granicus.if.org Git - postgresql/blob - 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  * Copyright (c) 1994, Regents of the University of California
   9  *
  10  *
  11  * IDENTIFICATION
  12  *        $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.78 2000/01/14 22:11:35 petere Exp $
  13  *
  14  *-------------------------------------------------------------------------
  15  */
  16 #include "postgres.h"
  17
  18 #include "access/heapam.h"
  19 #include "catalog/catalog.h"
  20 #include "catalog/pg_type.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 "rewrite/rewriteDefine.h"
  41 #include "rewrite/rewriteRemove.h"
  42 #include "tcop/utility.h"
  43 #include "utils/acl.h"
  44 #include "utils/ps_status.h"
  45 #include "utils/syscache.h"
  46
  47
  48 /* ----------------
  49  *              CHECK_IF_ABORTED() is used to avoid doing unnecessary
  50  *              processing within an aborted transaction block.
  51  * ----------------
  52  */
  53  /* we have to use IF because of the 'break' */
  54 #define CHECK_IF_ABORTED() \
  55 if (1) \
  56 { \
  57         if (IsAbortedTransactionBlockState()) \
  58         { \
  59                 elog(NOTICE, "(transaction aborted): %s", \
  60                          "all queries ignored until end of transaction block"); \
  61                 commandTag = "*ABORT STATE*"; \
  62                 break; \
  63         } \
  64 } else
  65
  66 /* ----------------
  67  *              general utility function invoker
  68  * ----------------
  69  */
  70 void
  71 ProcessUtility(Node *parsetree,
  72                            CommandDest dest)
  73 {
  74         char       *commandTag = NULL;
  75         char       *relname;
  76         char       *relationName;
  77         char       *userName;
  78
  79         userName = GetPgUserName();
  80
  81         switch (nodeTag(parsetree))
  82         {
  83
  84                         /*
  85                          * ******************************** transactions ********************************
  86                          *
  87                          */
  88                 case T_TransactionStmt:
  89                         {
  90                                 TransactionStmt *stmt = (TransactionStmt *) parsetree;
  91
  92                                 switch (stmt->command)
  93                                 {
  94                                         case BEGIN_TRANS:
  95                                                 PS_SET_STATUS(commandTag = "BEGIN");
  96                                                 CHECK_IF_ABORTED();
  97                                                 BeginTransactionBlock();
  98                                                 break;
  99
 100                                         case END_TRANS:
 101                                                 PS_SET_STATUS(commandTag = "END");
 102                                                 EndTransactionBlock();
 103                                                 break;
 104
 105                                         case ABORT_TRANS:
 106                                                 PS_SET_STATUS(commandTag = "ABORT");
 107                                                 UserAbortTransactionBlock();
 108                                                 break;
 109                                 }
 110                         }
 111                         break;
 112
 113                         /*
 114                          * ******************************** portal manipulation ********************************
 115                          *
 116                          */
 117                 case T_ClosePortalStmt:
 118                         {
 119                                 ClosePortalStmt *stmt = (ClosePortalStmt *) parsetree;
 120
 121                                 PS_SET_STATUS(commandTag = "CLOSE");
 122                                 CHECK_IF_ABORTED();
 123
 124                                 PerformPortalClose(stmt->portalname, dest);
 125                         }
 126                         break;
 127
 128                 case T_FetchStmt:
 129                         {
 130                                 FetchStmt  *stmt = (FetchStmt *) parsetree;
 131                                 char       *portalName = stmt->portalname;
 132                                 bool            forward;
 133                                 int                     count;
 134
 135                                 PS_SET_STATUS(commandTag = (stmt->ismove) ? "MOVE" : "FETCH");
 136                                 CHECK_IF_ABORTED();
 137
 138                                 forward = (bool) (stmt->direction == FORWARD);
 139
 140                                 /*
 141                                  * parser ensures that count is >= 0 and 'fetch ALL' -> 0
 142                                  */
 143
 144                                 count = stmt->howMany;
 145                                 PerformPortalFetch(portalName, forward, count, commandTag,
 146                                                                    (stmt->ismove) ? None : dest);               /* /dev/null for MOVE */
 147                         }
 148                         break;
 149
 150                         /*
 151                          * ******************************** relation and attribute
 152                          * manipulation ********************************
 153                          *
 154                          */
 155                 case T_CreateStmt:
 156                         PS_SET_STATUS(commandTag = "CREATE");
 157                         CHECK_IF_ABORTED();
