greenplumn CXformSubqNAryJoin2Apply 源码
greenplumn CXformSubqNAryJoin2Apply 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformSubqNAryJoin2Apply.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CXformSubqNAryJoin2Apply.h
//
// @doc:
// Transform NAry Join to Apply
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformSubqNAryJoin2Apply_H
#define GPOPT_CXformSubqNAryJoin2Apply_H
#include "gpos/base.h"
#include "gpopt/operators/CExpression.h"
#include "gpopt/operators/CLogicalNAryJoin.h"
#include "gpopt/operators/CPatternMultiLeaf.h"
#include "gpopt/operators/CPatternTree.h"
#include "gpopt/xforms/CXformSubqJoin2Apply.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformSubqNAryJoin2Apply
//
// @doc:
// Transform NAry Join with subquery predicates to Apply
//
//---------------------------------------------------------------------------
class CXformSubqNAryJoin2Apply : public CXformSubqJoin2Apply
{
private:
public:
CXformSubqNAryJoin2Apply(const CXformSubqNAryJoin2Apply &) = delete;
// ctor
explicit CXformSubqNAryJoin2Apply(CMemoryPool *mp)
: CXformSubqJoin2Apply(
// pattern
GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CLogicalNAryJoin(mp),
GPOS_NEW(mp)
CExpression(mp, GPOS_NEW(mp) CPatternMultiLeaf(mp)),
GPOS_NEW(mp) CExpression(mp, GPOS_NEW(mp) CPatternTree(mp))))
{
}
// dtor
~CXformSubqNAryJoin2Apply() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfSubqNAryJoin2Apply;
}
const CHAR *
SzId() const override
{
return "CXformSubqNAryJoin2Apply";
}
}; // class CXformSubqNAryJoin2Apply
} // namespace gpopt
#endif // !GPOPT_CXformSubqNAryJoin2Apply_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
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