granicus.if.org Git - postgresql/blob - src/backend/bootstrap/bootstrap.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * bootstrap.c
   4  *        routines to support running postgres in 'bootstrap' mode
   5  *      bootstrap mode is used to create the initial template database
   6  *
   7  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * IDENTIFICATION
  11  *        $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.143 2002/09/25 20:31:40 tgl Exp $
  12  *
  13  *-------------------------------------------------------------------------
  14  */
  15 #include "postgres.h"
  16
  17 #include <unistd.h>
  18 #include <time.h>
  19 #include <signal.h>
  20 #include <setjmp.h>
  21 #ifdef HAVE_GETOPT_H
  22 #include <getopt.h>
  23 #endif
  24
  25 #define BOOTSTRAP_INCLUDE               /* mask out stuff in tcop/tcopprot.h */
  26
  27 #include "access/genam.h"
  28 #include "access/heapam.h"
  29 #include "access/xlog.h"
  30 #include "bootstrap/bootstrap.h"
  31 #include "catalog/catname.h"
  32 #include "catalog/index.h"
  33 #include "catalog/pg_type.h"
  34 #include "libpq/pqsignal.h"
  35 #include "miscadmin.h"
  36 #include "storage/ipc.h"
  37 #include "storage/proc.h"
  38 #include "tcop/tcopprot.h"
  39 #include "utils/builtins.h"
  40 #include "utils/fmgroids.h"
  41 #include "utils/guc.h"
  42 #include "utils/lsyscache.h"
  43 #include "utils/relcache.h"
  44
  45
  46 #define ALLOC(t, c)             ((t *) calloc((unsigned)(c), sizeof(t)))
  47
  48
  49 extern int      Int_yyparse(void);
  50 static hashnode *AddStr(char *str, int strlength, int mderef);
  51 static Form_pg_attribute AllocateAttribute(void);
  52 static bool BootstrapAlreadySeen(Oid id);
  53 static int      CompHash(char *str, int len);
  54 static hashnode *FindStr(char *str, int length, hashnode *mderef);
  55 static Oid      gettype(char *type);
  56 static void cleanup(void);
  57
  58 /* ----------------
  59  *              global variables
  60  * ----------------
  61  */
  62
  63 Relation        boot_reldesc;           /* current relation descriptor */
  64
  65 /*
  66  * In the lexical analyzer, we need to get the reference number quickly from
  67  * the string, and the string from the reference number.  Thus we have
  68  * as our data structure a hash table, where the hashing key taken from
  69  * the particular string.  The hash table is chained.  One of the fields
  70  * of the hash table node is an index into the array of character pointers.
  71  * The unique index number that every string is assigned is simply the
  72  * position of its string pointer in the array of string pointers.
  73  */
  74
  75 #define STRTABLESIZE    10000
  76 #define HASHTABLESIZE   503
  77
  78 /* Hash function numbers */
  79 #define NUM             23
  80 #define NUMSQR  529
  81 #define NUMCUBE 12167
  82
  83 char       *strtable[STRTABLESIZE];
  84 hashnode   *hashtable[HASHTABLESIZE];
  85
  86 static int      strtable_end = -1;      /* Tells us last occupied string space */
  87
  88 /*-
  89  * Basic information associated with each type.  This is used before
  90  * pg_type is created.
  91  *
  92  *              XXX several of these input/output functions do catalog scans
  93  *                      (e.g., F_REGPROCIN scans pg_proc).      this obviously creates some
  94  *                      order dependencies in the catalog creation process.
  95  */
  96 struct typinfo
  97 {
  98         char            name[NAMEDATALEN];
  99         Oid                     oid;
 100         Oid                     elem;
 101         int16           len;
 102         Oid                     inproc;
 103         Oid                     outproc;
 104 };
 105
 106 static struct typinfo Procid[] = {
 107         {"bool", BOOLOID, 0, 1, F_BOOLIN, F_BOOLOUT},
 108         {"bytea", BYTEAOID, 0, -1, F_BYTEAIN, F_BYTEAOUT},
 109         {"char", CHAROID, 0, 1, F_CHARIN, F_CHAROUT},
 110         {"name", NAMEOID, 0, NAMEDATALEN, F_NAMEIN, F_NAMEOUT},
 111         {"int2", INT2OID, 0, 2, F_INT2IN, F_INT2OUT},
 112         {"int2vector", INT2VECTOROID, 0, INDEX_MAX_KEYS * 2, F_INT2VECTORIN, F_INT2VECTOROUT},
 113         {"int4", INT4OID, 0, 4, F_INT4IN, F_INT4OUT},
 114         {"regproc", REGPROCOID, 0, 4, F_REGPROCIN, F_REGPROCOUT},
 115         {"regclass", REGCLASSOID, 0, 4, F_REGCLASSIN, F_REGCLASSOUT},
 116         {"regtype", REGTYPEOID, 0, 4, F_REGTYPEIN, F_REGTYPEOUT},
 117         {"text", TEXTOID, 0, -1, F_TEXTIN, F_TEXTOUT},
