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

   1 /*
   2  * $PostgreSQL: pgsql/src/test/regress/regress.c,v 1.61 2004/10/07 15:21:58 momjian 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 extern Datum regress_dist_ptpath(PG_FUNCTION_ARGS);
  19 extern Datum regress_path_dist(PG_FUNCTION_ARGS);
  20 extern PATH *poly2path(POLYGON *poly);
  21 extern Datum interpt_pp(PG_FUNCTION_ARGS);
  22 extern void regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2);
  23 extern Datum overpaid(PG_FUNCTION_ARGS);
  24 extern Datum boxarea(PG_FUNCTION_ARGS);
  25 extern char *reverse_name(char *string);
  26 extern int      oldstyle_length(int n, text *t);
  27 extern Datum int44in(PG_FUNCTION_ARGS);
  28 extern Datum int44out(PG_FUNCTION_ARGS);
  29
  30 /*
  31  * Distance from a point to a path
  32  */
  33 PG_FUNCTION_INFO_V1(regress_dist_ptpath);
  34
  35 Datum
  36 regress_dist_ptpath(PG_FUNCTION_ARGS)
  37 {
  38         Point      *pt = PG_GETARG_POINT_P(0);
  39         PATH       *path = PG_GETARG_PATH_P(1);
  40         float8          result = 0.0;   /* keep compiler quiet */
  41         float8          tmp;
  42         int                     i;
  43         LSEG            lseg;
  44
  45         switch (path->npts)
  46         {
  47                 case 0:
  48                         PG_RETURN_NULL();
  49                 case 1:
  50                         result = point_dt(pt, &path->p[0]);
  51                         break;
  52                 default:
  53
  54                         /*
  55                          * the distance from a point to a path is the smallest
  56                          * distance from the point to any of its constituent segments.
  57                          */
  58                         Assert(path->npts > 1);
  59                         for (i = 0; i < path->npts - 1; ++i)
  60                         {
  61                                 regress_lseg_construct(&lseg, &path->p[i], &path->p[i + 1]);
  62                                 tmp = DatumGetFloat8(DirectFunctionCall2(dist_ps,
  63                                                                                                           PointPGetDatum(pt),
  64                                                                                                   LsegPGetDatum(&lseg)));
  65                                 if (i == 0 || tmp < result)
  66                                         result = tmp;
  67                         }
  68                         break;
  69         }
  70         PG_RETURN_FLOAT8(result);
  71 }
  72
  73 /*
  74  * this essentially does a cartesian product of the lsegs in the
  75  * two paths, and finds the min distance between any two lsegs
  76  */
  77 PG_FUNCTION_INFO_V1(regress_path_dist);
  78
  79 Datum
  80 regress_path_dist(PG_FUNCTION_ARGS)
  81 {
  82         PATH       *p1 = PG_GETARG_PATH_P(0);
  83         PATH       *p2 = PG_GETARG_PATH_P(1);
  84         bool            have_min = false;
  85         float8          min = 0.0;              /* initialize to keep compiler quiet */
  86         float8          tmp;
  87         int                     i,
  88                                 j;
  89         LSEG            seg1,
  90                                 seg2;
  91
  92         for (i = 0; i < p1->npts - 1; i++)
  93         {
  94                 for (j = 0; j < p2->npts - 1; j++)
  95                 {
  96                         regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
  97                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
  98
  99                         tmp = DatumGetFloat8(DirectFunctionCall2(lseg_distance,
 100                                                                                                          LsegPGetDatum(&seg1),
 101                                                                                                   LsegPGetDatum(&seg2)));
 102                         if (!have_min || tmp < min)
 103                         {
 104                                 min = tmp;
 105                                 have_min = true;
 106                         }
 107                 }
 108         }
 109
 110         if (!have_min)
 111                 PG_RETURN_NULL();
 112
 113         PG_RETURN_FLOAT8(min);
 114 }
 115
 116 PATH *
 117 poly2path(POLYGON *poly)
 118 {
 119         int                     i;
 120         char       *output = (char *) palloc(2 * (P_MAXDIG + 1) * poly->npts + 64);
 121         char            buf[2 * (P_MAXDIG) + 20];
 122
 123         sprintf(output, "(1, %*d", P_MAXDIG, poly->npts);
 124
 125         for (i = 0; i < poly->npts; i++)
 126         {
 127                 snprintf(buf, sizeof(buf), ",%*g,%*g",
