online_analyze.c

   1 /*
   2  * Copyright (c) 2011 Teodor Sigaev <teodor@sigaev.ru>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *              notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *              notice, this list of conditions and the following disclaimer in the
  12  *              documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *              may be used to endorse or promote products derived from this software
  15  *              without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "postgres.h"
  31
  32 #include "pgstat.h"
  33 #include "catalog/namespace.h"
  34 #include "commands/vacuum.h"
  35 #include "executor/executor.h"
  36 #include "nodes/nodes.h"
  37 #include "nodes/parsenodes.h"
  38 #include "storage/bufmgr.h"
  39 #include "utils/builtins.h"
  40 #include "utils/hsearch.h"
  41 #include "utils/memutils.h"
  42 #include "utils/lsyscache.h"
  43 #include "utils/guc.h"
  44 #if PG_VERSION_NUM >= 90200
  45 #include "catalog/pg_class.h"
  46 #include "nodes/primnodes.h"
  47 #include "tcop/utility.h"
  48 #include "utils/rel.h"
  49 #include "utils/relcache.h"
  50 #include "utils/timestamp.h"
  51 #if PG_VERSION_NUM >= 90500
  52 #include "nodes/makefuncs.h"
  53 #endif
  54 #endif
  55
  56 #ifdef PG_MODULE_MAGIC
  57 PG_MODULE_MAGIC;
  58 #endif
  59
  60 static bool online_analyze_enable = true;
  61 static bool online_analyze_verbose = true;
  62 static double online_analyze_scale_factor = 0.1;
  63 static int online_analyze_threshold = 50;
  64 static double online_analyze_min_interval = 10000;
  65
  66 static ExecutorEnd_hook_type oldExecutorEndHook = NULL;
  67 #if PG_VERSION_NUM >= 90200
  68 static ProcessUtility_hook_type oldProcessUtilityHook = NULL;
  69 #endif
  70
  71 typedef enum
  72 {
  73         OATT_ALL                = 0x03,
  74         OATT_PERSISTENT = 0x01,
  75         OATT_TEMPORARY  = 0x02,
  76         OATT_NONE               = 0x00
  77 } OnlineAnalyzeTableType;
  78
  79 static const struct config_enum_entry online_analyze_table_type_options[] =
  80 {
  81         {"all", OATT_ALL, false},
  82         {"persistent", OATT_PERSISTENT, false},
  83         {"temporary", OATT_TEMPORARY, false},
  84         {"none", OATT_NONE, false},
  85         {NULL, 0, false},
  86 };
  87
  88 static int online_analyze_table_type = (int)OATT_ALL;
  89
  90 typedef struct TableList {
  91         int             nTables;
  92         Oid             *tables;
  93         char    *tableStr;
  94 } TableList;
  95
  96 static TableList excludeTables = {0, NULL, NULL};
  97 static TableList includeTables = {0, NULL, NULL};
  98
  99 typedef struct OnlineAnalyzeTableStat {
 100         Oid                             tableid;
 101         bool                    rereadStat;
 102         PgStat_Counter  n_tuples;
 103         PgStat_Counter  changes_since_analyze;
 104         TimestampTz             autovac_analyze_timestamp;
 105         TimestampTz             analyze_timestamp;
 106 } OnlineAnalyzeTableStat;
 107
 108 static  HTAB    *relstats = NULL;
 109
 110 static int
 111 oid_cmp(const void *a, const void *b)
 112 {
 113         if (*(Oid*)a == *(Oid*)b)
 114                 return 0;
 115         return (*(Oid*)a > *(Oid*)b) ? 1 : -1;
 116 }
 117
 118 static const char *
 119 tableListAssign(const char * newval, bool doit, TableList *tbl)
 120 {
 121         char            *rawname;
 122         List            *namelist;
 123         ListCell        *l;
 124         Oid                     *newOids = NULL;
 125         int                     nOids = 0,
 126                                 i = 0;
 127
 128         rawname = pstrdup(newval);
 129
 130         if (!SplitIdentifierString(rawname, ',', &namelist))
 131                 goto cleanup;
 132
 133         if (doit)
 134         {
 135                 nOids = list_length(namelist);
 136                 newOids = malloc(sizeof(Oid) * (nOids+1));
 137                 if (!newOids)
 138                         elog(ERROR,"could not allocate %d bytes",
 139                                  (int)(sizeof(Oid) * (nOids+1)));
 140         }
 141
 142         foreach(l, namelist)
 143         {
 144                 char    *curname = (char *) lfirst(l);
