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/lsyscache.h"
  41 #include "utils/guc.h"
  42 #if PG_VERSION_NUM >= 90200
  43 #include "catalog/pg_class.h"
  44 #include "nodes/primnodes.h"
  45 #include "tcop/utility.h"
  46 #include "utils/rel.h"
  47 #include "utils/relcache.h"
  48 #include "utils/timestamp.h"
  49 #endif
  50
  51 #ifdef PG_MODULE_MAGIC
  52 PG_MODULE_MAGIC;
  53 #endif
  54
  55 static bool online_analyze_enable = true;
  56 static bool online_analyze_verbose = true;
  57 static double online_analyze_scale_factor = 0.1;
  58 static int online_analyze_threshold = 50;
  59 static double online_analyze_min_interval = 10000;
  60
  61 static ExecutorEnd_hook_type oldExecutorEndHook = NULL;
  62 #if PG_VERSION_NUM >= 90200
  63 static ProcessUtility_hook_type oldProcessUtilityHook = NULL;
  64 #endif
  65
  66 typedef enum
  67 {
  68         OATT_ALL                = 0x03,
  69         OATT_PERSISTENT = 0x01,
  70         OATT_TEMPORARY  = 0x02,
  71         OATT_NONE               = 0x00
  72 } OnlineAnalyzeTableType;
  73
  74 static const struct config_enum_entry online_analyze_table_type_options[] =
  75 {
  76         {"all", OATT_ALL, false},
  77         {"persistent", OATT_PERSISTENT, false},
  78         {"temporary", OATT_TEMPORARY, false},
  79         {"none", OATT_NONE, false},
  80         {NULL, 0, false},
  81 };
  82
  83 static int online_analyze_table_type = (int)OATT_ALL;
  84
  85 typedef struct TableList {
  86         int             nTables;
  87         Oid             *tables;
  88         char    *tableStr;
  89 } TableList;
  90
  91 static TableList excludeTables = {0, NULL, NULL};
  92 static TableList includeTables = {0, NULL, NULL};
  93
  94 static int
  95 oid_cmp(const void *a, const void *b)
  96 {
  97         if (*(Oid*)a == *(Oid*)b)
  98                 return 0;
  99         return (*(Oid*)a > *(Oid*)b) ? 1 : -1;
 100 }
 101
 102 static const char *
 103 tableListAssign(const char * newval, bool doit, TableList *tbl)
 104 {
 105         char       *rawname;
 106         List       *namelist;
 107         ListCell   *l;
 108         Oid         *newOids = NULL;
 109         int         nOids = 0,
 110                                 i = 0;
 111
 112         rawname = pstrdup(newval);
 113
 114         if (!SplitIdentifierString(rawname, ',', &namelist))
 115                 goto cleanup;
 116
 117         if (doit)
 118         {
 119                 nOids = list_length(namelist);
 120                 newOids = malloc(sizeof(Oid) * (nOids+1));
 121                 if (!newOids)
 122                         elog(ERROR,"could not allocate %d bytes", (int)(sizeof(Oid) * (nOids+1)));
 123         }
 124
 125         foreach(l, namelist)
 126         {
 127                 char        *curname = (char *) lfirst(l);
 128 #if PG_VERSION_NUM >= 90200
 129                 Oid         relOid = RangeVarGetRelid(makeRangeVarFromNameList(stringToQualifiedNameList(curname)),
 130                                                                                                 NoLock, true);
 131 #else
 132                 Oid         relOid = RangeVarGetRelid(makeRangeVarFromNameList(stringToQualifiedNameList(curname)),
 133                                                                                                 true);
 134 #endif
 135
 136                 if (relOid == InvalidOid)
 137                 {
 138 #if PG_VERSION_NUM >= 90100
 139                         if (doit == false)
 140 #endif
 141                         elog(WARNING,"'%s' does not exist", curname);
 142                         continue;
 143                 }
 144                 else if ( get_rel_relkind(relOid) != RELKIND_RELATION )
 145                 {
 146 #if PG_VERSION_NUM >= 90100
 147                         if (doit == false)
 148 #endif
 149                                 elog(WARNING,"'%s' is not an table", curname);
 150                         continue;
 151                 }
 152                 else if (doit)
 153                 {
 154                         newOids[i++] = relOid;
 155                 }
 156         }
 157
 158         if (doit)
 159         {
 160                 tbl->nTables = i;
 161                 if (tbl->tables)