 128                                  P_MAXDIG, poly->p[i].x, P_MAXDIG, poly->p[i].y);
 129                 strcat(output, buf);
 130         }
 131
 132         snprintf(buf, sizeof(buf), "%c", RDELIM);
 133         strcat(output, buf);
 134         return DatumGetPathP(DirectFunctionCall1(path_in,
 135                                                                                          CStringGetDatum(output)));
 136 }
 137
 138 /* return the point where two paths intersect, or NULL if no intersection. */
 139 PG_FUNCTION_INFO_V1(interpt_pp);
 140
 141 Datum
 142 interpt_pp(PG_FUNCTION_ARGS)
 143 {
 144         PATH       *p1 = PG_GETARG_PATH_P(0);
 145         PATH       *p2 = PG_GETARG_PATH_P(1);
 146         int                     i,
 147                                 j;
 148         LSEG            seg1,
 149                                 seg2;
 150         bool            found;                  /* We've found the intersection */
 151
 152         found = false;                          /* Haven't found it yet */
 153
 154         for (i = 0; i < p1->npts - 1 && !found; i++)
 155         {
 156                 regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
 157                 for (j = 0; j < p2->npts - 1 && !found; j++)
 158                 {
 159                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
 160                         if (DatumGetBool(DirectFunctionCall2(lseg_intersect,
 161                                                                                                  LsegPGetDatum(&seg1),
 162                                                                                                  LsegPGetDatum(&seg2))))
 163                                 found = true;
 164                 }
 165         }
 166
 167         if (!found)
 168                 PG_RETURN_NULL();
 169
 170         /*
 171          * Note: DirectFunctionCall2 will kick out an error if lseg_interpt()
 172          * returns NULL, but that should be impossible since we know the two
 173          * segments intersect.
 174          */
 175         PG_RETURN_DATUM(DirectFunctionCall2(lseg_interpt,
 176                                                                                 LsegPGetDatum(&seg1),
 177                                                                                 LsegPGetDatum(&seg2)));
 178 }
 179
 180
 181 /* like lseg_construct, but assume space already allocated */
 182 void
 183 regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2)
 184 {
 185         lseg->p[0].x = pt1->x;
 186         lseg->p[0].y = pt1->y;
 187         lseg->p[1].x = pt2->x;
 188         lseg->p[1].y = pt2->y;
 189         lseg->m = point_sl(pt1, pt2);
 190 }
 191
 192 PG_FUNCTION_INFO_V1(overpaid);
 193
 194 Datum
 195 overpaid(PG_FUNCTION_ARGS)
 196 {
 197         HeapTupleHeader tuple = PG_GETARG_HEAPTUPLEHEADER(0);
 198         bool            isnull;
 199         int32           salary;
 200
 201         salary = DatumGetInt32(GetAttributeByName(tuple, "salary", &isnull));
 202         if (isnull)
 203                 PG_RETURN_NULL();
 204         PG_RETURN_BOOL(salary > 699);
 205 }
 206
 207 /* New type "widget"
 208  * This used to be "circle", but I added circle to builtins,
 209  *      so needed to make sure the names do not collide. - tgl 97/04/21
 210  */
 211
 212 typedef struct
 213 {
 214         Point           center;
 215         double          radius;
 216 }       WIDGET;
 217
 218 WIDGET     *widget_in(char *str);
 219 char       *widget_out(WIDGET * widget);
 220 extern Datum pt_in_widget(PG_FUNCTION_ARGS);
 221
 222 #define NARGS   3
 223
 224 WIDGET *
 225 widget_in(char *str)
 226 {
 227         char       *p,
 228                            *coord[NARGS],
 229                                 buf2[1000];
 230         int                     i;
 231         WIDGET     *result;
 232
 233         if (str == NULL)
 234                 return NULL;
 235         for (i = 0, p = str; *p && i < NARGS && *p != RDELIM; p++)
 236                 if (*p == ',' || (*p == LDELIM && !i))
 237                         coord[i++] = p + 1;
 238         if (i < NARGS - 1)
 239                 return NULL;
 240         result = (WIDGET *) palloc(sizeof(WIDGET));
 241         result->center.x = atof(coord[0]);
 242         result->center.y = atof(coord[1]);
 243         result->radius = atof(coord[2]);
 244
 245         snprintf(buf2, sizeof(buf2), "widget_in: read (%f, %f, %f)\n",
 246                          result->center.x, result->center.y, result->radius);
 247         return result;
 248 }
 249
 250 char *
 251 widget_out(WIDGET * widget)
 252 {
 253         char       *result;
 254
 255         if (widget == NULL)
