greenplumn CDXLScalarCoerceBase 源码

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

相关信息

greenplumn 源码目录

相关文章

greenplumn CDXLColDescr 源码

greenplumn CDXLColRef 源码

greenplumn CDXLCtasStorageOptions 源码

greenplumn CDXLDatum 源码

greenplumn CDXLDatumBool 源码

greenplumn CDXLDatumGeneric 源码

greenplumn CDXLDatumInt2 源码

greenplumn CDXLDatumInt4 源码

greenplumn CDXLDatumInt8 源码

greenplumn CDXLDatumOid 源码