src/backend/tcop/utility.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * utility.c
   4  *        Contains functions which control the execution of the POSTGRES utility
   5  *        commands.  At one time acted as an interface between the Lisp and C
   6  *        systems.
   7  *
   8  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
   9  * Portions Copyright (c) 1994, Regents of the University of California
  10  *
  11  *
  12  * IDENTIFICATION
  13  *        $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.118 2001/09/18 01:59:06 tgl Exp $
  14  *
  15  *-------------------------------------------------------------------------
  16  */
  17 #include "postgres.h"
  18
  19 #include "access/heapam.h"
  20 #include "catalog/catalog.h"
  21 #include "catalog/pg_shadow.h"
  22 #include "commands/async.h"
  23 #include "commands/cluster.h"
  24 #include "commands/command.h"
  25 #include "commands/comment.h"
  26 #include "commands/copy.h"
  27 #include "commands/creatinh.h"
  28 #include "commands/dbcommands.h"
  29 #include "commands/defrem.h"
  30 #include "commands/explain.h"
  31 #include "commands/proclang.h"
  32 #include "commands/rename.h"
  33 #include "commands/sequence.h"
  34 #include "commands/trigger.h"
  35 #include "commands/user.h"
  36 #include "commands/vacuum.h"
  37 #include "commands/variable.h"
  38 #include "commands/view.h"
  39 #include "miscadmin.h"
  40 #include "parser/parse.h"
  41 #include "parser/parse_clause.h"
  42 #include "parser/parse_expr.h"
  43 #include "rewrite/rewriteDefine.h"
  44 #include "rewrite/rewriteRemove.h"
  45 #include "tcop/utility.h"
  46 #include "utils/acl.h"
  47 #include "utils/ps_status.h"
  48 #include "utils/syscache.h"
  49 #include "utils/temprel.h"
  50 #include "access/xlog.h"
  51
  52 /*
  53  * Error-checking support for DROP commands
  54  */
  55
  56 struct kindstrings
  57 {
  58         char            kind;
  59         char       *indef_article;
  60         char       *name;
  61         char       *command;
  62 };
  63
  64 static struct kindstrings kindstringarray[] = {
  65         {RELKIND_RELATION, "a", "table", "TABLE"},
  66         {RELKIND_SEQUENCE, "a", "sequence", "SEQUENCE"},
  67         {RELKIND_VIEW, "a", "view", "VIEW"},
  68         {RELKIND_INDEX, "an", "index", "INDEX"},
  69         {'\0', "a", "???", "???"}
  70 };
  71
  72
  73 static void
  74 DropErrorMsg(char *relname, char wrongkind, char rightkind)
  75 {
  76         struct kindstrings *rentry;
  77         struct kindstrings *wentry;
  78
  79         for (rentry = kindstringarray; rentry->kind != '\0'; rentry++)
  80                 if (rentry->kind == rightkind)
  81                         break;
  82         Assert(rentry->kind != '\0');
  83
  84         for (wentry = kindstringarray; wentry->kind != '\0'; wentry++)
  85                 if (wentry->kind == wrongkind)
  86                         break;
  87         /* wrongkind could be something we don't have in our table... */
  88         if (wentry->kind != '\0')
  89                 elog(ERROR, "\"%s\" is not %s %s. Use DROP %s to remove %s %s",
  90                          relname, rentry->indef_article, rentry->name,
  91                          wentry->command, wentry->indef_article, wentry->name);
  92         else
  93                 elog(ERROR, "\"%s\" is not %s %s",
  94                          relname, rentry->indef_article, rentry->name);
  95 }
  96
  97 static void
  98 CheckDropPermissions(char *name, char rightkind)
  99 {
 100         struct kindstrings *rentry;
 101         HeapTuple       tuple;
 102         Form_pg_class classform;
 103
 104         for (rentry = kindstringarray; rentry->kind != '\0'; rentry++)
 105                 if (rentry->kind == rightkind)
 106                         break;
 107         Assert(rentry->kind != '\0');
 108
 109         tuple = SearchSysCache(RELNAME,
 110                                                    PointerGetDatum(name),
 111                                                    0, 0, 0);
 112         if (!HeapTupleIsValid(tuple))
 113                 elog(ERROR, "%s \"%s\" does not exist", rentry->name, name);
 114
 115         classform = (Form_pg_class) GETSTRUCT(tuple);
 116
 117         if (classform->relkind != rightkind)
 118                 DropErrorMsg(name, classform->relkind, rightkind);
 119
 120         if (!pg_ownercheck(GetUserId(), name, RELNAME))
 121                 elog(ERROR, "you do not own %s \"%s\"",
 122                          rentry->name, name);
 123
