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 "access/transam.h"
  34 #include "access/xact.h"
  35 #include "catalog/namespace.h"
  36 #include "commands/vacuum.h"
  37 #include "executor/executor.h"
  38 #include "nodes/nodes.h"
  39 #include "nodes/parsenodes.h"
  40 #include "storage/bufmgr.h"
  41 #include "utils/builtins.h"
  42 #include "utils/hsearch.h"
  43 #include "utils/memutils.h"
  44 #include "utils/lsyscache.h"
  45 #include "utils/guc.h"
  46 #if PG_VERSION_NUM >= 90200
  47 #include "catalog/pg_class.h"
  48 #include "nodes/primnodes.h"
  49 #include "tcop/utility.h"
  50 #include "utils/rel.h"
  51 #include "utils/relcache.h"
  52 #include "utils/timestamp.h"
  53 #if PG_VERSION_NUM >= 90500
  54 #include "nodes/makefuncs.h"
  55 #if PG_VERSION_NUM >= 100000
  56 #include "utils/varlena.h"
  57 #include "utils/regproc.h"
  58 #endif
  59 #endif
  60 #endif
  61
  62 #ifdef PG_MODULE_MAGIC
  63 PG_MODULE_MAGIC;
  64 #endif
  65
  66 static bool online_analyze_enable = true;
  67 static bool online_analyze_local_tracking = false;
  68 static bool online_analyze_verbose = true;
  69 static double online_analyze_scale_factor = 0.1;
  70 static int online_analyze_threshold = 50;
  71 static int online_analyze_capacity_threshold = 100000;
  72 static double online_analyze_min_interval = 10000;
  73 static int online_analyze_lower_limit = 0;
  74
  75 static ExecutorEnd_hook_type oldExecutorEndHook = NULL;
  76 #if PG_VERSION_NUM >= 90200
  77 static ProcessUtility_hook_type oldProcessUtilityHook = NULL;
  78 #endif
  79
  80 typedef enum CmdKind
  81 {
  82         CK_SELECT = CMD_SELECT,
  83         CK_UPDATE = CMD_UPDATE,
  84         CK_INSERT = CMD_INSERT,
  85         CK_DELETE = CMD_DELETE,
  86         CK_TRUNCATE,
  87         CK_FASTTRUNCATE,
  88         CK_CREATE,
  89         CK_ANALYZE,
  90         CK_VACUUM
  91 } CmdKind;
  92
  93
  94 typedef enum
  95 {
  96         OATT_ALL                = 0x03,
  97         OATT_PERSISTENT = 0x01,
  98         OATT_TEMPORARY  = 0x02,
  99         OATT_NONE               = 0x00
 100 } OnlineAnalyzeTableType;
 101
 102 static const struct config_enum_entry online_analyze_table_type_options[] =
 103 {
 104         {"all", OATT_ALL, false},
 105         {"persistent", OATT_PERSISTENT, false},
 106         {"temporary", OATT_TEMPORARY, false},
 107         {"none", OATT_NONE, false},
 108         {NULL, 0, false},
 109 };
 110
 111 static int online_analyze_table_type = (int)OATT_ALL;
 112
 113 typedef struct TableList {
 114         int             nTables;
 115         Oid             *tables;
 116         char    *tableStr;
 117 } TableList;
 118
 119 static TableList excludeTables = {0, NULL, NULL};
 120 static TableList includeTables = {0, NULL, NULL};
 121
 122 typedef struct OnlineAnalyzeTableStat {
 123         Oid                             tableid;
 124         bool                    rereadStat;
 125         PgStat_Counter  n_tuples;
 126         PgStat_Counter  changes_since_analyze;
 127         TimestampTz             autovac_analyze_timestamp;
 128         TimestampTz             analyze_timestamp;
 129 } OnlineAnalyzeTableStat;
 130
 131 static  MemoryContext   onlineAnalyzeMemoryContext = NULL;
 132 static  HTAB    *relstats = NULL;
 133
 134 static void relstatsInit(void);
 135
 136 #if PG_VERSION_NUM < 100000
 137 static int
 138 oid_cmp(const void *a, const void *b)
 139 {
 140         if (*(Oid*)a == *(Oid*)b)
 141                 return 0;
 142         return (*(Oid*)a > *(Oid*)b) ? 1 : -1;
 143 }
 144 #endif
 145
 146 static const char *
 147 tableListAssign(const char * newval, bool doit, TableList *tbl)
 148 {
 149         char            *rawname;
 150         List            *namelist;
 151         ListCell        *l;
 152         Oid                     *newOids = NULL;
 153         int                     nOids = 0,
 154                                 i = 0;
 155
 156         rawname = pstrdup(newval);
 157
 158         if (!SplitIdentifierString(rawname, ',', &namelist))
 159                 goto cleanup;
 160
 161         if (doit)
 162         {
 163                 nOids = list_length(namelist);
 164                 newOids = malloc(sizeof(Oid) * (nOids+1));
 165                 if (!newOids)
 166                         elog(ERROR,"could not allocate %d bytes",
 167                                  (int)(sizeof(Oid) * (nOids+1)));
 168         }
 169
 170         foreach(l, namelist)
 171         {
 172                 char    *curname = (char *) lfirst(l);
 173 #if PG_VERSION_NUM >= 90200
 174                 Oid             relOid = RangeVarGetRelid(makeRangeVarFromNameList(
 175                                                         stringToQualifiedNameList(curname)), NoLock, true);
 176 #else
 177                 Oid             relOid = RangeVarGetRelid(makeRangeVarFromNameList(
 178                                                         stringToQualifiedNameList(curname)), true);
 179 #endif
 180
 181                 if (relOid == InvalidOid)
 182                 {
 183 #if PG_VERSION_NUM >= 90100
 184                         if (doit == false)
 185 #endif
 186                         elog(WARNING,"'%s' does not exist", curname);
 187                         continue;
 188                 }
 189                 else if ( get_rel_relkind(relOid) != RELKIND_RELATION )
 190                 {