 118         {"oid", OIDOID, 0, 4, F_OIDIN, F_OIDOUT},
 119         {"tid", TIDOID, 0, 6, F_TIDIN, F_TIDOUT},
 120         {"xid", XIDOID, 0, 4, F_XIDIN, F_XIDOUT},
 121         {"cid", CIDOID, 0, 4, F_CIDIN, F_CIDOUT},
 122         {"oidvector", OIDVECTOROID, 0, INDEX_MAX_KEYS * 4, F_OIDVECTORIN, F_OIDVECTOROUT},
 123         {"smgr", 210, 0, 2, F_SMGRIN, F_SMGROUT},
 124         {"_int4", 1007, INT4OID, -1, F_ARRAY_IN, F_ARRAY_OUT},
 125         {"_aclitem", 1034, 1033, -1, F_ARRAY_IN, F_ARRAY_OUT}
 126 };
 127
 128 static int      n_types = sizeof(Procid) / sizeof(struct typinfo);
 129
 130 struct typmap
 131 {                                                               /* a hack */
 132         Oid                     am_oid;
 133         FormData_pg_type am_typ;
 134 };
 135
 136 static struct typmap **Typ = (struct typmap **) NULL;
 137 static struct typmap *Ap = (struct typmap *) NULL;
 138
 139 static int      Warnings = 0;
 140 static char Blanks[MAXATTR];
 141
 142 static char *relname;                   /* current relation name */
 143
 144 Form_pg_attribute attrtypes[MAXATTR];   /* points to attribute info */
 145 static Datum values[MAXATTR];   /* corresponding attribute values */
 146 int                     numattr;                        /* number of attributes for cur. rel */
 147
 148 static MemoryContext nogc = NULL;               /* special no-gc mem context */
 149
 150 extern int      optind;
 151 extern char *optarg;
 152
 153 /*
 154  *      At bootstrap time, we first declare all the indices to be built, and
 155  *      then build them.  The IndexList structure stores enough information
 156  *      to allow us to build the indices after they've been declared.
 157  */
 158
 159 typedef struct _IndexList
 160 {
 161         Oid                     il_heap;
 162         Oid                     il_ind;
 163         IndexInfo  *il_info;
 164         struct _IndexList *il_next;
 165 } IndexList;
 166
 167 static IndexList *ILHead = (IndexList *) NULL;
 168
 169
 170 /* ----------------------------------------------------------------
 171  *                                              misc functions
 172  * ----------------------------------------------------------------
 173  */
 174
 175 /* ----------------
 176  *              error handling / abort routines
 177  * ----------------
 178  */
 179 void
 180 err_out(void)
 181 {
 182         Warnings++;
 183         cleanup();
 184 }
 185
 186 /* usage:
 187    usage help for the bootstrap backen
 188 */
 189 static void
 190 usage(void)
 191 {
 192         fprintf(stderr,
 193                         gettext("Usage:\n"
 194                                         "  postgres -boot [-d level] [-D datadir] [-F] [-o file] [-x num] dbname\n"
 195                                         "  -d 1-5           debug mode\n"
 196                                         "  -D datadir       data directory\n"
 197                                         "  -F               turn off fsync\n"
 198                                         "  -o file          send debug output to file\n"
 199                                         "  -x num           internal use\n"));
 200
 201         proc_exit(1);
 202 }
 203
 204
 205
 206 int
 207 BootstrapMain(int argc, char *argv[])
 208 /* ----------------------------------------------------------------
 209  *       The main loop for handling the backend in bootstrap mode
 210  *       the bootstrap mode is used to initialize the template database
 211  *       the bootstrap backend doesn't speak SQL, but instead expects
 212  *       commands in a special bootstrap language.
 213  *
 214  *       The arguments passed in to BootstrapMain are the run-time arguments
 215  *       without the argument '-boot', the caller is required to have
 216  *       removed -boot from the run-time args
 217  * ----------------------------------------------------------------
 218  */
 219 {
 220         int                     i;
 221         char       *dbName;
 222         int                     flag;
 223         int                     xlogop = BS_XLOG_NOP;
 224         char       *potential_DataDir = NULL;
 225
 226         /*
 227          * initialize globals
 228          */
 229
 230         MyProcPid = getpid();
 231
 232         /*
 233          * Fire up essential subsystems: error and memory management
 234          *
 235          * If we are running under the postmaster, this is done already.