 124         if (!allowSystemTableMods && IsSystemRelationName(name) &&
 125                 !is_temp_relname(name))
 126                 elog(ERROR, "%s \"%s\" is a system %s",
 127                          rentry->name, name, rentry->name);
 128
 129         ReleaseSysCache(tuple);
 130 }
 131
 132
 133 /* ----------------
 134  *              general utility function invoker
 135  * ----------------
 136  */
 137 void
 138 ProcessUtility(Node *parsetree,
 139                            CommandDest dest)
 140 {
 141         char       *commandTag = NULL;
 142         char       *relname;
 143         char       *relationName;
 144
 145         switch (nodeTag(parsetree))
 146         {
 147
 148                         /*
 149                          * ******************************** transactions ********************************
 150                          *
 151                          */
 152                 case T_TransactionStmt:
 153                         {
 154                                 TransactionStmt *stmt = (TransactionStmt *) parsetree;
 155
 156                                 switch (stmt->command)
 157                                 {
 158                                         case BEGIN_TRANS:
 159                                                 set_ps_display(commandTag = "BEGIN");
 160                                                 BeginTransactionBlock();
 161                                                 break;
 162
 163                                         case COMMIT:
 164                                                 set_ps_display(commandTag = "COMMIT");
 165                                                 EndTransactionBlock();
 166                                                 break;
 167
 168                                         case ROLLBACK:
 169                                                 set_ps_display(commandTag = "ROLLBACK");
 170                                                 UserAbortTransactionBlock();
 171                                                 break;
 172                                 }
 173                         }
 174                         break;
 175
 176                         /*
 177                          * ******************************** portal manipulation ********************************
 178                          *
 179                          */
 180                 case T_ClosePortalStmt:
 181                         {
 182                                 ClosePortalStmt *stmt = (ClosePortalStmt *) parsetree;
 183
 184                                 set_ps_display(commandTag = "CLOSE");
 185
 186                                 PerformPortalClose(stmt->portalname, dest);
 187                         }
 188                         break;
 189
 190                 case T_FetchStmt:
 191                         {
 192                                 FetchStmt  *stmt = (FetchStmt *) parsetree;
 193                                 char       *portalName = stmt->portalname;
 194                                 bool            forward;
 195                                 int                     count;
 196
 197                                 set_ps_display(commandTag = (stmt->ismove) ? "MOVE" : "FETCH");
 198
 199                                 SetQuerySnapshot();
 200
 201                                 forward = (bool) (stmt->direction == FORWARD);
 202
 203                                 /*
 204                                  * parser ensures that count is >= 0 and 'fetch ALL' -> 0
 205                                  */
 206
 207                                 count = stmt->howMany;
 208                                 PerformPortalFetch(portalName, forward, count, commandTag,
 209                                                                    (stmt->ismove) ? None : dest);               /* /dev/null for MOVE */
 210                         }
 211                         break;
 212
 213                         /*
 214                          * ******************************** relation and attribute
 215                          * manipulation ********************************
 216                          *
 217                          */
 218                 case T_CreateStmt:
 219                         set_ps_display(commandTag = "CREATE");
 220
 221                         DefineRelation((CreateStmt *) parsetree, RELKIND_RELATION);
 222
 223                         /*
 224                          * Let AlterTableCreateToastTable decide if this one needs a
 225                          * secondary relation too.