 158
 159                         DefineRelation((CreateStmt *) parsetree, RELKIND_RELATION);
 160                         break;
 161
 162                 case T_DropStmt:
 163                         {
 164                                 DropStmt *stmt = (DropStmt *) parsetree;
 165                                 List       *args = stmt->relNames;
 166                                 List       *arg;
 167
 168                                 PS_SET_STATUS(commandTag = "DROP");
 169                                 CHECK_IF_ABORTED();
 170
 171                                 /* check as much as we can before we start dropping ... */
 172                                 foreach(arg, args)
 173                                 {
 174                                         Relation        rel;
 175
 176                                         relname = strVal(lfirst(arg));
 177                                         if (!allowSystemTableMods && IsSystemRelationName(relname))
 178                                                 elog(ERROR, "class \"%s\" is a system catalog",
 179                                                          relname);
 180                                         rel = heap_openr(relname, AccessExclusiveLock);
 181                                         if (stmt->sequence &&
 182                                                 rel->rd_rel->relkind != RELKIND_SEQUENCE)
 183                                                 elog(ERROR, "Use DROP TABLE to drop table '%s'",
 184                                                          relname);
 185                                         if (!(stmt->sequence) &&
 186                                                 rel->rd_rel->relkind == RELKIND_SEQUENCE)
 187                                                 elog(ERROR, "Use DROP SEQUENCE to drop sequence '%s'",
 188                                                          relname);
 189                                         /* close rel, but keep lock until end of xact */
 190                                         heap_close(rel, NoLock);
 191 #ifndef NO_SECURITY
 192                                         if (!pg_ownercheck(userName, relname, RELNAME))
 193                                                 elog(ERROR, "you do not own class \"%s\"",
 194                                                          relname);
 195 #endif
 196                                 }
 197                                 /* OK, terminate 'em all */
 198                                 foreach(arg, args)
 199                                 {
 200                                         relname = strVal(lfirst(arg));
 201                                         RemoveRelation(relname);
 202                                 }
 203                         }
 204                         break;
 205
 206                 case T_TruncateStmt:
 207                         {
 208                                 Relation        rel;
 209
 210                                 PS_SET_STATUS(commandTag = "TRUNCATE");
 211                                 CHECK_IF_ABORTED();
 212
 213                                 relname = ((TruncateStmt *) parsetree)->relName;
 214                                 if (!allowSystemTableMods && IsSystemRelationName(relname))
 215                                         elog(ERROR, "TRUNCATE cannot be used on system tables. '%s' is a system table",
 216                                                  relname);
 217
 218                                 /* Grab exclusive lock in preparation for truncate... */
 219                                 rel = heap_openr(relname, AccessExclusiveLock);
 220                             if (rel->rd_rel->relkind == RELKIND_SEQUENCE)
 221                                         elog(ERROR, "TRUNCATE cannot be used on sequences. '%s' is a sequence",
 222                                                  relname);
 223                             heap_close(rel, NoLock);
 224
 225 #ifndef NO_SECURITY
 226                                 if (!pg_ownercheck(userName, relname, RELNAME))
 227                                         elog(ERROR, "you do not own class \"%s\"", relname);
 228 #endif
 229                                 TruncateRelation(relname);
 230                         }
 231                         break;
 232
 233         case T_CommentStmt:
 234           {
 235
 236             CommentStmt *statement;
 237
 238             statement = ((CommentStmt *) parsetree);
 239
 240             PS_SET_STATUS(commandTag = "COMMENT");
 241             CHECK_IF_ABORTED();
 242             CommentObject(statement->objtype, statement->objname,
 243                           statement->objproperty, statement->objlist,
 244                           statement->comment);
 245           }
 246           break;
 247
 248
 249
 250                 case T_CopyStmt:
 251                         {
 252                                 CopyStmt   *stmt = (CopyStmt *) parsetree;
 253
 254                                 PS_SET_STATUS(commandTag = "COPY");
 255                                 CHECK_IF_ABORTED();
 256
 257                                 DoCopy(stmt->relname,
 258                                            stmt->binary,
 259                                            stmt->oids,
 260                                            (bool) (stmt->direction == FROM),
 261                                            (bool) (stmt->filename == NULL),
 262
 263                                 /*
 264                                  * null filename means copy to/from stdout/stdin, rather
 265                                  * than to/from a file.