 191 #if PG_VERSION_NUM >= 90100
 192                         if (doit == false)
 193 #endif
 194                                 elog(WARNING,"'%s' is not an table", curname);
 195                         continue;
 196                 }
 197                 else if (doit)
 198                 {
 199                         newOids[i++] = relOid;
 200                 }
 201         }
 202
 203         if (doit)
 204         {
 205                 tbl->nTables = i;
 206                 if (tbl->tables)
 207                         free(tbl->tables);
 208                 tbl->tables = newOids;
 209                 if (tbl->nTables > 1)
 210                         qsort(tbl->tables, tbl->nTables, sizeof(tbl->tables[0]), oid_cmp);
 211         }
 212
 213         pfree(rawname);
 214         list_free(namelist);
 215
 216         return newval;
 217
 218 cleanup:
 219         if (newOids)
 220                 free(newOids);
 221         pfree(rawname);
 222         list_free(namelist);
 223         return NULL;
 224 }
 225
 226 #if PG_VERSION_NUM >= 90100
 227 static bool
 228 excludeTablesCheck(char **newval, void **extra, GucSource source)
 229 {
 230         char *val;
 231
 232         val = (char*)tableListAssign(*newval, false, &excludeTables);
 233
 234         if (val)
 235         {
 236                 *newval = val;
 237                 return true;
 238         }
 239
 240         return false;
 241 }
 242
 243 static void
 244 excludeTablesAssign(const char *newval, void *extra)
 245 {
 246         tableListAssign(newval, true, &excludeTables);
 247 }
 248
 249 static bool
 250 includeTablesCheck(char **newval, void **extra, GucSource source)
 251 {
 252         char *val;
 253
 254         val = (char*)tableListAssign(*newval, false, &includeTables);
 255
 256         if (val)
 257         {
 258                 *newval = val;
 259                 return true;
 260         }
 261
 262         return false;
 263 }
 264
 265 static void
 266 includeTablesAssign(const char *newval, void *extra)
 267 {
 268         tableListAssign(newval, true, &excludeTables);
 269 }
 270
 271 #else /* PG_VERSION_NUM < 90100 */
 272
 273 static const char *
 274 excludeTablesAssign(const char * newval, bool doit, GucSource source)
 275 {
 276         return tableListAssign(newval, doit, &excludeTables);
 277 }
 278
 279 static const char *
 280 includeTablesAssign(const char * newval, bool doit, GucSource source)
 281 {
 282         return tableListAssign(newval, doit, &includeTables);
 283 }
 284
 285 #endif
 286
 287 static const char*
 288 tableListShow(TableList *tbl)
 289 {
 290         char    *val, *ptr;
 291         int             i,
 292                         len;
 293
 294         len = 1 /* \0 */ + tbl->nTables * (2 * NAMEDATALEN + 2 /* ', ' */ + 1 /* . */);
 295         ptr = val = palloc(len);
 296         *ptr ='\0';
 297         for(i=0; i<tbl->nTables; i++)
 298         {
 299                 char    *relname = get_rel_name(tbl->tables[i]);
 300                 Oid             nspOid = get_rel_namespace(tbl->tables[i]);
 301                 char    *nspname = get_namespace_name(nspOid);
 302
 303                 if ( relname == NULL || nspOid == InvalidOid || nspname == NULL )
 304                         continue;
 305
 306                 ptr += snprintf(ptr, len - (ptr - val), "%s%s.%s",
 307                                                                                                         (i==0) ? "" : ", ",
 308                                                                                                         nspname, relname);
 309         }
 310
 311         return val;
 312 }
 313
 314 static const char*
 315 excludeTablesShow(void)
 316 {
 317         return tableListShow(&excludeTables);
 318 }
 319
 320 static const char*
 321 includeTablesShow(void)
 322 {
 323         return tableListShow(&includeTables);
 324 }
 325
 326 static bool
 327 matchOid(TableList *tbl, Oid oid)
 328 {
 329         Oid     *StopLow = tbl->tables,
 330                 *StopHigh = tbl->tables + tbl->nTables,
 331                 *StopMiddle;
 332
 333         /* Loop invariant: StopLow <= val < StopHigh */
 334         while (StopLow < StopHigh)
 335         {
 336                 StopMiddle = StopLow + ((StopHigh - StopLow) >> 1);
 337
 338                 if (*StopMiddle == oid)
 339                         return true;
 340                 else  if (*StopMiddle < oid)
 341                         StopLow = StopMiddle + 1;
 342                 else
 343                         StopHigh = StopMiddle;
 344         }
 345
 346         return false;
 347 }
 348
 349 #if PG_VERSION_NUM >= 90500
 350 static RangeVar*
 351 makeRangeVarFromOid(Oid relOid)
 352 {
 353         return makeRangeVar(
 354                                 get_namespace_name(get_rel_namespace(relOid)),
 355                                 get_rel_name(relOid),
 356                                 -1
 357                         );
 358
 359 }
 360 #endif
 361
 362 static void
 363 makeAnalyze(Oid relOid, CmdKind operation, int64 naffected)
 364 {
 365         TimestampTz                             now = GetCurrentTimestamp();
 366         Relation                                rel;
 367         OnlineAnalyzeTableType  reltype;
 368         bool                                    found = false,