 145 #if PG_VERSION_NUM >= 90200
 146                 Oid             relOid = RangeVarGetRelid(makeRangeVarFromNameList(
 147                                                         stringToQualifiedNameList(curname)), NoLock, true);
 148 #else
 149                 Oid             relOid = RangeVarGetRelid(makeRangeVarFromNameList(
 150                                                         stringToQualifiedNameList(curname)), true);
 151 #endif
 152
 153                 if (relOid == InvalidOid)
 154                 {
 155 #if PG_VERSION_NUM >= 90100
 156                         if (doit == false)
 157 #endif
 158                         elog(WARNING,"'%s' does not exist", curname);
 159                         continue;
 160                 }
 161                 else if ( get_rel_relkind(relOid) != RELKIND_RELATION )
 162                 {
 163 #if PG_VERSION_NUM >= 90100
 164                         if (doit == false)
 165 #endif
 166                                 elog(WARNING,"'%s' is not an table", curname);
 167                         continue;
 168                 }
 169                 else if (doit)
 170                 {
 171                         newOids[i++] = relOid;
 172                 }
 173         }
 174
 175         if (doit)
 176         {
 177                 tbl->nTables = i;
 178                 if (tbl->tables)
 179                         free(tbl->tables);
 180                 tbl->tables = newOids;
 181                 if (tbl->nTables > 1)
 182                         qsort(tbl->tables, tbl->nTables, sizeof(tbl->tables[0]), oid_cmp);
 183         }
 184
 185         pfree(rawname);
 186         list_free(namelist);
 187
 188         return newval;
 189
 190 cleanup:
 191         if (newOids)
 192                 free(newOids);
 193         pfree(rawname);
 194         list_free(namelist);
 195         return NULL;
 196 }
 197
 198 #if PG_VERSION_NUM >= 90100
 199 static bool
 200 excludeTablesCheck(char **newval, void **extra, GucSource source)
 201 {
 202         char *val;
 203
 204         val = (char*)tableListAssign(*newval, false, &excludeTables);
 205
 206         if (val)
 207         {
 208                 *newval = val;
 209                 return true;
 210         }
 211
 212         return false;
 213 }
 214
 215 static void
 216 excludeTablesAssign(const char *newval, void *extra)
 217 {
 218         tableListAssign(newval, true, &excludeTables);
 219 }
 220
 221 static bool
 222 includeTablesCheck(char **newval, void **extra, GucSource source)
 223 {
 224         char *val;
 225
 226         val = (char*)tableListAssign(*newval, false, &includeTables);
 227
 228         if (val)
 229         {
 230                 *newval = val;
 231                 return true;
 232         }
 233
 234         return false;
 235 }
 236
 237 static void
 238 includeTablesAssign(const char *newval, void *extra)
 239 {
 240         tableListAssign(newval, true, &excludeTables);
 241 }
 242
 243 #else /* PG_VERSION_NUM < 90100 */
 244
 245 static const char *
 246 excludeTablesAssign(const char * newval, bool doit, GucSource source)
 247 {
 248         return tableListAssign(newval, doit, &excludeTables);
 249 }
 250
 251 static const char *
 252 includeTablesAssign(const char * newval, bool doit, GucSource source)
 253 {
 254         return tableListAssign(newval, doit, &includeTables);
 255 }
 256
 257 #endif
 258
 259 static const char*
 260 tableListShow(TableList *tbl)
 261 {
 262         char    *val, *ptr;
 263         int             i,
 264                         len;
 265
 266         len = 1 /* \0 */ + tbl->nTables * (2 * NAMEDATALEN + 2 /* ', ' */ + 1 /* . */);
 267         ptr = val = palloc(len);
 268         *ptr ='\0';
 269         for(i=0; i<tbl->nTables; i++)
 270         {
 271                 char    *relname = get_rel_name(tbl->tables[i]);
 272                 Oid             nspOid = get_rel_namespace(tbl->tables[i]);
 273                 char    *nspname = get_namespace_name(nspOid);
 274
 275                 if ( relname == NULL || nspOid == InvalidOid || nspname == NULL )
 276                         continue;
 277
 278                 ptr += snprintf(ptr, len - (ptr - val), "%s%s.%s",
