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) 1996-2000, PostgreSQL, Inc
   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 1.101 2000/11/08 16:31:06 tgl Exp $
  14  *
  15  *-------------------------------------------------------------------------
  16  */
  17 #include "postgres.h"
  18
  19 #include "access/heapam.h"
  20 #include "catalog/catalog.h"
  21 #include "commands/async.h"
  22 #include "commands/cluster.h"
  23 #include "commands/command.h"
  24 #include "commands/comment.h"
  25 #include "commands/copy.h"
  26 #include "commands/creatinh.h"
  27 #include "commands/dbcommands.h"
  28 #include "commands/defrem.h"
  29 #include "commands/explain.h"
  30 #include "commands/proclang.h"
  31 #include "commands/rename.h"
  32 #include "commands/sequence.h"
  33 #include "commands/trigger.h"
  34 #include "commands/user.h"
  35 #include "commands/vacuum.h"
  36 #include "commands/variable.h"
  37 #include "commands/view.h"
  38 #include "miscadmin.h"
  39 #include "parser/parse.h"
  40 #include "parser/parse_expr.h"
  41 #include "rewrite/rewriteDefine.h"
  42 #include "rewrite/rewriteRemove.h"
  43 #include "tcop/utility.h"
  44 #include "utils/acl.h"
  45 #include "utils/ps_status.h"
  46 #include "utils/syscache.h"
  47 #include "access/xlog.h"
  48
  49 /*
  50  * Error-checking support for DROP commands
  51  */
  52
  53 struct kindstrings {
  54         char kind;
  55         char *indef_article;
  56         char *name;
  57         char *command;
  58 };
  59
  60 static struct kindstrings kindstringarray[] = {
  61         { RELKIND_RELATION, "a", "table", "TABLE" },
  62         { RELKIND_SEQUENCE, "a", "sequence", "SEQUENCE" },
  63         { RELKIND_VIEW, "a", "view", "VIEW" },
  64         { RELKIND_INDEX, "an", "index", "INDEX" },
  65         { '\0', "a", "???", "???" }
  66 };
  67
  68
  69 static void
  70 DropErrorMsg(char* relname, char wrongkind, char rightkind)
  71 {
  72         struct kindstrings *rentry;
  73         struct kindstrings *wentry;
  74
  75         for (rentry = kindstringarray; rentry->kind != '\0'; rentry++)
  76                 if (rentry->kind == rightkind)
  77                         break;
  78         Assert(rentry->kind != '\0');
  79
  80         for (wentry = kindstringarray; wentry->kind != '\0'; wentry++)
  81                 if (wentry->kind == wrongkind)
  82                         break;
  83         /* wrongkind could be something we don't have in our table... */
  84         if (wentry->kind != '\0')
  85                 elog(ERROR, "\"%s\" is not %s %s. Use DROP %s to remove %s %s",
  86                          relname, rentry->indef_article, rentry->name,
  87                          wentry->command, wentry->indef_article, wentry->name);
  88         else
  89                 elog(ERROR, "\"%s\" is not %s %s",
  90                          relname, rentry->indef_article, rentry->name);
  91 }
  92
  93 static void
  94 CheckDropPermissions(char *name, char rightkind)
  95 {
  96         struct kindstrings *rentry;
  97         HeapTuple       tuple;
  98         Form_pg_class classform;
  99
 100         for (rentry = kindstringarray; rentry->kind != '\0'; rentry++)
 101                 if (rentry->kind == rightkind)
 102                         break;
 103         Assert(rentry->kind != '\0');
 104
 105         tuple = SearchSysCacheTuple(RELNAME,
 106                                                                 PointerGetDatum(name),
 107                                                                 0, 0, 0);
 108         if (!HeapTupleIsValid(tuple))
 109                 elog(ERROR, "%s \"%s\" does not exist", rentry->name, name);
 110
 111         classform = (Form_pg_class) GETSTRUCT(tuple);
 112
 113         if (classform->relkind != rightkind)
 114                 DropErrorMsg(name, classform->relkind, rightkind);
 115
 116         if (!pg_ownercheck(GetUserId(), name, RELNAME))
 117                 elog(ERROR, "you do not own %s \"%s\"",
 118                          rentry->name, name);
 119
 120         if (!allowSystemTableMods && IsSystemRelationName(name))
 121                 elog(ERROR, "%s \"%s\" is a system %s",
 122                          rentry->name, name, rentry->name);
 123 }
 124
 125
 126 /* ----------------