 162                         free(tbl->tables);
 163                 tbl->tables = newOids;
 164                 if (tbl->nTables > 1)
 165                         qsort(tbl->tables, tbl->nTables, sizeof(tbl->tables[0]), oid_cmp);
 166         }
 167
 168         pfree(rawname);
 169         list_free(namelist);
 170
 171         return newval;
 172
 173 cleanup:
 174         if (newOids)
 175                 free(newOids);
 176         pfree(rawname);
 177         list_free(namelist);
 178         return NULL;
 179 }
 180
 181 #if PG_VERSION_NUM >= 90100
 182 static bool
 183 excludeTablesCheck(char **newval, void **extra, GucSource source)
 184 {
 185         char *val;
 186
 187         val = (char*)tableListAssign(*newval, false, &excludeTables);
 188
 189         if (val)
 190         {
 191                 *newval = val;
 192                 return true;
 193         }
 194
 195         return false;
 196 }
 197
 198 static void
 199 excludeTablesAssign(const char *newval, void *extra)
 200 {
 201         tableListAssign(newval, true, &excludeTables);
 202 }
 203
 204 static bool
 205 includeTablesCheck(char **newval, void **extra, GucSource source)
 206 {
 207         char *val;
 208
 209         val = (char*)tableListAssign(*newval, false, &includeTables);
 210
 211         if (val)
 212         {
 213                 *newval = val;
 214                 return true;
 215         }
 216
 217         return false;
 218 }
 219
 220 static void
 221 includeTablesAssign(const char *newval, void *extra)
 222 {
 223         tableListAssign(newval, true, &excludeTables);
 224 }
 225
 226 #else /* PG_VERSION_NUM < 90100 */
 227
 228 static const char *
 229 excludeTablesAssign(const char * newval, bool doit, GucSource source)
 230 {
 231         return tableListAssign(newval, doit, &excludeTables);
 232 }
 233
 234 static const char *
 235 includeTablesAssign(const char * newval, bool doit, GucSource source)
 236 {
 237         return tableListAssign(newval, doit, &includeTables);
 238 }
 239
 240 #endif
 241
 242 static const char*
 243 tableListShow(TableList *tbl)
 244 {
 245         char    *val, *ptr;
 246         int     i,
 247                         len;
 248
 249         len = 1 /* \0 */ + tbl->nTables * (2 * NAMEDATALEN + 2 /* ', ' */ + 1 /* . */);
 250         ptr = val = palloc(len);
 251         *ptr ='\0';
 252         for(i=0; i<tbl->nTables; i++)
 253         {
 254                 char    *relname = get_rel_name(tbl->tables[i]);
 255                 Oid     nspOid = get_rel_namespace(tbl->tables[i]);
 256                 char    *nspname = get_namespace_name(nspOid);
 257
 258                 if ( relname == NULL || nspOid == InvalidOid || nspname == NULL )
 259                         continue;
 260
 261                 ptr += snprintf(ptr, len - (ptr - val), "%s%s.%s",
 262                                                                                                         (i==0) ? "" : ", ",
 263                                                                                                         nspname, relname);
 264         }
 265
 266         return val;
 267 }
 268
 269 static const char*
 270 excludeTablesShow(void)
 271 {
 272         return tableListShow(&excludeTables);
 273 }
 274
 275 static const char*
 276 includeTablesShow(void)
 277 {
 278         return tableListShow(&includeTables);
 279 }
 280
 281 static bool
 282 matchOid(TableList *tbl, Oid oid)
 283 {
 284         Oid     *StopLow = tbl->tables,
 285                 *StopHigh = tbl->tables + tbl->nTables,
 286                 *StopMiddle;
 287
 288         /* Loop invariant: StopLow <= val < StopHigh */
 289         while (StopLow < StopHigh)
 290         {
 291                 StopMiddle = StopLow + ((StopHigh - StopLow) >> 1);
 292
 293                 if (*StopMiddle == oid)
 294                         return true;
 295                 else  if (*StopMiddle < oid)
 296                         StopLow = StopMiddle + 1;
 297                 else
 298                         StopHigh = StopMiddle;
 299         }
 300
 301         return false;
 302 }
 303
 304 static void
 305 makeAnalyze(Oid relOid, CmdType operation, uint32 naffected)
 306 {