 279                                                                                                         (i==0) ? "" : ", ",
 280                                                                                                         nspname, relname);
 281         }
 282
 283         return val;
 284 }
 285
 286 static const char*
 287 excludeTablesShow(void)
 288 {
 289         return tableListShow(&excludeTables);
 290 }
 291
 292 static const char*
 293 includeTablesShow(void)
 294 {
 295         return tableListShow(&includeTables);
 296 }
 297
 298 static bool
 299 matchOid(TableList *tbl, Oid oid)
 300 {
 301         Oid     *StopLow = tbl->tables,
 302                 *StopHigh = tbl->tables + tbl->nTables,
 303                 *StopMiddle;
 304
 305         /* Loop invariant: StopLow <= val < StopHigh */
 306         while (StopLow < StopHigh)
 307         {
 308                 StopMiddle = StopLow + ((StopHigh - StopLow) >> 1);
 309
 310                 if (*StopMiddle == oid)
 311                         return true;
 312                 else  if (*StopMiddle < oid)
 313                         StopLow = StopMiddle + 1;
 314                 else
 315                         StopHigh = StopMiddle;
 316         }
 317
 318         return false;
 319 }
 320
 321 #if PG_VERSION_NUM >= 90500
 322 static RangeVar*
 323 makeRangeVarFromOid(Oid relOid)
 324 {
 325         return makeRangeVar(
 326                                 get_namespace_name(get_rel_namespace(relOid)),
 327                                 get_rel_name(relOid),
 328                                 -1
 329                         );
 330
 331 }
 332 #endif
 333
 334 static void
 335 makeAnalyze(Oid relOid, CmdType operation, int32 naffected)
 336 {
 337         TimestampTz                             now = GetCurrentTimestamp();
 338         Relation                                rel;
 339         OnlineAnalyzeTableType  reltype;
 340         bool                                    found,
 341                                                         newTable = false;
 342         OnlineAnalyzeTableStat  *rstat;
 343         PgStat_StatTabEntry             *tabentry = NULL;
 344
 345         if (relOid == InvalidOid)
 346                 return;
 347
 348         if (naffected == 0)
 349                 /* return if there is not changes */
 350                 return;
 351         else if (naffected < 0)
 352                 /* number if affected rows is unknown */
 353                 naffected = 0;
 354
 355         rel = RelationIdGetRelation(relOid);
 356         if (rel->rd_rel->relkind != RELKIND_RELATION)
 357         {
 358                 RelationClose(rel);
 359                 return;
 360         }
 361
 362         reltype =
 363 #if PG_VERSION_NUM >= 90100
 364                 (rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP)
 365 #else
 366                 (rel->rd_istemp || rel->rd_islocaltemp)
 367 #endif
 368                         ? OATT_TEMPORARY : OATT_PERSISTENT;
 369
 370         RelationClose(rel);
 371
 372         /*
 373          * includeTables overwrites excludeTables
 374          */
 375         switch(online_analyze_table_type)
 376         {
 377                 case OATT_ALL:
 378                         if (get_rel_relkind(relOid) != RELKIND_RELATION ||
 379                                 (matchOid(&excludeTables, relOid) == true &&
 380                                 matchOid(&includeTables, relOid) == false))
 381                                 return;
 382                         break;
 383                 case OATT_NONE:
 384                         if (get_rel_relkind(relOid) != RELKIND_RELATION ||
 385                                 matchOid(&includeTables, relOid) == false)
 386                                 return;
 387                         break;
 388                 case OATT_TEMPORARY:
 389                 case OATT_PERSISTENT:
 390                 default:
 391                         /*
 392                          * skip analyze if relation's type doesn't not match
 393                          * online_analyze_table_type
 394                          */
 395                         if ((online_analyze_table_type & reltype) == 0 ||
