greenplumn CScalarCoerceViaIO 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarCoerceViaIO.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CScalarCoerceViaIO.h
/
/ @doc:
/ Scalar CoerceViaIO operator,
/ the operator captures coercing a value from one type to another, by
/ calling the output function of the argument type, and passing the
/ result to the input function of the result type.
/
/ @owner:
/
/ @test:
/
/
/---------------------------------------------------------------------------
#ifndef GPOPT_CScalarCoerceViaIO_H
#define GPOPT_CScalarCoerceViaIO_H
#include "gpos/base.h"
#include "gpopt/operators/CScalarCoerceBase.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CScalarCoerceViaIO
/
/ @doc:
/ Scalar CoerceViaIO operator
/
/---------------------------------------------------------------------------
class CScalarCoerceViaIO : public CScalarCoerceBase
{
private:
public:
CScalarCoerceViaIO(const CScalarCoerceViaIO &) = delete;
/ ctor
CScalarCoerceViaIO(CMemoryPool *mp, IMDId *mdid_type, INT type_modifier,
ECoercionForm dxl_coerce_format, INT location);
/ dtor
~CScalarCoerceViaIO() override = default;
EOperatorId
Eopid() const override
{
return EopScalarCoerceViaIO;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CScalarCoerceViaIO";
}
/ match function
BOOL Matches(COperator *) const override;
/ sensitivity to order of inputs
BOOL
FInputOrderSensitive() const override
{
return false;
}
/ conversion function
static CScalarCoerceViaIO *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopScalarCoerceViaIO == pop->Eopid());
return dynamic_cast<CScalarCoerceViaIO *>(pop);
}
}; / class CScalarCoerceViaIO
} / namespace gpopt
#endif / !GPOPT_CScalarCoerceViaIO_H
/ EOF
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