 236          */
 237         if (!IsUnderPostmaster)
 238                 MemoryContextInit();
 239
 240         /*
 241          * process command arguments
 242          */
 243
 244         /* Set defaults, to be overriden by explicit options below */
 245         dbName = NULL;
 246         if (!IsUnderPostmaster)
 247         {
 248                 InitializeGUCOptions();
 249                 potential_DataDir = getenv("PGDATA");   /* Null if no PGDATA
 250                                                                                                  * variable */
 251         }
 252
 253         while ((flag = getopt(argc, argv, "B:d:D:Fo:px:")) != -1)
 254         {
 255                 switch (flag)
 256                 {
 257                         case 'D':
 258                                 potential_DataDir = optarg;
 259                                 break;
 260                         case 'd':
 261                                 {
 262                                         /* Turn on debugging for the bootstrap process. */
 263                                         char       *debugstr = palloc(strlen("debug") + strlen(optarg) + 1);
 264
 265                                         sprintf(debugstr, "debug%s", optarg);
 266                                         SetConfigOption("server_min_messages", debugstr,
 267                                                                         PGC_POSTMASTER, PGC_S_ARGV);
 268                                         SetConfigOption("client_min_messages", debugstr,
 269                                                                         PGC_POSTMASTER, PGC_S_ARGV);
 270                                         pfree(debugstr);
 271                                         break;
 272                                 }
 273                                 break;
 274                         case 'F':
 275                                 SetConfigOption("fsync", "false", PGC_POSTMASTER, PGC_S_ARGV);
 276                                 break;
 277                         case 'o':
 278                                 StrNCpy(OutputFileName, optarg, MAXPGPATH);
 279                                 break;
 280                         case 'x':
 281                                 xlogop = atoi(optarg);
 282                                 break;
 283                         case 'p':
 284                                 /* indicates fork from postmaster */
 285                                 break;
 286                         case 'B':
 287                                 SetConfigOption("shared_buffers", optarg, PGC_POSTMASTER, PGC_S_ARGV);
 288                                 break;
 289                         default:
 290                                 usage();
 291                                 break;
 292                 }
 293         }                                                       /* while */
 294
 295         if (argc - optind != 1)
 296                 usage();
 297
 298         dbName = argv[optind];
 299
 300         Assert(dbName);
 301
 302         if (!IsUnderPostmaster)
 303         {
 304                 if (!potential_DataDir)
 305                 {
 306                         fprintf(stderr,
 307                                         gettext("%s does not know where to find the database system data.\n"
 308                                                         "You must specify the directory that contains the database system\n"
 309                                                         "either by specifying the -D invocation option or by setting the\n"
 310                                                         "PGDATA environment variable.\n\n"),
 311                                         argv[0]);
 312                         proc_exit(1);
 313                 }
 314                 SetDataDir(potential_DataDir);
 315         }
 316
 317         /* Validate we have been given a reasonable-looking DataDir */
 318         Assert(DataDir);
 319         ValidatePgVersion(DataDir);
 320
 321         if (IsUnderPostmaster)
 322         {
 323                 /*
 324                  * Properly accept or ignore signals the postmaster might send us
 325                  */
 326                 pqsignal(SIGHUP, SIG_IGN);
 327                 pqsignal(SIGINT, SIG_IGN);              /* ignore query-cancel */
 328                 pqsignal(SIGTERM, die);
 329                 pqsignal(SIGQUIT, quickdie);
 330                 pqsignal(SIGALRM, SIG_IGN);
 331                 pqsignal(SIGPIPE, SIG_IGN);
 332                 pqsignal(SIGUSR1, SIG_IGN);
 333                 pqsignal(SIGUSR2, SIG_IGN);
 334
 335                 /*
 336                  * Reset some signals that are accepted by postmaster but not here
 337                  */
 338                 pqsignal(SIGCHLD, SIG_DFL);
 339                 pqsignal(SIGTTIN, SIG_DFL);
 340                 pqsignal(SIGTTOU, SIG_DFL);
 341                 pqsignal(SIGCONT, SIG_DFL);
 342                 pqsignal(SIGWINCH, SIG_DFL);
 343
 344                 /*
 345                  * Unblock signals (they were blocked when the postmaster forked
 346                  * us)
 347                  */
 348                 PG_SETMASK(&UnBlockSig);
 349         }
 350         else
 351         {
 352                 /* Set up appropriately for interactive use */
 353                 pqsignal(SIGHUP, die);
 354                 pqsignal(SIGINT, die);
 355                 pqsignal(SIGTERM, die);
 356                 pqsignal(SIGQUIT, die);
 357
 358                 /*
 359                  * Create lockfile for data directory.
 360                  */
 361                 if (!CreateDataDirLockFile(DataDir, false))
 362                         proc_exit(1);
 363         }
 364
 365         SetProcessingMode(BootstrapProcessing);
 366         IgnoreSystemIndexes(true);
 367
 368         XLOGPathInit();
 369
 370         BaseInit();
 371
 372         if (IsUnderPostmaster)
 373                 InitDummyProcess();             /* needed to get LWLocks */
 374
 375         /*
 376          * XLOG operations
 377          */
 378         SetProcessingMode(NormalProcessing);
 379
 380         switch (xlogop)
 381         {
 382                 case BS_XLOG_NOP:
 383                         StartupXLOG();
 384                         break;
 385
 386                 case BS_XLOG_BOOTSTRAP:
 387                         BootStrapXLOG();
 388                         StartupXLOG();
 389                         break;
 390
 391                 case BS_XLOG_CHECKPOINT:
 392                         CreateDummyCaches();
 393                         CreateCheckPoint(false);
 394                         SetSavedRedoRecPtr();           /* pass redo ptr back to
 395                                                                                  * postmaster */
 396                         proc_exit(0);           /* done */
 397
 398                 case BS_XLOG_STARTUP:
 399                         StartupXLOG();
 400                         proc_exit(0);           /* done */
 401
 402                 case BS_XLOG_SHUTDOWN:
 403                         ShutdownXLOG();
 404                         proc_exit(0);           /* done */
 405
 406                 default:
 407                         elog(PANIC, "Unsupported XLOG op %d", xlogop);
 408                         proc_exit(0);
 409         }
 410
 411         SetProcessingMode(BootstrapProcessing);
 412
 413         /*
 414          * backend initialization
 415          */
 416         InitPostgres(dbName, NULL);
 417
 418         for (i = 0; i < MAXATTR; i++)
 419         {
 420                 attrtypes[i] = (Form_pg_attribute) NULL;
 421                 Blanks[i] = ' ';
 422         }
 423         for (i = 0; i < STRTABLESIZE; ++i)
 424                 strtable[i] = NULL;
 425         for (i = 0; i < HASHTABLESIZE; ++i)
 426                 hashtable[i] = NULL;
 427
 428         /*
 429          * abort processing resumes here
 430          */
 431         if (sigsetjmp(Warn_restart, 1) != 0)
 432         {
 433                 Warnings++;
 434                 AbortCurrentTransaction();
 435         }
 436
 437         /*
 438          * process input.