 396                                 matchOid(&excludeTables, relOid) == true)
 397                         {
 398                                 if (matchOid(&includeTables, relOid) == false)
 399                                         return;
 400                         }
 401                         break;
 402         }
 403
 404         rstat = hash_search(relstats, &relOid, HASH_ENTER, &found);
 405
 406         if (found == false || rstat->rereadStat == true || naffected == 0)
 407         {
 408
 409                 if (!found)
 410                 {
 411                         MemSet(rstat, 0, sizeof(*rstat));
 412                         rstat->tableid = relOid;
 413                 }
 414                 Assert(rstat->tableid == relOid);
 415
 416                 tabentry = pgstat_fetch_stat_tabentry(relOid);
 417
 418                 if (tabentry)
 419                 {
 420                         rstat->n_tuples = tabentry->n_dead_tuples + tabentry->n_live_tuples;
 421                         rstat->changes_since_analyze =
 422 #if PG_VERSION_NUM >= 90000
 423                                 tabentry->changes_since_analyze;
 424 #else
 425                                 tabentry->n_live_tuples + tabentry->n_dead_tuples -
 426                                         tabentry->last_anl_tuples;
 427 #endif
 428                         rstat->autovac_analyze_timestamp =
 429                                 tabentry->autovac_analyze_timestamp;
 430                         rstat->analyze_timestamp = tabentry->analyze_timestamp;
 431                         rstat->rereadStat = false;
 432                 }
 433                 else
 434                 {
 435                         newTable = true;
 436                         rstat->rereadStat = true;
 437                 }
 438         }
 439
 440         if (newTable || (
 441                 /* do not analyze too often, if both stamps are exceeded the go */
 442                 TimestampDifferenceExceeds(rstat->analyze_timestamp, now, online_analyze_min_interval) &&
 443                 TimestampDifferenceExceeds(rstat->autovac_analyze_timestamp, now, online_analyze_min_interval) &&
 444                 /* be in sync with relation_needs_vacanalyze */
 445                 ((double)(rstat->changes_since_analyze + naffected)) >=
 446                          online_analyze_scale_factor * ((double)rstat->n_tuples) +
 447                          (double)online_analyze_threshold))
 448         {
 449 #if PG_VERSION_NUM < 90500
 450                 VacuumStmt                              vacstmt;
 451 #else
 452                 VacuumParams                    vacstmt;
 453 #endif
 454                 TimestampTz                             startStamp, endStamp;
 455
 456
 457                 memset(&startStamp, 0, sizeof(startStamp)); /* keep compiler quiet */
 458
 459                 memset(&vacstmt, 0, sizeof(vacstmt));
 460
 461                 vacstmt.freeze_min_age = -1;
 462                 vacstmt.freeze_table_age = -1; /* ??? */
 463
 464 #if PG_VERSION_NUM < 90500
 465                 vacstmt.type = T_VacuumStmt;
 466                 vacstmt.relation = NULL;
 467                 vacstmt.va_cols = NIL;
 468 #if PG_VERSION_NUM >= 90000
 469                 vacstmt.options = VACOPT_ANALYZE;
 470                 if (online_analyze_verbose)
 471                         vacstmt.options |= VACOPT_VERBOSE;
 472 #else
 473                 vacstmt.vacuum = vacstmt.full = false;
 474                 vacstmt.analyze = true;
 475                 vacstmt.verbose = online_analyze_verbose;
 476 #endif
 477 #else
 478                 vacstmt.multixact_freeze_min_age = -1;
 479                 vacstmt.multixact_freeze_table_age = -1;
 480                 vacstmt.log_min_duration = -1;
 481 #endif
 482
 483                 if (online_analyze_verbose)
 484                         startStamp = GetCurrentTimestamp();
 485
 486                 analyze_rel(relOid,
 487 #if PG_VERSION_NUM < 90500
 488                         &vacstmt
 489 #if PG_VERSION_NUM >= 90018
 490                         , true
 491 #endif
 492                         , GetAccessStrategy(BAS_VACUUM)
