greenplumn CParseHandlerMDGPDBFunc 源码
greenplumn CParseHandlerMDGPDBFunc 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerMDGPDBFunc.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// CParseHandlerMDGPDBFunc.h
//
// @doc:
// SAX parse handler class for GPDB function metadata
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerMDGPDBFunc_H
#define GPDXL_CParseHandlerMDGPDBFunc_H
#include "gpos/base.h"
#include "naucrates/dxl/parser/CParseHandlerMetadataObject.h"
#include "naucrates/md/CMDFunctionGPDB.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
XERCES_CPP_NAMESPACE_USE
//---------------------------------------------------------------------------
// @class:
// CParseHandlerMDGPDBFunc
//
// @doc:
// Parse handler for GPDB function metadata
//
//---------------------------------------------------------------------------
class CParseHandlerMDGPDBFunc : public CParseHandlerMetadataObject
{
private:
// id and version
IMDId *m_mdid;
// name
CMDName *m_mdname;
// result type
IMDId *m_mdid_type_result;
// output argument types
IMdIdArray *m_mdid_types_array;
// whether function returns a set of values
BOOL m_returns_set;
// function stability
CMDFunctionGPDB::EFuncStbl m_func_stability;
// function data access
CMDFunctionGPDB::EFuncDataAcc m_func_data_access;
// function strictness (i.e. whether func returns NULL on NULL input)
BOOL m_is_strict;
BOOL m_is_ndv_preserving;
BOOL m_is_allowed_for_PS;
// process the start of an element
void StartElement(
const XMLCh *const element_uri, // URI of element's namespace
const XMLCh *const element_local_name, // local part of element's name
const XMLCh *const element_qname, // element's qname
const Attributes &attr // element's attributes
) override;
// process the end of an element
void EndElement(
const XMLCh *const element_uri, // URI of element's namespace
const XMLCh *const element_local_name, // local part of element's name
const XMLCh *const element_qname // element's qname
) override;
// parse function stability property from XML string
static CMDFunctionGPDB::EFuncStbl ParseFuncStability(const XMLCh *xml_val);
// parse function data access property from XML string
static CMDFunctionGPDB::EFuncDataAcc ParseFuncDataAccess(
const XMLCh *xml_val);
public:
CParseHandlerMDGPDBFunc(const CParseHandlerMDGPDBFunc &) = delete;
// ctor
CParseHandlerMDGPDBFunc(CMemoryPool *mp,
CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
};
} // namespace gpdxl
#endif // !GPDXL_CParseHandlerMDGPDBFunc_H
// EOF
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