greenplumn CDXLPhysicalValuesScan 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLPhysicalValuesScan.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2017 VMware, Inc. or its affiliates.
/
/ @filename:
/ CDXLPhysicalValuesScan.cpp
/
/ @doc:
/ Implementation of DXL physical values scan operator
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLPhysicalValuesScan.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
/ ctor
CDXLPhysicalValuesScan::CDXLPhysicalValuesScan(CMemoryPool *mp)
: CDXLPhysical(mp)
{
}
/ dtor
CDXLPhysicalValuesScan::~CDXLPhysicalValuesScan() = default;
/ operator type
Edxlopid
CDXLPhysicalValuesScan::GetDXLOperator() const
{
return EdxlopPhysicalValuesScan;
}
/ operator name
const CWStringConst *
CDXLPhysicalValuesScan::GetOpNameStr() const
{
return CDXLTokens::GetDXLTokenStr(EdxltokenPhysicalValuesScan);
}
CDXLPhysicalValuesScan *
CDXLPhysicalValuesScan::Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopPhysicalValuesScan == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLPhysicalValuesScan *>(dxl_op);
}
/ serialize operator in DXL format
void
CDXLPhysicalValuesScan::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const
{
const CWStringConst *element_name = GetOpNameStr();
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
/ serialize properties
dxlnode->SerializePropertiesToDXL(xml_serializer);
/ serialize children
dxlnode->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
#ifdef GPOS_DEBUG
/ checks whether operator node is well-structured
void
CDXLPhysicalValuesScan::AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const
{
GPOS_ASSERT(EdxloptypePhysical ==
dxlnode->GetOperator()->GetDXLOperatorType());
const ULONG arity = dxlnode->Arity();
GPOS_ASSERT(EdxlValIndexSentinel <= arity);
for (ULONG ul = 0; ul < arity; ul++)
{
CDXLNode *child_dxlnode = (*dxlnode)[ul];
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
相关文章
greenplumn CDXLCtasStorageOptions 源码