granicus.if.org Git - postgresql/blob - src/test/regress/regress.c

   1 /*
   2  * $Header: /cvsroot/pgsql/src/test/regress/regress.c,v 1.57 2003/07/27 21:49:55 tgl Exp $
   3  */
   4
   5 #include "postgres.h"
   6
   7 #include <float.h>                              /* faked on sunos */
   8
   9 #include "utils/geo_decls.h"    /* includes <math.h> */
  10 #include "executor/executor.h"  /* For GetAttributeByName */
  11 #include "commands/sequence.h"  /* for nextval() */
  12
  13 #define P_MAXDIG 12
  14 #define LDELIM                  '('
  15 #define RDELIM                  ')'
  16 #define DELIM                   ','
  17
  18 typedef TupleTableSlot *TUPLE;
  19
  20 extern Datum regress_dist_ptpath(PG_FUNCTION_ARGS);
  21 extern Datum regress_path_dist(PG_FUNCTION_ARGS);
  22 extern PATH *poly2path(POLYGON *poly);
  23 extern Datum interpt_pp(PG_FUNCTION_ARGS);
  24 extern void regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2);
  25 extern Datum overpaid(PG_FUNCTION_ARGS);
  26 extern Datum boxarea(PG_FUNCTION_ARGS);
  27 extern char *reverse_name(char *string);
  28 extern int      oldstyle_length(int n, text *t);
  29 extern Datum int44in(PG_FUNCTION_ARGS);
  30 extern Datum int44out(PG_FUNCTION_ARGS);
  31
  32 /*
  33  * Distance from a point to a path
  34  */
  35 PG_FUNCTION_INFO_V1(regress_dist_ptpath);
  36
  37 Datum
  38 regress_dist_ptpath(PG_FUNCTION_ARGS)
  39 {
  40         Point      *pt = PG_GETARG_POINT_P(0);
  41         PATH       *path = PG_GETARG_PATH_P(1);
  42         float8          result = 0.0;   /* keep compiler quiet */
  43         float8          tmp;
  44         int                     i;
  45         LSEG            lseg;
  46
  47         switch (path->npts)
  48         {
  49                 case 0:
  50                         PG_RETURN_NULL();
  51                 case 1:
  52                         result = point_dt(pt, &path->p[0]);
  53                         break;
  54                 default:
  55
  56                         /*
  57                          * the distance from a point to a path is the smallest
  58                          * distance from the point to any of its constituent segments.
  59                          */
  60                         Assert(path->npts > 1);
  61                         for (i = 0; i < path->npts - 1; ++i)
  62                         {
  63                                 regress_lseg_construct(&lseg, &path->p[i], &path->p[i + 1]);
  64                                 tmp = DatumGetFloat8(DirectFunctionCall2(dist_ps,
  65                                                                                                           PointPGetDatum(pt),
  66                                                                                                   LsegPGetDatum(&lseg)));
  67                                 if (i == 0 || tmp < result)
  68                                         result = tmp;
  69                         }
  70                         break;
  71         }
  72         PG_RETURN_FLOAT8(result);
  73 }
  74
  75 /*
  76  * this essentially does a cartesian product of the lsegs in the
  77  * two paths, and finds the min distance between any two lsegs
  78  */
  79 PG_FUNCTION_INFO_V1(regress_path_dist);
  80
  81 Datum
  82 regress_path_dist(PG_FUNCTION_ARGS)
  83 {
  84         PATH       *p1 = PG_GETARG_PATH_P(0);
  85         PATH       *p2 = PG_GETARG_PATH_P(1);
  86         bool            have_min = false;
  87         float8          min = 0.0;              /* initialize to keep compiler quiet */
  88         float8          tmp;
  89         int                     i,
