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mariadb/storage/oqgraph/ha_oqgraph.cc
Arjen Lentz d0e852a723 Removed old oqgraph v1 files (graphstore.*) 
Updated oqgraph copyright, version and author info.
2013-02-28 10:16:29 +10:00

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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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_IMPLEMENTATION
#pragma implementation // gcc: Class implementation
#endif
#include <stdarg.h>
#include <stdio.h>
#include <mysql_version.h>
#include "ha_oqgraph.h"
#include "graphcore.h"
#define MYSQL_SERVER // to have THD
#include <mysql/plugin.h>
#include "table.h"
#include "field.h"
#include "key.h"
#include "unireg.h"
#include "sql_class.h"
#include "my_dbug.h"
#define OQGRAPH_STATS_UPDATE_THRESHOLD 10
using namespace open_query;
struct oqgraph_table_option_struct
{
char *table_name;
char *origid; // name of the origin id column
char *destid; // name of the target id column
char *weight; // name of the weight column (optional)
};
#define ha_table_option_struct oqgraph_table_option_struct
static const ha_create_table_option oqgraph_table_option_list[]=
{
HA_TOPTION_STRING("data_table", table_name),
HA_TOPTION_STRING("origid", origid),
HA_TOPTION_STRING("destid", destid),
HA_TOPTION_STRING("weight", weight),
HA_TOPTION_END
};
static const char oqgraph_description[]=
"Open Query Graph Computation Engine "
"(http://openquery.com/graph)";
#if MYSQL_VERSION_ID < 50100
static bool oqgraph_init();
handlerton oqgraph_hton= {
"OQGRAPH",
SHOW_OPTION_YES,
oqgraph_description,
DB_TYPE_OQGRAPH,
oqgraph_init,
0, /* slot */
0, /* savepoint size. */
NULL, /* close_connection */
NULL, /* savepoint */
NULL, /* rollback to savepoint */
NULL, /* release savepoint */
NULL, /* commit */
NULL, /* rollback */
NULL, /* prepare */
NULL, /* recover */
NULL, /* commit_by_xid */
NULL, /* rollback_by_xid */
NULL, /* create_cursor_read_view */
NULL, /* set_cursor_read_view */
NULL, /* close_cursor_read_view */
HTON_NO_FLAGS
};
#define STATISTIC_INCREMENT(X) \
statistic_increment(table->in_use->status_var.X, &LOCK_status)
#define MOVE(X) move_field(X)
#define RECORDS records
#else
#define STATISTIC_INCREMENT(X) /* nothing */
#define MOVE(X) move_field_offset(X)
#define RECORDS stats.records
#endif
static bool oqgraph_init_done= 0;
static handler* oqgraph_create_handler(handlerton *hton, TABLE_SHARE *table,
MEM_ROOT *mem_root)
{
DBUG_PRINT( "oq-debug", ("oqgraph_create_handler"));
return new (mem_root) ha_oqgraph(hton, table);
}
#if MYSQL_VERSION_ID >= 50100
static int oqgraph_init(handlerton *hton)
{
#else
static bool oqgraph_init()
{
if (have_oqgraph == SHOW_OPTION_DISABLED)
return 1;
#endif
DBUG_PRINT( "oq-debug", ("oqgraph_init"));
#if MYSQL_VERSION_ID >= 50100
hton->state= SHOW_OPTION_YES;
hton->db_type= DB_TYPE_AUTOASSIGN;
hton->create= oqgraph_create_handler;
hton->flags= HTON_NO_FLAGS;
hton->table_options= oqgraph_table_option_list;
oqgraph_init_done= TRUE;
return 0;
}
static int oqgraph_fini(void *)
{
DBUG_PRINT( "oq-debug", ("oqgraph_fini"));
oqgraph_init_done= FALSE;
#endif
return 0;
}
static int error_code(int res)
{
switch (res)
{
case oqgraph::OK:
return 0;
case oqgraph::NO_MORE_DATA:
return HA_ERR_END_OF_FILE;
case oqgraph::EDGE_NOT_FOUND:
return HA_ERR_KEY_NOT_FOUND;
case oqgraph::INVALID_WEIGHT:
return HA_ERR_AUTOINC_ERANGE;
case oqgraph::DUPLICATE_EDGE:
return HA_ERR_FOUND_DUPP_KEY;
