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

   1 /*
   2  * $PostgreSQL: pgsql/src/test/regress/regress.c,v 1.65 2006/01/11 20:12:43 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 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 /*
  32  * Distance from a point to a path
  33  */
  34 PG_FUNCTION_INFO_V1(regress_dist_ptpath);
  35
  36 Datum
  37 regress_dist_ptpath(PG_FUNCTION_ARGS)
  38 {
  39         Point      *pt = PG_GETARG_POINT_P(0);
  40         PATH       *path = PG_GETARG_PATH_P(1);
  41         float8          result = 0.0;   /* keep compiler quiet */
  42         float8          tmp;
  43         int                     i;
  44         LSEG            lseg;
  45
  46         switch (path->npts)
  47         {
  48                 case 0:
  49                         PG_RETURN_NULL();
  50                 case 1:
  51                         result = point_dt(pt, &path->p[0]);
  52                         break;
  53                 default:
  54
  55                         /*
  56                          * the distance from a point to a path is the smallest distance
  57                          * from the point to any of its constituent segments.
  58                          */
  59                         Assert(path->npts > 1);
  60                         for (i = 0; i < path->npts - 1; ++i)
  61                         {
  62                                 regress_lseg_construct(&lseg, &path->p[i], &path->p[i + 1]);
  63                                 tmp = DatumGetFloat8(DirectFunctionCall2(dist_ps,
  64                                                                                                                  PointPGetDatum(pt),
  65                                                                                                           LsegPGetDatum(&lseg)));
  66                                 if (i == 0 || tmp < result)
  67                                         result = tmp;
  68                         }
  69                         break;
  70         }
  71         PG_RETURN_FLOAT8(result);
  72 }
  73
  74 /*
  75  * this essentially does a cartesian product of the lsegs in the
  76  * two paths, and finds the min distance between any two lsegs
  77  */
  78 PG_FUNCTION_INFO_V1(regress_path_dist);
  79
  80 Datum
  81 regress_path_dist(PG_FUNCTION_ARGS)
  82 {
  83         PATH       *p1 = PG_GETARG_PATH_P(0);
  84         PATH       *p2 = PG_GETARG_PATH_P(1);
  85         bool            have_min = false;
  86         float8          min = 0.0;              /* initialize to keep compiler quiet */
  87         float8          tmp;
  88         int                     i,
  89                                 j;
  90         LSEG            seg1,
  91                                 seg2;
  92
  93         for (i = 0; i < p1->npts - 1; i++)
  94         {
  95                 for (j = 0; j < p2->npts - 1; j++)
  96                 {
  97                         regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
  98                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
  99
 100                         tmp = DatumGetFloat8(DirectFunctionCall2(lseg_distance,
 101                                                                                                          LsegPGetDatum(&seg1),
 102                                                                                                          LsegPGetDatum(&seg2)));
 103                         if (!have_min || tmp < min)
 104                         {
 105                                 min = tmp;
 106                                 have_min = true;
 107                         }
 108                 }
 109         }
 110
 111         if (!have_min)
 112                 PG_RETURN_NULL();
 113
 114         PG_RETURN_FLOAT8(min);
 115 }
 116
 117 PATH *
 118 poly2path(POLYGON *poly)
 119 {
 120         int                     i;
 121         char       *output = (char *) palloc(2 * (P_MAXDIG + 1) * poly->npts + 64);
 122         char            buf[2 * (P_MAXDIG) + 20];
 123
 124         sprintf(output, "(1, %*d", P_MAXDIG, poly->npts);
 125
 126         for (i = 0; i < poly->npts; i++)
 127         {
 128                 snprintf(buf, sizeof(buf), ",%*g,%*g",
 129                                  P_MAXDIG, poly->p[i].x, P_MAXDIG, poly->p[i].y);
 130                 strcat(output, buf);
 131         }
 132
 133         snprintf(buf, sizeof(buf), "%c", RDELIM);
 134         strcat(output, buf);
 135         return DatumGetPathP(DirectFunctionCall1(path_in,
 136                                                                                          CStringGetDatum(output)));
 137 }
 138
 139 /* return the point where two paths intersect, or NULL if no intersection. */
 140 PG_FUNCTION_INFO_V1(interpt_pp);
 141
 142 Datum
 143 interpt_pp(PG_FUNCTION_ARGS)
 144 {
 145         PATH       *p1 = PG_GETARG_PATH_P(0);
 146         PATH       *p2 = PG_GETARG_PATH_P(1);
 147         int                     i,
 148                                 j;
 149         LSEG            seg1,
 150                                 seg2;
 151         bool            found;                  /* We've found the intersection */
 152
 153         found = false;                          /* Haven't found it yet */
 154
 155         for (i = 0; i < p1->npts - 1 && !found; i++)
 156         {
 157                 regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
 158                 for (j = 0; j < p2->npts - 1 && !found; j++)
 159                 {
 160                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
 161                         if (DatumGetBool(DirectFunctionCall2(lseg_intersect,
 162                                                                                                  LsegPGetDatum(&seg1),
 163                                                                                                  LsegPGetDatum(&seg2))))
 164                                 found = true;
 165                 }
 166         }
 167
 168         if (!found)
 169                 PG_RETURN_NULL();
 170
 171         /*
 172          * Note: DirectFunctionCall2 will kick out an error if lseg_interpt()
 173          * returns NULL, but that should be impossible since we know the two
 174          * segments intersect.