  90                                 j;
  91         LSEG            seg1,
  92                                 seg2;
  93
  94         for (i = 0; i < p1->npts - 1; i++)
  95         {
  96                 for (j = 0; j < p2->npts - 1; j++)
  97                 {
  98                         regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
  99                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
 100
 101                         tmp = DatumGetFloat8(DirectFunctionCall2(lseg_distance,
 102                                                                                                          LsegPGetDatum(&seg1),
 103                                                                                                   LsegPGetDatum(&seg2)));
 104                         if (!have_min || tmp < min)
 105                         {
 106                                 min = tmp;
 107                                 have_min = true;
 108                         }
 109                 }
 110         }
 111
 112         if (!have_min)
 113                 PG_RETURN_NULL();
 114
 115         PG_RETURN_FLOAT8(min);
 116 }
 117
 118 PATH *
 119 poly2path(POLYGON *poly)
 120 {
 121         int                     i;
 122         char       *output = (char *) palloc(2 * (P_MAXDIG + 1) * poly->npts + 64);
 123         char            buf[2 * (P_MAXDIG) + 20];
 124
 125         sprintf(output, "(1, %*d", P_MAXDIG, poly->npts);
 126
 127         for (i = 0; i < poly->npts; i++)
 128         {
 129                 snprintf(buf, sizeof(buf), ",%*g,%*g",
 130                                  P_MAXDIG, poly->p[i].x, P_MAXDIG, poly->p[i].y);
 131                 strcat(output, buf);
 132         }
 133
 134         snprintf(buf, sizeof(buf), "%c", RDELIM);
 135         strcat(output, buf);
 136         return DatumGetPathP(DirectFunctionCall1(path_in,
 137                                                                                          CStringGetDatum(output)));
 138 }
 139
 140 /* return the point where two paths intersect, or NULL if no intersection. */
 141 PG_FUNCTION_INFO_V1(interpt_pp);
 142
 143 Datum
 144 interpt_pp(PG_FUNCTION_ARGS)
 145 {
 146         PATH       *p1 = PG_GETARG_PATH_P(0);
 147         PATH       *p2 = PG_GETARG_PATH_P(1);
 148         int                     i,
 149                                 j;
 150         LSEG            seg1,
 151                                 seg2;
 152         bool            found;                  /* We've found the intersection */
 153
 154         found = false;                          /* Haven't found it yet */
 155
 156         for (i = 0; i < p1->npts - 1 && !found; i++)
 157         {
 158                 regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
 159                 for (j = 0; j < p2->npts - 1 && !found; j++)
 160                 {
 161                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
 162                         if (DatumGetBool(DirectFunctionCall2(lseg_intersect,
 163                                                                                                  LsegPGetDatum(&seg1),
 164                                                                                                  LsegPGetDatum(&seg2))))
 165                                 found = true;
 166                 }
 167         }
 168
 169         if (!found)
 170                 PG_RETURN_NULL();
 171
 172         /*
 173          * Note: DirectFunctionCall2 will kick out an error if lseg_interpt()
 174          * returns NULL, but that should be impossible since we know the two
 175          * segments intersect.