 369                                                         newTable = false;
 370         OnlineAnalyzeTableStat  *rstat,
 371                                                         dummyrstat;
 372         PgStat_StatTabEntry             *tabentry = NULL;
 373
 374         if (relOid == InvalidOid)
 375                 return;
 376
 377         if (naffected == 0)
 378                 /* return if there is no changes */
 379                 return;
 380         else if (naffected < 0)
 381                 /* number if affected rows is unknown */
 382                 naffected = 0;
 383
 384         rel = RelationIdGetRelation(relOid);
 385         if (rel->rd_rel->relkind != RELKIND_RELATION)
 386         {
 387                 RelationClose(rel);
 388                 return;
 389         }
 390
 391         reltype =
 392 #if PG_VERSION_NUM >= 90100
 393                 (rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP)
 394 #else
 395                 (rel->rd_istemp || rel->rd_islocaltemp)
 396 #endif
 397                         ? OATT_TEMPORARY : OATT_PERSISTENT;
 398
 399         RelationClose(rel);
 400
 401         /*
 402          * includeTables overwrites excludeTables
 403          */
 404         switch(online_analyze_table_type)
 405         {
 406                 case OATT_ALL:
 407                         if (get_rel_relkind(relOid) != RELKIND_RELATION ||
 408                                 (matchOid(&excludeTables, relOid) == true &&
 409                                 matchOid(&includeTables, relOid) == false))
 410                                 return;
 411                         break;
 412                 case OATT_NONE:
 413                         if (get_rel_relkind(relOid) != RELKIND_RELATION ||
 414                                 matchOid(&includeTables, relOid) == false)
 415                                 return;
 416                         break;
 417                 case OATT_TEMPORARY:
 418                 case OATT_PERSISTENT:
 419                 default:
 420                         /*
 421                          * skip analyze if relation's type doesn't not match
 422                          * online_analyze_table_type
 423                          */
 424                         if ((online_analyze_table_type & reltype) == 0 ||
 425                                 matchOid(&excludeTables, relOid) == true)
 426                         {
 427                                 if (matchOid(&includeTables, relOid) == false)
 428                                         return;
 429                         }
 430                         break;
 431         }
 432
 433         /*
 434          * Do not store data about persistent table in local memory because we
 435          * could not track changes of them: they could be changed by another
 436          * backends. So always get a pgstat table entry.
 437          */
 438         if (reltype == OATT_TEMPORARY)
 439                 rstat = hash_search(relstats, &relOid, HASH_ENTER, &found);
 440         else
 441                 rstat = &dummyrstat; /* found == false for following if */
 442
 443         if (!found)
 444         {
 445                 MemSet(rstat, 0, sizeof(*rstat));
 446                 rstat->tableid = relOid;
 447                 newTable = true;
 448         }
 449         else if (operation == CK_VACUUM)
 450         {
 451                 /* force reread becouse vacuum could change n_tuples */
 452                 rstat->rereadStat = true;
 453                 return;
 454         }
 455         else if (operation == CK_ANALYZE)
 456         {
 457                 /* only analyze */
 458                 rstat->changes_since_analyze = 0;
 459                 rstat->analyze_timestamp = now;
 460                 return;
 461         }
 462
 463         Assert(rstat->tableid == relOid);
 464
 465         if (
 466                 /* do not reread data if it was a truncation */
 467                 operation != CK_TRUNCATE && operation != CK_FASTTRUNCATE &&
 468                 /* read  for persistent table and for temp teble if it allowed */
 469                 (reltype == OATT_PERSISTENT || online_analyze_local_tracking == false) &&
 470                 /* read only for new table or we know that it's needed */
 471                 (newTable == true || rstat->rereadStat == true)
 472            )
 473         {
 474                 rstat->rereadStat = false;
 475
 476                 tabentry = pgstat_fetch_stat_tabentry(relOid);
 477
 478                 if (tabentry)
 479                 {
 480                         rstat->n_tuples = tabentry->n_dead_tuples + tabentry->n_live_tuples;
 481                         rstat->changes_since_analyze =
 482 #if PG_VERSION_NUM >= 90000
 483                                 tabentry->changes_since_analyze;
 484 #else
 485                                 tabentry->n_live_tuples + tabentry->n_dead_tuples -
 486                                         tabentry->last_anl_tuples;
 487 #endif
 488                         rstat->autovac_analyze_timestamp =
 489                                 tabentry->autovac_analyze_timestamp;
 490                         rstat->analyze_timestamp = tabentry->analyze_timestamp;
 491                 }
 492         }
 493
 494         if (newTable ||
 495                 /* force analyze after truncate, fasttruncate already did analyze */