 256                 return NULL;
 257
 258         result = (char *) palloc(60);
 259         sprintf(result, "(%g,%g,%g)",
 260                         widget->center.x, widget->center.y, widget->radius);
 261         return result;
 262 }
 263
 264 PG_FUNCTION_INFO_V1(pt_in_widget);
 265
 266 Datum
 267 pt_in_widget(PG_FUNCTION_ARGS)
 268 {
 269         Point      *point = PG_GETARG_POINT_P(0);
 270         WIDGET     *widget = (WIDGET *) PG_GETARG_POINTER(1);
 271
 272         PG_RETURN_BOOL(point_dt(point, &widget->center) < widget->radius);
 273 }
 274
 275 #define ABS(X) ((X) >= 0 ? (X) : -(X))
 276
 277 PG_FUNCTION_INFO_V1(boxarea);
 278
 279 Datum
 280 boxarea(PG_FUNCTION_ARGS)
 281 {
 282         BOX                *box = PG_GETARG_BOX_P(0);
 283         double          width,
 284                                 height;
 285
 286         width = ABS(box->high.x - box->low.x);
 287         height = ABS(box->high.y - box->low.y);
 288         PG_RETURN_FLOAT8(width * height);
 289 }
 290
 291 char *
 292 reverse_name(char *string)
 293 {
 294         int                     i;
 295         int                     len;
 296         char       *new_string;
 297
 298         new_string = palloc0(NAMEDATALEN);
 299         for (i = 0; i < NAMEDATALEN && string[i]; ++i)
 300                 ;
 301         if (i == NAMEDATALEN || !string[i])
 302                 --i;
 303         len = i;
 304         for (; i >= 0; --i)
 305                 new_string[len - i] = string[i];
 306         return new_string;
 307 }
 308
 309 /*
 310  * This rather silly function is just to test that oldstyle functions
 311  * work correctly on toast-able inputs.
 312  */
 313 int
 314 oldstyle_length(int n, text *t)
 315 {
 316         int                     len = 0;
 317
 318         if (t)
 319                 len = VARSIZE(t) - VARHDRSZ;
 320
 321         return n + len;
 322 }
 323
 324 #include "executor/spi.h"               /* this is what you need to work with SPI */
 325 #include "commands/trigger.h"   /* -"- and triggers */
 326
 327 static TransactionId fd17b_xid = InvalidTransactionId;
 328 static TransactionId fd17a_xid = InvalidTransactionId;
 329 static int      fd17b_level = 0;
 330 static int      fd17a_level = 0;
 331 static bool fd17b_recursion = true;
 332 static bool fd17a_recursion = true;
 333 extern Datum funny_dup17(PG_FUNCTION_ARGS);
 334
 335 PG_FUNCTION_INFO_V1(funny_dup17);
 336
 337 Datum
 338 funny_dup17(PG_FUNCTION_ARGS)
 339 {
 340         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 341         TransactionId *xid;
 342         int                *level;
 343         bool       *recursion;
 344         Relation        rel;
 345         TupleDesc       tupdesc;
 346         HeapTuple       tuple;
 347         char       *query,
 348                            *fieldval,
 349                            *fieldtype;
 350         char       *when;
 351         int                     inserted;
 352         int                     selected = 0;
 353         int                     ret;
 354
 355         if (!CALLED_AS_TRIGGER(fcinfo))
 356                 elog(ERROR, "funny_dup17: not fired by trigger manager");
 357
 358         tuple = trigdata->tg_trigtuple;
 359         rel = trigdata->tg_relation;
 360         tupdesc = rel->rd_att;
 361         if (TRIGGER_FIRED_BEFORE(trigdata->tg_event))
 362         {
 363                 xid = &fd17b_xid;
 364                 level = &fd17b_level;
 365                 recursion = &fd17b_recursion;
 366                 when = "BEFORE";
 367         }
 368         else
 369         {
 370                 xid = &fd17a_xid;
 371                 level = &fd17a_level;
 372                 recursion = &fd17a_recursion;
 373                 when = "AFTER ";
 374         }
 375
 376         if (!TransactionIdIsCurrentTransactionId(*xid))
 377         {
 378                 *xid = GetCurrentTransactionId();
 379                 *level = 0;
 380                 *recursion = true;
 381         }
 382
 383         if (*level == 17)
 384         {
 385                 *recursion = false;
 386                 return PointerGetDatum(tuple);
 387         }
 388
 389         if (!(*recursion))
 390                 return PointerGetDatum(tuple);
 391
 392         (*level)++;
 393
 394         SPI_connect();
 395
 396         fieldval = SPI_getvalue(tuple, tupdesc, 1);
 397         fieldtype = SPI_gettype(tupdesc, 1);
 398
 399         query = (char *) palloc(100 + NAMEDATALEN * 3 +
 400                                                         strlen(fieldval) + strlen(fieldtype));
 401
 402         sprintf(query, "insert into %s select * from %s where %s = '%s'::%s",
 403                         SPI_getrelname(rel), SPI_getrelname(rel),