case oqgraph::CANNOT_ADD_VERTEX:
case oqgraph::CANNOT_ADD_EDGE:
return HA_ERR_RECORD_FILE_FULL;
case oqgraph::MISC_FAIL:
default:
return HA_ERR_CRASHED_ON_USAGE;
}
}
/**
* Check if table complies with our designated structure
*
* ColName Type Attributes
* ======= ======== =============
* latch SMALLINT UNSIGNED NULL
* origid BIGINT UNSIGNED NULL
* destid BIGINT UNSIGNED NULL
* weight DOUBLE NULL
* seq BIGINT UNSIGNED NULL
* linkid BIGINT UNSIGNED NULL
* =================================
*
CREATE TABLE foo (
latch SMALLINT UNSIGNED NULL,
origid BIGINT UNSIGNED NULL,
destid BIGINT UNSIGNED NULL,
weight DOUBLE NULL,
seq BIGINT UNSIGNED NULL,
linkid BIGINT UNSIGNED NULL,
KEY (latch, origid, destid) USING HASH,
KEY (latch, destid, origid) USING HASH
) ENGINE=OQGRAPH
READ_TABLE=bar
ORIGID=src_id
DESTID=tgt_id
*/
static int oqgraph_check_table_structure (TABLE *table_arg)
{
int i;
struct { const char *colname; int coltype; } skel[] = {
{ "latch" , MYSQL_TYPE_SHORT },
{ "origid", MYSQL_TYPE_LONGLONG },
{ "destid", MYSQL_TYPE_LONGLONG },
{ "weight", MYSQL_TYPE_DOUBLE },
{ "seq" , MYSQL_TYPE_LONGLONG },
{ "linkid", MYSQL_TYPE_LONGLONG },
{ NULL , 0}
};
DBUG_ENTER("ha_oqgraph::table_structure_ok");
Field **field= table_arg->field;
for (i= 0; *field && skel[i].colname; i++, field++) {
/* Check Column Type */
if ((*field)->type() != skel[i].coltype)
DBUG_RETURN(-1);
if (skel[i].coltype != MYSQL_TYPE_DOUBLE) {
/* Check Is UNSIGNED */
if (!((*field)->flags & UNSIGNED_FLAG ))
DBUG_RETURN(-1);
}
/* Check THAT NOT NULL isn't set */
if ((*field)->flags & NOT_NULL_FLAG)
DBUG_RETURN(-1);
/* Check the column name */
if (strcmp(skel[i].colname,(*field)->field_name))
DBUG_RETURN(-1);
}
if (skel[i].colname || *field || !table_arg->key_info || !table_arg->s->keys)
DBUG_RETURN(-1);
KEY *key= table_arg->key_info;
for (uint i= 0; i < table_arg->s->keys; ++i, ++key)
{
Field **field= table_arg->field;
/* check that the first key part is the latch and it is a hash key */
if (!(field[0] == key->key_part[0].field &&
HA_KEY_ALG_HASH == key->algorithm))
DBUG_RETURN(-1);
if (key->key_parts == 3)
{
/* KEY (latch, origid, destid) USING HASH */
/* KEY (latch, destid, origid) USING HASH */
if (!(field[1] == key->key_part[1].field &&
field[2] == key->key_part[2].field) &&
!(field[1] == key->key_part[2].field &&
field[2] == key->key_part[1].field))
DBUG_RETURN(-1);
}
else
DBUG_RETURN(-1);
}
DBUG_RETURN(0);
}
/*****************************************************************************
** OQGRAPH tables
*****************************************************************************/
ha_oqgraph::ha_oqgraph(handlerton *hton, TABLE_SHARE *table_arg)
: handler(hton, table_arg)
, graph_share(0)
, graph(0)
, error_message("", 0, &my_charset_latin1)
{ }
ha_oqgraph::~ha_oqgraph()
{ }
static const char *ha_oqgraph_exts[] =
{
NullS
};
const char **ha_oqgraph::bas_ext() const
{
return ha_oqgraph_exts;
}
ulonglong ha_oqgraph::table_flags() const
{
return (HA_NO_BLOBS | HA_NULL_IN_KEY |
HA_REC_NOT_IN_SEQ | HA_CAN_INSERT_DELAYED |
HA_BINLOG_STMT_CAPABLE | HA_BINLOG_ROW_CAPABLE);
}
ulong ha_oqgraph::index_flags(uint inx, uint part, bool all_parts) const
{
return HA_ONLY_WHOLE_INDEX | HA_KEY_SCAN_NOT_ROR;
}
bool ha_oqgraph::get_error_message(int error, String* buf)
{
if (error < 0)
{
buf->append(error_message);
buf->c_ptr_safe();
error_message.length(0);
}
return false;
}
