greenplumn CDXLScalarSubqueryQuantified 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLScalarSubqueryQuantified.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC, Corp.
/
/ @filename:
/ CDXLScalarSubqueryQuantified.cpp
/
/ @doc:
/ Implementation of quantified subquery operator
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLScalarSubqueryQuantified.h"
#include "gpos/string/CWStringDynamic.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
using namespace gpmd;
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSubqueryQuantified::CDXLScalarSubqueryQuantified
/
/ @doc:
/ Constructor
/
/---------------------------------------------------------------------------
CDXLScalarSubqueryQuantified::CDXLScalarSubqueryQuantified(
CMemoryPool *mp, IMDId *scalar_op_mdid, CMDName *scalar_op_mdname,
ULONG colid)
: CDXLScalar(mp),
m_scalar_op_mdid(scalar_op_mdid),
m_scalar_op_mdname(scalar_op_mdname),
m_colid(colid)
{
GPOS_ASSERT(scalar_op_mdid->IsValid());
GPOS_ASSERT(nullptr != scalar_op_mdname);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSubqueryQuantified::~CDXLScalarSubqueryQuantified
/
/ @doc:
/ Destructor
/
/---------------------------------------------------------------------------
CDXLScalarSubqueryQuantified::~CDXLScalarSubqueryQuantified()
{
m_scalar_op_mdid->Release();
GPOS_DELETE(m_scalar_op_mdname);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSubqueryQuantified::SerializeToDXL
/
/ @doc:
/ Serialize operator in DXL format
/
/---------------------------------------------------------------------------
void
CDXLScalarSubqueryQuantified::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const
{
const CWStringConst *element_name = GetOpNameStr();
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
/ serialize operator id and name
xml_serializer->AddAttribute(CDXLTokens::GetDXLTokenStr(EdxltokenOpName),
m_scalar_op_mdname->GetMDName());
m_scalar_op_mdid->Serialize(xml_serializer,
CDXLTokens::GetDXLTokenStr(EdxltokenOpNo));
/ serialize computed column id
xml_serializer->AddAttribute(CDXLTokens::GetDXLTokenStr(EdxltokenColId),
m_colid);
dxlnode->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
#ifdef GPOS_DEBUG
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSubqueryQuantified::AssertValid
/
/ @doc:
/ Checks whether operator node is well-structured
/
/---------------------------------------------------------------------------
void
CDXLScalarSubqueryQuantified::AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const
{
GPOS_ASSERT(2 == dxlnode->Arity());
CDXLNode *pdxlnScalarChild = (*dxlnode)[EdxlsqquantifiedIndexScalar];
CDXLNode *pdxlnRelationalChild =
(*dxlnode)[EdxlsqquantifiedIndexRelational];
GPOS_ASSERT(EdxloptypeScalar ==
pdxlnScalarChild->GetOperator()->GetDXLOperatorType());
GPOS_ASSERT(EdxloptypeLogical ==
pdxlnRelationalChild->GetOperator()->GetDXLOperatorType());
dxlnode->AssertValid(validate_children);
}
#endif / GPOS_DEBUG
/ EOF
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