 404                         SPI_fname(tupdesc, 1),
 405                         fieldval, fieldtype);
 406
 407         if ((ret = SPI_exec(query, 0)) < 0)
 408                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (insert ...) returned %d",
 409                          when, *level, ret);
 410
 411         inserted = SPI_processed;
 412
 413         sprintf(query, "select count (*) from %s where %s = '%s'::%s",
 414                         SPI_getrelname(rel),
 415                         SPI_fname(tupdesc, 1),
 416                         fieldval, fieldtype);
 417
 418         if ((ret = SPI_exec(query, 0)) < 0)
 419                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (select ...) returned %d",
 420                          when, *level, ret);
 421
 422         if (SPI_processed > 0)
 423         {
 424                 selected = DatumGetInt32(DirectFunctionCall1(int4in,
 425                                                                                         CStringGetDatum(SPI_getvalue(
 426                                                                                                    SPI_tuptable->vals[0],
 427                                                                                                    SPI_tuptable->tupdesc,
 428                                                                                                                                                  1
 429                                                                                                                                         ))));
 430         }
 431
 432         elog(DEBUG4, "funny_dup17 (fired %s) on level %3d: %d/%d tuples inserted/selected",
 433                  when, *level, inserted, selected);
 434
 435         SPI_finish();
 436
 437         (*level)--;
 438
 439         if (*level == 0)
 440                 *xid = InvalidTransactionId;
 441
 442         return PointerGetDatum(tuple);
 443 }
 444
 445 extern Datum ttdummy(PG_FUNCTION_ARGS);
 446 extern Datum set_ttdummy(PG_FUNCTION_ARGS);
 447
 448 #define TTDUMMY_INFINITY        999999
 449
 450 static void *splan = NULL;
 451 static bool ttoff = false;
 452
 453 PG_FUNCTION_INFO_V1(ttdummy);
 454
 455 Datum
 456 ttdummy(PG_FUNCTION_ARGS)
 457 {
 458         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 459         Trigger    *trigger;            /* to get trigger name */
 460         char      **args;                       /* arguments */
 461         int                     attnum[2];              /* fnumbers of start/stop columns */
 462         Datum           oldon,
 463                                 oldoff;
 464         Datum           newon,
 465                                 newoff;
 466         Datum      *cvals;                      /* column values */
 467         char       *cnulls;                     /* column nulls */
 468         char       *relname;            /* triggered relation name */
 469         Relation        rel;                    /* triggered relation */
 470         HeapTuple       trigtuple;
 471         HeapTuple       newtuple = NULL;
 472         HeapTuple       rettuple;
 473         TupleDesc       tupdesc;                /* tuple description */
 474         int                     natts;                  /* # of attributes */
 475         bool            isnull;                 /* to know is some column NULL or not */
 476         int                     ret;
 477         int                     i;
 478
 479         if (!CALLED_AS_TRIGGER(fcinfo))
 480                 elog(ERROR, "ttdummy: not fired by trigger manager");
 481         if (TRIGGER_FIRED_FOR_STATEMENT(trigdata->tg_event))
 482                 elog(ERROR, "ttdummy: can't process STATEMENT events");
 483         if (TRIGGER_FIRED_AFTER(trigdata->tg_event))
 484                 elog(ERROR, "ttdummy: must be fired before event");
 485         if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
 486                 elog(ERROR, "ttdummy: can't process INSERT event");
 487         if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
 488                 newtuple = trigdata->tg_newtuple;
 489
 490         trigtuple = trigdata->tg_trigtuple;
 491
 492         rel = trigdata->tg_relation;
 493         relname = SPI_getrelname(rel);
 494
 495         /* check if TT is OFF for this relation */
 496         if (ttoff)                                      /* OFF - nothing to do */
 497         {
 498                 pfree(relname);
 499                 return PointerGetDatum((newtuple != NULL) ? newtuple : trigtuple);
 500         }
 501
 502         trigger = trigdata->tg_trigger;
 503
 504         if (trigger->tgnargs != 2)
