greenplumn CScalarCaseTest 代码
文件路径：/src/backend/gporca/libgpopt/src/operators/CScalarCaseTest.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CScalarCaseTest.cpp
/
/ @doc:
/ Implementation of scalar case test operator
/---------------------------------------------------------------------------
#include "gpopt/operators/CScalarCaseTest.h"
#include "gpos/base.h"
using namespace gpopt;
using namespace gpmd;
/---------------------------------------------------------------------------
/ @function:
/ CScalarCaseTest::CScalarCaseTest
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CScalarCaseTest::CScalarCaseTest(CMemoryPool *mp, IMDId *mdid_type)
: CScalar(mp), m_mdid_type(mdid_type)
{
GPOS_ASSERT(mdid_type->IsValid());
}
/---------------------------------------------------------------------------
/ @function:
/ CScalarCaseTest::~CScalarCaseTest
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CScalarCaseTest::~CScalarCaseTest()
{
m_mdid_type->Release();
}
/---------------------------------------------------------------------------
/ @function:
/ CScalarCaseTest::HashValue
/
/ @doc:
/ Operator specific hash function; combined hash of operator id and
/ return type id
/
/---------------------------------------------------------------------------
ULONG
CScalarCaseTest::HashValue() const
{
return gpos::CombineHashes(COperator::HashValue(),
m_mdid_type->HashValue());
}
/---------------------------------------------------------------------------
/ @function:
/ CScalarCaseTest::FInputOrderSensitive
/
/ @doc:
/ Not called for leaf operators
/
/---------------------------------------------------------------------------
BOOL
CScalarCaseTest::FInputOrderSensitive() const
{
GPOS_ASSERT(!"Unexpected call of function FInputOrderSensitive");
return false;
}
/---------------------------------------------------------------------------
/ @function:
/ CScalarCaseTest::Matches
/
/ @doc:
/ Match function on operator level
/
/---------------------------------------------------------------------------
BOOL
CScalarCaseTest::Matches(COperator *pop) const
{
if (pop->Eopid() == Eopid())
{
CScalarCaseTest *popScCaseTest = CScalarCaseTest::PopConvert(pop);
/ match if return types are identical
return popScCaseTest->MdidType()->Equals(m_mdid_type);
}
return false;
}
/ EOF
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