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+/* 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;
+};