreedy 源码
greenplumn CJoinOrderMinCard 源码
greenplumn CSubqueryHandler 源码