 175          */
 176         PG_RETURN_DATUM(DirectFunctionCall2(lseg_interpt,
 177                                                                                 LsegPGetDatum(&seg1),
 178                                                                                 LsegPGetDatum(&seg2)));
 179 }
 180
 181
 182 /* like lseg_construct, but assume space already allocated */
 183 void
 184 regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2)
 185 {
 186         lseg->p[0].x = pt1->x;
 187         lseg->p[0].y = pt1->y;
 188         lseg->p[1].x = pt2->x;
 189         lseg->p[1].y = pt2->y;
 190         lseg->m = point_sl(pt1, pt2);
 191 }
 192
 193 PG_FUNCTION_INFO_V1(overpaid);
 194
 195 Datum
 196 overpaid(PG_FUNCTION_ARGS)
 197 {
 198         HeapTupleHeader tuple = PG_GETARG_HEAPTUPLEHEADER(0);
 199         bool            isnull;
 200         int32           salary;
 201
 202         salary = DatumGetInt32(GetAttributeByName(tuple, "salary", &isnull));
 203         if (isnull)
 204                 PG_RETURN_NULL();
 205         PG_RETURN_BOOL(salary > 699);
 206 }
 207
 208 /* New type "widget"
 209  * This used to be "circle", but I added circle to builtins,
 210  *      so needed to make sure the names do not collide. - tgl 97/04/21
 211  */
 212
 213 typedef struct
 214 {
 215         Point           center;
 216         double          radius;
 217 }       WIDGET;
 218
 219 WIDGET     *widget_in(char *str);
 220 char       *widget_out(WIDGET * widget);
 221 extern Datum pt_in_widget(PG_FUNCTION_ARGS);
 222
 223 #define NARGS   3
 224
 225 WIDGET *
 226 widget_in(char *str)
 227 {
 228         char       *p,
 229                            *coord[NARGS],
 230                                 buf2[1000];
 231         int                     i;
 232         WIDGET     *result;
 233
 234         if (str == NULL)
 235                 return NULL;
 236         for (i = 0, p = str; *p && i < NARGS && *p != RDELIM; p++)
 237                 if (*p == ',' || (*p == LDELIM && !i))
 238                         coord[i++] = p + 1;
 239         if (i < NARGS - 1)
 240                 return NULL;
 241         result = (WIDGET *) palloc(sizeof(WIDGET));
 242         result->center.x = atof(coord[0]);
 243         result->center.y = atof(coord[1]);
 244         result->radius = atof(coord[2]);
 245
 246         snprintf(buf2, sizeof(buf2), "widget_in: read (%f, %f, %f)\n",
 247                          result->center.x, result->center.y, result->radius);
 248         return result;
 249 }
 250
 251 char *
 252 widget_out(WIDGET * widget)
 253 {
 254         char       *result;
 255
 256         if (widget == NULL)
 257                 return NULL;
 258
 259         result = (char *) palloc(60);
 260         sprintf(result, "(%g,%g,%g)",
 261                         widget->center.x, widget->center.y, widget->radius);
 262         return result;
 263 }
 264
 265 PG_FUNCTION_INFO_V1(pt_in_widget);
 266
 267 Datum
 268 pt_in_widget(PG_FUNCTION_ARGS)
 269 {
 270         Point      *point = PG_GETARG_POINT_P(0);
 271         WIDGET     *widget = (WIDGET *) PG_GETARG_POINTER(1);
 272
 273         PG_RETURN_BOOL(point_dt(point, &widget->center) < widget->radius);
 274 }
 275
 276 PG_FUNCTION_INFO_V1(boxarea);
 277
 278 Datum
 279 boxarea(PG_FUNCTION_ARGS)
 280 {
 281         BOX                *box = PG_GETARG_BOX_P(0);
 282         double          width,
 283                                 height;
 284
 285         width = Abs(box->high.x - box->low.x);
 286         height = Abs(box->high.y - box->low.y);
 287         PG_RETURN_FLOAT8(width * height);
 288 }
 289
 290 char *
 291 reverse_name(char *string)
 292 {
 293         int                     i;
 294         int                     len;
 295         char       *new_string;
 296
 297         new_string = palloc0(NAMEDATALEN);
 298         for (i = 0; i < NAMEDATALEN && string[i]; ++i)
 299                 ;
 300         if (i == NAMEDATALEN || !string[i])
 301                 --i;
 302         len = i;
 303         for (; i >= 0; --i)
 304                 new_string[len - i] = string[i];