 127  *              general utility function invoker
 128  * ----------------
 129  */
 130 void
 131 ProcessUtility(Node *parsetree,
 132                            CommandDest dest)
 133 {
 134         char       *commandTag = NULL;
 135         char       *relname;
 136         char       *relationName;
 137
 138         switch (nodeTag(parsetree))
 139         {
 140
 141                         /*
 142                          * ******************************** transactions ********************************
 143                          *
 144                          */
 145                 case T_TransactionStmt:
 146                         {
 147                                 TransactionStmt *stmt = (TransactionStmt *) parsetree;
 148
 149                                 switch (stmt->command)
 150                                 {
 151                                         case BEGIN_TRANS:
 152                                                 set_ps_display(commandTag = "BEGIN");
 153                                                 BeginTransactionBlock();
 154                                                 break;
 155
 156                                         case COMMIT:
 157                                                 set_ps_display(commandTag = "COMMIT");
 158                                                 EndTransactionBlock();
 159                                                 break;
 160
 161                                         case ROLLBACK:
 162                                                 set_ps_display(commandTag = "ROLLBACK");
 163                                                 UserAbortTransactionBlock();
 164                                                 break;
 165                                 }
 166                         }
 167                         break;
 168
 169                         /*
 170                          * ******************************** portal manipulation ********************************
 171                          *
 172                          */
 173                 case T_ClosePortalStmt:
 174                         {
 175                                 ClosePortalStmt *stmt = (ClosePortalStmt *) parsetree;
 176
 177                                 set_ps_display(commandTag = "CLOSE");
 178
 179                                 PerformPortalClose(stmt->portalname, dest);
 180                         }
 181                         break;
 182
 183                 case T_FetchStmt:
 184                         {
 185                                 FetchStmt  *stmt = (FetchStmt *) parsetree;
 186                                 char       *portalName = stmt->portalname;
 187                                 bool            forward;
 188                                 int                     count;
 189
 190                                 set_ps_display(commandTag = (stmt->ismove) ? "MOVE" : "FETCH");
 191
 192                                 SetQuerySnapshot();
 193
 194                                 forward = (bool) (stmt->direction == FORWARD);
 195
 196                                 /*
 197                                  * parser ensures that count is >= 0 and 'fetch ALL' -> 0
 198                                  */
 199
 200                                 count = stmt->howMany;
 201                                 PerformPortalFetch(portalName, forward, count, commandTag,
 202                                                                    (stmt->ismove) ? None : dest);               /* /dev/null for MOVE */
 203                         }
 204                         break;
 205
 206                         /*
 207                          * ******************************** relation and attribute
 208                          * manipulation ********************************
 209                          *
 210                          */
 211                 case T_CreateStmt:
 212                         set_ps_display(commandTag = "CREATE");
 213
 214                         DefineRelation((CreateStmt *) parsetree, RELKIND_RELATION);
 215
 216                         /*
 217                          * Let AlterTableCreateToastTable decide if this
 218                          * one needs a secondary relation too.