void ha_oqgraph::fprint_error(const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
error_message.reserve(256);
size_t len = error_message.length();
len += vsnprintf(&error_message[len], 255, fmt, ap);
error_message.length(len);
va_end(ap);
}
int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
{
DBUG_PRINT( "oq-debug", ("open(name=%s,mode=%d)", name, mode));
THD* thd = current_thd;
oqgraph_table_option_struct *options=
reinterpret_cast<oqgraph_table_option_struct*>(table->s->option_struct);
// Catch cases where table was not constructed properly
if (!options) {
fprint_error("Invalid oqgraph backing store (null attributes)");
return -1;
}
if (!options->table_name) {
fprint_error("Invalid oqgraph backing store (unspecified data_table attribute)");
// if table_name if present but doesnt actually exist, we will fail out below
// when we call open_table_def(). same probably applies for the id fields
return -1;
}
if (!options->origid) {
fprint_error("Invalid oqgraph backing store (unspecified origid attribute)");
return -1;
}
if (!options->destid) {
fprint_error("Invalid oqgraph backing store (unspecified destid attribute)");
return -1;
}
// weight is optional
error_message.length(0);
const char* p= strend(name)-1;
while (p > name && *p != '\\' && *p != '/')
--p;
init_tmp_table_share(
thd, share, table->s->db.str, table->s->db.length,
options->table_name, "");
size_t tlen= strlen(options->table_name);
size_t plen= (int)(p - name) + tlen + 1;
share->path.str= (char*)
alloc_root(&share->mem_root, plen);
strmov(strnmov(share->path.str, name, (int)(p - name) + 1), options->table_name);
share->normalized_path.str= share->path.str;
share->path.length= share->normalized_path.length= plen;
origid= destid= weight= 0;
DBUG_PRINT( "oq-debug", ("share:(normalized_path=%s,path.length=%zu)",
share->normalized_path.str, share->path.length));
while (open_table_def(thd, share, 0))
{
if (thd->is_error() && thd->stmt_da->sql_errno() != ER_NO_SUCH_TABLE)
{
free_table_share(share);
return thd->stmt_da->sql_errno();
}
if (ha_create_table_from_engine(thd, table->s->db.str, options->table_name))
{
free_table_share(share);
return thd->stmt_da->sql_errno();
}
/*mysql_reset_errors(thd, 1);*/
thd->clear_error();
continue;
}
if (int err= share->error)
{
open_table_error(share, share->error, share->open_errno, share->errarg);
free_table_share(share);
return err;
}
if (share->is_view)
{
open_table_error(share, 1, EMFILE, 0);
free_table_share(share);
fprint_error("VIEWs are not supported for a backing store");
return -1;
}
if (int err= open_table_from_share(thd, share, "",
(uint) (HA_OPEN_KEYFILE | HA_OPEN_RNDFILE |
HA_GET_INDEX | HA_TRY_READ_ONLY),
READ_KEYINFO | COMPUTE_TYPES | EXTRA_RECORD,
thd->open_options, edges, FALSE))
{
open_table_error(share, err, EMFILE, 0);
free_table_share(share);
return -1;
}
edges->reginfo.lock_type= TL_READ;
edges->tablenr= thd->current_tablenr++;
edges->status= STATUS_NO_RECORD;
edges->file->ha_start_of_new_statement();
edges->file->ft_handler= 0;
edges->pos_in_table_list= 0;
edges->clear_column_bitmaps();
bfill(table->record[0], table->s->null_bytes, 255);
bfill(table->record[1], table->s->null_bytes, 255);
// We expect fields origid, destid and optionally weight
origid= destid= weight= 0;
if (!edges->file)
{
fprint_error("Some error occurred opening table '%s'", options->table_name);
free_table_share(share);
return -1;
}
for (Field **field= edges->field; *field; ++field)