 439          */
 440
 441         /*
 442          * the sed script boot.sed renamed yyparse to Int_yyparse for the
 443          * bootstrap parser to avoid conflicts with the normal SQL parser
 444          */
 445         Int_yyparse();
 446
 447         SetProcessingMode(NormalProcessing);
 448         CreateCheckPoint(true);
 449         SetProcessingMode(BootstrapProcessing);
 450
 451         /* clean up processing */
 452         StartTransactionCommand(true);
 453         cleanup();
 454
 455         /* not reached, here to make compiler happy */
 456         return 0;
 457
 458 }
 459
 460 /* ----------------------------------------------------------------
 461  *                              MANUAL BACKEND INTERACTIVE INTERFACE COMMANDS
 462  * ----------------------------------------------------------------
 463  */
 464
 465 /* ----------------
 466  *              boot_openrel
 467  * ----------------
 468  */
 469 void
 470 boot_openrel(char *relname)
 471 {
 472         int                     i;
 473         struct typmap **app;
 474         Relation        rel;
 475         HeapScanDesc scan;
 476         HeapTuple       tup;
 477
 478         if (strlen(relname) >= NAMEDATALEN - 1)
 479                 relname[NAMEDATALEN - 1] = '\0';
 480
 481         if (Typ == (struct typmap **) NULL)
 482         {
 483                 rel = heap_openr(TypeRelationName, NoLock);
 484                 scan = heap_beginscan(rel, SnapshotNow, 0, (ScanKey) NULL);
 485                 i = 0;
 486                 while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
 487                         ++i;
 488                 heap_endscan(scan);
 489                 app = Typ = ALLOC(struct typmap *, i + 1);
 490                 while (i-- > 0)
 491                         *app++ = ALLOC(struct typmap, 1);
 492                 *app = (struct typmap *) NULL;
 493                 scan = heap_beginscan(rel, SnapshotNow, 0, (ScanKey) NULL);
 494                 app = Typ;
 495                 while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
 496                 {
 497                         (*app)->am_oid = HeapTupleGetOid(tup);
 498                         memcpy((char *) &(*app)->am_typ,
 499                                    (char *) GETSTRUCT(tup),
 500                                    sizeof((*app)->am_typ));
 501                         app++;
 502                 }
 503                 heap_endscan(scan);
 504                 heap_close(rel, NoLock);
 505         }
 506
 507         if (boot_reldesc != NULL)
 508                 closerel(NULL);
 509
 510         elog(DEBUG3, "open relation %s, attrsize %d", relname ? relname : "(null)",
 511                  (int) ATTRIBUTE_TUPLE_SIZE);
 512
 513         boot_reldesc = heap_openr(relname, NoLock);
 514         numattr = boot_reldesc->rd_rel->relnatts;
 515         for (i = 0; i < numattr; i++)
 516         {
 517                 if (attrtypes[i] == NULL)
 518                         attrtypes[i] = AllocateAttribute();
 519                 memmove((char *) attrtypes[i],
 520                                 (char *) boot_reldesc->rd_att->attrs[i],
 521                                 ATTRIBUTE_TUPLE_SIZE);
 522
 523                 {
 524                         Form_pg_attribute at = attrtypes[i];
 525
 526                         elog(DEBUG3, "create attribute %d name %s len %d num %d type %u",
 527                                  i, NameStr(at->attname), at->attlen, at->attnum,
 528                                  at->atttypid);
 529                 }
 530         }
 531 }
 532
 533 /* ----------------
 534  *              closerel
 535  * ----------------
 536  */
 537 void
 538 closerel(char *name)
 539 {
 540         if (name)
 541         {
 542                 if (boot_reldesc)
 543                 {
 544                         if (strcmp(RelationGetRelationName(boot_reldesc), name) != 0)
 545                                 elog(ERROR, "closerel: close of '%s' when '%s' was expected",
 546                                          name, relname ? relname : "(null)");
 547                 }
 548                 else
 549                         elog(ERROR, "closerel: close of '%s' before any relation was opened",
 550                                  name);
 551         }
 552
 553         if (boot_reldesc == NULL)
 554                 elog(ERROR, "no open relation to close");
 555         else
 556         {
 557                 elog(DEBUG3, "close relation %s", relname ? relname : "(null)");
 558                 heap_close(boot_reldesc, NoLock);
 559                 boot_reldesc = (Relation) NULL;
 560         }
 561 }
 562
 563
 564
 565 /* ----------------
 566  * DEFINEATTR()
 567  *
 568  * define a <field,type> pair
 569  * if there are n fields in a relation to be created, this routine
 570  * will be called n times
 571  * ----------------
 572  */
 573 void
 574 DefineAttr(char *name, char *type, int attnum)
 575 {
 576         int                     attlen;
 577         Oid                     typeoid;
 578
 579         if (boot_reldesc != NULL)
 580         {
 581                 elog(LOG, "warning: no open relations allowed with 'create' command");
 582                 closerel(relname);
 583         }
 584
 585         if (attrtypes[attnum] == (Form_pg_attribute) NULL)
 586                 attrtypes[attnum] = AllocateAttribute();
 587         MemSet(attrtypes[attnum], 0, ATTRIBUTE_TUPLE_SIZE);
 588
 589         namestrcpy(&attrtypes[attnum]->attname, name);
 590         elog(DEBUG3, "column %s %s", NameStr(attrtypes[attnum]->attname), type);
 591         attrtypes[attnum]->attnum = attnum + 1;         /* fillatt */
 592
 593         typeoid = gettype(type);
 594
 595         if (Typ != (struct typmap **) NULL)
 596         {
 597                 attrtypes[attnum]->atttypid = Ap->am_oid;
 598                 attlen = attrtypes[attnum]->attlen = Ap->am_typ.typlen;
 599                 attrtypes[attnum]->attbyval = Ap->am_typ.typbyval;
 600                 attrtypes[attnum]->attstorage = Ap->am_typ.typstorage;
 601                 attrtypes[attnum]->attalign = Ap->am_typ.typalign;
 602         }
 603         else
 604         {
 605                 attrtypes[attnum]->atttypid = Procid[typeoid].oid;
 606                 attlen = attrtypes[attnum]->attlen = Procid[typeoid].len;
 607
 608                 /*
 609                  * Cheat like mad to fill in these items from the length only.