 266                                  */
 267                                            stmt->filename,
 268                                            stmt->delimiter,
 269                        stmt->null_print);
 270                         }
 271                         break;
 272
 273                 case T_AddAttrStmt:
 274                         {
 275                                 AddAttrStmt *stmt = (AddAttrStmt *) parsetree;
 276
 277                                 PS_SET_STATUS(commandTag = "ADD");
 278                                 CHECK_IF_ABORTED();
 279
 280                                 /*
 281                                  * owner checking done in PerformAddAttribute (now
 282                                  * recursive)
 283                                  */
 284                                 PerformAddAttribute(stmt->relname,
 285                                                                         userName,
 286                                                                         stmt->inh,
 287                                                                         (ColumnDef *) stmt->colDef);
 288                         }
 289                         break;
 290
 291                         /*
 292                          * schema
 293                          */
 294                 case T_RenameStmt:
 295                         {
 296                                 RenameStmt *stmt = (RenameStmt *) parsetree;
 297
 298                                 PS_SET_STATUS(commandTag = "RENAME");
 299                                 CHECK_IF_ABORTED();
 300
 301                                 relname = stmt->relname;
 302                                 if (!allowSystemTableMods && IsSystemRelationName(relname))
 303                                         elog(ERROR, "class \"%s\" is a system catalog",
 304                                                  relname);
 305 #ifndef NO_SECURITY
 306                                 if (!pg_ownercheck(userName, relname, RELNAME))
 307                                         elog(ERROR, "you do not own class \"%s\"",
 308                                                  relname);
 309 #endif
 310
 311                                 /* ----------------
 312                                  *      XXX using len == 3 to tell the difference
 313                                  *              between "rename rel to newrel" and
 314                                  *              "rename att in rel to newatt" will not
 315                                  *              work soon because "rename type/operator/rule"
 316                                  *              stuff is being added. - cim 10/24/90
 317                                  * ----------------
 318                                  * [another piece of amuzing but useless anecdote -- ay]
 319                                  */
 320                                 if (stmt->column == NULL)
 321                                 {
 322                                         /* ----------------
 323                                          *              rename relation
 324                                          *
 325                                          *              Note: we also rename the "type" tuple
 326                                          *              corresponding to the relation.
 327                                          * ----------------
 328                                          */
 329                                         renamerel(relname,      /* old name */
 330                                                           stmt->newname);       /* new name */
 331                                         TypeRename(relname, /* old name */
 332                                                            stmt->newname);      /* new name */
 333                                 }
 334                                 else
 335                                 {
 336                                         /* ----------------
 337                                          *              rename attribute
 338                                          * ----------------
 339                                          */
 340                                         renameatt(relname,      /* relname */
 341                                                           stmt->column,         /* old att name */
 342                                                           stmt->newname,        /* new att name */
 343                                                           userName,
 344                                                           stmt->inh);           /* recursive? */
 345                                 }
 346                         }
 347                         break;
 348
 349                 case T_ChangeACLStmt:
 350                         {
 351                                 ChangeACLStmt *stmt = (ChangeACLStmt *) parsetree;
 352                                 List       *i;
 353                                 AclItem    *aip;
 354                                 unsigned        modechg;
 355
 356                                 PS_SET_STATUS(commandTag = "CHANGE");
 357                                 CHECK_IF_ABORTED();
 358
 359                                 aip = stmt->aclitem;
 360
 361                                 modechg = stmt->modechg;
 362 #ifndef NO_SECURITY
 363                                 foreach(i, stmt->relNames)
 364                                 {
 365                                         relname = strVal(lfirst(i));
 366                                         if (!pg_ownercheck(userName, relname, RELNAME))