{
if (strcmp(options->origid, (*field)->field_name))
continue;
if ((*field)->cmp_type() != INT_RESULT ||
!((*field)->flags & NOT_NULL_FLAG))
{
fprint_error("Column '%s.%s' is not a not-null integer type",
options->table_name, options->origid);
closefrm(edges, 0);
free_table_share(share);
return -1;
}
origid = *field;
break;
}
for (Field **field= edges->field; *field; ++field)
{
if (strcmp(options->destid, (*field)->field_name))
continue;
if ((*field)->type() != origid->type() ||
!((*field)->flags & NOT_NULL_FLAG))
{
fprint_error("Column '%s.%s' is not a not-null integer type",
options->table_name, options->destid);
closefrm(edges, 0);
free_table_share(share);
return -1;
}
destid = *field;
break;
}
for (Field **field= edges->field; options->weight && *field; ++field)
{
if (strcmp(options->weight, (*field)->field_name))
continue;
if ((*field)->result_type() != REAL_RESULT ||
!((*field)->flags & NOT_NULL_FLAG))
{
fprint_error("Column '%s.%s' is not a not-null real type",
options->table_name, options->weight);
closefrm(edges, 0);
free_table_share(share);
return -1;
}
weight = *field;
break;
}
if (!origid || !destid || (!weight && options->weight))
{
fprint_error("Data columns missing on table '%s'", options->table_name);
closefrm(edges, 0);
free_table_share(share);
return -1;
}
if (!(graph_share = oqgraph::create(edges, origid, destid, weight)))
{
fprint_error("Unable to create graph instance.");
closefrm(edges, 0);
free_table_share(share);
return -1;
}
ref_length= oqgraph::sizeof_ref;
graph = oqgraph::create(graph_share);
return 0;
}
int ha_oqgraph::close(void)
{
oqgraph::free(graph); graph= 0;
oqgraph::free(graph_share); graph_share= 0;
if (share)
{
if (edges->file)
closefrm(edges, 0);
free_table_share(share);
}
return 0;
}
void ha_oqgraph::update_key_stats()
{
for (uint i= 0; i < table->s->keys; i++)
{
KEY *key=table->key_info+i;
if (!key->rec_per_key)
continue;
if (key->algorithm != HA_KEY_ALG_BTREE)
{
if (key->flags & HA_NOSAME)
key->rec_per_key[key->key_parts-1]= 1;
else
{
//unsigned vertices= graph->vertices_count();
//unsigned edges= graph->edges_count();
//uint no_records= vertices ? 2 * (edges + vertices) / vertices : 2;
//if (no_records < 2)
uint
no_records= 2;
key->rec_per_key[key->key_parts-1]= no_records;
}
}
}
/* At the end of update_key_stats() we can proudly claim they are OK. */
//skey_stat_version= share->key_stat_version;
}
int ha_oqgraph::write_row(byte * buf)
{
return HA_ERR_TABLE_READONLY;
}
int ha_oqgraph::update_row(const byte * old, byte * buf)
{
return HA_ERR_TABLE_READONLY;
}
int ha_oqgraph::delete_row(const byte * buf)
{
return HA_ERR_TABLE_READONLY;
}
int ha_oqgraph::index_read(byte * buf, const byte * key, uint key_len,
enum ha_rkey_function find_flag)
{
DBUG_ASSERT(inited==INDEX);
return index_read_idx(buf, active_index, key, key_len, find_flag);
}
int ha_oqgraph::index_next_same(byte *buf, const byte *key, uint key_len)
{
int res;
open_query::row row;
DBUG_ASSERT(inited==INDEX);
if (!(res= graph->fetch_row(row)))
res= fill_record(buf, row);
table->status= res ? STATUS_NOT_FOUND : 0;
return error_code(res);
}
int ha_oqgraph::index_read_idx(byte * buf, uint index, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
Field **field= table->field;
KEY *key_info= table->key_info + index;
int res;
VertexID orig_id, dest_id;
int latch;
VertexID *orig_idp=0, *dest_idp=0;
int *latchp=0;
open_query::row row;