 305         return new_string;
 306 }
 307
 308 /*
 309  * This rather silly function is just to test that oldstyle functions
 310  * work correctly on toast-able inputs.
 311  */
 312 int
 313 oldstyle_length(int n, text *t)
 314 {
 315         int                     len = 0;
 316
 317         if (t)
 318                 len = VARSIZE(t) - VARHDRSZ;
 319
 320         return n + len;
 321 }
 322
 323 #include "executor/spi.h"               /* this is what you need to work with SPI */
 324 #include "commands/trigger.h"   /* -"- and triggers */
 325
 326 static TransactionId fd17b_xid = InvalidTransactionId;
 327 static TransactionId fd17a_xid = InvalidTransactionId;
 328 static int      fd17b_level = 0;
 329 static int      fd17a_level = 0;
 330 static bool fd17b_recursion = true;
 331 static bool fd17a_recursion = true;
 332 extern Datum funny_dup17(PG_FUNCTION_ARGS);
 333
 334 PG_FUNCTION_INFO_V1(funny_dup17);
 335
 336 Datum
 337 funny_dup17(PG_FUNCTION_ARGS)
 338 {
 339         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 340         TransactionId *xid;
 341         int                *level;
 342         bool       *recursion;
 343         Relation        rel;
 344         TupleDesc       tupdesc;
 345         HeapTuple       tuple;
 346         char       *query,
 347                            *fieldval,
 348                            *fieldtype;
 349         char       *when;
 350         int                     inserted;
 351         int                     selected = 0;
 352         int                     ret;
 353
 354         if (!CALLED_AS_TRIGGER(fcinfo))
 355                 elog(ERROR, "funny_dup17: not fired by trigger manager");
 356
 357         tuple = trigdata->tg_trigtuple;
 358         rel = trigdata->tg_relation;
 359         tupdesc = rel->rd_att;
 360         if (TRIGGER_FIRED_BEFORE(trigdata->tg_event))
 361         {
 362                 xid = &fd17b_xid;
 363                 level = &fd17b_level;
 364                 recursion = &fd17b_recursion;
 365                 when = "BEFORE";
 366         }
 367         else
 368         {
 369                 xid = &fd17a_xid;
 370                 level = &fd17a_level;
 371                 recursion = &fd17a_recursion;
 372                 when = "AFTER ";
 373         }
 374
 375         if (!TransactionIdIsCurrentTransactionId(*xid))
 376         {
 377                 *xid = GetCurrentTransactionId();
 378                 *level = 0;
 379                 *recursion = true;
 380         }
 381
 382         if (*level == 17)
 383         {
 384                 *recursion = false;
 385                 return PointerGetDatum(tuple);
 386         }
 387
 388         if (!(*recursion))
 389                 return PointerGetDatum(tuple);
 390
 391         (*level)++;
 392
 393         SPI_connect();
 394
 395         fieldval = SPI_getvalue(tuple, tupdesc, 1);
 396         fieldtype = SPI_gettype(tupdesc, 1);
 397
 398         query = (char *) palloc(100 + NAMEDATALEN * 3 +
 399                                                         strlen(fieldval) + strlen(fieldtype));
 400
 401         sprintf(query, "insert into %s select * from %s where %s = '%s'::%s",
 402                         SPI_getrelname(rel), SPI_getrelname(rel),
 403                         SPI_fname(tupdesc, 1),
 404                         fieldval, fieldtype);
 405
 406         if ((ret = SPI_exec(query, 0)) < 0)
 407                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (insert ...) returned %d",
 408                          when, *level, ret);
 409
 410         inserted = SPI_processed;
 411
 412         sprintf(query, "select count (*) from %s where %s = '%s'::%s",
 413                         SPI_getrelname(rel),
 414                         SPI_fname(tupdesc, 1),
 415                         fieldval, fieldtype);
 416
 417         if ((ret = SPI_exec(query, 0)) < 0)
 418                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (select ...) returned %d",
 419                          when, *level, ret);
 420
 421         if (SPI_processed > 0)
 422         {
