greenplumn CDXLScalarAssertConstraint 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLScalarAssertConstraint.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2015 VMware, Inc. or its affiliates.
/
/ @filename:
/ CDXLScalarAssertConstraint.cpp
/
/ @doc:
/ Implementation of DXL scalar assert predicate
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLScalarAssertConstraint.h"
#include "gpopt/mdcache/CMDAccessor.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarAssertConstraint::CDXLScalarAssertConstraint
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CDXLScalarAssertConstraint::CDXLScalarAssertConstraint(CMemoryPool *mp,
CWStringBase *error_msg)
: CDXLScalar(mp), m_error_msg(error_msg)
{
GPOS_ASSERT(nullptr != error_msg);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarAssertConstraint::~CDXLScalarAssertConstraint
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CDXLScalarAssertConstraint::~CDXLScalarAssertConstraint()
{
GPOS_DELETE(m_error_msg);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarAssertConstraint::GetDXLOperator
/
/ @doc:
/ Operator type
/
/---------------------------------------------------------------------------
Edxlopid
CDXLScalarAssertConstraint::GetDXLOperator() const
{
return EdxlopScalarAssertConstraint;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarAssertConstraint::GetOpNameStr
/
/ @doc:
/ Operator name
/
/---------------------------------------------------------------------------
const CWStringConst *
CDXLScalarAssertConstraint::GetOpNameStr() const
{
return CDXLTokens::GetDXLTokenStr(EdxltokenScalarAssertConstraint);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarAssertConstraint::PstrErrorMsg
/
/ @doc:
/ Error message
/
/---------------------------------------------------------------------------
CWStringBase *
CDXLScalarAssertConstraint::GetErrorMsgStr() const
{
return m_error_msg;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarAssertConstraint::SerializeToDXL
/
/ @doc:
/ Serialize operator in DXL format
/
/---------------------------------------------------------------------------
void
CDXLScalarAssertConstraint::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const
{
const CWStringConst *element_name = GetOpNameStr();
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenErrorMessage), m_error_msg);
dxlnode->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
#ifdef GPOS_DEBUG
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarAssertConstraint::AssertValid
/
/ @doc:
/ Checks whether operator node is well-structured
/
/---------------------------------------------------------------------------
void
CDXLScalarAssertConstraint::AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const
{
GPOS_ASSERT(1 == dxlnode->Arity());
CDXLNode *child_dxlnode = (*dxlnode)[0];
GPOS_ASSERT(EdxloptypeScalar ==
child_dxlnode->GetOperator()->GetDXLOperatorType());
if (validate_children)
{
child_dxlnode->GetOperator()->AssertValid(child_dxlnode,
validate_children);
}
}
#endif / GPOS_DEBUG
/ EOF
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