greenplumn CScalarSubqueryAll 源码
greenplumn CScalarSubqueryAll 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarSubqueryAll.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// CScalarSubqueryAll.h
//
// @doc:
// Class for scalar subquery ALL operators
//---------------------------------------------------------------------------
#ifndef GPOPT_CScalarSubqueryAll_H
#define GPOPT_CScalarSubqueryAll_H
#include "gpos/base.h"
#include "gpopt/operators/CScalarSubqueryQuantified.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CScalarSubqueryAll
//
// @doc:
// Scalar subquery ALL
// A scalar subquery ALL expression has two children: relational and scalar.
//
//---------------------------------------------------------------------------
class CScalarSubqueryAll : public CScalarSubqueryQuantified
{
private:
public:
CScalarSubqueryAll(const CScalarSubqueryAll &) = delete;
// ctor
CScalarSubqueryAll(CMemoryPool *mp, IMDId *scalar_op_mdid,
const CWStringConst *pstrScalarOp,
const CColRef *colref);
// dtor
~CScalarSubqueryAll() override = default;
// ident accessors
EOperatorId
Eopid() const override
{
return EopScalarSubqueryAll;
}
// return a string for scalar subquery
const CHAR *
SzId() const override
{
return "CScalarSubqueryAll";
}
// return a copy of the operator with remapped columns
COperator *PopCopyWithRemappedColumns(CMemoryPool *mp,
UlongToColRefMap *colref_mapping,
BOOL must_exist) override;
// conversion function
static CScalarSubqueryAll *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopScalarSubqueryAll == pop->Eopid());
return dynamic_cast<CScalarSubqueryAll *>(pop);
}
}; // class CScalarSubqueryAll
} // namespace gpopt
#endif // !GPOPT_CScalarSubqueryAll_H
// EOF
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