 496                 operation == CK_TRUNCATE || (
 497                 /* do not analyze too often, if both stamps are exceeded the go */
 498                 TimestampDifferenceExceeds(rstat->analyze_timestamp, now, online_analyze_min_interval) &&
 499                 TimestampDifferenceExceeds(rstat->autovac_analyze_timestamp, now, online_analyze_min_interval) &&
 500                 /* do not analyze too small tables */
 501                 rstat->n_tuples + rstat->changes_since_analyze + naffected > online_analyze_lower_limit &&
 502                 /* be in sync with relation_needs_vacanalyze */
 503                 ((double)(rstat->changes_since_analyze + naffected)) >=
 504                          online_analyze_scale_factor * ((double)rstat->n_tuples) +
 505                          (double)online_analyze_threshold))
 506         {
 507 #if PG_VERSION_NUM < 90500
 508                 VacuumStmt                              vacstmt;
 509 #else
 510                 VacuumParams                    vacstmt;
 511 #endif
 512                 TimestampTz                             startStamp, endStamp;
 513
 514
 515                 memset(&startStamp, 0, sizeof(startStamp)); /* keep compiler quiet */
 516
 517                 memset(&vacstmt, 0, sizeof(vacstmt));
 518
 519                 vacstmt.freeze_min_age = -1;
 520                 vacstmt.freeze_table_age = -1; /* ??? */
 521
 522 #if PG_VERSION_NUM < 90500
 523                 vacstmt.type = T_VacuumStmt;
 524                 vacstmt.relation = NULL;
 525                 vacstmt.va_cols = NIL;
 526 #if PG_VERSION_NUM >= 90000
 527                 vacstmt.options = VACOPT_ANALYZE;
 528                 if (online_analyze_verbose)
 529                         vacstmt.options |= VACOPT_VERBOSE;
 530 #else
 531                 vacstmt.vacuum = vacstmt.full = false;
 532                 vacstmt.analyze = true;
 533                 vacstmt.verbose = online_analyze_verbose;
 534 #endif
 535 #else
 536                 vacstmt.multixact_freeze_min_age = -1;
 537                 vacstmt.multixact_freeze_table_age = -1;
 538                 vacstmt.log_min_duration = -1;
 539 #endif
 540
 541                 if (online_analyze_verbose)
 542                         startStamp = GetCurrentTimestamp();
 543
 544                 analyze_rel(relOid,
 545 #if PG_VERSION_NUM < 90500
 546                         &vacstmt
 547 #if PG_VERSION_NUM >= 90018
 548                         , true
 549 #endif
 550                         , GetAccessStrategy(BAS_VACUUM)
 551 #if (PG_VERSION_NUM >= 90000) && (PG_VERSION_NUM < 90004)
 552                         , true
 553 #endif
 554 #else
 555                         makeRangeVarFromOid(relOid),
 556                         VACOPT_ANALYZE | ((online_analyze_verbose) ? VACOPT_VERBOSE : 0),
 557                         &vacstmt, NULL, true, GetAccessStrategy(BAS_VACUUM)
 558 #endif
 559                 );
 560
 561                 if (online_analyze_verbose)
 562                 {
 563                         long    secs;
 564                         int             microsecs;
 565
 566                         endStamp = GetCurrentTimestamp();
 567                         TimestampDifference(startStamp, endStamp, &secs, &microsecs);
 568                         elog(INFO, "analyze \"%s\" took %.02f seconds",
 569                                 get_rel_name(relOid),
 570                                 ((double)secs) + ((double)microsecs)/1.0e6);
 571                 }
 572
 573                 rstat->autovac_analyze_timestamp = now;
 574                 rstat->changes_since_analyze = 0;
 575
 576                 switch(operation)
 577                 {
 578                         case CK_CREATE:
 579                         case CK_INSERT:
 580                         case CK_UPDATE:
 581                                 rstat->n_tuples += naffected;
 582                         case CK_DELETE:
 583                                 rstat->rereadStat = (reltype == OATT_PERSISTENT);
 584                                 break;
 585                         case CK_TRUNCATE:
 586                         case CK_FASTTRUNCATE:
 587                                 rstat->rereadStat = false;
 588                                 rstat->n_tuples = 0;
 589                                 break;
 590                         default:
 591                                 break;
 592                 }
 593
 594                 /* update last analyze timestamp in local memory of backend */
 595                 if (tabentry)
 596                 {
 597                         tabentry->analyze_timestamp = now;
 598                         tabentry->changes_since_analyze = 0;
 599                 }
 600 #if 0
 601                 /* force reload stat for new table */
 602                 if (newTable)
 603                         pgstat_clear_snapshot();
 604 #endif
 605         }
 606         else
 607         {
 608 #if PG_VERSION_NUM >= 90000
 609                 if (tabentry)
 610                         tabentry->changes_since_analyze += naffected;
 611 #endif
 612                 switch(operation)
 613                 {
 614                         case CK_CREATE:
 615                         case CK_INSERT:
 616                                 rstat->changes_since_analyze += naffected;
