greenplumn CMDPartConstraintGPDB 代码
文件路径：/src/backend/gporca/libnaucrates/src/md/CMDPartConstraintGPDB.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CMDPartConstraintGPDB.cpp
/
/ @doc:
/ Implementation of part constraints in the MD cache
/---------------------------------------------------------------------------
#include "naucrates/md/CMDPartConstraintGPDB.h"
#include "gpopt/translate/CTranslatorDXLToExpr.h"
#include "naucrates/dxl/CDXLUtils.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpdxl;
using namespace gpmd;
using namespace gpopt;
/---------------------------------------------------------------------------
/ @function:
/ CMDPartConstraintGPDB::CMDPartConstraintGPDB
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CMDPartConstraintGPDB::CMDPartConstraintGPDB(
CMemoryPool *mp, ULongPtrArray *level_with_default_part_array,
BOOL is_unbounded, CDXLNode *dxlnode)
: m_mp(mp),
m_level_with_default_part_array(level_with_default_part_array),
m_is_unbounded(is_unbounded),
m_dxl_node(dxlnode)
{
GPOS_ASSERT(nullptr != level_with_default_part_array);
}
/---------------------------------------------------------------------------
/ @function:
/ CMDPartConstraintGPDB::~CMDPartConstraintGPDB
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CMDPartConstraintGPDB::~CMDPartConstraintGPDB()
{
CRefCount::SafeRelease(m_dxl_node);
m_level_with_default_part_array->Release();
}
/---------------------------------------------------------------------------
/ @function:
/ CMDPartConstraintGPDB::GetPartConstraintExpr
/
/ @doc:
/ Scalar expression of the check constraint
/
/---------------------------------------------------------------------------
CExpression *
CMDPartConstraintGPDB::GetPartConstraintExpr(CMemoryPool *mp,
CMDAccessor *md_accessor,
CColRefArray *colref_array) const
{
GPOS_ASSERT(nullptr != colref_array);
/ translate the DXL representation of the part constraint expression
CTranslatorDXLToExpr dxltr(mp, md_accessor);
return dxltr.PexprTranslateScalar(m_dxl_node, colref_array);
}
/---------------------------------------------------------------------------
/ @function:
/ CMDPartConstraintGPDB::GetDefaultPartsArray
/
/ @doc:
/ Included default partitions
/
/---------------------------------------------------------------------------
ULongPtrArray *
CMDPartConstraintGPDB::GetDefaultPartsArray() const
{
return m_level_with_default_part_array;
}
/---------------------------------------------------------------------------
/ @function:
/ CMDPartConstraintGPDB::IsConstraintUnbounded
/
/ @doc:
/ Is constraint unbounded
/
/---------------------------------------------------------------------------
BOOL
CMDPartConstraintGPDB::IsConstraintUnbounded() const
{
return m_is_unbounded;
}
/---------------------------------------------------------------------------
/ @function:
/ CMDPartConstraintGPDB::Serialize
/
/ @doc:
/ Serialize part constraint in DXL format
/
/---------------------------------------------------------------------------
void
CMDPartConstraintGPDB::Serialize(CXMLSerializer *xml_serializer) const
{
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
CDXLTokens::GetDXLTokenStr(EdxltokenPartConstraint));
/ serialize default parts
CWStringDynamic *default_part_array =
CDXLUtils::Serialize(m_mp, m_level_with_default_part_array);
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenDefaultPartition),
default_part_array);
GPOS_DELETE(default_part_array);
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenPartConstraintUnbounded),
m_is_unbounded);
/ serialize the scalar expression
if (nullptr != m_dxl_node)
{
m_dxl_node->SerializeToDXL(xml_serializer);
}
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
CDXLTokens::GetDXLTokenStr(EdxltokenPartConstraint));
GPOS_CHECK_ABORT;
}
/ EOF
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