 493 #if (PG_VERSION_NUM >= 90000) && (PG_VERSION_NUM < 90004)
 494                         , true
 495 #endif
 496 #else
 497                         makeRangeVarFromOid(relOid),
 498                         VACOPT_ANALYZE | ((online_analyze_verbose) ? VACOPT_VERBOSE : 0),
 499                         &vacstmt, NULL, true, GetAccessStrategy(BAS_VACUUM)
 500 #endif
 501                 );
 502
 503                 if (online_analyze_verbose)
 504                 {
 505                         long    secs;
 506                         int             microsecs;
 507
 508                         endStamp = GetCurrentTimestamp();
 509                         TimestampDifference(startStamp, endStamp, &secs, &microsecs);
 510                         elog(INFO, "analyze \"%s\" took %.02f seconds",
 511                                 get_rel_name(relOid),
 512                                 ((double)secs) + ((double)microsecs)/1.0e6);
 513                 }
 514
 515                 rstat->autovac_analyze_timestamp = now;
 516                 rstat->changes_since_analyze = 0;
 517                 rstat->rereadStat = true;
 518
 519                 /* update last analyze timestamp in local memory of backend */
 520                 if (tabentry)
 521                         tabentry->analyze_timestamp = now;
 522
 523 #if 0
 524                 /* force reload stat for new table */
 525                 if (newTable)
 526                         pgstat_clear_snapshot();
 527 #endif
 528         }
 529         else
 530         {
 531 #if PG_VERSION_NUM >= 90000
 532                 if (tabentry != NULL)
 533                         tabentry->changes_since_analyze += naffected;
 534 #endif
 535                 rstat->changes_since_analyze += naffected;
 536         }
 537 }
 538
 539 extern PGDLLIMPORT void onlineAnalyzeHooker(QueryDesc *queryDesc);
 540 void
 541 onlineAnalyzeHooker(QueryDesc *queryDesc)
 542 {
 543         uint32  naffected = -1;
 544
 545         if (queryDesc->estate)
 546                 naffected = queryDesc->estate->es_processed;
 547
 548         if (online_analyze_enable && queryDesc->plannedstmt &&
 549                         (queryDesc->operation == CMD_INSERT ||
 550                          queryDesc->operation == CMD_UPDATE ||
 551                          queryDesc->operation == CMD_DELETE
 552 #if PG_VERSION_NUM < 90200
 553                          || (queryDesc->operation == CMD_SELECT &&
 554                                  queryDesc->plannedstmt->intoClause)
 555 #endif
 556                          ))
 557         {
 558 #if PG_VERSION_NUM < 90200
 559                 if (queryDesc->operation == CMD_SELECT)
 560                 {
 561                         Oid     relOid = RangeVarGetRelid(queryDesc->plannedstmt->intoClause->rel, true);
 562
 563                         makeAnalyze(relOid, queryDesc->operation, naffected);
 564                 }
 565                 else
 566 #endif
 567                 if (queryDesc->plannedstmt->resultRelations &&
 568                                  queryDesc->plannedstmt->rtable)
 569                 {
 570                         ListCell        *l;
 571
 572                         foreach(l, queryDesc->plannedstmt->resultRelations)
 573                         {
 574                                 int                             n = lfirst_int(l);
 575                                 RangeTblEntry   *rte = list_nth(queryDesc->plannedstmt->rtable, n-1);
 576
 577                                 if (rte->rtekind == RTE_RELATION)
 578                                         makeAnalyze(rte->relid, queryDesc->operation, naffected);
 579                         }
 580                 }
 581         }
 582
 583         if (oldExecutorEndHook)
 584                 oldExecutorEndHook(queryDesc);
 585         else
 586                 standard_ExecutorEnd(queryDesc);
 587 }
 588
 589 #if PG_VERSION_NUM >= 90200
 590 static void
 591 onlineAnalyzeHookerUtility(Node *parsetree, const char *queryString,
 592 #if PG_VERSION_NUM >= 90300
 593                                                         ProcessUtilityContext context, ParamListInfo params,
 594 #else
 595                                                         ParamListInfo params, bool isTopLevel,