 610                  * This only has to work for types that appear in Procid[].
 611                  */
 612                 switch (attlen)
 613                 {
 614                         case 1:
 615                                 attrtypes[attnum]->attbyval = true;
 616                                 attrtypes[attnum]->attstorage = 'p';
 617                                 attrtypes[attnum]->attalign = 'c';
 618                                 break;
 619                         case 2:
 620                                 attrtypes[attnum]->attbyval = true;
 621                                 attrtypes[attnum]->attstorage = 'p';
 622                                 attrtypes[attnum]->attalign = 's';
 623                                 break;
 624                         case 4:
 625                                 attrtypes[attnum]->attbyval = true;
 626                                 attrtypes[attnum]->attstorage = 'p';
 627                                 attrtypes[attnum]->attalign = 'i';
 628                                 break;
 629                         case -1:
 630                                 attrtypes[attnum]->attbyval = false;
 631                                 attrtypes[attnum]->attstorage = 'x';
 632                                 attrtypes[attnum]->attalign = 'i';
 633                                 break;
 634                         default:
 635                                 /* TID and fixed-length arrays, such as oidvector */
 636                                 attrtypes[attnum]->attbyval = false;
 637                                 attrtypes[attnum]->attstorage = 'p';
 638                                 attrtypes[attnum]->attalign = 'i';
 639                                 break;
 640                 }
 641         }
 642         attrtypes[attnum]->attcacheoff = -1;
 643         attrtypes[attnum]->atttypmod = -1;
 644         attrtypes[attnum]->attislocal = true;
 645
 646         /*
 647          * Mark as "not null" if type is fixed-width and prior columns are
 648          * too. This corresponds to case where column can be accessed directly
 649          * via C struct declaration.
 650          */
 651         if (attlen > 0)
 652         {
 653                 int                     i;
 654
 655                 for (i = 0; i < attnum; i++)
 656                 {
 657                         if (attrtypes[i]->attlen <= 0)
 658                                 break;
 659                 }
 660                 if (i == attnum)
 661                         attrtypes[attnum]->attnotnull = true;
 662         }
 663 }
 664
 665
 666 /* ----------------
 667  *              InsertOneTuple
 668  *
 669  * If objectid is not zero, it is a specific OID to assign to the tuple.
 670  * Otherwise, an OID will be assigned (if necessary) by heap_insert.
 671  * ----------------
 672  */
 673 void
 674 InsertOneTuple(Oid objectid)
 675 {
 676         HeapTuple       tuple;
 677         TupleDesc       tupDesc;
 678         int                     i;
 679
 680         elog(DEBUG3, "inserting row oid %u, %d columns", objectid, numattr);
 681
 682         tupDesc = CreateTupleDesc(numattr,
 683                                                           RelationGetForm(boot_reldesc)->relhasoids,
 684                                                           attrtypes);
 685         tuple = heap_formtuple(tupDesc, values, Blanks);
 686         if (objectid != (Oid) 0)
 687                 HeapTupleSetOid(tuple, objectid);
 688         pfree(tupDesc);                         /* just free's tupDesc, not the attrtypes */
 689
 690         simple_heap_insert(boot_reldesc, tuple);
 691         heap_freetuple(tuple);
 692         elog(DEBUG3, "row inserted");
 693
 694         /*
 695          * Reset blanks for next tuple
 696          */
 697         for (i = 0; i < numattr; i++)
 698                 Blanks[i] = ' ';
 699 }
 700
 701 /* ----------------
 702  *              InsertOneValue
 703  * ----------------
 704  */
 705 void
 706 InsertOneValue(char *value, int i)
 707 {
 708         int                     typeindex;
 709         char       *prt;
 710         struct typmap **app;
 711
 712         AssertArg(i >= 0 || i < MAXATTR);
 713
 714         elog(DEBUG3, "inserting column %d value '%s'", i, value);
 715
 716         if (Typ != (struct typmap **) NULL)
 717         {
 718                 struct typmap *ap;
 719
 720                 elog(DEBUG3, "Typ != NULL");
 721                 app = Typ;
 722                 while (*app && (*app)->am_oid != boot_reldesc->rd_att->attrs[i]->atttypid)
 723                         ++app;
 724                 ap = *app;
 725                 if (ap == NULL)
 726                 {
