greenplumn CParseHandlerMDRelationCtas 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerMDRelationCtas.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CParseHandlerMDRelationCtas.cpp
/
/ @doc:
/ Implementation of the SAX parse handler class for parsing CTAS
/ relation metadata.
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerMDRelationCtas.h"
#include "naucrates/dxl/operators/CDXLCtasStorageOptions.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerCtasStorageOptions.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
#include "naucrates/dxl/parser/CParseHandlerMetadataColumns.h"
#include "naucrates/dxl/parser/CParseHandlerMetadataIdList.h"
#include "naucrates/dxl/parser/CParseHandlerScalarOp.h"
#include "naucrates/md/CMDRelationCtasGPDB.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRelationCtas::CParseHandlerMDRelationCtas
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CParseHandlerMDRelationCtas::CParseHandlerMDRelationCtas(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerMDRelation(mp, parse_handler_mgr, parse_handler_root),
m_vartypemod_array(nullptr)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRelationCtas::StartElement
/
/ @doc:
/ Invoked by Xerces to process an opening tag
/
/---------------------------------------------------------------------------
void
CParseHandlerMDRelationCtas::StartElement(const XMLCh *const,
const XMLCh *const element_local_name,
const XMLCh *const,
const Attributes &attrs)
{
if (0 !=
XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenRelationCTAS),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
/ parse main relation attributes: name, id, distribution policy and keys
ParseRelationAttributes(attrs, EdxltokenRelation);
GPOS_ASSERT(IMDId::EmdidGPDBCtas == m_mdid->MdidType());
const XMLCh *xml_str_schema =
attrs.getValue(CDXLTokens::XmlstrToken(EdxltokenSchema));
if (nullptr != xml_str_schema)
{
m_mdname_schema = CDXLUtils::CreateMDNameFromXMLChar(
m_parse_handler_mgr->GetDXLMemoryManager(), xml_str_schema);
}
/ parse whether relation is temporary
m_is_temp_table = CDXLOperatorFactory::ExtractConvertAttrValueToBool(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs,
EdxltokenRelTemporary, EdxltokenRelation);
/ parse storage type
const XMLCh *xml_str_storage_type = CDXLOperatorFactory::ExtractAttrValue(
attrs, EdxltokenRelStorageType, EdxltokenRelation);
m_rel_storage_type =
CDXLOperatorFactory::ParseRelationStorageType(xml_str_storage_type);
/ parse vartypemod
const XMLCh *vartypemod_xml = CDXLOperatorFactory::ExtractAttrValue(
attrs, EdxltokenVarTypeModList, EdxltokenRelation);
m_vartypemod_array = CDXLOperatorFactory::ExtractIntsToIntArray(
m_parse_handler_mgr->GetDXLMemoryManager(), vartypemod_xml,
EdxltokenVarTypeModList, EdxltokenRelation);
/ parse handler for distr opclasses
CParseHandlerBase *opclasses_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenMetadataIdList),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(opclasses_parse_handler);
/ parse handler for distr opfamilies
CParseHandlerBase *opfamilies_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenMetadataIdList),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(opfamilies_parse_handler);
/parse handler for the storage options
CParseHandlerBase *ctas_options_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenCTASOptions),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(ctas_options_parse_handler);
/ parse handler for the columns
CParseHandlerBase *columns_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenMetadataColumns),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(columns_parse_handler);
/ store parse handlers
this->Append(columns_parse_handler);
this->Append(ctas_options_parse_handler);
this->Append(opfamilies_parse_handler);
this->Append(opclasses_parse_handler);
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRelationCtas::EndElement
/
/ @doc:
/ Invoked by Xerces to process a closing tag
/
/---------------------------------------------------------------------------
void
CParseHandlerMDRelationCtas::EndElement(const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 !=
XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenRelationCTAS),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
CParseHandlerMetadataColumns *md_cols_parse_handler =
dynamic_cast<CParseHandlerMetadataColumns *>((*this)[0]);
CParseHandlerCtasStorageOptions *ctas_options_parse_handler =
dynamic_cast<CParseHandlerCtasStorageOptions *>((*this)[1]);
CParseHandlerMetadataIdList *opfamilies_parse_handler =
dynamic_cast<CParseHandlerMetadataIdList *>((*this)[2]);
CParseHandlerMetadataIdList *opclasses_parse_handler =
dynamic_cast<CParseHandlerMetadataIdList *>((*this)[3]);
GPOS_ASSERT(nullptr != md_cols_parse_handler->GetMdColArray());
GPOS_ASSERT(nullptr !=
ctas_options_parse_handler->GetDxlCtasStorageOption());
GPOS_ASSERT(nullptr != opfamilies_parse_handler->GetMdIdArray());
GPOS_ASSERT(nullptr != opclasses_parse_handler->GetMdIdArray());
CMDColumnArray *md_col_array = md_cols_parse_handler->GetMdColArray();
CDXLCtasStorageOptions *dxl_ctas_storage_options =
ctas_options_parse_handler->GetDxlCtasStorageOption();
md_col_array->AddRef();
dxl_ctas_storage_options->AddRef();
IMdIdArray *distr_opfamilies =
dynamic_cast<CParseHandlerMetadataIdList *>(opfamilies_parse_handler)
->GetMdIdArray();
distr_opfamilies->AddRef();
IMdIdArray *distr_opclasses =
dynamic_cast<CParseHandlerMetadataIdList *>(opclasses_parse_handler)
->GetMdIdArray();
distr_opclasses->AddRef();
m_imd_obj = GPOS_NEW(m_mp) CMDRelationCtasGPDB(
m_mp, m_mdid, m_mdname_schema, m_mdname, m_is_temp_table,
m_rel_storage_type, m_rel_distr_policy, md_col_array, m_distr_col_array,
distr_opfamilies, distr_opclasses, m_key_sets_arrays,
dxl_ctas_storage_options, m_vartypemod_array);
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
/ EOF
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