 505                 elog(ERROR, "ttdummy (%s): invalid (!= 2) number of arguments %d",
 506                          relname, trigger->tgnargs);
 507
 508         args = trigger->tgargs;
 509         tupdesc = rel->rd_att;
 510         natts = tupdesc->natts;
 511
 512         for (i = 0; i < 2; i++)
 513         {
 514                 attnum[i] = SPI_fnumber(tupdesc, args[i]);
 515                 if (attnum[i] < 0)
 516                         elog(ERROR, "ttdummy (%s): there is no attribute %s", relname, args[i]);
 517                 if (SPI_gettypeid(tupdesc, attnum[i]) != INT4OID)
 518                         elog(ERROR, "ttdummy (%s): attributes %s and %s must be of abstime type",
 519                                  relname, args[0], args[1]);
 520         }
 521
 522         oldon = SPI_getbinval(trigtuple, tupdesc, attnum[0], &isnull);
 523         if (isnull)
 524                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 525
 526         oldoff = SPI_getbinval(trigtuple, tupdesc, attnum[1], &isnull);
 527         if (isnull)
 528                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 529
 530         if (newtuple != NULL)           /* UPDATE */
 531         {
 532                 newon = SPI_getbinval(newtuple, tupdesc, attnum[0], &isnull);
 533                 if (isnull)
 534                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 535                 newoff = SPI_getbinval(newtuple, tupdesc, attnum[1], &isnull);
 536                 if (isnull)
 537                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 538
 539                 if (oldon != newon || oldoff != newoff)
 540                         elog(ERROR, "ttdummy (%s): you can't change %s and/or %s columns (use set_ttdummy)",
 541                                  relname, args[0], args[1]);
 542
 543                 if (newoff != TTDUMMY_INFINITY)
 544                 {
 545                         pfree(relname);         /* allocated in upper executor context */
 546                         return PointerGetDatum(NULL);
 547                 }
 548         }
 549         else if (oldoff != TTDUMMY_INFINITY)            /* DELETE */
 550         {
 551                 pfree(relname);
 552                 return PointerGetDatum(NULL);
 553         }
 554
 555         {
 556                 text       *seqname = DatumGetTextP(DirectFunctionCall1(textin,
 557                                                                                 CStringGetDatum("ttdummy_seq")));
 558
 559                 newoff = DirectFunctionCall1(nextval,
 560                                                                          PointerGetDatum(seqname));
 561                 /* nextval now returns int64; coerce down to int32 */
 562                 newoff = Int32GetDatum((int32) DatumGetInt64(newoff));
 563                 pfree(seqname);
 564         }
 565
 566         /* Connect to SPI manager */
 567         if ((ret = SPI_connect()) < 0)
 568                 elog(ERROR, "ttdummy (%s): SPI_connect returned %d", relname, ret);
 569
 570         /* Fetch tuple values and nulls */
 571         cvals = (Datum *) palloc(natts * sizeof(Datum));
 572         cnulls = (char *) palloc(natts * sizeof(char));
 573         for (i = 0; i < natts; i++)
 574         {
 575                 cvals[i] = SPI_getbinval((newtuple != NULL) ? newtuple : trigtuple,
 576                                                                  tupdesc, i + 1, &isnull);
 577                 cnulls[i] = (isnull) ? 'n' : ' ';
 578         }
 579
 580         /* change date column(s) */
 581         if (newtuple)                           /* UPDATE */
 582         {
 583                 cvals[attnum[0] - 1] = newoff;  /* start_date eq current date */
 584                 cnulls[attnum[0] - 1] = ' ';
 585                 cvals[attnum[1] - 1] = TTDUMMY_INFINITY;                /* stop_date eq INFINITY */
 586                 cnulls[attnum[1] - 1] = ' ';
 587         }
 588         else
 589                 /* DELETE */
 590         {
 591                 cvals[attnum[1] - 1] = newoff;  /* stop_date eq current date */
 592                 cnulls[attnum[1] - 1] = ' ';
 593         }
 594
 595         /* if there is no plan ... */
 596         if (splan == NULL)
 597         {
 598                 void       *pplan;
 599                 Oid                *ctypes;
 600                 char       *query;
 601
 602                 /* allocate space in preparation */
 603                 ctypes = (Oid *) palloc(natts * sizeof(Oid));
 604                 query = (char *) palloc(100 + 16 * natts);
 605
 606                 /*
 607                  * Construct query: INSERT INTO _relation_ VALUES ($1, ...)