 727                         elog(FATAL, "unable to find atttypid %u in Typ list",
 728                                  boot_reldesc->rd_att->attrs[i]->atttypid);
 729                 }
 730                 values[i] = OidFunctionCall3(ap->am_typ.typinput,
 731                                                                          CStringGetDatum(value),
 732                                                                          ObjectIdGetDatum(ap->am_typ.typelem),
 733                                                                          Int32GetDatum(-1));
 734                 prt = DatumGetCString(OidFunctionCall3(ap->am_typ.typoutput,
 735                                                                                            values[i],
 736                                                                         ObjectIdGetDatum(ap->am_typ.typelem),
 737                                                                                            Int32GetDatum(-1)));
 738                 elog(DEBUG3, " -> %s", prt);
 739                 pfree(prt);
 740         }
 741         else
 742         {
 743                 for (typeindex = 0; typeindex < n_types; typeindex++)
 744                 {
 745                         if (Procid[typeindex].oid == attrtypes[i]->atttypid)
 746                                 break;
 747                 }
 748                 if (typeindex >= n_types)
 749                         elog(ERROR, "type oid %u not found", attrtypes[i]->atttypid);
 750                 elog(DEBUG3, "Typ == NULL, typeindex = %u", typeindex);
 751                 values[i] = OidFunctionCall3(Procid[typeindex].inproc,
 752                                                                          CStringGetDatum(value),
 753                                                                 ObjectIdGetDatum(Procid[typeindex].elem),
 754                                                                          Int32GetDatum(-1));
 755                 prt = DatumGetCString(OidFunctionCall3(Procid[typeindex].outproc,
 756                                                                                            values[i],
 757                                                                 ObjectIdGetDatum(Procid[typeindex].elem),
 758                                                                                            Int32GetDatum(-1)));
 759                 elog(DEBUG3, " -> %s", prt);
 760                 pfree(prt);
 761         }
 762         elog(DEBUG3, "inserted");
 763 }
 764
 765 /* ----------------
 766  *              InsertOneNull
 767  * ----------------
 768  */
 769 void
 770 InsertOneNull(int i)
 771 {
 772         elog(DEBUG3, "inserting column %d NULL", i);
 773         Assert(i >= 0 || i < MAXATTR);
 774         values[i] = PointerGetDatum(NULL);
 775         Blanks[i] = 'n';
 776 }
 777
 778 #define MORE_THAN_THE_NUMBER_OF_CATALOGS 256
 779
 780 static bool
 781 BootstrapAlreadySeen(Oid id)
 782 {
 783         static Oid      seenArray[MORE_THAN_THE_NUMBER_OF_CATALOGS];
 784         static int      nseen = 0;
 785         bool            seenthis;
 786         int                     i;
 787
 788         seenthis = false;
 789
 790         for (i = 0; i < nseen; i++)
 791         {
 792                 if (seenArray[i] == id)
 793                 {
 794                         seenthis = true;
 795                         break;
 796                 }
 797         }
 798         if (!seenthis)
 799         {
 800                 seenArray[nseen] = id;
 801                 nseen++;
 802         }
 803         return seenthis;
 804 }
 805
 806 /* ----------------
 807  *              cleanup
 808  * ----------------
 809  */
 810 static void
 811 cleanup()
 812 {
 813         static int      beenhere = 0;
 814
 815         if (!beenhere)
 816                 beenhere = 1;
 817         else
 818         {
 819                 elog(FATAL, "Memory manager fault: cleanup called twice.\n");
 820                 proc_exit(1);
 821         }
 822         if (boot_reldesc != NULL)
 823                 closerel(NULL);
 824         CommitTransactionCommand(true);
 825         proc_exit(Warnings);
 826 }
 827
 828 /* ----------------
 829  *              gettype
 830  *
 831  * NB: this is really ugly; it will return an integer index into Procid[],
 832  * and not an OID at all, until the first reference to a type not known in
 833  * Procid[].  At that point it will read and cache pg_type in the Typ array,
 834  * and subsequently return a real OID (and set the global pointer Ap to
 835  * point at the found row in Typ).      So caller must check whether Typ is
 836  * still NULL to determine what the return value is!