 367                                                 elog(ERROR, "you do not own class \"%s\"",
 368                                                          relname);
 369                                 }
 370 #endif
 371                                 foreach(i, stmt->relNames)
 372                                 {
 373                                         relname = strVal(lfirst(i));
 374                                         ChangeAcl(relname, aip, modechg);
 375                                 }
 376
 377                         }
 378                         break;
 379
 380                         /*
 381                          * ******************************** object creation /
 382                          * destruction ********************************
 383                          *
 384                          */
 385                 case T_DefineStmt:
 386                         {
 387                                 DefineStmt *stmt = (DefineStmt *) parsetree;
 388
 389                                 PS_SET_STATUS(commandTag = "CREATE");
 390                                 CHECK_IF_ABORTED();
 391
 392                                 switch (stmt->defType)
 393                                 {
 394                                         case OPERATOR:
 395                                                 DefineOperator(stmt->defname,   /* operator name */
 396                                                                            stmt->definition);           /* rest */
 397                                                 break;
 398                                         case TYPE_P:
 399                                                 DefineType(stmt->defname, stmt->definition);
 400                                                 break;
 401                                         case AGGREGATE:
 402                                                 DefineAggregate(stmt->defname,  /* aggregate name */
 403                                                                                 stmt->definition);              /* rest */
 404                                                 break;
 405                                 }
 406                         }
 407                         break;
 408
 409                 case T_ViewStmt:                /* CREATE VIEW */
 410                         {
 411                                 ViewStmt   *stmt = (ViewStmt *) parsetree;
 412
 413                                 PS_SET_STATUS(commandTag = "CREATE");
 414                                 CHECK_IF_ABORTED();
 415                                 DefineView(stmt->viewname, stmt->query);                /* retrieve parsetree */
 416                         }
 417                         break;
 418
 419                 case T_ProcedureStmt:   /* CREATE FUNCTION */
 420                         PS_SET_STATUS(commandTag = "CREATE");
 421                         CHECK_IF_ABORTED();
 422                         CreateFunction((ProcedureStmt *) parsetree, dest);      /* everything */
 423                         break;
 424
 425                 case T_IndexStmt:               /* CREATE INDEX */
 426                         {
 427                                 IndexStmt  *stmt = (IndexStmt *) parsetree;
 428
 429                                 PS_SET_STATUS(commandTag = "CREATE");
 430                                 CHECK_IF_ABORTED();
 431                                 DefineIndex(stmt->relname,              /* relation name */
 432                                                         stmt->idxname,          /* index name */
 433                                                         stmt->accessMethod, /* am name */
 434                                                         stmt->indexParams,      /* parameters */
 435                                                         stmt->withClause,
 436                                                         stmt->unique,
 437                                                         stmt->primary,
 438                                                         (Expr *) stmt->whereClause,
 439                                                         stmt->rangetable);
 440                         }
 441                         break;
 442
 443                 case T_RuleStmt:                /* CREATE RULE */
 444                         {
 445                                 RuleStmt   *stmt = (RuleStmt *) parsetree;
 446                                 int                     aclcheck_result;
 447
 448 #ifndef NO_SECURITY
 449                                 relname = stmt->object->relname;
 450                                 aclcheck_result = pg_aclcheck(relname, userName, ACL_RU);
 451                                 if (aclcheck_result != ACLCHECK_OK)
 452                                         elog(ERROR, "%s: %s", relname, aclcheck_error_strings[aclcheck_result]);
 453 #endif
 454                                 PS_SET_STATUS(commandTag = "CREATE");
 455                                 CHECK_IF_ABORTED();
 456                                 DefineQueryRewrite(stmt);
 457                         }
 458                         break;
 459
 460                 case T_CreateSeqStmt:
 461                         PS_SET_STATUS(commandTag = "CREATE");
 462                         CHECK_IF_ABORTED();
 463
 464                         DefineSequence((CreateSeqStmt *) parsetree);
 465                         break;
 466
 467                 case T_ExtendStmt:
 468                         {
 469                                 ExtendStmt *stmt = (ExtendStmt *) parsetree;
 470
 471                                 PS_SET_STATUS(commandTag = "EXTEND");