 176          */
 177         PG_RETURN_DATUM(DirectFunctionCall2(lseg_interpt,
 178                                                                                 LsegPGetDatum(&seg1),
 179                                                                                 LsegPGetDatum(&seg2)));
 180 }
 181
 182
 183 /* like lseg_construct, but assume space already allocated */
 184 void
 185 regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2)
 186 {
 187         lseg->p[0].x = pt1->x;
 188         lseg->p[0].y = pt1->y;
 189         lseg->p[1].x = pt2->x;
 190         lseg->p[1].y = pt2->y;
 191         lseg->m = point_sl(pt1, pt2);
 192 }
 193
 194 PG_FUNCTION_INFO_V1(overpaid);
 195
 196 Datum
 197 overpaid(PG_FUNCTION_ARGS)
 198 {
 199         TUPLE           tuple = (TUPLE) PG_GETARG_POINTER(0);
 200         bool            isnull;
 201         int32           salary;
 202
 203         salary = DatumGetInt32(GetAttributeByName(tuple, "salary", &isnull));
 204         if (isnull)
 205                 PG_RETURN_NULL();
 206         PG_RETURN_BOOL(salary > 699);
 207 }
 208
 209 /* New type "widget"
 210  * This used to be "circle", but I added circle to builtins,
 211  *      so needed to make sure the names do not collide. - tgl 97/04/21
 212  */
 213
 214 typedef struct
 215 {
 216         Point           center;
 217         double          radius;
 218 }       WIDGET;
 219
 220 WIDGET     *widget_in(char *str);
 221 char       *widget_out(WIDGET *widget);
 222 extern Datum pt_in_widget(PG_FUNCTION_ARGS);
 223
 224 #define NARGS   3
 225
 226 WIDGET *
 227 widget_in(char *str)
 228 {
 229         char       *p,
 230                            *coord[NARGS],
 231                                 buf2[1000];
 232         int                     i;
 233         WIDGET     *result;
 234
 235         if (str == NULL)
 236                 return NULL;
 237         for (i = 0, p = str; *p && i < NARGS && *p != RDELIM; p++)
 238                 if (*p == ',' || (*p == LDELIM && !i))
 239                         coord[i++] = p + 1;
 240         if (i < NARGS - 1)
 241                 return NULL;
 242         result = (WIDGET *) palloc(sizeof(WIDGET));
 243         result->center.x = atof(coord[0]);
 244         result->center.y = atof(coord[1]);
 245         result->radius = atof(coord[2]);
 246
 247         snprintf(buf2, sizeof(buf2), "widget_in: read (%f, %f, %f)\n",
 248                          result->center.x, result->center.y, result->radius);
 249         return result;
 250 }
 251
 252 char *
 253 widget_out(WIDGET *widget)
 254 {
 255         char       *result;
 256
 257         if (widget == NULL)
 258                 return NULL;
 259
 260         result = (char *) palloc(60);
 261         sprintf(result, "(%g,%g,%g)",
 262                         widget->center.x, widget->center.y, widget->radius);
 263         return result;
 264 }
 265
 266 PG_FUNCTION_INFO_V1(pt_in_widget);
 267
 268 Datum
 269 pt_in_widget(PG_FUNCTION_ARGS)
 270 {
 271         Point      *point = PG_GETARG_POINT_P(0);
 272         WIDGET     *widget = (WIDGET *) PG_GETARG_POINTER(1);
 273
 274         PG_RETURN_BOOL(point_dt(point, &widget->center) < widget->radius);
 275 }
 276
 277 #define ABS(X) ((X) >= 0 ? (X) : -(X))
 278
 279 PG_FUNCTION_INFO_V1(boxarea);
 280
 281 Datum
 282 boxarea(PG_FUNCTION_ARGS)
 283 {
 284         BOX                *box = PG_GETARG_BOX_P(0);
 285         double          width,
 286                                 height;
 287
 288         width = ABS(box->high.x - box->low.x);
 289         height = ABS(box->high.y - box->low.y);
 290         PG_RETURN_FLOAT8(width * height);
 291 }
 292
 293 char *
 294 reverse_name(char *string)
 295 {
 296         int                     i;
 297         int                     len;
 298         char       *new_string;
 299
 300         new_string = palloc0(NAMEDATALEN);
 301         for (i = 0; i < NAMEDATALEN && string[i]; ++i)
 302                 ;
 303         if (i == NAMEDATALEN || !string[i])
 304                 --i;
 305         len = i;
 306         for (; i >= 0; --i)
 307                 new_string[len - i] = string[i];
 308         return new_string;
 309 }
 310
 311 /*
 312  * This rather silly function is just to test that oldstyle functions
 313  * work correctly on toast-able inputs.