 837  * ----------------
 838  */
 839 static Oid
 840 gettype(char *type)
 841 {
 842         int                     i;
 843         Relation        rel;
 844         HeapScanDesc scan;
 845         HeapTuple       tup;
 846         struct typmap **app;
 847
 848         if (Typ != (struct typmap **) NULL)
 849         {
 850                 for (app = Typ; *app != (struct typmap *) NULL; app++)
 851                 {
 852                         if (strncmp(NameStr((*app)->am_typ.typname), type, NAMEDATALEN) == 0)
 853                         {
 854                                 Ap = *app;
 855                                 return (*app)->am_oid;
 856                         }
 857                 }
 858         }
 859         else
 860         {
 861                 for (i = 0; i < n_types; i++)
 862                 {
 863                         if (strncmp(type, Procid[i].name, NAMEDATALEN) == 0)
 864                                 return i;
 865                 }
 866                 elog(DEBUG3, "external type: %s", type);
 867                 rel = heap_openr(TypeRelationName, NoLock);
 868                 scan = heap_beginscan(rel, SnapshotNow, 0, (ScanKey) NULL);
 869                 i = 0;
 870                 while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
 871                         ++i;
 872                 heap_endscan(scan);
 873                 app = Typ = ALLOC(struct typmap *, i + 1);
 874                 while (i-- > 0)
 875                         *app++ = ALLOC(struct typmap, 1);
 876                 *app = (struct typmap *) NULL;
 877                 scan = heap_beginscan(rel, SnapshotNow, 0, (ScanKey) NULL);
 878                 app = Typ;
 879                 while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
 880                 {
 881                         (*app)->am_oid = HeapTupleGetOid(tup);
 882                         memmove((char *) &(*app++)->am_typ,
 883                                         (char *) GETSTRUCT(tup),
 884                                         sizeof((*app)->am_typ));
 885                 }
 886                 heap_endscan(scan);
 887                 heap_close(rel, NoLock);
 888                 return gettype(type);
 889         }
 890         elog(ERROR, "Error: unknown type '%s'.\n", type);
 891         err_out();
 892         /* not reached, here to make compiler happy */
 893         return 0;
 894 }
 895
 896 /* ----------------
 897  *              AllocateAttribute
 898  * ----------------
 899  */
 900 static Form_pg_attribute
 901 AllocateAttribute(void)
 902 {
 903         Form_pg_attribute attribute = (Form_pg_attribute) malloc(ATTRIBUTE_TUPLE_SIZE);
 904
 905         if (!PointerIsValid(attribute))
 906                 elog(FATAL, "AllocateAttribute: malloc failed");
 907         MemSet(attribute, 0, ATTRIBUTE_TUPLE_SIZE);
 908
 909         return attribute;
 910 }
 911
 912 /* ----------------
 913  *              MapArrayTypeName
 914  * XXX arrays of "basetype" are always "_basetype".
 915  *         this is an evil hack inherited from rel. 3.1.
 916  * XXX array dimension is thrown away because we
 917  *         don't support fixed-dimension arrays.  again,
 918  *         sickness from 3.1.
 919  *
 920  * the string passed in must have a '[' character in it
 921  *
 922  * the string returned is a pointer to static storage and should NOT
 923  * be freed by the CALLER.
 924  * ----------------
 925  */
 926 char *
 927 MapArrayTypeName(char *s)
 928 {
 929         int                     i,
 930                                 j;
 931         static char newStr[NAMEDATALEN];        /* array type names < NAMEDATALEN
 932                                                                                  * long */
 933
 934         if (s == NULL || s[0] == '\0')
 935                 return s;
 936
 937         j = 1;
 938         newStr[0] = '_';
 939         for (i = 0; i < NAMEDATALEN - 1 && s[i] != '['; i++, j++)
 940                 newStr[j] = s[i];
 941
 942         newStr[j] = '\0';
 943
 944         return newStr;
 945 }
 946
 947 /* ----------------
 948  *              EnterString
 949  *              returns the string table position of the identifier
 950  *              passed to it.  We add it to the table if we can't find it.
 951  * ----------------
 952  */
 953 int
 954 EnterString(char *str)
 955 {
 956         hashnode   *node;
 957         int                     len;
 958
 959         len = strlen(str);
 960
 961         node = FindStr(str, len, 0);
 962         if (node)
 963                 return node->strnum;
 964         else
 965         {
 966                 node = AddStr(str, len, 0);
 967                 return node->strnum;
 968         }
 969 }
 970
 971 /* ----------------
 972  *              LexIDStr
 973  *              when given an idnum into the 'string-table' return the string
 974  *              associated with the idnum
 975  * ----------------
 976  */
 977 char *
 978 LexIDStr(int ident_num)
 979 {
 980         return strtable[ident_num];
 981 }
 982
 983
 984 /* ----------------
 985  *              CompHash
 986  *
 987  *              Compute a hash function for a given string.  We look at the first,
 988  *              the last, and the middle character of a string to try to get spread
 989  *              the strings out.  The function is rather arbitrary, except that we
 990  *              are mod'ing by a prime number.
 991  * ----------------
 992  */
 993 static int
 994 CompHash(char *str, int len)
 995 {
 996         int                     result;
 997
 998         result = (NUM * str[0] + NUMSQR * str[len - 1] + NUMCUBE * str[(len - 1) / 2]);
 999
1000         return result % HASHTABLESIZE;
1001
1002 }
1003
1004 /* ----------------
1005  *              FindStr
1006  *
1007  *              This routine looks for the specified string in the hash
1008  *              table.  It returns a pointer to the hash node found,
1009  *              or NULL if the string is not in the table.
1010  * ----------------
1011  */
1012 static hashnode *
1013 FindStr(char *str, int length, hashnode *mderef)
1014 {
1015         hashnode   *node;
1016
1017         node = hashtable[CompHash(str, length)];
1018         while (node != NULL)
1019         {
1020                 /*
1021                  * We must differentiate between string constants that might have
1022                  * the same value as a identifier and the identifier itself.
1023                  */
1024                 if (!strcmp(str, strtable[node->strnum]))
1025                 {
1026                         return node;            /* no need to check */
1027                 }
1028                 else
1029                         node = node->next;
1030         }
1031         /* Couldn't find it in the list */
1032         return NULL;
1033 }
1034
1035 /* ----------------
1036  *              AddStr
1037  *
1038  *              This function adds the specified string, along with its associated
1039  *              data, to the hash table and the string table.  We return the node
1040  *              so that the calling routine can find out the unique id that AddStr
1041  *              has assigned to this string.