 472                                 CHECK_IF_ABORTED();
 473
 474                                 ExtendIndex(stmt->idxname,              /* index name */
 475                                                         (Expr *) stmt->whereClause, /* where */
 476                                                         stmt->rangetable);
 477                         }
 478                         break;
 479
 480                 case T_RemoveStmt:
 481                         {
 482                                 RemoveStmt *stmt = (RemoveStmt *) parsetree;
 483
 484                                 PS_SET_STATUS(commandTag = "DROP");
 485                                 CHECK_IF_ABORTED();
 486
 487                                 switch (stmt->removeType)
 488                                 {
 489                                         case INDEX:
 490                                                 relname = stmt->name;
 491                                                 if (!allowSystemTableMods && IsSystemRelationName(relname))
 492                                                         elog(ERROR, "class \"%s\" is a system catalog index",
 493                                                                  relname);
 494 #ifndef NO_SECURITY
 495                                                 if (!pg_ownercheck(userName, relname, RELNAME))
 496                                                         elog(ERROR, "%s: %s", relname, aclcheck_error_strings[ACLCHECK_NOT_OWNER]);
 497 #endif
 498                                                 RemoveIndex(relname);
 499                                                 break;
 500                                         case RULE:
 501                                                 {
 502                                                         char       *rulename = stmt->name;
 503                                                         int                     aclcheck_result;
 504
 505 #ifndef NO_SECURITY
 506
 507                                                         relationName = RewriteGetRuleEventRel(rulename);
 508                                                         aclcheck_result = pg_aclcheck(relationName, userName, ACL_RU);
 509                                                         if (aclcheck_result != ACLCHECK_OK)
 510                                                                 elog(ERROR, "%s: %s", relationName, aclcheck_error_strings[aclcheck_result]);
 511 #endif
 512                                                         RemoveRewriteRule(rulename);
 513                                                 }
 514                                                 break;
 515                                         case TYPE_P:
 516 #ifndef NO_SECURITY
 517                                                 /* XXX moved to remove.c */
 518 #endif
 519                                                 RemoveType(stmt->name);
 520                                                 break;
 521                                         case VIEW:
 522                                                 {
 523                                                         char       *viewName = stmt->name;
 524                                                         char       *ruleName;
 525
 526 #ifndef NO_SECURITY
 527
 528                                                         ruleName = MakeRetrieveViewRuleName(viewName);
 529                                                         relationName = RewriteGetRuleEventRel(ruleName);
 530                                                         if (!pg_ownercheck(userName, relationName, RELNAME))
 531                                                                 elog(ERROR, "%s: %s", relationName, aclcheck_error_strings[ACLCHECK_NOT_OWNER]);
 532                                                         pfree(ruleName);
 533 #endif
 534                                                         RemoveView(viewName);
 535                                                 }
 536                                                 break;
 537                                 }
 538                                 break;
 539                         }
 540                         break;
 541
 542                 case T_RemoveAggrStmt:
 543                         {
 544                                 RemoveAggrStmt *stmt = (RemoveAggrStmt *) parsetree;
 545
 546                                 PS_SET_STATUS(commandTag = "DROP");
 547                                 CHECK_IF_ABORTED();
 548                                 RemoveAggregate(stmt->aggname, stmt->aggtype);
 549                         }
 550                         break;
 551
 552                 case T_RemoveFuncStmt:
 553                         {
 554                                 RemoveFuncStmt *stmt = (RemoveFuncStmt *) parsetree;
 555
 556                                 PS_SET_STATUS(commandTag = "DROP");
 557                                 CHECK_IF_ABORTED();
 558                                 RemoveFunction(stmt->funcname,
 559                                                            length(stmt->args),
 560                                                            stmt->args);
 561                         }
 562                         break;
 563
 564                 case T_RemoveOperStmt:
 565                         {
 566                                 RemoveOperStmt *stmt = (RemoveOperStmt *) parsetree;
 567                                 char       *type1 = (char *) NULL;
 568                                 char       *type2 = (char *) NULL;
 569
 570                                 PS_SET_STATUS(commandTag = "DROP");
 571                                 CHECK_IF_ABORTED();
 572