 219                          */
 220                         CommandCounterIncrement();
 221                         AlterTableCreateToastTable(((CreateStmt *)parsetree)->relname,
 222                                                                                 true);
 223                         break;
 224
 225                 case T_DropStmt:
 226                         {
 227                                 DropStmt   *stmt = (DropStmt *) parsetree;
 228                                 List       *args = stmt->names;
 229                                 List       *arg;
 230
 231                                 set_ps_display(commandTag = "DROP");
 232
 233                                 foreach(arg, args)
 234                                 {
 235                                         relname = strVal(lfirst(arg));
 236
 237                                         switch(stmt->removeType)
 238                                         {
 239                                                 case DROP_TABLE:
 240                                                         CheckDropPermissions(relname, RELKIND_RELATION);
 241                                                         RemoveRelation(relname);
 242                                                         break;
 243
 244                                                 case DROP_SEQUENCE:
 245                                                         CheckDropPermissions(relname, RELKIND_SEQUENCE);
 246                                                         RemoveRelation(relname);
 247                                                         break;
 248
 249                                                 case DROP_VIEW:
 250                                                         CheckDropPermissions(relname, RELKIND_VIEW);
 251                                                         RemoveView(relname);
 252                                                         break;
 253
 254                                                 case DROP_INDEX:
 255                                                         CheckDropPermissions(relname, RELKIND_INDEX);
 256                                                         RemoveIndex(relname);
 257                                                         break;
 258
 259                                                 case DROP_RULE:
 260                                                         {
 261                                                                 char       *rulename = relname;
 262                                                                 int                     aclcheck_result;
 263
 264                                                                 relationName = RewriteGetRuleEventRel(rulename);
 265                                                                 aclcheck_result = pg_aclcheck(relationName, GetUserId(), ACL_RU);
 266                                                                 if (aclcheck_result != ACLCHECK_OK)
 267                                                                         elog(ERROR, "%s: %s", relationName,
 268                                                                                         aclcheck_error_strings[aclcheck_result]);
 269                                                                 RemoveRewriteRule(rulename);
 270                                                         }
 271                                                         break;
 272
 273                                                 case DROP_TYPE_P:
 274                                                         /* RemoveType does its own permissions checks */
 275                                                         RemoveType(relname);
 276                                                         break;
 277                                         }
 278
 279                                         /*
 280                                          * Make sure subsequent loop iterations will see results
 281                                          * of this one; needed if removing multiple rules for
 282                                          * same table, for example.
 283                                          */
 284                                         CommandCounterIncrement();
 285                                 }
 286                         }
 287                         break;
 288
 289                 case T_TruncateStmt:
 290                         {
 291                                 Relation        rel;
 292
 293                                 set_ps_display(commandTag = "TRUNCATE");
 294
 295                                 relname = ((TruncateStmt *) parsetree)->relName;
 296                                 if (!allowSystemTableMods && IsSystemRelationName(relname))
 297                                         elog(ERROR, "TRUNCATE cannot be used on system tables. '%s' is a system table",
 298                                                  relname);
 299
 300                                 /* Grab exclusive lock in preparation for truncate... */
 301                                 rel = heap_openr(relname, AccessExclusiveLock);
 302                                 if (rel->rd_rel->relkind == RELKIND_SEQUENCE)
 303                                         elog(ERROR, "TRUNCATE cannot be used on sequences. '%s' is a sequence",
 304                                                  relname);
 305                                 if (rel->rd_rel->relkind == RELKIND_VIEW)
 306                                         elog(ERROR, "TRUNCATE cannot be used on views. '%s' is a sequence",
 307                                                  relname);
 308                                 heap_close(rel, NoLock);
 309
 310                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 311                                         elog(ERROR, "you do not own class \"%s\"", relname);
 312                                 TruncateRelation(relname);
 313                         }
 314                         break;
 315
 316                 case T_CommentStmt:
 317                         {
 318                                 CommentStmt *statement;
 319
 320                                 statement = ((CommentStmt *) parsetree);
 321
 322                                 set_ps_display(commandTag = "COMMENT");
 323
 324                                 CommentObject(statement->objtype, statement->objname,
 325                                                           statement->objproperty, statement->objlist,
 326                                                           statement->comment);
 327                         }
 328                         break;
 329
 330                 case T_CopyStmt:
 331                         {
 332                                 CopyStmt   *stmt = (CopyStmt *) parsetree;
 333
 334                                 set_ps_display(commandTag = "COPY");
 335
 336                                 if (stmt->direction != FROM)
 337                                         SetQuerySnapshot();
 338
 339                                 DoCopy(stmt->relname,
 340                                            stmt->binary,
 341                                            stmt->oids,
 342                                            (bool) (stmt->direction == FROM),
 343                                            (bool) (stmt->filename == NULL),
 344
 345                                 /*
 346                                  * null filename means copy to/from stdout/stdin, rather
 347                                  * than to/from a file.