 307         PgStat_StatTabEntry             *tabentry;
 308         TimestampTz                     now = GetCurrentTimestamp();
 309
 310         if (relOid == InvalidOid)
 311                 return;
 312
 313         if (get_rel_relkind(relOid) != RELKIND_RELATION)
 314                 return;
 315
 316         tabentry = pgstat_fetch_stat_tabentry(relOid);
 317
 318 #if PG_VERSION_NUM >= 90000
 319 #define changes_since_analyze(t)        ((t)->changes_since_analyze)
 320 #else
 321 #define changes_since_analyze(t)        ((t)->n_live_tuples + (t)->n_dead_tuples - (t)->last_anl_tuples)
 322 #endif
 323
 324         if (
 325                 tabentry == NULL /* a new table */ ||
 326                 (
 327                         /* do not analyze too often, if both stamps are exceeded the go */
 328                         TimestampDifferenceExceeds(tabentry->analyze_timestamp, now, online_analyze_min_interval) &&
 329                         TimestampDifferenceExceeds(tabentry->autovac_analyze_timestamp, now, online_analyze_min_interval) &&
 330                         /* be in sync with relation_needs_vacanalyze */
 331                         ((double)(changes_since_analyze(tabentry) + naffected)) >=
 332                                 online_analyze_scale_factor * ((double)(tabentry->n_dead_tuples + tabentry->n_live_tuples)) +
 333                                         (double)online_analyze_threshold
 334                 )
 335         )
 336         {
 337 #if PG_VERSION_NUM < 90500
 338                 VacuumStmt                              vacstmt;
 339 #else
 340                 VacuumParams                    vacstmt;
 341 #endif
 342                 TimestampTz                             startStamp, endStamp;
 343
 344                 memset(&startStamp, 0, sizeof(startStamp)); /* keep compiler quiet */
 345
 346                 /*
 347                  * includeTables overwrites excludeTables
 348                  */
 349                 switch(online_analyze_table_type)
 350                 {
 351                         case OATT_ALL:
 352                                 if (matchOid(&excludeTables, relOid) == true && matchOid(&includeTables, relOid) == false)
 353                                         return;
 354                                 break;
 355                         case OATT_NONE:
 356                                 if (matchOid(&includeTables, relOid) == false)
 357                                         return;
 358                                 break;
 359                         case OATT_TEMPORARY:
 360                         case OATT_PERSISTENT:
 361                         default:
 362                                 {
 363                                         Relation                                rel;
 364                                         OnlineAnalyzeTableType  reltype;
 365
 366                                         rel = RelationIdGetRelation(relOid);
 367                                         reltype =
 368 #if PG_VERSION_NUM >= 90100
 369                                                 (rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP)
 370 #else
 371                                                 (rel->rd_istemp || rel->rd_islocaltemp)
 372 #endif
 373                                                         ? OATT_TEMPORARY : OATT_PERSISTENT;
 374                                         RelationClose(rel);
 375
 376                                         /*
 377                                          * skip analyze if relation's type doesn't not match online_analyze_table_type
 378                                          */
 379                                         if ((online_analyze_table_type & reltype) == 0 || matchOid(&excludeTables, relOid) == true)
 380                                         {
 381                                                 if (matchOid(&includeTables, relOid) == false)
 382                                                         return;
 383                                         }
 384                                 }
 385                                 break;
 386                 }
 387
 388                 memset(&vacstmt, 0, sizeof(vacstmt));
 389