 314  */
 315 int
 316 oldstyle_length(int n, text *t)
 317 {
 318         int                     len = 0;
 319
 320         if (t)
 321                 len = VARSIZE(t) - VARHDRSZ;
 322
 323         return n + len;
 324 }
 325
 326 #include "executor/spi.h"               /* this is what you need to work with SPI */
 327 #include "commands/trigger.h"   /* -"- and triggers */
 328
 329 static TransactionId fd17b_xid = InvalidTransactionId;
 330 static TransactionId fd17a_xid = InvalidTransactionId;
 331 static int      fd17b_level = 0;
 332 static int      fd17a_level = 0;
 333 static bool fd17b_recursion = true;
 334 static bool fd17a_recursion = true;
 335 extern Datum funny_dup17(PG_FUNCTION_ARGS);
 336
 337 PG_FUNCTION_INFO_V1(funny_dup17);
 338
 339 Datum
 340 funny_dup17(PG_FUNCTION_ARGS)
 341 {
 342         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 343         TransactionId *xid;
 344         int                *level;
 345         bool       *recursion;
 346         Relation        rel;
 347         TupleDesc       tupdesc;
 348         HeapTuple       tuple;
 349         char       *query,
 350                            *fieldval,
 351                            *fieldtype;
 352         char       *when;
 353         int                     inserted;
 354         int                     selected = 0;
 355         int                     ret;
 356
 357         if (!CALLED_AS_TRIGGER(fcinfo))
 358                 elog(ERROR, "funny_dup17: not fired by trigger manager");
 359
 360         tuple = trigdata->tg_trigtuple;
 361         rel = trigdata->tg_relation;
 362         tupdesc = rel->rd_att;
 363         if (TRIGGER_FIRED_BEFORE(trigdata->tg_event))
 364         {
 365                 xid = &fd17b_xid;
 366                 level = &fd17b_level;
 367                 recursion = &fd17b_recursion;
 368                 when = "BEFORE";
 369         }
 370         else
 371         {
 372                 xid = &fd17a_xid;
 373                 level = &fd17a_level;
 374                 recursion = &fd17a_recursion;
 375                 when = "AFTER ";
 376         }
 377
 378         if (!TransactionIdIsCurrentTransactionId(*xid))
 379         {
 380                 *xid = GetCurrentTransactionId();
 381                 *level = 0;
 382                 *recursion = true;
 383         }
 384
 385         if (*level == 17)
 386         {
 387                 *recursion = false;
 388                 return PointerGetDatum(tuple);
 389         }
 390
 391         if (!(*recursion))
 392                 return PointerGetDatum(tuple);
 393
 394         (*level)++;
 395
 396         SPI_connect();
 397
 398         fieldval = SPI_getvalue(tuple, tupdesc, 1);
 399         fieldtype = SPI_gettype(tupdesc, 1);
 400
 401         query = (char *) palloc(100 + NAMEDATALEN * 3 +
 402                                                         strlen(fieldval) + strlen(fieldtype));
 403
 404         sprintf(query, "insert into %s select * from %s where %s = '%s'::%s",
 405                         SPI_getrelname(rel), SPI_getrelname(rel),
 406                         SPI_fname(tupdesc, 1),
 407                         fieldval, fieldtype);
 408
 409         if ((ret = SPI_exec(query, 0)) < 0)
 410                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (insert ...) returned %d",
 411                          when, *level, ret);
 412
 413         inserted = SPI_processed;
 414
 415         sprintf(query, "select count (*) from %s where %s = '%s'::%s",
 416                         SPI_getrelname(rel),
 417                         SPI_fname(tupdesc, 1),
 418                         fieldval, fieldtype);
 419
 420         if ((ret = SPI_exec(query, 0)) < 0)
 421                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (select ...) returned %d",
 422                          when, *level, ret);
 423
 424         if (SPI_processed > 0)
 425         {
 426                 selected = DatumGetInt32(DirectFunctionCall1(int4in,
 427                                                                                         CStringGetDatum(SPI_getvalue(