 348                                  */
 349                                            stmt->filename,
 350                                            stmt->delimiter,
 351                                            stmt->null_print);
 352                         }
 353                         break;
 354
 355                         /*
 356                          * schema
 357                          */
 358                 case T_RenameStmt:
 359                         {
 360                                 RenameStmt *stmt = (RenameStmt *) parsetree;
 361
 362                                 set_ps_display(commandTag = "ALTER");
 363
 364                                 relname = stmt->relname;
 365                                 if (!allowSystemTableMods && IsSystemRelationName(relname))
 366                                         elog(ERROR, "ALTER TABLE: relation \"%s\" is a system catalog",
 367                                                  relname);
 368                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 369                                         elog(ERROR, "permission denied");
 370
 371                                 /* ----------------
 372                                  *      XXX using len == 3 to tell the difference
 373                                  *              between "rename rel to newrel" and
 374                                  *              "rename att in rel to newatt" will not
 375                                  *              work soon because "rename type/operator/rule"
 376                                  *              stuff is being added. - cim 10/24/90
 377                                  * ----------------
 378                                  * [another piece of amuzing but useless anecdote -- ay]
 379                                  */
 380                                 if (stmt->column == NULL)
 381                                 {
 382                                         /* ----------------
 383                                          *              rename relation
 384                                          *
 385                                          *              Note: we also rename the "type" tuple
 386                                          *              corresponding to the relation.
 387                                          * ----------------
 388                                          */
 389                                         renamerel(relname,      /* old name */
 390                                                           stmt->newname);       /* new name */
 391                                 }
 392                                 else
 393                                 {
 394                                         /* ----------------
 395                                          *              rename attribute
 396                                          * ----------------
 397                                          */
 398                                         renameatt(relname,      /* relname */
 399                                                           stmt->column,         /* old att name */
 400                                                           stmt->newname,        /* new att name */
 401                                                           stmt->inh);           /* recursive? */
 402                                 }
 403                         }
 404                         break;
 405
 406                         /* various Alter Table forms */
 407
 408                 case T_AlterTableStmt:
 409                         {
 410                                 AlterTableStmt *stmt = (AlterTableStmt *) parsetree;
 411
 412                                 set_ps_display(commandTag = "ALTER");
 413
 414                                 /*
 415                                  * Some or all of these functions are recursive to cover
 416                                  * inherited things, so permission checks are done there.
 417                                  */
 418                                 switch (stmt->subtype)
 419                                 {
 420                                         case 'A':       /* ADD COLUMN */
 421                                                 AlterTableAddColumn(stmt->relname, stmt->inh, (ColumnDef *) stmt->def);
 422                                                 break;
 423                                         case 'T':       /* ALTER COLUMN */
 424                                                 AlterTableAlterColumn(stmt->relname, stmt->inh, stmt->name, stmt->def);
 425                                                 break;
 426                                         case 'D':       /* ALTER DROP */
 427                                                 AlterTableDropColumn(stmt->relname, stmt->inh, stmt->name, stmt->behavior);
 428                                                 break;
 429                                         case 'C':       /* ADD CONSTRAINT */
 430                                                 AlterTableAddConstraint(stmt->relname, stmt->inh, stmt->def);
 431                                                 break;
 432                                         case 'X':       /* DROP CONSTRAINT */
 433                                                 AlterTableDropConstraint(stmt->relname, stmt->inh, stmt->name, stmt->behavior);
 434                                                 break;
 435                                         case 'E':       /* CREATE TOAST TABLE */
 436                                                 AlterTableCreateToastTable(stmt->relname, false);
 437                                                 break;