bmove_align(buf, table->s->default_values, table->s->reclength);
key_restore(buf, (byte*) key, key_info, key_len);
my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, table->read_set);
my_ptrdiff_t ptrdiff= buf - table->record[0];
if (ptrdiff)
{
field[0]->move_field_offset(ptrdiff);
field[1]->move_field_offset(ptrdiff);
field[2]->move_field_offset(ptrdiff);
}
if (!field[0]->is_null())
{
latch= (int) field[0]->val_int();
latchp= &latch;
}
if (!field[1]->is_null())
{
orig_id= (VertexID) field[1]->val_int();
orig_idp= &orig_id;
}
if (!field[2]->is_null())
{
dest_id= (VertexID) field[2]->val_int();
dest_idp= &dest_id;
}
if (ptrdiff)
{
field[0]->move_field_offset(-ptrdiff);
field[1]->move_field_offset(-ptrdiff);
field[2]->move_field_offset(-ptrdiff);
}
dbug_tmp_restore_column_map(table->read_set, old_map);
res= graph->search(latchp, orig_idp, dest_idp);
if (!res && !(res= graph->fetch_row(row)))
res= fill_record(buf, row);
table->status = res ? STATUS_NOT_FOUND : 0;
return error_code(res);
}
int ha_oqgraph::fill_record(byte *record, const open_query::row &row)
{
Field **field= table->field;
bmove_align(record, table->s->default_values, table->s->reclength);
my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, table->write_set);
my_ptrdiff_t ptrdiff= record - table->record[0];
if (ptrdiff)
{
field[0]->move_field_offset(ptrdiff);
field[1]->move_field_offset(ptrdiff);
field[2]->move_field_offset(ptrdiff);
field[3]->move_field_offset(ptrdiff);
field[4]->move_field_offset(ptrdiff);
field[5]->move_field_offset(ptrdiff);
}
// just each field specifically, no sense iterating
if (row.latch_indicator)
{
field[0]->set_notnull();
field[0]->store((longlong) row.latch, 0);
}
if (row.orig_indicator)
{
field[1]->set_notnull();
field[1]->store((longlong) row.orig, 0);
}
if (row.dest_indicator)
{
field[2]->set_notnull();
field[2]->store((longlong) row.dest, 0);
}
if (row.weight_indicator)
{
field[3]->set_notnull();
field[3]->store((double) row.weight);
}
if (row.seq_indicator)
{
field[4]->set_notnull();
field[4]->store((longlong) row.seq, 0);
}
if (row.link_indicator)
{
field[5]->set_notnull();
field[5]->store((longlong) row.link, 0);
}
if (ptrdiff)
{
field[0]->move_field_offset(-ptrdiff);
field[1]->move_field_offset(-ptrdiff);
field[2]->move_field_offset(-ptrdiff);
field[3]->move_field_offset(-ptrdiff);
field[4]->move_field_offset(-ptrdiff);
field[5]->move_field_offset(-ptrdiff);
}
dbug_tmp_restore_column_map(table->write_set, old_map);
return 0;
}
int ha_oqgraph::rnd_init(bool scan)
{
edges->prepare_for_position();
return error_code(graph->random(scan));
}
int ha_oqgraph::rnd_next(byte *buf)
{
int res;
open_query::row row;
if (!(res= graph->fetch_row(row)))
res= fill_record(buf, row);
table->status= res ? STATUS_NOT_FOUND: 0;
return error_code(res);
}
int ha_oqgraph::rnd_pos(byte * buf, byte *pos)
{
int res;
open_query::row row;
if (!(res= graph->fetch_row(row, pos)))
res= fill_record(buf, row);
table->status=res ? STATUS_NOT_FOUND: 0;
return error_code(res);
}
void ha_oqgraph::position(const byte *record)
{
graph->row_ref((void*) ref); // Ref is aligned
}
int ha_oqgraph::cmp_ref(const byte *ref1, const byte *ref2)
{
return memcmp(ref1, ref2, oqgraph::sizeof_ref);
}
int ha_oqgraph::info(uint flag)
{
RECORDS= graph->edges_count();
/*
If info() is called for the first time after open(), we will still
have to update the key statistics. Hoping that a table lock is now
in place.
