greenplumn CDXLScalarCoerceBase 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLScalarCoerceBase.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2017 VMware, Inc. or its affiliates.
/
/ @filename:
/ CDXLScalarCoerceBase.cpp
/
/ @doc:
/ Implementation of DXL scalar coerce base class
/
/ @owner:
/
/ @test:
/
/
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLScalarCoerceBase.h"
#include "gpopt/mdcache/CMDAccessor.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
#include "naucrates/dxl/xml/dxltokens.h"
using namespace gpopt;
using namespace gpos;
using namespace gpdxl;
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarCoerceBase::CDXLScalarCoerceBase
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CDXLScalarCoerceBase::CDXLScalarCoerceBase(CMemoryPool *mp, IMDId *mdid_type,
INT type_modifier,
EdxlCoercionForm dxl_coerce_format,
INT location)
: CDXLScalar(mp),
m_result_type_mdid(mdid_type),
m_type_modifier(type_modifier),
m_dxl_coerce_format(dxl_coerce_format),
m_location(location)
{
GPOS_ASSERT(nullptr != mdid_type);
GPOS_ASSERT(mdid_type->IsValid());
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarCoerceBase::~CDXLScalarCoerceBase
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CDXLScalarCoerceBase::~CDXLScalarCoerceBase()
{
m_result_type_mdid->Release();
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarCoerceBase::SerializeToDXL
/
/ @doc:
/ Serialize operator in DXL format
/
/---------------------------------------------------------------------------
void
CDXLScalarCoerceBase::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const
{
const CWStringConst *element_name = GetOpNameStr();
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
m_result_type_mdid->Serialize(xml_serializer,
CDXLTokens::GetDXLTokenStr(EdxltokenTypeId));
if (default_type_modifier != TypeModifier())
{
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenTypeMod), TypeModifier());
}
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenCoercionForm),
(ULONG) m_dxl_coerce_format);
xml_serializer->AddAttribute(CDXLTokens::GetDXLTokenStr(EdxltokenLocation),
m_location);
node->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarCoerceBase::HasBoolResult
/
/ @doc:
/ Does the operator return a boolean result
/
/---------------------------------------------------------------------------
BOOL
CDXLScalarCoerceBase::HasBoolResult(CMDAccessor *md_accessor) const
{
return (IMDType::EtiBool ==
md_accessor->RetrieveType(m_result_type_mdid)->GetDatumType());
}
#ifdef GPOS_DEBUG
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarCoerceBase::AssertValid
/
/ @doc:
/ Checks whether operator node is well-structured
/
/---------------------------------------------------------------------------
void
CDXLScalarCoerceBase::AssertValid(const CDXLNode *node,
BOOL validate_children) const
{
GPOS_ASSERT(1 == node->Arity());
CDXLNode *child_dxlnode = (*node)[0];
GPOS_ASSERT(EdxloptypeScalar ==
child_dxlnode->GetOperator()->GetDXLOperatorType());
if (validate_children)
{
child_dxlnode->GetOperator()->AssertValid(child_dxlnode,
validate_children);
}
}
#endif / GPOS_DEBUG
/ EOF
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