 438                                         case 'U':       /* ALTER OWNER */
 439                                                 AlterTableOwner(stmt->relname, stmt->name);
 440                                                 break;
 441                                         default:        /* oops */
 442                                                 elog(ERROR, "T_AlterTableStmt: unknown subtype");
 443                                                 break;
 444                                 }
 445                         }
 446                         break;
 447
 448
 449                 case T_ChangeACLStmt:
 450                         {
 451                                 ChangeACLStmt *stmt = (ChangeACLStmt *) parsetree;
 452
 453                                 set_ps_display(commandTag = "CHANGE");
 454
 455                                 ExecuteChangeACLStmt(stmt);
 456                         }
 457                         break;
 458
 459                         /*
 460                          * ******************************** object creation /
 461                          * destruction ********************************
 462                          *
 463                          */
 464                 case T_DefineStmt:
 465                         {
 466                                 DefineStmt *stmt = (DefineStmt *) parsetree;
 467
 468                                 set_ps_display(commandTag = "CREATE");
 469
 470                                 switch (stmt->defType)
 471                                 {
 472                                         case OPERATOR:
 473                                                 DefineOperator(stmt->defname,   /* operator name */
 474                                                                            stmt->definition);           /* rest */
 475                                                 break;
 476                                         case TYPE_P:
 477                                                 DefineType(stmt->defname, stmt->definition);
 478                                                 break;
 479                                         case AGGREGATE:
 480                                                 DefineAggregate(stmt->defname,  /* aggregate name */
 481                                                                                 stmt->definition);              /* rest */
 482                                                 break;
 483                                 }
 484                         }
 485                         break;
 486
 487                 case T_ViewStmt:                /* CREATE VIEW */
 488                         {
 489                                 ViewStmt   *stmt = (ViewStmt *) parsetree;
 490
 491                                 set_ps_display(commandTag = "CREATE");
 492
 493                                 DefineView(stmt->viewname, stmt->query);                /* retrieve parsetree */
 494                         }
 495                         break;
 496
 497                 case T_ProcedureStmt:   /* CREATE FUNCTION */
 498                         set_ps_display(commandTag = "CREATE");
 499
 500                         CreateFunction((ProcedureStmt *) parsetree, dest);      /* everything */
 501                         break;
 502
 503                 case T_IndexStmt:               /* CREATE INDEX */
 504                         {
 505                                 IndexStmt  *stmt = (IndexStmt *) parsetree;
 506
 507                                 set_ps_display(commandTag = "CREATE");
 508
 509                                 DefineIndex(stmt->relname,              /* relation name */
 510                                                         stmt->idxname,          /* index name */
 511                                                         stmt->accessMethod, /* am name */
 512                                                         stmt->indexParams,      /* parameters */
 513                                                         stmt->withClause,
 514                                                         stmt->unique,
 515                                                         stmt->primary,
 516                                                         (Expr *) stmt->whereClause,
 517                                                         stmt->rangetable);
 518                         }
 519                         break;
 520
 521                 case T_RuleStmt:                /* CREATE RULE */
 522                         {
 523                                 RuleStmt   *stmt = (RuleStmt *) parsetree;
 524                                 int                     aclcheck_result;
 525
 526                                 relname = stmt->object->relname;
 527                                 aclcheck_result = pg_aclcheck(relname, GetUserId(), ACL_RU);
 528                                 if (aclcheck_result != ACLCHECK_OK)
 529                                         elog(ERROR, "%s: %s", relname, aclcheck_error_strings[aclcheck_result]);
 530                                 set_ps_display(commandTag = "CREATE");
 531
 532                                 DefineQueryRewrite(stmt);
 533                         }
 534                         break;
 535
 536                 case T_CreateSeqStmt:
 537                         set_ps_display(commandTag = "CREATE");
 538
 539                         DefineSequence((CreateSeqStmt *) parsetree);
 540                         break;
 541
 542                 case T_ExtendStmt:
 543                         {
 544                                 ExtendStmt *stmt = (ExtendStmt *) parsetree;
 545
 546                                 set_ps_display(commandTag = "EXTEND");
 547