 617                                 rstat->n_tuples += naffected;
 618                                 break;
 619                         case CK_UPDATE:
 620                                 rstat->changes_since_analyze += 2 * naffected;
 621                                 rstat->n_tuples += naffected;
 622                         case CK_DELETE:
 623                                 rstat->changes_since_analyze += naffected;
 624                                 break;
 625                         case CK_TRUNCATE:
 626                         case CK_FASTTRUNCATE:
 627                                 rstat->changes_since_analyze = 0;
 628                                 rstat->n_tuples = 0;
 629                                 break;
 630                         default:
 631                                 break;
 632                 }
 633         }
 634
 635         /* Reset local cache if we are over limit */
 636         if (hash_get_num_entries(relstats) > online_analyze_capacity_threshold)
 637                 relstatsInit();
 638 }
 639
 640 static Const*
 641 isFastTruncateCall(QueryDesc *queryDesc)
 642 {
 643         TargetEntry     *te;
 644         FuncExpr        *fe;
 645         Const           *constval;
 646
 647         if (!(
 648                   queryDesc->plannedstmt &&
 649                   queryDesc->operation == CMD_SELECT &&
 650                   queryDesc->plannedstmt->planTree &&
 651                   queryDesc->plannedstmt->planTree->targetlist &&
 652                   list_length(queryDesc->plannedstmt->planTree->targetlist) == 1 &&
 653                   IsA(linitial(queryDesc->plannedstmt->planTree->targetlist), TargetEntry)
 654                  ))
 655                 return NULL;
 656
 657         te = linitial(queryDesc->plannedstmt->planTree->targetlist);
 658
 659         if (!IsA(te, TargetEntry))
 660                 return NULL;
 661
 662         fe = (FuncExpr*)te->expr;
 663
 664         if (!(
 665                   fe && IsA(fe, FuncExpr) &&
 666                   fe->funcid >= FirstNormalObjectId &&
 667                   fe->funcretset == false &&
 668                   fe->funcresulttype == VOIDOID &&
 669                   fe->funcvariadic == false &&
 670                   list_length(fe->args) == 1 &&
 671                   IsA(linitial(fe->args), Const)
 672                  ))
 673                 return NULL;
 674
 675         constval = linitial(fe->args);
 676
 677         if (!(
 678                   IsA(constval,Const) &&
 679                   constval->consttype == TEXTOID &&
 680                   strcmp(get_func_name(fe->funcid), "fasttruncate") == 0
 681                  ))
 682                 return NULL;
 683
 684         return constval;
 685 }
 686
 687
 688
 689 extern PGDLLIMPORT void onlineAnalyzeHooker(QueryDesc *queryDesc);
 690 void
 691 onlineAnalyzeHooker(QueryDesc *queryDesc)
 692 {
 693         int64   naffected = -1;
 694         Const   *constval;
 695
 696         if (queryDesc->estate)
 697                 naffected = queryDesc->estate->es_processed;
 698
 699 #if PG_VERSION_NUM >= 90200
 700         if (online_analyze_enable &&
 701                 (constval = isFastTruncateCall(queryDesc)) != NULL)
 702         {
 703                 Datum           tblnamed = constval->constvalue;
 704                 char            *tblname = text_to_cstring(DatumGetTextP(tblnamed));
 705                 RangeVar        *tblvar =
 706                         makeRangeVarFromNameList(stringToQualifiedNameList(tblname));
 707
 708                 makeAnalyze(RangeVarGetRelid(tblvar,
 709                                                                          NoLock,
 710                                                                          false),
 711                                         CK_FASTTRUNCATE, -1);
 712         }
 713 #endif
 714
 715         if (online_analyze_enable && queryDesc->plannedstmt &&
 716                         (queryDesc->operation == CMD_INSERT ||
 717                          queryDesc->operation == CMD_UPDATE ||
 718                          queryDesc->operation == CMD_DELETE
 719 #if PG_VERSION_NUM < 90200
 720                          || (queryDesc->operation == CMD_SELECT &&
 721                                  queryDesc->plannedstmt->intoClause)
 722 #endif
 723                          ))
 724         {
 725 #if PG_VERSION_NUM < 90200
 726                 if (queryDesc->operation == CMD_SELECT)
 727                 {
 728                         Oid     relOid = RangeVarGetRelid(queryDesc->plannedstmt->intoClause->rel, true);
 729
 730                         makeAnalyze(relOid, queryDesc->operation, naffected);
 731                 }
 732                 else
 733 #endif
 734                 if (queryDesc->plannedstmt->resultRelations &&
 735                                  queryDesc->plannedstmt->rtable)
 736                 {
 737                         ListCell        *l;
 738
 739                         foreach(l, queryDesc->plannedstmt->resultRelations)
 740                         {
 741                                 int                             n = lfirst_int(l);
 742                                 RangeTblEntry   *rte = list_nth(queryDesc->plannedstmt->rtable, n-1);
 743
 744                                 if (rte->rtekind == RTE_RELATION)