 423                 selected = DatumGetInt32(DirectFunctionCall1(int4in,
 424                                                                                                 CStringGetDatum(SPI_getvalue(
 425                                                                                                            SPI_tuptable->vals[0],
 426                                                                                                            SPI_tuptable->tupdesc,
 427                                                                                                                                                          1
 428                                                                                                                                                 ))));
 429         }
 430
 431         elog(DEBUG4, "funny_dup17 (fired %s) on level %3d: %d/%d tuples inserted/selected",
 432                  when, *level, inserted, selected);
 433
 434         SPI_finish();
 435
 436         (*level)--;
 437
 438         if (*level == 0)
 439                 *xid = InvalidTransactionId;
 440
 441         return PointerGetDatum(tuple);
 442 }
 443
 444 extern Datum ttdummy(PG_FUNCTION_ARGS);
 445 extern Datum set_ttdummy(PG_FUNCTION_ARGS);
 446
 447 #define TTDUMMY_INFINITY        999999
 448
 449 static void *splan = NULL;
 450 static bool ttoff = false;
 451
 452 PG_FUNCTION_INFO_V1(ttdummy);
 453
 454 Datum
 455 ttdummy(PG_FUNCTION_ARGS)
 456 {
 457         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 458         Trigger    *trigger;            /* to get trigger name */
 459         char      **args;                       /* arguments */
 460         int                     attnum[2];              /* fnumbers of start/stop columns */
 461         Datum           oldon,
 462                                 oldoff;
 463         Datum           newon,
 464                                 newoff;
 465         Datum      *cvals;                      /* column values */
 466         char       *cnulls;                     /* column nulls */
 467         char       *relname;            /* triggered relation name */
 468         Relation        rel;                    /* triggered relation */
 469         HeapTuple       trigtuple;
 470         HeapTuple       newtuple = NULL;
 471         HeapTuple       rettuple;
 472         TupleDesc       tupdesc;                /* tuple description */
 473         int                     natts;                  /* # of attributes */
 474         bool            isnull;                 /* to know is some column NULL or not */
 475         int                     ret;
 476         int                     i;
 477
 478         if (!CALLED_AS_TRIGGER(fcinfo))
 479                 elog(ERROR, "ttdummy: not fired by trigger manager");
 480         if (TRIGGER_FIRED_FOR_STATEMENT(trigdata->tg_event))
 481                 elog(ERROR, "ttdummy: can't process STATEMENT events");
 482         if (TRIGGER_FIRED_AFTER(trigdata->tg_event))
 483                 elog(ERROR, "ttdummy: must be fired before event");
 484         if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
 485                 elog(ERROR, "ttdummy: can't process INSERT event");
 486         if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
 487                 newtuple = trigdata->tg_newtuple;
 488
 489         trigtuple = trigdata->tg_trigtuple;
 490
 491         rel = trigdata->tg_relation;
 492         relname = SPI_getrelname(rel);
 493
 494         /* check if TT is OFF for this relation */
 495         if (ttoff)                                      /* OFF - nothing to do */
 496         {
 497                 pfree(relname);
 498                 return PointerGetDatum((newtuple != NULL) ? newtuple : trigtuple);
 499         }
 500
 501         trigger = trigdata->tg_trigger;
 502
 503         if (trigger->tgnargs != 2)
 504                 elog(ERROR, "ttdummy (%s): invalid (!= 2) number of arguments %d",
 505                          relname, trigger->tgnargs);
 506
 507         args = trigger->tgargs;
 508         tupdesc = rel->rd_att;
 509         natts = tupdesc->natts;