 390                 vacstmt.freeze_min_age = -1;
 391                 vacstmt.freeze_table_age = -1; /* ??? */
 392
 393 #if PG_VERSION_NUM < 90500
 394                 vacstmt.type = T_VacuumStmt;
 395                 vacstmt.relation = NULL;
 396                 vacstmt.va_cols = NIL;
 397 #if PG_VERSION_NUM >= 90000
 398                 vacstmt.options = VACOPT_ANALYZE;
 399                 if (online_analyze_verbose)
 400                         vacstmt.options |= VACOPT_VERBOSE;
 401 #else
 402                 vacstmt.vacuum = vacstmt.full = false;
 403                 vacstmt.analyze = true;
 404                 vacstmt.verbose = online_analyze_verbose;
 405 #endif
 406 #else
 407                 vacstmt.multixact_freeze_min_age = -1;
 408                 vacstmt.multixact_freeze_table_age = -1;
 409                 vacstmt.log_min_duration = -1;
 410 #endif
 411
 412                 if (online_analyze_verbose)
 413                         startStamp = GetCurrentTimestamp();
 414
 415                 analyze_rel(relOid,
 416 #if PG_VERSION_NUM < 90500
 417                         &vacstmt
 418 #if PG_VERSION_NUM >= 90018
 419                         , true
 420 #endif
 421                         , GetAccessStrategy(BAS_VACUUM)
 422 #if (PG_VERSION_NUM >= 90000) && (PG_VERSION_NUM < 90004)
 423                         , true
 424 #endif
 425 #else
 426                         NULL /*RangeVar*/, VACOPT_ANALYZE | ((online_analyze_verbose) ? VACOPT_VERBOSE : 0),
 427                         &vacstmt, NULL, true, GetAccessStrategy(BAS_VACUUM)
 428 #endif
 429                 );
 430
 431                 if (online_analyze_verbose)
 432                 {
 433                         long    secs;
 434                         int             microsecs;
 435
 436                         endStamp = GetCurrentTimestamp();
 437                         TimestampDifference(startStamp, endStamp, &secs, &microsecs);
 438                         elog(INFO, "analyze \"%s\" took %.02f seconds",
 439                                 get_rel_name(relOid), ((double)secs) + ((double)microsecs)/1.0e6);
 440                 }
 441
 442
 443                 if (tabentry == NULL)
 444                 {
 445                         /* new table */
 446                         pgstat_clear_snapshot();
 447                 }
 448                 else
 449                 {
 450                         /* update last analyze timestamp in local memory of backend */
 451                         tabentry->analyze_timestamp = now;
 452                 }
 453         }
 454 #if PG_VERSION_NUM >= 90000
 455         else if (tabentry != NULL)
 456         {
 457                 tabentry->changes_since_analyze += naffected;
 458         }
 459 #endif
 460 }
 461
 462 extern PGDLLIMPORT void onlineAnalyzeHooker(QueryDesc *queryDesc);
 463 void
 464 onlineAnalyzeHooker(QueryDesc *queryDesc)
 465 {
 466         uint32  naffected = 0;
 467
 468         if (queryDesc->estate)
 469                 naffected = queryDesc->estate->es_processed;
 470
 471         if (online_analyze_enable && queryDesc->plannedstmt &&
 472                         (queryDesc->operation == CMD_INSERT ||
 473                          queryDesc->operation == CMD_UPDATE ||
 474                          queryDesc->operation == CMD_DELETE
 475 #if PG_VERSION_NUM < 90200
 476                          || (queryDesc->operation == CMD_SELECT && queryDesc->plannedstmt->intoClause)
 477 #endif
 478                          ))
 479         {
 480 #if PG_VERSION_NUM < 90200
 481                 if (queryDesc->operation == CMD_SELECT)
 482                 {
 483                         Oid     relOid = RangeVarGetRelid(queryDesc->plannedstmt->intoClause->rel, true);
 484
 485                         makeAnalyze(relOid, queryDesc->operation, naffected);
 486                 }
 487                 else
 488 #endif
 489                 if (queryDesc->plannedstmt->resultRelations &&
 490                                  queryDesc->plannedstmt->rtable)
 491                 {
 492                         ListCell        *l;
 493
 494                         foreach(l, queryDesc->plannedstmt->resultRelations)
 495                         {