 226                          */
 227                         CommandCounterIncrement();
 228                         AlterTableCreateToastTable(((CreateStmt *) parsetree)->relname,
 229                                                                            true);
 230                         break;
 231
 232                 case T_DropStmt:
 233                         {
 234                                 DropStmt   *stmt = (DropStmt *) parsetree;
 235                                 List       *args = stmt->names;
 236                                 List       *arg;
 237
 238                                 set_ps_display(commandTag = "DROP");
 239
 240                                 foreach(arg, args)
 241                                 {
 242                                         relname = strVal(lfirst(arg));
 243
 244                                         switch (stmt->removeType)
 245                                         {
 246                                                 case DROP_TABLE:
 247                                                         CheckDropPermissions(relname, RELKIND_RELATION);
 248                                                         RemoveRelation(relname);
 249                                                         break;
 250
 251                                                 case DROP_SEQUENCE:
 252                                                         CheckDropPermissions(relname, RELKIND_SEQUENCE);
 253                                                         RemoveRelation(relname);
 254                                                         break;
 255
 256                                                 case DROP_VIEW:
 257                                                         CheckDropPermissions(relname, RELKIND_VIEW);
 258                                                         RemoveView(relname);
 259                                                         break;
 260
 261                                                 case DROP_INDEX:
 262                                                         CheckDropPermissions(relname, RELKIND_INDEX);
 263                                                         RemoveIndex(relname);
 264                                                         break;
 265
 266                                                 case DROP_RULE:
 267                                                         {
 268                                                                 char       *rulename = relname;
 269                                                                 int                     aclcheck_result;
 270
 271                                                                 relationName = RewriteGetRuleEventRel(rulename);
 272                                                                 aclcheck_result = pg_aclcheck(relationName, GetUserId(), ACL_RULE);
 273                                                                 if (aclcheck_result != ACLCHECK_OK)
 274                                                                         elog(ERROR, "%s: %s", relationName,
 275                                                                                  aclcheck_error_strings[aclcheck_result]);
 276                                                                 RemoveRewriteRule(rulename);
 277                                                         }
 278                                                         break;
 279
 280                                                 case DROP_TYPE_P:
 281                                                         /* RemoveType does its own permissions checks */
 282                                                         RemoveType(relname);
 283                                                         break;
 284                                         }
 285
 286                                         /*
 287                                          * Make sure subsequent loop iterations will see
 288                                          * results of this one; needed if removing multiple
 289                                          * rules for same table, for example.
 290                                          */
 291                                         CommandCounterIncrement();
 292                                 }
 293                         }
 294                         break;
 295
 296                 case T_TruncateStmt:
 297                         {
 298                                 Relation        rel;
 299
 300                                 set_ps_display(commandTag = "TRUNCATE");
 301
 302                                 relname = ((TruncateStmt *) parsetree)->relName;
 303                                 if (!allowSystemTableMods && IsSystemRelationName(relname))
 304                                         elog(ERROR, "TRUNCATE cannot be used on system tables. '%s' is a system table",
 305                                                  relname);
 306
 307                                 /* Grab exclusive lock in preparation for truncate... */
 308                                 rel = heap_openr(relname, AccessExclusiveLock);
 309                                 if (rel->rd_rel->relkind == RELKIND_SEQUENCE)
 310                                         elog(ERROR, "TRUNCATE cannot be used on sequences. '%s' is a sequence",
 311                                                  relname);
 312                                 if (rel->rd_rel->relkind == RELKIND_VIEW)
 313                                         elog(ERROR, "TRUNCATE cannot be used on views. '%s' is a sequence",
 314                                                  relname);
 315                                 heap_close(rel, NoLock);
 316
 317                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 318                                         elog(ERROR, "you do not own class \"%s\"", relname);
 319                                 TruncateRelation(relname);
 320                         }
 321                         break;
 322
 323                 case T_CommentStmt:
 324                         {
 325                                 CommentStmt *statement;
 326
 327                                 statement = ((CommentStmt *) parsetree);
 328
 329                                 set_ps_display(commandTag = "COMMENT");
 330
 331                                 CommentObject(statement->objtype, statement->objname,
 332                                                           statement->objproperty, statement->objlist,
 333                                                           statement->comment);
 334                         }
 335                         break;
 336
 337                 case T_CopyStmt:
 338                         {
 339                                 CopyStmt   *stmt = (CopyStmt *) parsetree;
 340
 341                                 set_ps_display(commandTag = "COPY");
 342
 343                                 if (stmt->direction != FROM)
 344                                         SetQuerySnapshot();
 345
 346                                 DoCopy(stmt->relname,
 347                                            stmt->binary,
 348                                            stmt->oids,
 349                                            (bool) (stmt->direction == FROM),
 350                                            (bool) (stmt->filename == NULL),
 351
 352                                 /*
 353                                  * null filename means copy to/from stdout/stdin, rather
 354                                  * than to/from a file.
