greenplumn CXformInnerApply2InnerJoinNoCorrelations 源码
greenplumn CXformInnerApply2InnerJoinNoCorrelations 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformInnerApply2InnerJoinNoCorrelations.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CXformInnerApply2InnerJoinNoCorrelations.h
//
// @doc:
// Turn inner Apply into Inner Join when Apply's inner child has no
// correlations
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformInnerApply2InnerJoinNoCorrelations_H
#define GPOPT_CXformInnerApply2InnerJoinNoCorrelations_H
#include "gpos/base.h"
#include "gpopt/operators/CLogicalInnerApply.h"
#include "gpopt/operators/CLogicalInnerJoin.h"
#include "gpopt/xforms/CXformApply2Join.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformInnerApply2InnerJoinNoCorrelations
//
// @doc:
// Transform inner apply into inner join
//
//---------------------------------------------------------------------------
class CXformInnerApply2InnerJoinNoCorrelations
: public CXformApply2Join<CLogicalInnerApply, CLogicalInnerJoin>
{
private:
public:
CXformInnerApply2InnerJoinNoCorrelations(
const CXformInnerApply2InnerJoinNoCorrelations &) = delete;
// ctor
explicit CXformInnerApply2InnerJoinNoCorrelations(CMemoryPool *mp)
: CXformApply2Join<CLogicalInnerApply, CLogicalInnerJoin>(mp)
{
}
// dtor
~CXformInnerApply2InnerJoinNoCorrelations() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfInnerApply2InnerJoinNoCorrelations;
}
const CHAR *
SzId() const override
{
return "CXformInnerApply2InnerJoinNoCorrelations";
}
// 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 CXformInnerApply2InnerJoinNoCorrelations
} // namespace gpopt
#endif // !GPOPT_CXformInnerApply2InnerJoinNoCorrelations_H
// EOF
相关信息
相关文章
greenplumn CJoinOrderGreedy 源码
greenplumn CJoinOrderMinCard 源码
greenplumn CSubqueryHandler 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