 496                                 int                     n = lfirst_int(l);
 497                                 RangeTblEntry   *rte = list_nth(queryDesc->plannedstmt->rtable, n-1);
 498
 499                                 if (rte->rtekind == RTE_RELATION)
 500                                         makeAnalyze(rte->relid, queryDesc->operation, naffected);
 501                         }
 502                 }
 503         }
 504
 505         if (oldExecutorEndHook)
 506                 oldExecutorEndHook(queryDesc);
 507         else
 508                 standard_ExecutorEnd(queryDesc);
 509 }
 510
 511 #if PG_VERSION_NUM >= 90200
 512 static void
 513 onlineAnalyzeHookerUtility(Node *parsetree, const char *queryString,
 514 #if PG_VERSION_NUM >= 90300
 515                                                         ProcessUtilityContext context, ParamListInfo params,
 516 #else
 517                                                         ParamListInfo params, bool isTopLevel,
 518 #endif
 519                                                         DestReceiver *dest, char *completionTag) {
 520         RangeVar        *tblname = NULL;
 521
 522         if (IsA(parsetree, CreateTableAsStmt) && ((CreateTableAsStmt*)parsetree)->into)
 523                 tblname = (RangeVar*)copyObject(((CreateTableAsStmt*)parsetree)->into->rel);
 524
 525         if (oldProcessUtilityHook)
 526                 oldProcessUtilityHook(parsetree, queryString,
 527 #if PG_VERSION_NUM >= 90300
 528                                                           context, params,
 529 #else
 530                                                           params, isTopLevel,
 531 #endif
 532                                                           dest, completionTag);
 533         else
 534                 standard_ProcessUtility(parsetree, queryString,
 535 #if PG_VERSION_NUM >= 90300
 536                                                                 context, params,
 537 #else
 538                                                                 params, isTopLevel,
 539 #endif
 540                                                                 dest, completionTag);
 541
 542         if (tblname) {
 543                 Oid     tblOid = RangeVarGetRelid(tblname, NoLock, true);
 544
 545                 makeAnalyze(tblOid, CMD_INSERT, 0);
 546         }
 547 }
 548 #endif
 549
 550 void _PG_init(void);
 551 void
 552 _PG_init(void)
 553 {
 554         oldExecutorEndHook = ExecutorEnd_hook;
 555
 556         ExecutorEnd_hook = onlineAnalyzeHooker;
 557
 558 #if PG_VERSION_NUM >= 90200
 559         oldProcessUtilityHook = ProcessUtility_hook;
 560
 561         ProcessUtility_hook = onlineAnalyzeHookerUtility;
 562 #endif
 563
 564
 565         DefineCustomBoolVariable(
 566                 "online_analyze.enable",
 567                 "Enable on-line analyze",
 568                 "Enables analyze of table directly after insert/update/delete/select into",
 569                 &online_analyze_enable,
 570 #if PG_VERSION_NUM >= 80400
 571                 online_analyze_enable,
 572 #endif
 573                 PGC_USERSET,
 574 #if PG_VERSION_NUM >= 80400
 575                 GUC_NOT_IN_SAMPLE,
 576 #if PG_VERSION_NUM >= 90100
 577                 NULL,
 578 #endif
 579 #endif
 580                 NULL,
 581                 NULL
 582         );
 583
 584         DefineCustomBoolVariable(
 585                 "online_analyze.verbose",
 586                 "Verbosity of on-line analyze",
 587                 "Make ANALYZE VERBOSE after table's changes",
 588                 &online_analyze_verbose,
 589 #if PG_VERSION_NUM >= 80400
 590                 online_analyze_verbose,
 591 #endif
 592                 PGC_USERSET,
 593 #if PG_VERSION_NUM >= 80400
 594                 GUC_NOT_IN_SAMPLE,
 595 #if PG_VERSION_NUM >= 90100
 596                 NULL,
 597 #endif
 598 #endif
 599                 NULL,
 600                 NULL
 601         );
 602
 603     DefineCustomRealVariable(
 604                 "online_analyze.scale_factor",
 605                 "fraction of table size to start on-line analyze",
 606                 "fraction of table size to start on-line analyze",
 607                 &online_analyze_scale_factor,