 573                                 if (lfirst(stmt->args) != NULL)
 574                                         type1 = strVal(lfirst(stmt->args));
 575                                 if (lsecond(stmt->args) != NULL)
 576                                         type2 = strVal(lsecond(stmt->args));
 577                                 RemoveOperator(stmt->opname, type1, type2);
 578                         }
 579                         break;
 580
 581                 case T_VersionStmt:
 582                         elog(ERROR, "CREATE VERSION is not currently implemented");
 583                         break;
 584
 585                 case T_CreatedbStmt:
 586                         {
 587                                 CreatedbStmt *stmt = (CreatedbStmt *) parsetree;
 588
 589                                 PS_SET_STATUS(commandTag = "CREATE DATABASE");
 590                                 CHECK_IF_ABORTED();
 591                                 createdb(stmt->dbname, stmt->dbpath, stmt->encoding);
 592                         }
 593                         break;
 594
 595                 case T_DropdbStmt:
 596                         {
 597                                 DropdbStmt *stmt = (DropdbStmt *) parsetree;
 598
 599                                 PS_SET_STATUS(commandTag = "DROP DATABASE");
 600                                 CHECK_IF_ABORTED();
 601                                 dropdb(stmt->dbname);
 602                         }
 603                         break;
 604
 605                         /* Query-level asynchronous notification */
 606                 case T_NotifyStmt:
 607                         {
 608                                 NotifyStmt *stmt = (NotifyStmt *) parsetree;
 609
 610                                 PS_SET_STATUS(commandTag = "NOTIFY");
 611                                 CHECK_IF_ABORTED();
 612
 613                                 Async_Notify(stmt->relname);
 614                         }
 615                         break;
 616
 617                 case T_ListenStmt:
 618                         {
 619                                 ListenStmt *stmt = (ListenStmt *) parsetree;
 620
 621                                 PS_SET_STATUS(commandTag = "LISTEN");
 622                                 CHECK_IF_ABORTED();
 623
 624                                 Async_Listen(stmt->relname, MyProcPid);
 625                         }
 626                         break;
 627
 628                 case T_UnlistenStmt:
 629                         {
 630                                 UnlistenStmt *stmt = (UnlistenStmt *) parsetree;
 631
 632                                 PS_SET_STATUS(commandTag = "UNLISTEN");
 633                                 CHECK_IF_ABORTED();
 634
 635                                 Async_Unlisten(stmt->relname, MyProcPid);
 636                         }
 637                         break;
 638
 639                         /*
 640                          * ******************************** dynamic loader ********************************
 641                          *
 642                          */
 643                 case T_LoadStmt:
 644                         {
 645                                 LoadStmt   *stmt = (LoadStmt *) parsetree;
 646
 647                                 PS_SET_STATUS(commandTag = "LOAD");
 648                                 CHECK_IF_ABORTED();
 649
 650                                 closeAllVfds(); /* probably not necessary... */
 651                                 load_file(stmt->filename);
 652                         }
 653                         break;
 654
 655                 case T_ClusterStmt:
 656                         {
 657                                 ClusterStmt *stmt = (ClusterStmt *) parsetree;
 658
 659                                 PS_SET_STATUS(commandTag = "CLUSTER");
 660                                 CHECK_IF_ABORTED();
 661
 662                                 cluster(stmt->relname, stmt->indexname);
 663                         }
 664                         break;
 665
 666                 case T_VacuumStmt:
 667                         PS_SET_STATUS(commandTag = "VACUUM");
 668                         CHECK_IF_ABORTED();
 669                         vacuum(((VacuumStmt *) parsetree)->vacrel,
 670                                    ((VacuumStmt *) parsetree)->verbose,
 671                                    ((VacuumStmt *) parsetree)->analyze,
 672                                    ((VacuumStmt *) parsetree)->va_spec);
 673                         break;
 674
 675                 case T_ExplainStmt:
 676                         {
 677                                 ExplainStmt *stmt = (ExplainStmt *) parsetree;
 678
 679                                 PS_SET_STATUS(commandTag = "EXPLAIN");
 680                                 CHECK_IF_ABORTED();
 681
 682                                 ExplainQuery(stmt->query, stmt->verbose, dest);
 683                         }
 684                         break;
 685
 686 #ifdef NOT_USED
 687
 688                         /*
 689                          * ******************************** Tioga-related statements *******************************
 690                          */
 691                 case T_RecipeStmt:
 692                         {
 693                                 RecipeStmt *stmt = (RecipeStmt *) parsetree;
 694
 695                                 PS_SET_STATUS(commandTag = "EXECUTE RECIPE");
 696                                 CHECK_IF_ABORTED();
 697                                 beginRecipe(stmt);
 698                         }
 699                         break;
 700 #endif
 701
 702                         /*