 745                                         makeAnalyze(rte->relid, (CmdKind)queryDesc->operation, naffected);
 746                         }
 747                 }
 748         }
 749
 750         if (oldExecutorEndHook)
 751                 oldExecutorEndHook(queryDesc);
 752         else
 753                 standard_ExecutorEnd(queryDesc);
 754 }
 755
 756 static void
 757 removeTable(XactEvent event, void *arg)
 758 {
 759         List            *toremove = arg;
 760         ListCell        *cell;
 761
 762         if (event != XACT_EVENT_COMMIT)
 763                 return;
 764
 765         foreach(cell, toremove)
 766         {
 767                 Oid     relOid = lfirst_oid(cell);
 768
 769                 hash_search(relstats, &relOid, HASH_REMOVE, NULL);
 770         }
 771 }
 772
 773
 774 #if PG_VERSION_NUM >= 90200
 775 static void
 776 onlineAnalyzeHookerUtility(
 777 #if PG_VERSION_NUM >= 100000
 778                                                    PlannedStmt *pstmt,
 779 #else
 780                                                    Node *parsetree,
 781 #endif
 782                                                    const char *queryString,
 783 #if PG_VERSION_NUM >= 90300
 784                                                         ProcessUtilityContext context, ParamListInfo params,
 785 #if PG_VERSION_NUM >= 100000
 786                                                         QueryEnvironment *queryEnv,
 787 #endif
 788 #else
 789                                                         ParamListInfo params, bool isTopLevel,
 790 #endif
 791                                                         DestReceiver *dest, char *completionTag) {
 792         List            *tblnames = NIL;
 793         CmdKind         op = CK_INSERT;
 794 #if PG_VERSION_NUM >= 100000
 795         Node            *parsetree = NULL;
 796
 797         if (pstmt->commandType == CMD_UTILITY)
 798                 parsetree = pstmt->utilityStmt;
 799 #endif
 800
 801         if (parsetree && online_analyze_enable)
 802         {
 803                 if (IsA(parsetree, CreateTableAsStmt) &&
 804                         ((CreateTableAsStmt*)parsetree)->into)
 805                 {
 806                         tblnames =
 807                                 list_make1((RangeVar*)copyObject(((CreateTableAsStmt*)parsetree)->into->rel));
 808                         op = CK_CREATE;
 809                 }
 810                 else if (IsA(parsetree, TruncateStmt))
 811                 {
 812                         tblnames = list_copy(((TruncateStmt*)parsetree)->relations);
 813                         op = CK_TRUNCATE;
 814                 }
 815                 else if (IsA(parsetree, DropStmt) &&
 816                                  ((DropStmt*)parsetree)->removeType == OBJECT_TABLE)
 817                 {
 818                         ListCell        *cell;
 819                         List            *toremove = NIL;
 820
 821                         foreach(cell, ((DropStmt*)parsetree)->objects)
 822                         {
 823                                 List            *relname = (List *) lfirst(cell);
 824                                 RangeVar        *rel = makeRangeVarFromNameList(relname);
 825                                 Oid                     relOid = RangeVarGetRelid(rel, NoLock, true);
 826
 827                                 if (OidIsValid(relOid))
 828                                 {
 829                                         MemoryContext   ctx;
 830
 831                                         ctx = MemoryContextSwitchTo(TopTransactionContext);
 832                                         toremove = lappend_oid(toremove, relOid);
 833                                         MemoryContextSwitchTo(ctx);
 834                                 }
 835                         }
 836
 837                         if (list_length(toremove) > 0)
 838                                 RegisterXactCallback(removeTable, toremove);
 839                 }
 840                 else if (IsA(parsetree, VacuumStmt))
 841                 {
 842                         VacuumStmt      *vac = (VacuumStmt*)parsetree;
 843
 844                         tblnames = list_make1(vac->relation);
 845
 846                         if (vac->options & (VACOPT_VACUUM | VACOPT_FULL | VACOPT_FREEZE))
 847                                 /* optionally with analyze */
 848                                 op = CK_VACUUM;
 849                         else if (vac->options & VACOPT_ANALYZE)
 850                                 op = CK_ANALYZE;
 851                         else
 852                                 tblnames = NIL;
 853                 }
 854         }
 855
 856 #if PG_VERSION_NUM >= 100000
 857 #define parsetree pstmt
 858 #endif
 859
 860         if (oldProcessUtilityHook)
 861                 oldProcessUtilityHook(parsetree, queryString,
 862 #if PG_VERSION_NUM >= 90300
 863                                                           context, params,
 864 #if PG_VERSION_NUM >= 100000
 865                                                           queryEnv,
 866 #endif
 867 #else
 868                                                           params, isTopLevel,
 869 #endif
 870                                                           dest, completionTag);
 871         else
 872                 standard_ProcessUtility(parsetree, queryString,
