greenplumn CScalarCoerceToDomain 源码
greenplumn CScalarCoerceToDomain 代码
文件路径：/src/backend/gporca/libgpopt/src/operators/CScalarCoerceToDomain.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CScalarCoerceToDomain.cpp
//
// @doc:
// Implementation of scalar CoerceToDomain operators
//---------------------------------------------------------------------------
#include "gpopt/operators/CScalarCoerceToDomain.h"
#include "gpos/base.h"
using namespace gpopt;
using namespace gpmd;
//---------------------------------------------------------------------------
// @function:
// CScalarCoerceToDomain::CScalarCoerceToDomain
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CScalarCoerceToDomain::CScalarCoerceToDomain(CMemoryPool *mp, IMDId *mdid_type,
INT type_modifier,
ECoercionForm ecf, INT location)
: CScalarCoerceBase(mp, mdid_type, type_modifier, ecf, location),
m_returns_null_on_null_input(false)
{
}
//---------------------------------------------------------------------------
// @function:
// CScalarCoerceToDomain::Matches
//
// @doc:
// Match function on operator level
//
//---------------------------------------------------------------------------
BOOL
CScalarCoerceToDomain::Matches(COperator *pop) const
{
if (pop->Eopid() == Eopid())
{
CScalarCoerceToDomain *popCoerce =
CScalarCoerceToDomain::PopConvert(pop);
return popCoerce->MdidType()->Equals(MdidType()) &&
popCoerce->TypeModifier() == TypeModifier() &&
popCoerce->Ecf() == Ecf() && popCoerce->Location() == Location();
}
return false;
}
//---------------------------------------------------------------------------
// @function:
// CScalarCoerceToDomain::Eber
//
// @doc:
// Perform boolean expression evaluation
//
//---------------------------------------------------------------------------
CScalar::EBoolEvalResult
CScalarCoerceToDomain::Eber(ULongPtrArray *pdrgpulChildren) const
{
if (m_returns_null_on_null_input)
{
return EberNullOnAnyNullChild(pdrgpulChildren);
}
return EberAny;
}
// EOF
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