 428                                                                                                    SPI_tuptable->vals[0],
 429                                                                                                    SPI_tuptable->tupdesc,
 430                                                                                                                                                  1
 431                                                                                                                                         ))));
 432         }
 433
 434         elog(DEBUG4, "funny_dup17 (fired %s) on level %3d: %d/%d tuples inserted/selected",
 435                  when, *level, inserted, selected);
 436
 437         SPI_finish();
 438
 439         (*level)--;
 440
 441         if (*level == 0)
 442                 *xid = InvalidTransactionId;
 443
 444         return PointerGetDatum(tuple);
 445 }
 446
 447 extern Datum ttdummy(PG_FUNCTION_ARGS);
 448 extern Datum set_ttdummy(PG_FUNCTION_ARGS);
 449
 450 #define TTDUMMY_INFINITY        999999
 451
 452 static void *splan = NULL;
 453 static bool ttoff = false;
 454
 455 PG_FUNCTION_INFO_V1(ttdummy);
 456
 457 Datum
 458 ttdummy(PG_FUNCTION_ARGS)
 459 {
 460         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 461         Trigger    *trigger;            /* to get trigger name */
 462         char      **args;                       /* arguments */
 463         int                     attnum[2];              /* fnumbers of start/stop columns */
 464         Datum           oldon,
 465                                 oldoff;
 466         Datum           newon,
 467                                 newoff;
 468         Datum      *cvals;                      /* column values */
 469         char       *cnulls;                     /* column nulls */
 470         char       *relname;            /* triggered relation name */
 471         Relation        rel;                    /* triggered relation */
 472         HeapTuple       trigtuple;
 473         HeapTuple       newtuple = NULL;
 474         HeapTuple       rettuple;
 475         TupleDesc       tupdesc;                /* tuple description */
 476         int                     natts;                  /* # of attributes */
 477         bool            isnull;                 /* to know is some column NULL or not */
 478         int                     ret;
 479         int                     i;
 480
 481         if (!CALLED_AS_TRIGGER(fcinfo))
 482                 elog(ERROR, "ttdummy: not fired by trigger manager");
 483         if (TRIGGER_FIRED_FOR_STATEMENT(trigdata->tg_event))
 484                 elog(ERROR, "ttdummy: can't process STATEMENT events");
 485         if (TRIGGER_FIRED_AFTER(trigdata->tg_event))
 486                 elog(ERROR, "ttdummy: must be fired before event");
 487         if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
 488                 elog(ERROR, "ttdummy: can't process INSERT event");
 489         if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
 490                 newtuple = trigdata->tg_newtuple;
 491
 492         trigtuple = trigdata->tg_trigtuple;
 493
 494         rel = trigdata->tg_relation;
 495         relname = SPI_getrelname(rel);
 496
 497         /* check if TT is OFF for this relation */
 498         if (ttoff)                                      /* OFF - nothing to do */
 499         {
 500                 pfree(relname);
 501                 return PointerGetDatum((newtuple != NULL) ? newtuple : trigtuple);
 502         }
 503
 504         trigger = trigdata->tg_trigger;
 505
 506         if (trigger->tgnargs != 2)
 507                 elog(ERROR, "ttdummy (%s): invalid (!= 2) number of arguments %d",
 508                          relname, trigger->tgnargs);
 509
 510         args = trigger->tgargs;
 511         tupdesc = rel->rd_att;
 512         natts = tupdesc->natts;
 513
 514         for (i = 0; i < 2; i++)
 515         {
 516                 attnum[i] = SPI_fnumber(tupdesc, args[i]);
 517                 if (attnum[i] < 0)
 518                         elog(ERROR, "ttdummy (%s): there is no attribute %s", relname, args[i]);