 703                          * ******************************** set variable statements *******************************
 704                          */
 705                 case T_VariableSetStmt:
 706                         {
 707                                 VariableSetStmt *n = (VariableSetStmt *) parsetree;
 708
 709                                 SetPGVariable(n->name, n->value);
 710                                 PS_SET_STATUS(commandTag = "SET VARIABLE");
 711                         }
 712                         break;
 713
 714                 case T_VariableShowStmt:
 715                         {
 716                                 VariableShowStmt *n = (VariableShowStmt *) parsetree;
 717
 718                                 GetPGVariable(n->name);
 719                                 PS_SET_STATUS(commandTag = "SHOW VARIABLE");
 720                         }
 721                         break;
 722
 723                 case T_VariableResetStmt:
 724                         {
 725                                 VariableResetStmt *n = (VariableResetStmt *) parsetree;
 726
 727                                 ResetPGVariable(n->name);
 728                                 PS_SET_STATUS(commandTag = "RESET VARIABLE");
 729                         }
 730                         break;
 731
 732                         /*
 733                          * ******************************** TRIGGER statements *******************************
 734                          */
 735                 case T_CreateTrigStmt:
 736                         PS_SET_STATUS(commandTag = "CREATE");
 737                         CHECK_IF_ABORTED();
 738
 739                         CreateTrigger((CreateTrigStmt *) parsetree);
 740                         break;
 741
 742                 case T_DropTrigStmt:
 743                         PS_SET_STATUS(commandTag = "DROP");
 744                         CHECK_IF_ABORTED();
 745
 746                         DropTrigger((DropTrigStmt *) parsetree);
 747                         break;
 748
 749                         /*
 750                          * ************* PROCEDURAL LANGUAGE statements *****************
 751                          */
 752                 case T_CreatePLangStmt:
 753                         PS_SET_STATUS(commandTag = "CREATE");
 754                         CHECK_IF_ABORTED();
 755
 756                         CreateProceduralLanguage((CreatePLangStmt *) parsetree);
 757                         break;
 758
 759                 case T_DropPLangStmt:
 760                         PS_SET_STATUS(commandTag = "DROP");
 761                         CHECK_IF_ABORTED();
 762
 763                         DropProceduralLanguage((DropPLangStmt *) parsetree);
 764                         break;
 765
 766                         /*
 767                          * ******************************** USER statements ****
 768                          *
 769                          */
 770                 case T_CreateUserStmt:
 771                         PS_SET_STATUS(commandTag = "CREATE USER");
 772                         CHECK_IF_ABORTED();
 773
 774                         CreateUser((CreateUserStmt *) parsetree);
 775                         break;
 776
 777                 case T_AlterUserStmt:
 778                         PS_SET_STATUS(commandTag = "ALTER USER");
 779                         CHECK_IF_ABORTED();
 780
 781                         AlterUser((AlterUserStmt *) parsetree);
 782                         break;
 783
 784                 case T_DropUserStmt:
 785                         PS_SET_STATUS(commandTag = "DROP USER");
 786                         CHECK_IF_ABORTED();
 787
 788                         DropUser((DropUserStmt *) parsetree);
 789                         break;
 790
 791                 case T_LockStmt:
 792                         PS_SET_STATUS(commandTag = "LOCK TABLE");
 793                         CHECK_IF_ABORTED();
 794
 795                         LockTableCommand((LockStmt *) parsetree);
 796                         break;
 797
 798                 case T_ConstraintsSetStmt:
 799                         PS_SET_STATUS(commandTag = "SET CONSTRAINTS");
 800                         CHECK_IF_ABORTED();
 801
 802                         DeferredTriggerSetState((ConstraintsSetStmt *) parsetree);
 803                         break;
 804
 805         case T_CreateGroupStmt:
 806             PS_SET_STATUS(commandTag = "CREATE GROUP");
 807                         CHECK_IF_ABORTED();
 808
 809             CreateGroup((CreateGroupStmt *) parsetree);
 810             break;
 811
 812         case T_AlterGroupStmt:
 813             PS_SET_STATUS(commandTag = "ALTER GROUP");
 814                         CHECK_IF_ABORTED();
 815
 816             AlterGroup((AlterGroupStmt *) parsetree, "ALTER GROUP");
 817             break;
 818
 819         case T_DropGroupStmt:
 820             PS_SET_STATUS(commandTag = "DROP GROUP");
 821                         CHECK_IF_ABORTED();
 822
 823             DropGroup((DropGroupStmt *) parsetree);
 824             break;
 825
 826                         /*
 827                          * ******************************** default ********************************
 828                          *
 829                          */
 830                 default:
 831                         elog(ERROR, "ProcessUtility: command #%d unsupported",
 832                                  nodeTag(parsetree));
 833                         break;
 834         }
 835
 836         /* ----------------
 837          *      tell fe/be or whatever that we're done.
 838          * ----------------
 839          */
 840         EndCommand(commandTag, dest);
 841 }