greenplumn CScalarAssertConstraintList 源码
greenplumn CScalarAssertConstraintList 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarAssertConstraintList.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2015 VMware, Inc. or its affiliates.
//
// @filename:
// CScalarAssertConstraintList.h
//
// @doc:
// Class for scalar assert constraint list representing the predicate
// of Assert operators. For example:
//
// +--CScalarAssertConstraintList
// |--CScalarAssertConstraint (ErrorMsg: Check constraint r_check for table r violated)
// | +--CScalarIsDistinctFrom (=)
// | |--CScalarCmp (<)
// | | |--CScalarIdent "d" (4)
// | | +--CScalarIdent "c" (3)
// | +--CScalarConst (0)
// +--CScalarAssertConstraint (ErrorMsg: Check constraint r_c_check for table r violated)
// +--CScalarIsDistinctFrom (=)
// |--CScalarCmp (>)
// | |--CScalarIdent "c" (3)
// | +--CScalarConst (0)
// +--CScalarConst (0)
//---------------------------------------------------------------------------
#ifndef GPOPT_CScalarAssertConstraintList_H
#define GPOPT_CScalarAssertConstraintList_H
#include "gpos/base.h"
#include "gpopt/operators/CScalar.h"
#include "naucrates/md/IMDId.h"
namespace gpopt
{
using namespace gpos;
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CScalarAssertConstraintList
//
// @doc:
// Scalar assert constraint list
//
//---------------------------------------------------------------------------
class CScalarAssertConstraintList : public CScalar
{
private:
public:
CScalarAssertConstraintList(const CScalarAssertConstraintList &) = delete;
// ctor
CScalarAssertConstraintList(CMemoryPool *mp);
// ident accessors
EOperatorId
Eopid() const override
{
return EopScalarAssertConstraintList;
}
// operator name
const CHAR *
SzId() const override
{
return "CScalarAssertConstraintList";
}
// match function
BOOL Matches(COperator *pop) const override;
// sensitivity to order of inputs
BOOL
FInputOrderSensitive() const override
{
return false;
}
// return a copy of the operator with remapped columns
COperator *
PopCopyWithRemappedColumns(CMemoryPool *, //mp,
UlongToColRefMap *, //colref_mapping,
BOOL //must_exist
) override
{
return PopCopyDefault();
}
// type of expression's result
IMDId *MdidType() const override;
// conversion function
static CScalarAssertConstraintList *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopScalarAssertConstraintList == pop->Eopid());
return dynamic_cast<CScalarAssertConstraintList *>(pop);
}
}; // class CScalarAssertConstraintList
} // namespace gpopt
#endif // !GPOPT_CScalarAssertConstraintList_H
// EOF
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