 519                 if (SPI_gettypeid(tupdesc, attnum[i]) != INT4OID)
 520                         elog(ERROR, "ttdummy (%s): attributes %s and %s must be of abstime type",
 521                                  relname, args[0], args[1]);
 522         }
 523
 524         oldon = SPI_getbinval(trigtuple, tupdesc, attnum[0], &isnull);
 525         if (isnull)
 526                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 527
 528         oldoff = SPI_getbinval(trigtuple, tupdesc, attnum[1], &isnull);
 529         if (isnull)
 530                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 531
 532         if (newtuple != NULL)           /* UPDATE */
 533         {
 534                 newon = SPI_getbinval(newtuple, tupdesc, attnum[0], &isnull);
 535                 if (isnull)
 536                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 537                 newoff = SPI_getbinval(newtuple, tupdesc, attnum[1], &isnull);
 538                 if (isnull)
 539                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 540
 541                 if (oldon != newon || oldoff != newoff)
 542                         elog(ERROR, "ttdummy (%s): you can't change %s and/or %s columns (use set_ttdummy)",
 543                                  relname, args[0], args[1]);
 544
 545                 if (newoff != TTDUMMY_INFINITY)
 546                 {
 547                         pfree(relname);         /* allocated in upper executor context */
 548                         return PointerGetDatum(NULL);
 549                 }
 550         }
 551         else if (oldoff != TTDUMMY_INFINITY)            /* DELETE */
 552         {
 553                 pfree(relname);
 554                 return PointerGetDatum(NULL);
 555         }
 556
 557         {
 558                 text       *seqname = DatumGetTextP(DirectFunctionCall1(textin,
 559                                                                                 CStringGetDatum("ttdummy_seq")));
 560
 561                 newoff = DirectFunctionCall1(nextval,
 562                                                                          PointerGetDatum(seqname));
 563                 /* nextval now returns int64; coerce down to int32 */
 564                 newoff = Int32GetDatum((int32) DatumGetInt64(newoff));
 565                 pfree(seqname);
 566         }
 567
 568         /* Connect to SPI manager */
 569         if ((ret = SPI_connect()) < 0)
 570                 elog(ERROR, "ttdummy (%s): SPI_connect returned %d", relname, ret);
 571
 572         /* Fetch tuple values and nulls */
 573         cvals = (Datum *) palloc(natts * sizeof(Datum));
 574         cnulls = (char *) palloc(natts * sizeof(char));
 575         for (i = 0; i < natts; i++)
 576         {
 577                 cvals[i] = SPI_getbinval((newtuple != NULL) ? newtuple : trigtuple,
 578                                                                  tupdesc, i + 1, &isnull);
 579                 cnulls[i] = (isnull) ? 'n' : ' ';
 580         }
 581
 582         /* change date column(s) */
 583         if (newtuple)                           /* UPDATE */
 584         {
 585                 cvals[attnum[0] - 1] = newoff;  /* start_date eq current date */
 586                 cnulls[attnum[0] - 1] = ' ';
 587                 cvals[attnum[1] - 1] = TTDUMMY_INFINITY;                /* stop_date eq INFINITY */
 588                 cnulls[attnum[1] - 1] = ' ';
 589         }
 590         else
 591 /* DELETE */
 592         {
 593                 cvals[attnum[1] - 1] = newoff;  /* stop_date eq current date */
 594                 cnulls[attnum[1] - 1] = ' ';
 595         }
 596
 597         /* if there is no plan ... */
 598         if (splan == NULL)
 599         {
 600                 void       *pplan;
 601                 Oid                *ctypes;
 602                 char       *query;
 603
 604                 /* allocate space in preparation */
 605                 ctypes = (Oid *) palloc(natts * sizeof(Oid));
 606                 query = (char *) palloc(100 + 16 * natts);
 607
 608                 /*
 609                  * Construct query: INSERT INTO _relation_ VALUES ($1, ...)
