greenplumn CParseHandlerMDRelation 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerMDRelation.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 Greenplum, Inc.
/
/ @filename:
/ CParseHandlerMDRelation.h
/
/ @doc:
/ SAX parse handler class for relation metadata
/---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerMDRelation_H
#define GPDXL_CParseHandlerMDRelation_H
#include "gpos/base.h"
#include "naucrates/dxl/parser/CParseHandlerMetadataObject.h"
#include "naucrates/dxl/xml/dxltokens.h"
#include "naucrates/md/CMDPartConstraintGPDB.h"
#include "naucrates/md/CMDRelationGPDB.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
XERCES_CPP_NAMESPACE_USE
/---------------------------------------------------------------------------
/ @class:
/ CParseHandlerMDRelation
/
/ @doc:
/ Parse handler for relation metadata
/
/---------------------------------------------------------------------------
class CParseHandlerMDRelation : public CParseHandlerMetadataObject
{
protected:
/ id and version of the relation
IMDId *m_mdid;
/ schema name
CMDName *m_mdname_schema;
/ table name
CMDName *m_mdname;
/ is this a temporary relation
BOOL m_is_temp_table;
/ storage type
IMDRelation::Erelstoragetype m_rel_storage_type;
/ distribution policy
IMDRelation::Ereldistrpolicy m_rel_distr_policy;
/ distribution columns
ULongPtrArray *m_distr_col_array;
/ do we need to consider a hash distributed table as random distributed
BOOL m_convert_hash_to_random;
/ partition keys
ULongPtrArray *m_partition_cols_array;
/ partition types
CharPtrArray *m_str_part_types_array;
/ number of partitions
ULONG m_num_of_partitions;
/ key sets
ULongPtr2dArray *m_key_sets_arrays;
/ part constraint
CDXLNode *m_part_constraint;
/ distribution opfamilies parse handler
CParseHandlerBase *m_opfamilies_parse_handler;
/ child partition oids parse handler
CParseHandlerBase *m_child_partitions_parse_handler;
/ is part constraint unbounded
BOOL m_part_constraint_unbounded;
/ helper function to parse main relation attributes: name, id,
/ distribution policy and keys
void ParseRelationAttributes(const Attributes &attrs,
Edxltoken target_elem);
/ create and activate the parse handler for the children nodes
void ParseChildNodes();
private:
/ 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;
public:
CParseHandlerMDRelation(const CParseHandlerMDRelation &) = delete;
/ ctor
CParseHandlerMDRelation(CMemoryPool *mp,
CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
};
} / namespace gpdxl
#endif / !GPDXL_CParseHandlerMDRelation_H
/ EOF
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