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Diffstat (limited to '')
| -rw-r--r-- | storage/oqgraph/ha_oqgraph.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/storage/oqgraph/ha_oqgraph.h b/storage/oqgraph/ha_oqgraph.h new file mode 100644 index 00000000..c8e175df --- /dev/null +++ b/storage/oqgraph/ha_oqgraph.h @@ -0,0 +1,143 @@ +/* Copyright (C) 2007-2013 Arjen G Lentz & Antony T Curtis for Open Query + Portions of this file copyright (C) 2000-2006 MySQL AB + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */ + +/* ====================================================================== + Open Query Graph Computation Engine, based on a concept by Arjen Lentz + v3 implementation by Antony Curtis, Arjen Lentz, Andrew McDonnell + For more information, documentation, support, enhancement engineering, + see http://openquery.com/graph or contact graph@openquery.com + ====================================================================== +*/ + +#ifdef USE_PRAGMA_INTERFACE +#pragma interface /* gcc class implementation */ +#endif + +#include "handler.h" +#include "table.h" + +typedef struct oqgraph_info_st OQGRAPH_INFO; +typedef uchar byte; + +namespace open_query +{ + struct row; + class oqgraph; + class oqgraph_share; +} + +/* class for the the Open Query Graph handler */ + +class ha_oqgraph: public handler +{ + TABLE_SHARE share[1]; + bool have_table_share; + TABLE edges[1]; + Field *origid; + Field *destid; + Field *weight; + + open_query::oqgraph_share *graph_share; + open_query::oqgraph *graph; + + int fill_record(byte*, const open_query::row&); + +public: +#if MYSQL_VERSION_ID >= 50100 + ha_oqgraph(handlerton *hton, TABLE_SHARE *table); + ulonglong table_flags() const; +#else + ha_oqgraph(TABLE *table); + Table_flags table_flags() const; +#endif + virtual ~ha_oqgraph(); + const char *index_type(uint inx) + { + return "HASH"; + } + /* Rows also use a fixed-size format */ + enum row_type get_row_type() const { return ROW_TYPE_FIXED; } + ulong index_flags(uint inx, uint part, bool all_parts) const; + const char **bas_ext() const; + uint max_supported_keys() const { return MAX_KEY; } + uint max_supported_key_part_length() const { return MAX_KEY_LENGTH; } + double scan_time() { return (double) 1000000000; } + double read_time(uint index, uint ranges, ha_rows rows) + { return 1; } + + // Doesn't make sense to change the engine on a virtual table. + virtual bool can_switch_engines() { return false; } + + int open(const char *name, int mode, uint test_if_locked); + int close(void); + int write_row(const byte * buf); + int update_row(const uchar * old_data, const uchar * new_data); + int delete_row(const byte * buf); + int index_read(byte * buf, const byte * key, + uint key_len, enum ha_rkey_function find_flag); + int index_read_idx(byte * buf, uint idx, const byte * key, + uint key_len, enum ha_rkey_function find_flag); + int index_next_same(byte * buf, const byte * key, uint key_len); + int rnd_init(bool scan); + int rnd_next(byte *buf); + int rnd_pos(byte * buf, byte *pos); + void position(const byte *record); + int info(uint); + int extra(enum ha_extra_function operation); + int external_lock(THD *thd, int lock_type); + int delete_all_rows(void); + ha_rows records_in_range(uint inx, const key_range *min_key, + const key_range *max_key, page_range *pages); + int delete_table(const char *from); + int rename_table(const char * from, const char * to); + int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info); + void update_create_info(HA_CREATE_INFO *create_info); + + THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to, + enum thr_lock_type lock_type); + int cmp_ref(const byte *ref1, const byte *ref2); + + bool get_error_message(int error, String* buf); + + void fprint_error(const char* fmt, ...); + +#if MYSQL_VERSION_ID < 100000 + // Allow compatibility for build with 5.5.32 + virtual const char *table_type() const { return hton_name(ht)->str; } +#endif + + my_bool register_query_cache_table(THD *thd, const char *table_key, + uint key_length, + qc_engine_callback + *engine_callback, + ulonglong *engine_data) + { + /* + Do not put data from OQGRAPH tables into query cache (because there + is no way to tell whether the data in the backing table has changed or + not) + */ + return FALSE; + } + +private: + + // Various helper functions + int oqgraph_check_table_structure (TABLE *table_arg); + bool validate_oqgraph_table_options(); + void update_key_stats(); + String error_message; +}; |