 596 #endif
 597                                                         DestReceiver *dest, char *completionTag) {
 598         RangeVar        *tblname = NULL;
 599
 600         if (IsA(parsetree, CreateTableAsStmt) && ((CreateTableAsStmt*)parsetree)->into)
 601                 tblname = (RangeVar*)copyObject(((CreateTableAsStmt*)parsetree)->into->rel);
 602
 603         if (oldProcessUtilityHook)
 604                 oldProcessUtilityHook(parsetree, queryString,
 605 #if PG_VERSION_NUM >= 90300
 606                                                           context, params,
 607 #else
 608                                                           params, isTopLevel,
 609 #endif
 610                                                           dest, completionTag);
 611         else
 612                 standard_ProcessUtility(parsetree, queryString,
 613 #if PG_VERSION_NUM >= 90300
 614                                                                 context, params,
 615 #else
 616                                                                 params, isTopLevel,
 617 #endif
 618                                                                 dest, completionTag);
 619
 620         if (tblname) {
 621                 Oid     tblOid = RangeVarGetRelid(tblname, NoLock, true);
 622
 623                 makeAnalyze(tblOid, CMD_INSERT, -1);
 624         }
 625 }
 626 #endif
 627
 628 static void
 629 relstatsInit()
 630 {
 631         HASHCTL hash_ctl;
 632         int             flags = 0;
 633
 634         MemSet(&hash_ctl, 0, sizeof(hash_ctl));
 635
 636         hash_ctl.hash = oid_hash;
 637         flags |= HASH_FUNCTION;
 638
 639         hash_ctl.hcxt = AllocSetContextCreate(CacheMemoryContext,
 640                                                                                   "online_analyze storage context",
 641                                                                                   ALLOCSET_DEFAULT_SIZES);
 642         flags |= HASH_CONTEXT;
 643
 644         hash_ctl.keysize = sizeof(Oid);
 645
 646         hash_ctl.entrysize = sizeof(OnlineAnalyzeTableStat);
 647         flags |= HASH_ELEM;
 648
 649         relstats = hash_create("online_analyze storage", 1024, &hash_ctl, flags);
 650 }
 651
 652 void _PG_init(void);
 653 void
 654 _PG_init(void)
 655 {
 656         relstatsInit();
 657
 658         oldExecutorEndHook = ExecutorEnd_hook;
 659
 660         ExecutorEnd_hook = onlineAnalyzeHooker;
 661
 662 #if PG_VERSION_NUM >= 90200
 663         oldProcessUtilityHook = ProcessUtility_hook;
 664
 665         ProcessUtility_hook = onlineAnalyzeHookerUtility;
 666 #endif
 667
 668
 669         DefineCustomBoolVariable(
 670                 "online_analyze.enable",
 671                 "Enable on-line analyze",
 672                 "Enables analyze of table directly after insert/update/delete/select into",
 673                 &online_analyze_enable,
 674 #if PG_VERSION_NUM >= 80400
 675                 online_analyze_enable,
 676 #endif
 677                 PGC_USERSET,
 678 #if PG_VERSION_NUM >= 80400
 679                 GUC_NOT_IN_SAMPLE,
 680 #if PG_VERSION_NUM >= 90100
 681                 NULL,
 682 #endif
 683 #endif
 684                 NULL,
 685                 NULL
 686         );
 687
 688         DefineCustomBoolVariable(
 689                 "online_analyze.verbose",
 690                 "Verbosity of on-line analyze",
 691                 "Make ANALYZE VERBOSE after table's changes",
 692                 &online_analyze_verbose,
 693 #if PG_VERSION_NUM >= 80400
 694                 online_analyze_verbose,
 695 #endif
 696                 PGC_USERSET,
 697 #if PG_VERSION_NUM >= 80400
 698                 GUC_NOT_IN_SAMPLE,
 699 #if PG_VERSION_NUM >= 90100
 700                 NULL,
 701 #endif
 702 #endif
 703                 NULL,
 704                 NULL
 705         );
 706
 707         DefineCustomRealVariable(
 708                 "online_analyze.scale_factor",
 709                 "fraction of table size to start on-line analyze",
 710                 "fraction of table size to start on-line analyze",
 711                 &online_analyze_scale_factor,
 712 #if PG_VERSION_NUM >= 80400