 355                                  */
 356                                            stmt->filename,
 357                                            stmt->delimiter,
 358                                            stmt->null_print);
 359                         }
 360                         break;
 361
 362                         /*
 363                          * schema
 364                          */
 365                 case T_RenameStmt:
 366                         {
 367                                 RenameStmt *stmt = (RenameStmt *) parsetree;
 368
 369                                 set_ps_display(commandTag = "ALTER");
 370
 371                                 relname = stmt->relname;
 372                                 if (!allowSystemTableMods && IsSystemRelationName(relname))
 373                                         elog(ERROR, "ALTER TABLE: relation \"%s\" is a system catalog",
 374                                                  relname);
 375                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 376                                         elog(ERROR, "permission denied");
 377
 378                                 /* ----------------
 379                                  *      XXX using len == 3 to tell the difference
 380                                  *              between "rename rel to newrel" and
 381                                  *              "rename att in rel to newatt" will not
 382                                  *              work soon because "rename type/operator/rule"
 383                                  *              stuff is being added. - cim 10/24/90
 384                                  * ----------------
 385                                  * [another piece of amuzing but useless anecdote -- ay]
 386                                  */
 387                                 if (stmt->column == NULL)
 388                                 {
 389
 390                                         /*
 391                                          * rename relation
 392                                          *
 393                                          * Note: we also rename the "type" tuple corresponding to
 394                                          * the relation.
 395                                          */
 396                                         renamerel(relname,      /* old name */
 397                                                           stmt->newname);       /* new name */
 398                                 }
 399                                 else
 400                                 {
 401
 402                                         /*
 403                                          * rename attribute
 404                                          */
 405                                         renameatt(relname,      /* relname */
 406                                                           stmt->column,         /* old att name */
 407                                                           stmt->newname,        /* new att name */
 408                                                           interpretInhOption(stmt->inhOpt));            /* recursive? */
 409                                 }
 410                         }
 411                         break;
 412
 413                         /* various Alter Table forms */
 414
 415                 case T_AlterTableStmt:
 416                         {
 417                                 AlterTableStmt *stmt = (AlterTableStmt *) parsetree;
 418
 419                                 set_ps_display(commandTag = "ALTER");
 420
 421                                 /*
 422                                  * Some or all of these functions are recursive to cover
 423                                  * inherited things, so permission checks are done there.
 424                                  */
 425                                 switch (stmt->subtype)
 426                                 {
 427                                         case 'A':       /* ADD COLUMN */
 428                                                 AlterTableAddColumn(stmt->relname,
 429                                                                                 interpretInhOption(stmt->inhOpt),
 430                                                                                         (ColumnDef *) stmt->def);
 431                                                 break;
 432                                         case 'T':       /* ALTER COLUMN DEFAULT */
 433                                                 AlterTableAlterColumnDefault(stmt->relname,
 434                                                                                 interpretInhOption(stmt->inhOpt),
 435                                                                                                          stmt->name,
 436                                                                                                          stmt->def);
 437                                                 break;
 438                                         case 'S':       /* ALTER COLUMN STATISTICS */
 439                                                 AlterTableAlterColumnStatistics(stmt->relname,
 440                                                                                 interpretInhOption(stmt->inhOpt),
 441                                                                                                                 stmt->name,
 442                                                                                                                 stmt->def);
 443                                                 break;
 444                                         case 'D':       /* DROP COLUMN */
 445                                                 AlterTableDropColumn(stmt->relname,
