greenplumn CParseHandlerAssert 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerAssert.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CParseHandlerAssert.cpp
/
/ @doc:
/ Implementation of the SAX parse handler class for parsing physical
/ assert operators
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerAssert.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerProjList.h"
#include "naucrates/dxl/parser/CParseHandlerProperties.h"
#include "naucrates/dxl/parser/CParseHandlerScalarAssertConstraintList.h"
#include "naucrates/dxl/parser/CParseHandlerUtils.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerAssert::CParseHandlerAssert
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CParseHandlerAssert::CParseHandlerAssert(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerPhysicalOp(mp, parse_handler_mgr, parse_handler_root)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerAssert::StartElement
/
/ @doc:
/ Invoked by Xerces to process an opening tag
/
/---------------------------------------------------------------------------
void
CParseHandlerAssert::StartElement(const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const, / element_qname,
const Attributes &attrs)
{
if (0 != XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenPhysicalAssert),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
CHAR *error_code = CDXLOperatorFactory::ExtractConvertAttrValueToSz(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs, EdxltokenErrorCode,
EdxltokenPhysicalAssert);
if (nullptr == error_code ||
GPOS_SQLSTATE_LENGTH != clib::Strlen(error_code))
{
GPOS_RAISE(
gpdxl::ExmaDXL, gpdxl::ExmiDXLInvalidAttributeValue,
CDXLTokens::GetDXLTokenStr(EdxltokenPhysicalAssert)->GetBuffer(),
CDXLTokens::GetDXLTokenStr(EdxltokenErrorCode)->GetBuffer());
}
m_dxl_op = GPOS_NEW(m_mp) CDXLPhysicalAssert(m_mp, error_code);
/ ctor created a copy of the error code
GPOS_DELETE_ARRAY(error_code);
/ parse handler for child node
CParseHandlerBase *child_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenPhysical),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(child_parse_handler);
/ parse handler for the predicate
CParseHandlerBase *assert_pred_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenScalarAssertConstraintList),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(assert_pred_parse_handler);
/ parse handler for the proj list
CParseHandlerBase *proj_list_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenScalarProjList),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(proj_list_parse_handler);
/parse handler for the properties of the operator
CParseHandlerBase *prop_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenProperties),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(prop_parse_handler);
this->Append(prop_parse_handler);
this->Append(proj_list_parse_handler);
this->Append(assert_pred_parse_handler);
this->Append(child_parse_handler);
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerAssert::EndElement
/
/ @doc:
/ Invoked by Xerces to process a closing tag
/
/---------------------------------------------------------------------------
void
CParseHandlerAssert::EndElement(const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 != XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenPhysicalAssert),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
/ construct node from the created child nodes
CParseHandlerProperties *prop_parse_handler =
dynamic_cast<CParseHandlerProperties *>((*this)[0]);
CParseHandlerProjList *proj_list_parse_handler =
dynamic_cast<CParseHandlerProjList *>((*this)[1]);
CParseHandlerScalarAssertConstraintList *assert_pred_parse_handler =
dynamic_cast<CParseHandlerScalarAssertConstraintList *>((*this)[2]);
CParseHandlerPhysicalOp *child_parse_handler =
dynamic_cast<CParseHandlerPhysicalOp *>((*this)[3]);
m_dxl_node = GPOS_NEW(m_mp) CDXLNode(m_mp, m_dxl_op);
CParseHandlerUtils::SetProperties(m_dxl_node, prop_parse_handler);
/ add constructed children
AddChildFromParseHandler(proj_list_parse_handler);
AddChildFromParseHandler(assert_pred_parse_handler);
AddChildFromParseHandler(child_parse_handler);
#ifdef GPOS_DEBUG
m_dxl_op->AssertValid(m_dxl_node, false /* validate_children */);
#endif / GPOS_DEBUG
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
/ EOF
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