 713                 online_analyze_scale_factor,
 714 #endif
 715                 0.0,
 716                 1.0,
 717                 PGC_USERSET,
 718 #if PG_VERSION_NUM >= 80400
 719                 GUC_NOT_IN_SAMPLE,
 720 #if PG_VERSION_NUM >= 90100
 721                 NULL,
 722 #endif
 723 #endif
 724                 NULL,
 725                 NULL
 726         );
 727
 728         DefineCustomIntVariable(
 729                 "online_analyze.threshold",
 730                 "min number of row updates before on-line analyze",
 731                 "min number of row updates before on-line analyze",
 732                 &online_analyze_threshold,
 733 #if PG_VERSION_NUM >= 80400
 734                 online_analyze_threshold,
 735 #endif
 736                 0,
 737                 0x7fffffff,
 738                 PGC_USERSET,
 739 #if PG_VERSION_NUM >= 80400
 740                 GUC_NOT_IN_SAMPLE,
 741 #if PG_VERSION_NUM >= 90100
 742                 NULL,
 743 #endif
 744 #endif
 745                 NULL,
 746                 NULL
 747         );
 748
 749         DefineCustomRealVariable(
 750                 "online_analyze.min_interval",
 751                 "minimum time interval between analyze call (in milliseconds)",
 752                 "minimum time interval between analyze call (in milliseconds)",
 753                 &online_analyze_min_interval,
 754 #if PG_VERSION_NUM >= 80400
 755                 online_analyze_min_interval,
 756 #endif
 757                 0.0,
 758                 1e30,
 759                 PGC_USERSET,
 760 #if PG_VERSION_NUM >= 80400
 761                 GUC_NOT_IN_SAMPLE,
 762 #if PG_VERSION_NUM >= 90100
 763                 NULL,
 764 #endif
 765 #endif
 766                 NULL,
 767                 NULL
 768         );
 769
 770         DefineCustomEnumVariable(
 771                 "online_analyze.table_type",
 772                 "Type(s) of table for online analyze: all(default), persistent, temporary, none",
 773                 NULL,
 774                 &online_analyze_table_type,
 775 #if PG_VERSION_NUM >= 80400
 776                 online_analyze_table_type,
 777 #endif
 778                 online_analyze_table_type_options,
 779                 PGC_USERSET,
 780 #if PG_VERSION_NUM >= 80400
 781                 GUC_NOT_IN_SAMPLE,
 782 #if PG_VERSION_NUM >= 90100
 783                 NULL,
 784 #endif
 785 #endif
 786                 NULL,
 787                 NULL
 788         );
 789
 790         DefineCustomStringVariable(
 791                 "online_analyze.exclude_tables",
 792                 "List of tables which will not online analyze",
 793                 NULL,
 794                 &excludeTables.tableStr,
 795 #if PG_VERSION_NUM >= 80400
 796                 "",
 797 #endif
 798                 PGC_USERSET,
 799                 0,
 800 #if PG_VERSION_NUM >= 90100
 801                 excludeTablesCheck,
 802                 excludeTablesAssign,
 803 #else
 804                 excludeTablesAssign,
 805 #endif
 806                 excludeTablesShow
 807         );
 808
 809         DefineCustomStringVariable(
 810                 "online_analyze.include_tables",
 811                 "List of tables which will online analyze",
 812                 NULL,
 813                 &includeTables.tableStr,
 814 #if PG_VERSION_NUM >= 80400
 815                 "",
 816 #endif
 817                 PGC_USERSET,
 818                 0,
 819 #if PG_VERSION_NUM >= 90100
 820                 includeTablesCheck,
 821                 includeTablesAssign,
 822 #else
 823                 includeTablesAssign,
 824 #endif
 825                 includeTablesShow
 826         );
 827 }
 828
 829 void _PG_fini(void);
 830 void
 831 _PG_fini(void)
 832 {
 833         ExecutorEnd_hook = oldExecutorEndHook;
 834 #if PG_VERSION_NUM >= 90200
 835         ProcessUtility_hook = oldProcessUtilityHook;
 836 #endif
 837
 838         if (excludeTables.tables)
 839                 free(excludeTables.tables);
 840         if (includeTables.tables)
 841                 free(includeTables.tables);
 842
 843         excludeTables.tables = includeTables.tables = NULL;
 844         excludeTables.nTables = includeTables.nTables = 0;
 845 }