 446                                                                                 interpretInhOption(stmt->inhOpt),
 447                                                                                          stmt->name,
 448                                                                                          stmt->behavior);
 449                                                 break;
 450                                         case 'C':       /* ADD CONSTRAINT */
 451                                                 AlterTableAddConstraint(stmt->relname,
 452                                                                                 interpretInhOption(stmt->inhOpt),
 453                                                                                                 stmt->def);
 454                                                 break;
 455                                         case 'X':       /* DROP CONSTRAINT */
 456                                                 AlterTableDropConstraint(stmt->relname,
 457                                                                                 interpretInhOption(stmt->inhOpt),
 458                                                                                                  stmt->name,
 459                                                                                                  stmt->behavior);
 460                                                 break;
 461                                         case 'E':       /* CREATE TOAST TABLE */
 462                                                 AlterTableCreateToastTable(stmt->relname,
 463                                                                                                    false);
 464                                                 break;
 465                                         case 'U':       /* ALTER OWNER */
 466                                                 AlterTableOwner(stmt->relname,
 467                                                                                 stmt->name);
 468                                                 break;
 469                                         default:        /* oops */
 470                                                 elog(ERROR, "T_AlterTableStmt: unknown subtype");
 471                                                 break;
 472                                 }
 473                         }
 474                         break;
 475
 476
 477                 case T_GrantStmt:
 478                         {
 479                                 GrantStmt *stmt = (GrantStmt *) parsetree;
 480                                 commandTag = stmt->is_grant ? "GRANT" : "REVOKE";
 481                                 set_ps_display(commandTag);
 482
 483                                 ExecuteGrantStmt(stmt);
 484                         }
 485                         break;
 486
 487                         /*
 488                          * ******************************** object creation /
 489                          * destruction ********************************
 490                          *
 491                          */
 492                 case T_DefineStmt:
 493                         {
 494                                 DefineStmt *stmt = (DefineStmt *) parsetree;
 495
 496                                 set_ps_display(commandTag = "CREATE");
 497
 498                                 switch (stmt->defType)
 499                                 {
 500                                         case OPERATOR:
 501                                                 DefineOperator(stmt->defname,   /* operator name */
 502                                                                            stmt->definition);           /* rest */
 503                                                 break;
 504                                         case TYPE_P:
 505                                                 DefineType(stmt->defname, stmt->definition);
 506                                                 break;
 507                                         case AGGREGATE:
 508                                                 DefineAggregate(stmt->defname,  /* aggregate name */
 509                                                                                 stmt->definition);              /* rest */
 510                                                 break;
 511                                 }
 512                         }
 513                         break;
 514
 515                 case T_ViewStmt:                /* CREATE VIEW */
 516                         {
 517                                 ViewStmt   *stmt = (ViewStmt *) parsetree;
 518
 519                                 set_ps_display(commandTag = "CREATE");
 520
 521                                 DefineView(stmt->viewname, stmt->query);                /* retrieve parsetree */
 522                         }
 523                         break;
 524
 525                 case T_ProcedureStmt:   /* CREATE FUNCTION */
 526                         set_ps_display(commandTag = "CREATE");
 527
 528                         CreateFunction((ProcedureStmt *) parsetree);
 529                         break;
 530
 531                 case T_IndexStmt:               /* CREATE INDEX */
 532                         {
 533                                 IndexStmt  *stmt = (IndexStmt *) parsetree;
 534
 535                                 set_ps_display(commandTag = "CREATE");
 536
 537                                 DefineIndex(stmt->relname,              /* relation name */
 538                                                         stmt->idxname,          /* index name */
 539                                                         stmt->accessMethod, /* am name */
 540                                                         stmt->indexParams,      /* parameters */