 610                  */
 611                 sprintf(query, "INSERT INTO %s VALUES (", relname);
 612                 for (i = 1; i <= natts; i++)
 613                 {
 614                         sprintf(query + strlen(query), "$%d%s",
 615                                         i, (i < natts) ? ", " : ")");
 616                         ctypes[i - 1] = SPI_gettypeid(tupdesc, i);
 617                 }
 618
 619                 /* Prepare plan for query */
 620                 pplan = SPI_prepare(query, natts, ctypes);
 621                 if (pplan == NULL)
 622                         elog(ERROR, "ttdummy (%s): SPI_prepare returned %d", relname, SPI_result);
 623
 624                 pplan = SPI_saveplan(pplan);
 625                 if (pplan == NULL)
 626                         elog(ERROR, "ttdummy (%s): SPI_saveplan returned %d", relname, SPI_result);
 627
 628                 splan = pplan;
 629         }
 630
 631         ret = SPI_execp(splan, cvals, cnulls, 0);
 632
 633         if (ret < 0)
 634                 elog(ERROR, "ttdummy (%s): SPI_execp returned %d", relname, ret);
 635
 636         /* Tuple to return to upper Executor ... */
 637         if (newtuple)                           /* UPDATE */
 638         {
 639                 HeapTuple       tmptuple;
 640
 641                 tmptuple = SPI_copytuple(trigtuple);
 642                 rettuple = SPI_modifytuple(rel, tmptuple, 1, &(attnum[1]), &newoff, NULL);
 643                 SPI_freetuple(tmptuple);
 644         }
 645         else
 646 /* DELETE */
 647                 rettuple = trigtuple;
 648
 649         SPI_finish();                           /* don't forget say Bye to SPI mgr */
 650
 651         pfree(relname);
 652
 653         return PointerGetDatum(rettuple);
 654 }
 655
 656 PG_FUNCTION_INFO_V1(set_ttdummy);
 657
 658 Datum
 659 set_ttdummy(PG_FUNCTION_ARGS)
 660 {
 661         int32           on = PG_GETARG_INT32(0);
 662
 663         if (ttoff)                                      /* OFF currently */
 664         {
 665                 if (on == 0)
 666                         PG_RETURN_INT32(0);
 667
 668                 /* turn ON */
 669                 ttoff = false;
 670                 PG_RETURN_INT32(0);
 671         }
 672
 673         /* ON currently */
 674         if (on != 0)
 675                 PG_RETURN_INT32(1);
 676
 677         /* turn OFF */
 678         ttoff = true;
 679
 680         PG_RETURN_INT32(1);
 681 }
 682
 683
 684 /*
 685  * Type int44 has no real-world use, but the regression tests use it.
 686  * It's a four-element vector of int4's.
 687  */
 688
 689 /*
 690  *              int44in                 - converts "num num ..." to internal form
 691  *
 692  *              Note: Fills any missing positions with zeroes.
 693  */
 694 PG_FUNCTION_INFO_V1(int44in);
 695
 696 Datum
 697 int44in(PG_FUNCTION_ARGS)
 698 {
 699         char       *input_string = PG_GETARG_CSTRING(0);
 700         int32      *result = (int32 *) palloc(4 * sizeof(int32));
 701         int                     i;
 702
 703         i = sscanf(input_string,
 704                            "%d, %d, %d, %d",
 705                            &result[0],
 706                            &result[1],
 707                            &result[2],
 708                            &result[3]);
 709         while (i < 4)
 710                 result[i++] = 0;
 711
 712         PG_RETURN_POINTER(result);
 713 }
 714
 715 /*
 716  *              int44out                - converts internal form to "num num ..."
 717  */
 718 PG_FUNCTION_INFO_V1(int44out);
 719
 720 Datum
 721 int44out(PG_FUNCTION_ARGS)
 722 {
 723         int32      *an_array = (int32 *) PG_GETARG_POINTER(0);
 724         char       *result = (char *) palloc(16 * 4);           /* Allow 14 digits +
 725                                                                                                                  * sign */
 726         int                     i;
 727         char       *walk;
 728
 729         walk = result;
 730         for (i = 0; i < 4; i++)
 731         {
 732                 pg_ltoa(an_array[i], walk);
 733                 while (*++walk != '\0')
 734                         ;
 735                 *walk++ = ' ';
 736         }
 737         *--walk = '\0';
 738         PG_RETURN_CSTRING(result);
 739 }