 548                                 ExtendIndex(stmt->idxname,              /* index name */
 549                                                         (Expr *) stmt->whereClause, /* where */
 550                                                         stmt->rangetable);
 551                         }
 552                         break;
 553
 554                 case T_RemoveAggrStmt:
 555                         {
 556                                 RemoveAggrStmt *stmt = (RemoveAggrStmt *) parsetree;
 557                                 char       *typename = (char *) NULL;
 558
 559                                 set_ps_display(commandTag = "DROP");
 560
 561                                 if (stmt->aggtype != NULL)
 562                                         typename = TypeNameToInternalName((TypeName *) stmt->aggtype);
 563
 564                                 RemoveAggregate(stmt->aggname, typename);
 565                         }
 566                         break;
 567
 568                 case T_RemoveFuncStmt:
 569                         {
 570                                 RemoveFuncStmt *stmt = (RemoveFuncStmt *) parsetree;
 571
 572                                 set_ps_display(commandTag = "DROP");
 573
 574                                 RemoveFunction(stmt->funcname, stmt->args);
 575                         }
 576                         break;
 577
 578                 case T_RemoveOperStmt:
 579                         {
 580                                 RemoveOperStmt *stmt = (RemoveOperStmt *) parsetree;
 581                                 TypeName   *typenode1 = (TypeName *) lfirst(stmt->args);
 582                                 TypeName   *typenode2 = (TypeName *) lsecond(stmt->args);
 583                                 char       *typename1 = (char *) NULL;
 584                                 char       *typename2 = (char *) NULL;
 585
 586                                 set_ps_display(commandTag = "DROP");
 587
 588                                 if (typenode1 != NULL)
 589                                         typename1 = TypeNameToInternalName(typenode1);
 590                                 if (typenode2 != NULL)
 591                                         typename2 = TypeNameToInternalName(typenode2);
 592
 593                                 RemoveOperator(stmt->opname, typename1, typename2);
 594                         }
 595                         break;
 596
 597                 case T_VersionStmt:
 598                         elog(ERROR, "CREATE VERSION is not currently implemented");
 599                         break;
 600
 601                 case T_CreatedbStmt:
 602                         {
 603                                 CreatedbStmt *stmt = (CreatedbStmt *) parsetree;
 604
 605                                 set_ps_display(commandTag = "CREATE DATABASE");
 606
 607                                 createdb(stmt->dbname, stmt->dbpath, stmt->encoding);
 608                         }
 609                         break;
 610
 611                 case T_DropdbStmt:
 612                         {
 613                                 DropdbStmt *stmt = (DropdbStmt *) parsetree;
 614
 615                                 set_ps_display(commandTag = "DROP DATABASE");
 616
 617                                 dropdb(stmt->dbname);
 618                         }
 619                         break;
 620
 621                         /* Query-level asynchronous notification */
 622                 case T_NotifyStmt:
 623                         {
 624                                 NotifyStmt *stmt = (NotifyStmt *) parsetree;
 625
 626                                 set_ps_display(commandTag = "NOTIFY");
 627
 628                                 Async_Notify(stmt->relname);
 629                         }
 630                         break;
 631
 632                 case T_ListenStmt:
 633                         {
 634                                 ListenStmt *stmt = (ListenStmt *) parsetree;
 635
 636                                 set_ps_display(commandTag = "LISTEN");
 637
 638                                 Async_Listen(stmt->relname, MyProcPid);
 639                         }
 640                         break;
 641
 642                 case T_UnlistenStmt:
 643                         {
 644                                 UnlistenStmt *stmt = (UnlistenStmt *) parsetree;
 645
 646                                 set_ps_display(commandTag = "UNLISTEN");
 647
 648                                 Async_Unlisten(stmt->relname, MyProcPid);
 649                         }
 650                         break;
 651
 652                         /*
 653                          * ******************************** dynamic loader ********************************
 654                          *
 655                          */
 656                 case T_LoadStmt:
 657                         {
 658                                 LoadStmt   *stmt = (LoadStmt *) parsetree;
 659
 660                                 set_ps_display(commandTag = "LOAD");
 661
 662                                 closeAllVfds(); /* probably not necessary... */
 663                                 load_file(stmt->filename);
 664                         }
 665                         break;
 666
 667                 case T_ClusterStmt:
 668                         {
 669                                 ClusterStmt *stmt = (ClusterStmt *) parsetree;
 670
 671                                 set_ps_display(commandTag = "CLUSTER");
 672
 673                                 relname = stmt->relname;
 674                                 if (IsSystemRelationName(relname))
 675                                         elog(ERROR, "CLUSTER: relation \"%s\" is a system catalog",