 541                                                         stmt->unique,
 542                                                         stmt->primary,
 543                                                         (Expr *) stmt->whereClause,
 544                                                         stmt->rangetable);
 545                         }
 546                         break;
 547
 548                 case T_RuleStmt:                /* CREATE RULE */
 549                         {
 550                                 RuleStmt   *stmt = (RuleStmt *) parsetree;
 551                                 int                     aclcheck_result;
 552
 553                                 relname = stmt->object->relname;
 554                                 aclcheck_result = pg_aclcheck(relname, GetUserId(), ACL_RULE);
 555                                 if (aclcheck_result != ACLCHECK_OK)
 556                                         elog(ERROR, "%s: %s", relname, aclcheck_error_strings[aclcheck_result]);
 557                                 set_ps_display(commandTag = "CREATE");
 558
 559                                 DefineQueryRewrite(stmt);
 560                         }
 561                         break;
 562
 563                 case T_CreateSeqStmt:
 564                         set_ps_display(commandTag = "CREATE");
 565
 566                         DefineSequence((CreateSeqStmt *) parsetree);
 567                         break;
 568
 569                 case T_RemoveAggrStmt:
 570                         {
 571                                 RemoveAggrStmt *stmt = (RemoveAggrStmt *) parsetree;
 572                                 char       *typename = (char *) NULL;
 573
 574                                 set_ps_display(commandTag = "DROP");
 575
 576                                 if (stmt->aggtype != NULL)
 577                                         typename = TypeNameToInternalName((TypeName *) stmt->aggtype);
 578
 579                                 RemoveAggregate(stmt->aggname, typename);
 580                         }
 581                         break;
 582
 583                 case T_RemoveFuncStmt:
 584                         {
 585                                 RemoveFuncStmt *stmt = (RemoveFuncStmt *) parsetree;
 586
 587                                 set_ps_display(commandTag = "DROP");
 588
 589                                 RemoveFunction(stmt->funcname, stmt->args);
 590                         }
 591                         break;
 592
 593                 case T_RemoveOperStmt:
 594                         {
 595                                 RemoveOperStmt *stmt = (RemoveOperStmt *) parsetree;
 596                                 TypeName   *typenode1 = (TypeName *) lfirst(stmt->args);
 597                                 TypeName   *typenode2 = (TypeName *) lsecond(stmt->args);
 598                                 char       *typename1 = (char *) NULL;
 599                                 char       *typename2 = (char *) NULL;
 600
 601                                 set_ps_display(commandTag = "DROP");
 602
 603                                 if (typenode1 != NULL)
 604                                         typename1 = TypeNameToInternalName(typenode1);
 605                                 if (typenode2 != NULL)
 606                                         typename2 = TypeNameToInternalName(typenode2);
 607
 608                                 RemoveOperator(stmt->opname, typename1, typename2);
 609                         }
 610                         break;
 611
 612                 case T_VersionStmt:
 613                         elog(ERROR, "CREATE VERSION is not currently implemented");
 614                         break;
 615
 616                 case T_CreatedbStmt:
 617                         {
 618                                 CreatedbStmt *stmt = (CreatedbStmt *) parsetree;
 619
 620                                 set_ps_display(commandTag = "CREATE DATABASE");
 621
 622                                 createdb(stmt->dbname, stmt->dbpath,
 623                                                  stmt->dbtemplate, stmt->encoding);
 624                         }
 625                         break;
 626
 627                 case T_DropdbStmt:
 628                         {
 629                                 DropdbStmt *stmt = (DropdbStmt *) parsetree;
 630
 631                                 set_ps_display(commandTag = "DROP DATABASE");
 632
 633                                 dropdb(stmt->dbname);
 634                         }
 635                         break;
 636
 637                         /* Query-level asynchronous notification */
 638                 case T_NotifyStmt:
 639                         {
 640                                 NotifyStmt *stmt = (NotifyStmt *) parsetree;
 641
 642                                 set_ps_display(commandTag = "NOTIFY");
 643
 644                                 Async_Notify(stmt->relname);
 645                         }
 646                         break;
 647
 648                 case T_ListenStmt:
 649                         {
 650                                 ListenStmt *stmt = (ListenStmt *) parsetree;
 651
 652                                 set_ps_display(commandTag = "LISTEN");
 653
 654                                 Async_Listen(stmt->relname, MyProcPid);
 655                         }
 656                         break;
 657
 658                 case T_UnlistenStmt:
 659                         {
 660                                 UnlistenStmt *stmt = (UnlistenStmt *) parsetree;
 661
 662                                 set_ps_display(commandTag = "UNLISTEN");
 663
 664                                 Async_Unlisten(stmt->relname, MyProcPid);
 665                         }
 666                         break;
 667
 668                         /*