 873 #if PG_VERSION_NUM >= 90300
 874                                                                 context, params,
 875 #if PG_VERSION_NUM >= 100000
 876                                                                 queryEnv,
 877 #endif
 878 #else
 879                                                                 params, isTopLevel,
 880 #endif
 881                                                                 dest, completionTag);
 882
 883 #if PG_VERSION_NUM >= 100000
 884 #undef parsetree
 885 #endif
 886
 887         if (tblnames) {
 888                 ListCell        *l;
 889
 890                 foreach(l, tblnames)
 891                 {
 892                         RangeVar        *tblname = (RangeVar*)lfirst(l);
 893                         Oid     tblOid = RangeVarGetRelid(tblname, NoLock, true);
 894
 895                         makeAnalyze(tblOid, op, -1);
 896                 }
 897         }
 898 }
 899 #endif
 900
 901 static void
 902 relstatsInit(void)
 903 {
 904         HASHCTL hash_ctl;
 905         int             flags = 0;
 906
 907         MemSet(&hash_ctl, 0, sizeof(hash_ctl));
 908
 909         hash_ctl.hash = oid_hash;
 910         flags |= HASH_FUNCTION;
 911
 912         if (onlineAnalyzeMemoryContext)
 913         {
 914                 Assert(relstats != NULL);
 915                 MemoryContextReset(onlineAnalyzeMemoryContext);
 916         }
 917         else
 918         {
 919                 Assert(relstats == NULL);
 920                 onlineAnalyzeMemoryContext =
 921                         AllocSetContextCreate(CacheMemoryContext,
 922                                                                   "online_analyze storage context",
 923 #if PG_VERSION_NUM < 90600
 924                                                                   ALLOCSET_DEFAULT_MINSIZE,
 925                                                                   ALLOCSET_DEFAULT_INITSIZE,
 926                                                                   ALLOCSET_DEFAULT_MAXSIZE
 927 #else
 928                                                                   ALLOCSET_DEFAULT_SIZES
 929 #endif
 930                                                                  );
 931         }
 932
 933         hash_ctl.hcxt = onlineAnalyzeMemoryContext;
 934         flags |= HASH_CONTEXT;
 935
 936         hash_ctl.keysize = sizeof(Oid);
 937
 938         hash_ctl.entrysize = sizeof(OnlineAnalyzeTableStat);
 939         flags |= HASH_ELEM;
 940
 941         relstats = hash_create("online_analyze storage", 1024, &hash_ctl, flags);
 942 }
 943
 944 void _PG_init(void);
 945 void
 946 _PG_init(void)
 947 {
 948         relstatsInit();
 949
 950         oldExecutorEndHook = ExecutorEnd_hook;
 951
 952         ExecutorEnd_hook = onlineAnalyzeHooker;
 953
 954 #if PG_VERSION_NUM >= 90200
 955         oldProcessUtilityHook = ProcessUtility_hook;
 956
 957         ProcessUtility_hook = onlineAnalyzeHookerUtility;
 958 #endif
 959
 960
 961         DefineCustomBoolVariable(
 962                 "online_analyze.enable",
 963                 "Enable on-line analyze",
 964                 "Enables analyze of table directly after insert/update/delete/select into",
 965                 &online_analyze_enable,
 966 #if PG_VERSION_NUM >= 80400
 967                 online_analyze_enable,
 968 #endif
 969                 PGC_USERSET,
 970 #if PG_VERSION_NUM >= 80400
 971                 GUC_NOT_IN_SAMPLE,
 972 #if PG_VERSION_NUM >= 90100
 973                 NULL,
 974 #endif
 975 #endif
 976                 NULL,
 977                 NULL
 978         );
 979
 980         DefineCustomBoolVariable(
 981                 "online_analyze.local_tracking",
 982                 "Per backend tracking",
 983                 "Per backend tracking for temp tables (do not use system statistic)",
 984                 &online_analyze_local_tracking,
 985 #if PG_VERSION_NUM >= 80400
 986                 online_analyze_local_tracking,
 987 #endif
 988                 PGC_USERSET,
 989 #if PG_VERSION_NUM >= 80400
 990                 GUC_NOT_IN_SAMPLE,
 991 #if PG_VERSION_NUM >= 90100
 992                 NULL,
 993 #endif
 994 #endif
 995                 NULL,
 996                 NULL
 997         );
 998
 999         DefineCustomBoolVariable(
1000                 "online_analyze.verbose",
1001                 "Verbosity of on-line analyze",
1002                 "Make ANALYZE VERBOSE after table's changes",
1003                 &online_analyze_verbose,
1004 #if PG_VERSION_NUM >= 80400
1005                 online_analyze_verbose,
1006 #endif
1007                 PGC_USERSET,
1008 #if PG_VERSION_NUM >= 80400
1009                 GUC_NOT_IN_SAMPLE,
1010 #if PG_VERSION_NUM >= 90100
1011                 NULL,
1012 #endif
1013 #endif
1014                 NULL,
1015                 NULL
1016         );
1017
1018         DefineCustomRealVariable(
1019                 "online_analyze.scale_factor",
1020                 "fraction of table size to start on-line analyze",
1021                 "fraction of table size to start on-line analyze",
1022                 &online_analyze_scale_factor,
1023 #if PG_VERSION_NUM >= 80400
1024                 online_analyze_scale_factor,
1025 #endif
1026                 0.0,
1027                 1.0,
1028                 PGC_USERSET,
1029 #if PG_VERSION_NUM >= 80400
1030                 GUC_NOT_IN_SAMPLE,