 676                                                  relname);
 677                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 678                                         elog(ERROR, "permission denied");
 679
 680                                 cluster(relname, stmt->indexname);
 681                         }
 682                         break;
 683
 684                 case T_VacuumStmt:
 685                         set_ps_display(commandTag = "VACUUM");
 686
 687                         vacuum(((VacuumStmt *) parsetree)->vacrel,
 688                                    ((VacuumStmt *) parsetree)->verbose,
 689                                    ((VacuumStmt *) parsetree)->analyze,
 690                                    ((VacuumStmt *) parsetree)->va_spec);
 691                         break;
 692
 693                 case T_ExplainStmt:
 694                         {
 695                                 ExplainStmt *stmt = (ExplainStmt *) parsetree;
 696
 697                                 set_ps_display(commandTag = "EXPLAIN");
 698
 699                                 ExplainQuery(stmt->query, stmt->verbose, dest);
 700                         }
 701                         break;
 702
 703 #ifdef NOT_USED
 704
 705                         /*
 706                          * ******************************** Tioga-related statements *******************************
 707                          */
 708                 case T_RecipeStmt:
 709                         {
 710                                 RecipeStmt *stmt = (RecipeStmt *) parsetree;
 711
 712                                 set_ps_display(commandTag = "EXECUTE RECIPE");
 713
 714                                 beginRecipe(stmt);
 715                         }
 716                         break;
 717 #endif
 718
 719                         /*
 720                          * ******************************** set variable statements *******************************
 721                          */
 722                 case T_VariableSetStmt:
 723                         {
 724                                 VariableSetStmt *n = (VariableSetStmt *) parsetree;
 725
 726                                 SetPGVariable(n->name, n->value);
 727                                 set_ps_display(commandTag = "SET VARIABLE");
 728                         }
 729                         break;
 730
 731                 case T_VariableShowStmt:
 732                         {
 733                                 VariableShowStmt *n = (VariableShowStmt *) parsetree;
 734
 735                                 GetPGVariable(n->name);
 736                                 set_ps_display(commandTag = "SHOW VARIABLE");
 737                         }
 738                         break;
 739
 740                 case T_VariableResetStmt:
 741                         {
 742                                 VariableResetStmt *n = (VariableResetStmt *) parsetree;
 743
 744                                 ResetPGVariable(n->name);
 745                                 set_ps_display(commandTag = "RESET VARIABLE");
 746                         }
 747                         break;
 748
 749                         /*
 750                          * ******************************** TRIGGER statements *******************************
 751                          */
 752                 case T_CreateTrigStmt:
 753                         set_ps_display(commandTag = "CREATE");
 754
 755                         CreateTrigger((CreateTrigStmt *) parsetree);
 756                         break;
 757
 758                 case T_DropTrigStmt:
 759                         set_ps_display(commandTag = "DROP");
 760
 761                         DropTrigger((DropTrigStmt *) parsetree);
 762                         break;
 763
 764                         /*
 765                          * ************* PROCEDURAL LANGUAGE statements *****************
 766                          */
 767                 case T_CreatePLangStmt:
 768                         set_ps_display(commandTag = "CREATE");
 769
 770                         CreateProceduralLanguage((CreatePLangStmt *) parsetree);
 771                         break;
 772
 773                 case T_DropPLangStmt:
 774                         set_ps_display(commandTag = "DROP");
 775
 776                         DropProceduralLanguage((DropPLangStmt *) parsetree);
 777                         break;
 778
 779                         /*
 780                          * ******************************** USER statements ****
 781                          *
 782                          */
 783                 case T_CreateUserStmt:
 784                         set_ps_display(commandTag = "CREATE USER");
 785
 786                         CreateUser((CreateUserStmt *) parsetree);
 787                         break;
 788
 789                 case T_AlterUserStmt:
 790                         set_ps_display(commandTag = "ALTER USER");
 791
 792                         AlterUser((AlterUserStmt *) parsetree);
 793                         break;
 794
 795                 case T_DropUserStmt:
 796                         set_ps_display(commandTag = "DROP USER");
 797
 798                         DropUser((DropUserStmt *) parsetree);
 799                         break;
 800
 801                 case T_LockStmt:
 802                         set_ps_display(commandTag = "LOCK TABLE");
 803
 804                         LockTableCommand((LockStmt *) parsetree);
 805                         break;
 806
 807                 case T_ConstraintsSetStmt:
 808                         set_ps_display(commandTag = "SET CONSTRAINTS");
 809
 810                         DeferredTriggerSetState((ConstraintsSetStmt *) parsetree);