 669                          * ******************************** dynamic loader ********************************
 670                          *
 671                          */
 672                 case T_LoadStmt:
 673                         {
 674                                 LoadStmt   *stmt = (LoadStmt *) parsetree;
 675
 676                                 set_ps_display(commandTag = "LOAD");
 677
 678                                 closeAllVfds(); /* probably not necessary... */
 679                                 load_file(stmt->filename);
 680                         }
 681                         break;
 682
 683                 case T_ClusterStmt:
 684                         {
 685                                 ClusterStmt *stmt = (ClusterStmt *) parsetree;
 686
 687                                 set_ps_display(commandTag = "CLUSTER");
 688
 689                                 relname = stmt->relname;
 690                                 if (IsSystemRelationName(relname))
 691                                         elog(ERROR, "CLUSTER: relation \"%s\" is a system catalog",
 692                                                  relname);
 693                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 694                                         elog(ERROR, "permission denied");
 695
 696                                 cluster(relname, stmt->indexname);
 697                         }
 698                         break;
 699
 700                 case T_VacuumStmt:
 701                         if (((VacuumStmt *) parsetree)->vacuum)
 702                                 commandTag = "VACUUM";
 703                         else
 704                                 commandTag = "ANALYZE";
 705                         set_ps_display(commandTag);
 706
 707                         vacuum((VacuumStmt *) parsetree);
 708                         break;
 709
 710                 case T_ExplainStmt:
 711                         {
 712                                 ExplainStmt *stmt = (ExplainStmt *) parsetree;
 713
 714                                 set_ps_display(commandTag = "EXPLAIN");
 715
 716                                 ExplainQuery(stmt->query, stmt->verbose, stmt->analyze, dest);
 717                         }
 718                         break;
 719
 720 #ifdef NOT_USED
 721
 722                         /*
 723                          * ******************************** Tioga-related statements *******************************
 724                          */
 725                 case T_RecipeStmt:
 726                         {
 727                                 RecipeStmt *stmt = (RecipeStmt *) parsetree;
 728
 729                                 set_ps_display(commandTag = "EXECUTE RECIPE");
 730
 731                                 beginRecipe(stmt);
 732                         }
 733                         break;
 734 #endif
 735
 736                         /*
 737                          * ******************************** set variable statements *******************************
 738                          */
 739                 case T_VariableSetStmt:
 740                         {
 741                                 VariableSetStmt *n = (VariableSetStmt *) parsetree;
 742
 743                                 SetPGVariable(n->name, n->value);
 744                                 set_ps_display(commandTag = "SET VARIABLE");
 745                         }
 746                         break;
 747
 748                 case T_VariableShowStmt:
 749                         {
 750                                 VariableShowStmt *n = (VariableShowStmt *) parsetree;
 751
 752                                 GetPGVariable(n->name);
 753                                 set_ps_display(commandTag = "SHOW VARIABLE");
 754                         }
 755                         break;
 756
 757                 case T_VariableResetStmt:
 758                         {
 759                                 VariableResetStmt *n = (VariableResetStmt *) parsetree;
 760
 761                                 ResetPGVariable(n->name);
 762                                 set_ps_display(commandTag = "RESET VARIABLE");
 763                         }
 764                         break;
 765
 766                         /*
 767                          * ******************************** TRIGGER statements *******************************
 768                          */
 769                 case T_CreateTrigStmt:
 770                         set_ps_display(commandTag = "CREATE");
 771
 772                         CreateTrigger((CreateTrigStmt *) parsetree);
 773                         break;
 774
 775                 case T_DropTrigStmt:
 776                         set_ps_display(commandTag = "DROP");
 777
 778                         DropTrigger((DropTrigStmt *) parsetree);
 779                         break;
 780
 781                         /*
 782                          * ************* PROCEDURAL LANGUAGE statements *****************
 783                          */
 784                 case T_CreatePLangStmt:
 785                         set_ps_display(commandTag = "CREATE");
 786
 787                         CreateProceduralLanguage((CreatePLangStmt *) parsetree);
 788                         break;
 789
 790                 case T_DropPLangStmt:
 791                         set_ps_display(commandTag = "DROP");
 792
 793                         DropProceduralLanguage((DropPLangStmt *) parsetree);
 794                         break;
 795
 796                         /*
 797                          * ******************************** USER statements ****
 798                          *
 799                          */
 800                 case T_CreateUserStmt:
 801                         set_ps_display(commandTag = "CREATE USER");
 802
 803                         CreateUser((CreateUserStmt *) parsetree);