1042  * ----------------
1043  */
1044 static hashnode *
1045 AddStr(char *str, int strlength, int mderef)
1046 {
1047         hashnode   *temp,
1048                            *trail,
1049                            *newnode;
1050         int                     hashresult;
1051         int                     len;
1052
1053         if (++strtable_end == STRTABLESIZE)
1054         {
1055                 /* Error, string table overflow, so we Punt */
1056                 elog(FATAL,
1057                          "There are too many string constants and identifiers for the compiler to handle.");
1058
1059
1060         }
1061
1062         /*
1063          * Some of the utilites (eg, define type, create relation) assume that
1064          * the string they're passed is a NAMEDATALEN.  We get array bound
1065          * read violations from purify if we don't allocate at least
1066          * NAMEDATALEN bytes for strings of this sort.  Because we're lazy, we
1067          * allocate at least NAMEDATALEN bytes all the time.
1068          */
1069
1070         if ((len = strlength + 1) < NAMEDATALEN)
1071                 len = NAMEDATALEN;
1072
1073         strtable[strtable_end] = malloc((unsigned) len);
1074         strcpy(strtable[strtable_end], str);
1075
1076         /* Now put a node in the hash table */
1077
1078         newnode = (hashnode *) malloc(sizeof(hashnode) * 1);
1079         newnode->strnum = strtable_end;
1080         newnode->next = NULL;
1081
1082         /* Find out where it goes */
1083
1084         hashresult = CompHash(str, strlength);
1085         if (hashtable[hashresult] == NULL)
1086                 hashtable[hashresult] = newnode;
1087         else
1088         {                                                       /* There is something in the list */
1089                 trail = hashtable[hashresult];
1090                 temp = trail->next;
1091                 while (temp != NULL)
1092                 {
1093                         trail = temp;
1094                         temp = temp->next;
1095                 }
1096                 trail->next = newnode;
1097         }
1098         return newnode;
1099 }
1100
1101
1102
1103 /*
1104  *      index_register() -- record an index that has been set up for building
1105  *                                              later.
1106  *
1107  *              At bootstrap time, we define a bunch of indices on system catalogs.
1108  *              We postpone actually building the indices until just before we're
1109  *              finished with initialization, however.  This is because more classes
1110  *              and indices may be defined, and we want to be sure that all of them
1111  *              are present in the index.
1112  */
1113 void
1114 index_register(Oid heap,
1115                            Oid ind,
1116                            IndexInfo *indexInfo)
1117 {
1118         IndexList  *newind;
1119         MemoryContext oldcxt;
1120
1121         /*
1122          * XXX mao 10/31/92 -- don't gc index reldescs, associated info at
1123          * bootstrap time.      we'll declare the indices now, but want to create
1124          * them later.
1125          */
1126
1127         if (nogc == NULL)
1128                 nogc = AllocSetContextCreate((MemoryContext) NULL,
1129                                                                          "BootstrapNoGC",
1130                                                                          ALLOCSET_DEFAULT_MINSIZE,
1131                                                                          ALLOCSET_DEFAULT_INITSIZE,
1132                                                                          ALLOCSET_DEFAULT_MAXSIZE);
1133
1134         oldcxt = MemoryContextSwitchTo(nogc);
1135
1136         newind = (IndexList *) palloc(sizeof(IndexList));
1137         newind->il_heap = heap;
1138         newind->il_ind = ind;
1139         newind->il_info = (IndexInfo *) palloc(sizeof(IndexInfo));
1140
1141         memcpy(newind->il_info, indexInfo, sizeof(IndexInfo));
1142         /* predicate will likely be null, but may as well copy it */
1143         newind->il_info->ii_Predicate = (List *)
1144                 copyObject(indexInfo->ii_Predicate);
1145
1146         newind->il_next = ILHead;
1147         ILHead = newind;
1148
1149         MemoryContextSwitchTo(oldcxt);
1150 }
1151
1152 void
1153 build_indices()
1154 {
1155         for (; ILHead != (IndexList *) NULL; ILHead = ILHead->il_next)
1156         {
1157                 Relation        heap;
1158                 Relation        ind;
1159
1160                 heap = heap_open(ILHead->il_heap, NoLock);
1161                 ind = index_open(ILHead->il_ind);
1162                 index_build(heap, ind, ILHead->il_info);
1163
1164                 /*
1165                  * In normal processing mode, index_build would close the heap and
1166                  * index, but in bootstrap mode it will not.
1167                  */
1168
1169                 /*
1170                  * All of the rest of this routine is needed only because in
1171                  * bootstrap processing we don't increment xact id's.  The normal
1172                  * DefineIndex code replaces a pg_class tuple with updated info
1173                  * including the relhasindex flag (which we need to have updated).
1174                  * Unfortunately, there are always two indices defined on each
1175                  * catalog causing us to update the same pg_class tuple twice for
1176                  * each catalog getting an index during bootstrap resulting in the
1177                  * ghost tuple problem (see heap_update).       To get around this we
1178                  * change the relhasindex field ourselves in this routine keeping
1179                  * track of what catalogs we already changed so that we don't
1180                  * modify those tuples twice.  The normal mechanism for updating
1181                  * pg_class is disabled during bootstrap.
1182                  *
1183                  * -mer
1184                  */
1185                 if (!BootstrapAlreadySeen(RelationGetRelid(heap)))
1186                         UpdateStats(RelationGetRelid(heap), 0);
1187
1188                 /* XXX Probably we ought to close the heap and index here? */
1189         }
1190 }