*/
// if (key_stat_version != share->key_stat_version)
// update_key_stats();
return 0;
}
int ha_oqgraph::extra(enum ha_extra_function operation)
{
return edges->file->extra(operation);
}
int ha_oqgraph::delete_all_rows()
{
return HA_ERR_TABLE_READONLY;
}
int ha_oqgraph::external_lock(THD *thd, int lock_type)
{
return edges->file->ha_external_lock(thd, lock_type);
}
THR_LOCK_DATA **ha_oqgraph::store_lock(THD *thd,
THR_LOCK_DATA **to,
enum thr_lock_type lock_type)
{
return edges->file->store_lock(thd, to, lock_type);
}
/*
We have to ignore ENOENT entries as the HEAP table is created on open and
not when doing a CREATE on the table.
*/
int ha_oqgraph::delete_table(const char *)
{
return 0;
}
int ha_oqgraph::rename_table(const char *, const char *)
{
return 0;
}
ha_rows ha_oqgraph::records_in_range(uint inx, key_range *min_key,
key_range *max_key)
{
KEY *key=table->key_info+inx;
if (!min_key || !max_key ||
min_key->length != max_key->length ||
min_key->length < key->key_length - key->key_part[2].store_length ||
min_key->flag != HA_READ_KEY_EXACT ||
max_key->flag != HA_READ_AFTER_KEY)
{
if (min_key->length == key->key_part[0].store_length)
{
// If latch is not null and equals 0, return # nodes
DBUG_ASSERT(key->key_part[0].store_length == 3);
if (key->key_part[0].null_bit && !min_key->key[0] &&
!min_key->key[1] && !min_key->key[2])
return graph->vertices_count();
}
return HA_POS_ERROR; // Can only use exact keys
}
if (stats.records <= 1)
return stats.records;
/* Assert that info() did run. We need current statistics here. */
//DBUG_ASSERT(key_stat_version == share->key_stat_version);
//ha_rows result= key->rec_per_key[key->key_parts-1];
ha_rows result= 10;
return result;
}
int ha_oqgraph::create(const char *name, TABLE *table_arg,
HA_CREATE_INFO *create_info)
{
oqgraph_table_option_struct *options=
reinterpret_cast<oqgraph_table_option_struct*>(table_arg->s->option_struct);
DBUG_PRINT( "oq-debug", ("create(name=%s)", name));
if (int res = oqgraph_check_table_structure(table_arg))
return error_code(res);
(void)(options);
return 0;
}
void ha_oqgraph::update_create_info(HA_CREATE_INFO *create_info)
{
table->file->info(HA_STATUS_AUTO);
}
struct st_mysql_storage_engine oqgraph_storage_engine=
{ MYSQL_HANDLERTON_INTERFACE_VERSION };
extern "C" const char* const oqgraph_boost_version;
extern "C" const char* const oqgraph_judy_version;
static struct st_mysql_show_var oqgraph_status[]=
{
{ "OQGraph_Boost_Version", (char*) &oqgraph_boost_version, SHOW_CHAR_PTR },
/*{ "OQGraph_Judy_Version", (char*) &oqgraph_judy_version, SHOW_CHAR_PTR },*/
{ 0, 0 }
};
maria_declare_plugin(oqgraph)
{
MYSQL_STORAGE_ENGINE_PLUGIN,
&oqgraph_storage_engine,
"OQGRAPH",
"Arjen Lentz & Antony T Curtis, Open Query",
oqgraph_description,
PLUGIN_LICENSE_GPL,
(int (*)(void*)) oqgraph_init, /* Plugin Init */
oqgraph_fini, /* Plugin Deinit */
0x0300, /* Version: 3s.0 */
oqgraph_status, /* status variables */
NULL, /* system variables */
"3.0",
MariaDB_PLUGIN_MATURITY_BETA
}
maria_declare_plugin_end;
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