 804                         break;
 805
 806                 case T_AlterUserStmt:
 807                         set_ps_display(commandTag = "ALTER USER");
 808
 809                         AlterUser((AlterUserStmt *) parsetree);
 810                         break;
 811
 812                 case T_DropUserStmt:
 813                         set_ps_display(commandTag = "DROP USER");
 814
 815                         DropUser((DropUserStmt *) parsetree);
 816                         break;
 817
 818                 case T_LockStmt:
 819                         set_ps_display(commandTag = "LOCK TABLE");
 820
 821                         LockTableCommand((LockStmt *) parsetree);
 822                         break;
 823
 824                 case T_ConstraintsSetStmt:
 825                         set_ps_display(commandTag = "SET CONSTRAINTS");
 826
 827                         DeferredTriggerSetState((ConstraintsSetStmt *) parsetree);
 828                         break;
 829
 830                 case T_CreateGroupStmt:
 831                         set_ps_display(commandTag = "CREATE GROUP");
 832
 833                         CreateGroup((CreateGroupStmt *) parsetree);
 834                         break;
 835
 836                 case T_AlterGroupStmt:
 837                         set_ps_display(commandTag = "ALTER GROUP");
 838
 839                         AlterGroup((AlterGroupStmt *) parsetree, "ALTER GROUP");
 840                         break;
 841
 842                 case T_DropGroupStmt:
 843                         set_ps_display(commandTag = "DROP GROUP");
 844
 845                         DropGroup((DropGroupStmt *) parsetree);
 846                         break;
 847
 848                 case T_CheckPointStmt:
 849                         {
 850                                 set_ps_display(commandTag = "CHECKPOINT");
 851
 852                                 if (!superuser())
 853                                         elog(ERROR, "permission denied");
 854                                 CreateCheckPoint(false);
 855                         }
 856                         break;
 857
 858                 case T_ReindexStmt:
 859                         {
 860                                 ReindexStmt *stmt = (ReindexStmt *) parsetree;
 861
 862                                 set_ps_display(commandTag = "REINDEX");
 863
 864                                 switch (stmt->reindexType)
 865                                 {
 866                                         case INDEX:
 867                                                 relname = (char *) stmt->name;
 868                                                 if (IsSystemRelationName(relname))
 869                                                 {
 870                                                         if (!allowSystemTableMods && IsSystemRelationName(relname))
 871                                                                 elog(ERROR, "\"%s\" is a system index. call REINDEX under standalone postgres with -O -P options",
 872                                                                          relname);
 873                                                         if (!IsIgnoringSystemIndexes())
 874                                                                 elog(ERROR, "\"%s\" is a system index. call REINDEX under standalone postgres with -P -O options",
 875                                                                          relname);
 876                                                 }
 877                                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 878                                                         elog(ERROR, "%s: %s", relname, aclcheck_error_strings[ACLCHECK_NOT_OWNER]);
 879                                                 ReindexIndex(relname, stmt->force);
 880                                                 break;
 881                                         case TABLE:
 882                                                 relname = (char *) stmt->name;
 883                                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 884                                                         elog(ERROR, "%s: %s", relname, aclcheck_error_strings[ACLCHECK_NOT_OWNER]);
 885                                                 ReindexTable(relname, stmt->force);
 886                                                 break;
 887                                         case DATABASE:
 888                                                 relname = (char *) stmt->name;
 889                                                 if (!allowSystemTableMods)
 890                                                         elog(ERROR, "must be called under standalone postgres with -O -P options");
 891                                                 if (!IsIgnoringSystemIndexes())
 892                                                         elog(ERROR, "must be called under standalone postgres with -P -O options");
 893                                                 ReindexDatabase(relname, stmt->force, false);
 894                                                 break;
 895                                 }
 896                                 break;
 897                         }
 898                         break;
 899
 900                         /*
 901                          * ******************************** default ********************************
 902                          *
 903                          */
 904                 default:
 905                         elog(ERROR, "ProcessUtility: command #%d unsupported",
 906                                  nodeTag(parsetree));
 907                         break;
 908         }
 909
 910         /*
 911          * tell fe/be or whatever that we're done.
 912          */
 913         EndCommand(commandTag, dest);
 914 }