 811                         break;
 812
 813                 case T_CreateGroupStmt:
 814                         set_ps_display(commandTag = "CREATE GROUP");
 815
 816                         CreateGroup((CreateGroupStmt *) parsetree);
 817                         break;
 818
 819                 case T_AlterGroupStmt:
 820                         set_ps_display(commandTag = "ALTER GROUP");
 821
 822                         AlterGroup((AlterGroupStmt *) parsetree, "ALTER GROUP");
 823                         break;
 824
 825                 case T_DropGroupStmt:
 826                         set_ps_display(commandTag = "DROP GROUP");
 827
 828                         DropGroup((DropGroupStmt *) parsetree);
 829                         break;
 830
 831                 case T_CheckPointStmt:
 832                         {
 833                                 set_ps_display(commandTag = "CHECKPOINT");
 834
 835                                 CreateCheckPoint(false);
 836                         }
 837                         break;
 838
 839                 case T_ReindexStmt:
 840                         {
 841                                 ReindexStmt *stmt = (ReindexStmt *) parsetree;
 842
 843                                 set_ps_display(commandTag = "REINDEX");
 844
 845                                 switch (stmt->reindexType)
 846                                 {
 847                                         case INDEX:
 848                                                 relname = (char *) stmt->name;
 849                                                 if (IsSystemRelationName(relname))
 850                                                 {
 851                                                         if (!allowSystemTableMods && IsSystemRelationName(relname))
 852                                                                 elog(ERROR, "\"%s\" is a system index. call REINDEX under standalone postgres with -O -P options",
 853                                                                  relname);
 854                                                         if (!IsIgnoringSystemIndexes())
 855                                                                 elog(ERROR, "\"%s\" is a system index. call REINDEX under standalone postgres with -P -O options",
 856                                                                  relname);
 857                                                 }
 858                                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 859                                                         elog(ERROR, "%s: %s", relname, aclcheck_error_strings[ACLCHECK_NOT_OWNER]);
 860                                                 ReindexIndex(relname, stmt->force);
 861                                                 break;
 862                                         case TABLE:
 863                                                 relname = (char *) stmt->name;
 864                                                 if (IsSystemRelationName(relname))
 865                                                 {
 866                                                         if (!allowSystemTableMods && IsSystemRelationName(relname))
 867                                                                 elog(ERROR, "\"%s\" is a system table. call REINDEX under standalone postgres with -O -P options",
 868                                                                  relname);
 869                                                         if (!IsIgnoringSystemIndexes())
 870                                                                 elog(ERROR, "\"%s\" is a system table. call REINDEX under standalone postgres with -P -O options",
 871
 872                                                                  relname);
 873                                                 }
 874                                                 if (!pg_ownercheck(GetUserId(), relname, RELNAME))
 875                                                         elog(ERROR, "%s: %s", relname, aclcheck_error_strings[ACLCHECK_NOT_OWNER]);
 876                                                 ReindexTable(relname, stmt->force);
 877                                                 break;
 878                                         case DATABASE:
 879                                                 relname = (char *) stmt->name;
 880                                                 if (!allowSystemTableMods)
 881                                                         elog(ERROR, "must be called under standalone postgres with -O -P options");
 882                                                 if (!IsIgnoringSystemIndexes())
 883                                                         elog(ERROR, "must be called under standalone postgres with -P -O options");
 884                                                 ReindexDatabase(relname, stmt->force, false);
 885                                                 break;
 886                                 }
 887                                 break;
 888                         }
 889                         break;
 890
 891                         /*
 892                          * ******************************** default ********************************
 893                          *
 894                          */
 895                 default:
 896                         elog(ERROR, "ProcessUtility: command #%d unsupported",
 897                                  nodeTag(parsetree));
 898                         break;
 899         }
 900
 901         /* ----------------
 902          *      tell fe/be or whatever that we're done.
 903          * ----------------
 904          */
 905         EndCommand(commandTag, dest);
 906 }