 608                  */
 609                 sprintf(query, "INSERT INTO %s VALUES (", relname);
 610                 for (i = 1; i <= natts; i++)
 611                 {
 612                         sprintf(query + strlen(query), "$%d%s",
 613                                         i, (i < natts) ? ", " : ")");
 614                         ctypes[i - 1] = SPI_gettypeid(tupdesc, i);
 615                 }
 616
 617                 /* Prepare plan for query */
 618                 pplan = SPI_prepare(query, natts, ctypes);
 619                 if (pplan == NULL)
 620                         elog(ERROR, "ttdummy (%s): SPI_prepare returned %d", relname, SPI_result);
 621
 622                 pplan = SPI_saveplan(pplan);
 623                 if (pplan == NULL)
 624                         elog(ERROR, "ttdummy (%s): SPI_saveplan returned %d", relname, SPI_result);
 625
 626                 splan = pplan;
 627         }
 628
 629         ret = SPI_execp(splan, cvals, cnulls, 0);
 630
 631         if (ret < 0)
 632                 elog(ERROR, "ttdummy (%s): SPI_execp returned %d", relname, ret);
 633
 634         /* Tuple to return to upper Executor ... */
 635         if (newtuple)                           /* UPDATE */
 636         {
 637                 HeapTuple       tmptuple;
 638
 639                 tmptuple = SPI_copytuple(trigtuple);
 640                 rettuple = SPI_modifytuple(rel, tmptuple, 1, &(attnum[1]), &newoff, NULL);
 641                 SPI_freetuple(tmptuple);
 642         }
 643         else
 644                 /* DELETE */
 645                 rettuple = trigtuple;
 646
 647         SPI_finish();                           /* don't forget say Bye to SPI mgr */
 648
 649         pfree(relname);
 650
 651         return PointerGetDatum(rettuple);
 652 }
 653
 654 PG_FUNCTION_INFO_V1(set_ttdummy);
 655
 656 Datum
 657 set_ttdummy(PG_FUNCTION_ARGS)
 658 {
 659         int32           on = PG_GETARG_INT32(0);
 660
 661         if (ttoff)                                      /* OFF currently */
 662         {
 663                 if (on == 0)
 664                         PG_RETURN_INT32(0);
 665
 666                 /* turn ON */
 667                 ttoff = false;
 668                 PG_RETURN_INT32(0);
 669         }
 670
 671         /* ON currently */
 672         if (on != 0)
 673                 PG_RETURN_INT32(1);
 674
 675         /* turn OFF */
 676         ttoff = true;
 677
 678         PG_RETURN_INT32(1);
 679 }
 680
 681
 682 /*
 683  * Type int44 has no real-world use, but the regression tests use it.
 684  * It's a four-element vector of int4's.
 685  */
 686
 687 /*
 688  *              int44in                 - converts "num num ..." to internal form
 689  *
 690  *              Note: Fills any missing positions with zeroes.
 691  */
 692 PG_FUNCTION_INFO_V1(int44in);
 693
 694 Datum
 695 int44in(PG_FUNCTION_ARGS)
 696 {
 697         char       *input_string = PG_GETARG_CSTRING(0);
 698         int32      *result = (int32 *) palloc(4 * sizeof(int32));
 699         int                     i;
 700
 701         i = sscanf(input_string,
 702                            "%d, %d, %d, %d",
 703                            &result[0],
 704                            &result[1],
 705                            &result[2],
 706                            &result[3]);
 707         while (i < 4)
 708                 result[i++] = 0;
 709
 710         PG_RETURN_POINTER(result);
 711 }
 712
 713 /*
 714  *              int44out                - converts internal form to "num num ..."
 715  */
 716 PG_FUNCTION_INFO_V1(int44out);
 717
 718 Datum
 719 int44out(PG_FUNCTION_ARGS)
 720 {
 721         int32      *an_array = (int32 *) PG_GETARG_POINTER(0);
 722         char       *result = (char *) palloc(16 * 4);           /* Allow 14 digits +
 723                                                                                                                  * sign */
 724         int                     i;
 725         char       *walk;
 726
 727         walk = result;
 728         for (i = 0; i < 4; i++)
 729         {
 730                 pg_ltoa(an_array[i], walk);
 731                 while (*++walk != '\0')
 732                         ;
 733                 *walk++ = ' ';
 734         }
 735         *--walk = '\0';
 736         PG_RETURN_CSTRING(result);
 737 }