 608 #if PG_VERSION_NUM >= 80400
 609                 online_analyze_scale_factor,
 610 #endif
 611                 0.0,
 612                 1.0,
 613                 PGC_USERSET,
 614 #if PG_VERSION_NUM >= 80400
 615                 GUC_NOT_IN_SAMPLE,
 616 #if PG_VERSION_NUM >= 90100
 617                 NULL,
 618 #endif
 619 #endif
 620                 NULL,
 621                 NULL
 622         );
 623
 624     DefineCustomIntVariable(
 625                 "online_analyze.threshold",
 626                 "min number of row updates before on-line analyze",
 627                 "min number of row updates before on-line analyze",
 628                 &online_analyze_threshold,
 629 #if PG_VERSION_NUM >= 80400
 630                 online_analyze_threshold,
 631 #endif
 632                 0,
 633                 0x7fffffff,
 634                 PGC_USERSET,
 635 #if PG_VERSION_NUM >= 80400
 636                 GUC_NOT_IN_SAMPLE,
 637 #if PG_VERSION_NUM >= 90100
 638                 NULL,
 639 #endif
 640 #endif
 641                 NULL,
 642                 NULL
 643         );
 644
 645     DefineCustomRealVariable(
 646                 "online_analyze.min_interval",
 647                 "minimum time interval between analyze call (in milliseconds)",
 648                 "minimum time interval between analyze call (in milliseconds)",
 649                 &online_analyze_min_interval,
 650 #if PG_VERSION_NUM >= 80400
 651                 online_analyze_min_interval,
 652 #endif
 653                 0.0,
 654                 1e30,
 655                 PGC_USERSET,
 656 #if PG_VERSION_NUM >= 80400
 657                 GUC_NOT_IN_SAMPLE,
 658 #if PG_VERSION_NUM >= 90100
 659                 NULL,
 660 #endif
 661 #endif
 662                 NULL,
 663                 NULL
 664         );
 665
 666         DefineCustomEnumVariable(
 667                 "online_analyze.table_type",
 668                 "Type(s) of table for online analyze: all(default), persistent, temporary, none",
 669                 NULL,
 670                 &online_analyze_table_type,
 671 #if PG_VERSION_NUM >= 80400
 672                 online_analyze_table_type,
 673 #endif
 674                 online_analyze_table_type_options,
 675                 PGC_USERSET,
 676 #if PG_VERSION_NUM >= 80400
 677         GUC_NOT_IN_SAMPLE,
 678 #if PG_VERSION_NUM >= 90100
 679                 NULL,
 680 #endif
 681 #endif
 682                 NULL,
 683                 NULL
 684         );
 685
 686     DefineCustomStringVariable(
 687                 "online_analyze.exclude_tables",
 688                 "List of tables which will not online analyze",
 689                 NULL,
 690                 &excludeTables.tableStr,
 691 #if PG_VERSION_NUM >= 80400
 692                 "",
 693 #endif
 694                 PGC_USERSET,
 695                 0,
 696 #if PG_VERSION_NUM >= 90100
 697                 excludeTablesCheck,
 698                 excludeTablesAssign,
 699 #else
 700                 excludeTablesAssign,
 701 #endif
 702                 excludeTablesShow
 703         );
 704
 705     DefineCustomStringVariable(
 706                 "online_analyze.include_tables",
 707                 "List of tables which will online analyze",
 708                 NULL,
 709                 &includeTables.tableStr,
 710 #if PG_VERSION_NUM >= 80400
 711                 "",
 712 #endif
 713                 PGC_USERSET,
 714                 0,
 715 #if PG_VERSION_NUM >= 90100
 716                 includeTablesCheck,
 717                 includeTablesAssign,
 718 #else
 719                 includeTablesAssign,
 720 #endif
 721                 includeTablesShow
 722         );
 723 }
 724
 725 void _PG_fini(void);
 726 void
 727 _PG_fini(void)
 728 {
 729         ExecutorEnd_hook = oldExecutorEndHook;
 730 #if PG_VERSION_NUM >= 90200
 731         ProcessUtility_hook = oldProcessUtilityHook;
 732 #endif
 733
 734         if (excludeTables.tables)
 735                 free(excludeTables.tables);
 736         if (includeTables.tables)
 737                 free(includeTables.tables);
 738
 739         excludeTables.tables = includeTables.tables = NULL;
 740         excludeTables.nTables = includeTables.nTables = 0;
 741 }