greenplumn CDXLScalarBoolExpr 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLScalarBoolExpr.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2010 Greenplum, Inc.
/
/ @filename:
/ CDXLScalarBoolExpr.cpp
/
/ @doc:
/ Implementation of DXL BoolExpr
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLScalarBoolExpr.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
#include "naucrates/dxl/xml/dxltokens.h"
using namespace gpos;
using namespace gpdxl;
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarBoolExpr::CDXLScalarBoolExpr
/
/ @doc:
/ Constructs a BoolExpr node
/
/---------------------------------------------------------------------------
CDXLScalarBoolExpr::CDXLScalarBoolExpr(CMemoryPool *mp,
const EdxlBoolExprType bool_type)
: CDXLScalar(mp), m_bool_type(bool_type)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarBoolExpr::GetDXLOperator
/
/ @doc:
/ Operator type
/
/---------------------------------------------------------------------------
Edxlopid
CDXLScalarBoolExpr::GetDXLOperator() const
{
return EdxlopScalarBoolExpr;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarBoolExpr::GetDxlBoolTypeStr
/
/ @doc:
/ Boolean expression type
/
/---------------------------------------------------------------------------
EdxlBoolExprType
CDXLScalarBoolExpr::GetDxlBoolTypeStr() const
{
return m_bool_type;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarBoolExpr::GetOpNameStr
/
/ @doc:
/ Operator name
/
/---------------------------------------------------------------------------
const CWStringConst *
CDXLScalarBoolExpr::GetOpNameStr() const
{
switch (m_bool_type)
{
case Edxland:
return CDXLTokens::GetDXLTokenStr(EdxltokenScalarBoolAnd);
case Edxlor:
return CDXLTokens::GetDXLTokenStr(EdxltokenScalarBoolOr);
case Edxlnot:
return CDXLTokens::GetDXLTokenStr(EdxltokenScalarBoolNot);
default:
return nullptr;
}
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarBoolExpr::SerializeToDXL
/
/ @doc:
/ Serialize operator in DXL format
/
/---------------------------------------------------------------------------
void
CDXLScalarBoolExpr::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const
{
GPOS_CHECK_ABORT;
const CWStringConst *element_name = GetOpNameStr();
GPOS_ASSERT(nullptr != element_name);
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
dxlnode->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
GPOS_CHECK_ABORT;
}
#ifdef GPOS_DEBUG
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarBoolExpr::AssertValid
/
/ @doc:
/ Checks whether operator node is well-structured
/
/---------------------------------------------------------------------------
void
CDXLScalarBoolExpr::AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const
{
EdxlBoolExprType dxl_bool_type =
((CDXLScalarBoolExpr *) dxlnode->GetOperator())->GetDxlBoolTypeStr();
GPOS_ASSERT((dxl_bool_type == Edxlnot) || (dxl_bool_type == Edxlor) ||
(dxl_bool_type == Edxland));
const ULONG arity = dxlnode->Arity();
if (dxl_bool_type == Edxlnot)
{
GPOS_ASSERT(1 == arity);
}
else
{
GPOS_ASSERT(2 <= arity);
}
for (ULONG ul = 0; ul < arity; ++ul)
{
CDXLNode *dxlnode_arg = (*dxlnode)[ul];
GPOS_ASSERT(EdxloptypeScalar ==
dxlnode_arg->GetOperator()->GetDXLOperatorType());
if (validate_children)
{
dxlnode_arg->GetOperator()->AssertValid(dxlnode_arg,
validate_children);
}
}
}
#endif / GPOS_DEBUG
/ EOF
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