greenplumn CDXLPhysicalAgg 源码
greenplumn CDXLPhysicalAgg 代码
文件路径:/src/backend/gporca/libnaucrates/src/operators/CDXLPhysicalAgg.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CDXLPhysicalAgg.cpp
//
// @doc:
// Implementation of DXL physical aggregate operator
//---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLPhysicalAgg.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::CDXLPhysicalAgg
//
// @doc:
// Constructor
//
//---------------------------------------------------------------------------
CDXLPhysicalAgg::CDXLPhysicalAgg(CMemoryPool *mp,
EdxlAggStrategy dxl_agg_strategy,
BOOL stream_safe)
: CDXLPhysical(mp),
m_grouping_colids_array(nullptr),
m_dxl_agg_strategy(dxl_agg_strategy),
m_stream_safe(stream_safe)
{
GPOS_ASSERT_IMP(stream_safe, (EdxlaggstrategyHashed == dxl_agg_strategy));
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::~CDXLPhysicalAgg
//
// @doc:
// Destructor
//
//---------------------------------------------------------------------------
CDXLPhysicalAgg::~CDXLPhysicalAgg()
{
CRefCount::SafeRelease(m_grouping_colids_array);
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::GetDXLOperator
//
// @doc:
// Operator type
//
//---------------------------------------------------------------------------
Edxlopid
CDXLPhysicalAgg::GetDXLOperator() const
{
return EdxlopPhysicalAgg;
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::GetAggStrategy
//
// @doc:
// Aggregation strategy
//
//---------------------------------------------------------------------------
EdxlAggStrategy
CDXLPhysicalAgg::GetAggStrategy() const
{
return m_dxl_agg_strategy;
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::GetOpNameStr
//
// @doc:
// Operator name
//
//---------------------------------------------------------------------------
const CWStringConst *
CDXLPhysicalAgg::GetOpNameStr() const
{
return CDXLTokens::GetDXLTokenStr(EdxltokenPhysicalAggregate);
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::GetAggStrategyNameStr
//
// @doc:
// Operator name
//
//---------------------------------------------------------------------------
const CWStringConst *
CDXLPhysicalAgg::GetAggStrategyNameStr() const
{
switch (m_dxl_agg_strategy)
{
case EdxlaggstrategyPlain:
return CDXLTokens::GetDXLTokenStr(EdxltokenAggStrategyPlain);
case EdxlaggstrategySorted:
return CDXLTokens::GetDXLTokenStr(EdxltokenAggStrategySorted);
case EdxlaggstrategyHashed:
return CDXLTokens::GetDXLTokenStr(EdxltokenAggStrategyHashed);
default:
GPOS_ASSERT(!"Unrecognized aggregation strategy");
return nullptr;
}
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::GetGroupingColidArray
//
// @doc:
// Grouping column indices
//
//---------------------------------------------------------------------------
const ULongPtrArray *
CDXLPhysicalAgg::GetGroupingColidArray() const
{
return m_grouping_colids_array;
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::SetGroupingCols
//
// @doc:
// Sets array of grouping columns
//
//---------------------------------------------------------------------------
void
CDXLPhysicalAgg::SetGroupingCols(ULongPtrArray *grouping_colids_array)
{
GPOS_ASSERT(nullptr != grouping_colids_array);
m_grouping_colids_array = grouping_colids_array;
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::SerializeGroupingColsToDXL
//
// @doc:
// Serialize grouping column indices in DXL format
//
//---------------------------------------------------------------------------
void
CDXLPhysicalAgg::SerializeGroupingColsToDXL(
CXMLSerializer *xml_serializer) const
{
GPOS_ASSERT(nullptr != m_grouping_colids_array);
const CWStringConst *grouping_cols_str =
CDXLTokens::GetDXLTokenStr(EdxltokenGroupingCols);
const CWStringConst *grouping_col_str =
CDXLTokens::GetDXLTokenStr(EdxltokenGroupingCol);
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
grouping_cols_str);
for (ULONG idx = 0; idx < m_grouping_colids_array->Size(); idx++)
{
GPOS_ASSERT(nullptr != (*m_grouping_colids_array)[idx]);
ULONG grouping_colid = *((*m_grouping_colids_array)[idx]);
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
grouping_col_str);
xml_serializer->AddAttribute(CDXLTokens::GetDXLTokenStr(EdxltokenColId),
grouping_colid);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
grouping_col_str);
}
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix),
grouping_cols_str);
}
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::SerializeToDXL
//
// @doc:
// Serialize operator in DXL format
//
//---------------------------------------------------------------------------
void
CDXLPhysicalAgg::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const
{
const CWStringConst *element_name = GetOpNameStr();
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenAggStrategy),
GetAggStrategyNameStr());
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenAggStreamSafe), m_stream_safe);
// serialize properties
node->SerializePropertiesToDXL(xml_serializer);
SerializeGroupingColsToDXL(xml_serializer);
// serialize children
node->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
#ifdef GPOS_DEBUG
//---------------------------------------------------------------------------
// @function:
// CDXLPhysicalAgg::AssertValid
//
// @doc:
// Checks whether operator node is well-structured
//
//---------------------------------------------------------------------------
void
CDXLPhysicalAgg::AssertValid(const CDXLNode *node, BOOL validate_children) const
{
// assert proj list and filter are valid
CDXLPhysical::AssertValid(node, validate_children);
GPOS_ASSERT((EdxlaggstrategySentinel > m_dxl_agg_strategy) &&
(EdxlaggstrategyPlain <= m_dxl_agg_strategy));
GPOS_ASSERT(EdxlaggIndexSentinel == node->Arity());
GPOS_ASSERT(nullptr != m_grouping_colids_array);
CDXLNode *child_dxlnode = (*node)[EdxlaggIndexChild];
GPOS_ASSERT(EdxloptypePhysical ==
child_dxlnode->GetOperator()->GetDXLOperatorType());
if (validate_children)
{
child_dxlnode->GetOperator()->AssertValid(child_dxlnode,
validate_children);
}
}
#endif // GPOS_DEBUG
// EOF
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