1031 #if PG_VERSION_NUM >= 90100
1032                 NULL,
1033 #endif
1034 #endif
1035                 NULL,
1036                 NULL
1037         );
1038
1039         DefineCustomIntVariable(
1040                 "online_analyze.threshold",
1041                 "min number of row updates before on-line analyze",
1042                 "min number of row updates before on-line analyze",
1043                 &online_analyze_threshold,
1044 #if PG_VERSION_NUM >= 80400
1045                 online_analyze_threshold,
1046 #endif
1047                 0,
1048                 0x7fffffff,
1049                 PGC_USERSET,
1050 #if PG_VERSION_NUM >= 80400
1051                 GUC_NOT_IN_SAMPLE,
1052 #if PG_VERSION_NUM >= 90100
1053                 NULL,
1054 #endif
1055 #endif
1056                 NULL,
1057                 NULL
1058         );
1059
1060         DefineCustomIntVariable(
1061                 "online_analyze.capacity_threshold",
1062                 "Max local cache table capacity",
1063                 "Max local cache table capacity",
1064                 &online_analyze_capacity_threshold,
1065 #if PG_VERSION_NUM >= 80400
1066                 online_analyze_capacity_threshold,
1067 #endif
1068                 0,
1069                 0x7fffffff,
1070                 PGC_USERSET,
1071 #if PG_VERSION_NUM >= 80400
1072                 GUC_NOT_IN_SAMPLE,
1073 #if PG_VERSION_NUM >= 90100
1074                 NULL,
1075 #endif
1076 #endif
1077                 NULL,
1078                 NULL
1079         );
1080
1081         DefineCustomRealVariable(
1082                 "online_analyze.min_interval",
1083                 "minimum time interval between analyze call (in milliseconds)",
1084                 "minimum time interval between analyze call (in milliseconds)",
1085                 &online_analyze_min_interval,
1086 #if PG_VERSION_NUM >= 80400
1087                 online_analyze_min_interval,
1088 #endif
1089                 0.0,
1090                 1e30,
1091                 PGC_USERSET,
1092 #if PG_VERSION_NUM >= 80400
1093                 GUC_NOT_IN_SAMPLE,
1094 #if PG_VERSION_NUM >= 90100
1095                 NULL,
1096 #endif
1097 #endif
1098                 NULL,
1099                 NULL
1100         );
1101
1102         DefineCustomEnumVariable(
1103                 "online_analyze.table_type",
1104                 "Type(s) of table for online analyze: all(default), persistent, temporary, none",
1105                 NULL,
1106                 &online_analyze_table_type,
1107 #if PG_VERSION_NUM >= 80400
1108                 online_analyze_table_type,
1109 #endif
1110                 online_analyze_table_type_options,
1111                 PGC_USERSET,
1112 #if PG_VERSION_NUM >= 80400
1113                 GUC_NOT_IN_SAMPLE,
1114 #if PG_VERSION_NUM >= 90100
1115                 NULL,
1116 #endif
1117 #endif
1118                 NULL,
1119                 NULL
1120         );
1121
1122         DefineCustomStringVariable(
1123                 "online_analyze.exclude_tables",
1124                 "List of tables which will not online analyze",
1125                 NULL,
1126                 &excludeTables.tableStr,
1127 #if PG_VERSION_NUM >= 80400
1128                 "",
1129 #endif
1130                 PGC_USERSET,
1131                 0,
1132 #if PG_VERSION_NUM >= 90100
1133                 excludeTablesCheck,
1134                 excludeTablesAssign,
1135 #else
1136                 excludeTablesAssign,
1137 #endif
1138                 excludeTablesShow
1139         );
1140
1141         DefineCustomStringVariable(
1142                 "online_analyze.include_tables",
1143                 "List of tables which will online analyze",
1144                 NULL,
1145                 &includeTables.tableStr,
1146 #if PG_VERSION_NUM >= 80400
1147                 "",
1148 #endif
1149                 PGC_USERSET,
1150                 0,
1151 #if PG_VERSION_NUM >= 90100
1152                 includeTablesCheck,
1153                 includeTablesAssign,
1154 #else
1155                 includeTablesAssign,
1156 #endif
1157                 includeTablesShow
1158         );
1159
1160         DefineCustomIntVariable(
1161                 "online_analyze.lower_limit",
1162                 "min number of rows in table to analyze",
1163                 "min number of rows in table to analyze",
1164                 &online_analyze_lower_limit,
1165 #if PG_VERSION_NUM >= 80400
1166                 online_analyze_lower_limit,
1167 #endif
1168                 0,
1169                 0x7fffffff,
1170                 PGC_USERSET,
1171 #if PG_VERSION_NUM >= 80400
1172                 GUC_NOT_IN_SAMPLE,
1173 #if PG_VERSION_NUM >= 90100
1174                 NULL,
1175 #endif
1176 #endif
1177                 NULL,
1178                 NULL
1179         );
1180
1181 }
1182
1183 void _PG_fini(void);
1184 void
1185 _PG_fini(void)
1186 {
1187         ExecutorEnd_hook = oldExecutorEndHook;
1188 #if PG_VERSION_NUM >= 90200
1189         ProcessUtility_hook = oldProcessUtilityHook;
1190 #endif
1191
1192         if (excludeTables.tables)
1193                 free(excludeTables.tables);
1194         if (includeTables.tables)
1195                 free(includeTables.tables);
1196
1197         excludeTables.tables = includeTables.tables = NULL;
1198         excludeTables.nTables = includeTables.nTables = 0;
1199 }