 510
 511         for (i = 0; i < 2; i++)
 512         {
 513                 attnum[i] = SPI_fnumber(tupdesc, args[i]);
 514                 if (attnum[i] < 0)
 515                         elog(ERROR, "ttdummy (%s): there is no attribute %s", relname, args[i]);
 516                 if (SPI_gettypeid(tupdesc, attnum[i]) != INT4OID)
 517                         elog(ERROR, "ttdummy (%s): attributes %s and %s must be of abstime type",
 518                                  relname, args[0], args[1]);
 519         }
 520
 521         oldon = SPI_getbinval(trigtuple, tupdesc, attnum[0], &isnull);
 522         if (isnull)
 523                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 524
 525         oldoff = SPI_getbinval(trigtuple, tupdesc, attnum[1], &isnull);
 526         if (isnull)
 527                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 528
 529         if (newtuple != NULL)           /* UPDATE */
 530         {
 531                 newon = SPI_getbinval(newtuple, tupdesc, attnum[0], &isnull);
 532                 if (isnull)
 533                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 534                 newoff = SPI_getbinval(newtuple, tupdesc, attnum[1], &isnull);
 535                 if (isnull)
 536                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 537
 538                 if (oldon != newon || oldoff != newoff)
 539                         elog(ERROR, "ttdummy (%s): you can't change %s and/or %s columns (use set_ttdummy)",
 540                                  relname, args[0], args[1]);
 541
 542                 if (newoff != TTDUMMY_INFINITY)
 543                 {
 544                         pfree(relname);         /* allocated in upper executor context */
 545                         return PointerGetDatum(NULL);
 546                 }
 547         }
 548         else if (oldoff != TTDUMMY_INFINITY)            /* DELETE */
 549         {
 550                 pfree(relname);
 551                 return PointerGetDatum(NULL);
 552         }
 553
 554         {
 555                 text       *seqname = DatumGetTextP(DirectFunctionCall1(textin,
 556                                                                                         CStringGetDatum("ttdummy_seq")));
 557
 558                 newoff = DirectFunctionCall1(nextval,
 559                                                                          PointerGetDatum(seqname));
 560                 /* nextval now returns int64; coerce down to int32 */
 561                 newoff = Int32GetDatum((int32) DatumGetInt64(newoff));
 562                 pfree(seqname);
 563         }
 564
 565         /* Connect to SPI manager */
 566         if ((ret = SPI_connect()) < 0)
 567                 elog(ERROR, "ttdummy (%s): SPI_connect returned %d", relname, ret);
 568
 569         /* Fetch tuple values and nulls */
 570         cvals = (Datum *) palloc(natts * sizeof(Datum));
 571         cnulls = (char *) palloc(natts * sizeof(char));
 572         for (i = 0; i < natts; i++)
 573         {
 574                 cvals[i] = SPI_getbinval((newtuple != NULL) ? newtuple : trigtuple,
 575                                                                  tupdesc, i + 1, &isnull);
 576                 cnulls[i] = (isnull) ? 'n' : ' ';
 577         }
 578
 579         /* change date column(s) */
 580         if (newtuple)                           /* UPDATE */
 581         {
 582                 cvals[attnum[0] - 1] = newoff;  /* start_date eq current date */
 583                 cnulls[attnum[0] - 1] = ' ';
 584                 cvals[attnum[1] - 1] = TTDUMMY_INFINITY;                /* stop_date eq INFINITY */
 585                 cnulls[attnum[1] - 1] = ' ';
 586         }
 587         else
 588                 /* DELETE */
 589         {
 590                 cvals[attnum[1] - 1] = newoff;  /* stop_date eq current date */
 591                 cnulls[attnum[1] - 1] = ' ';
 592         }
 593
 594         /* if there is no plan ... */
 595         if (splan == NULL)
 596         {
 597                 void       *pplan;
 598                 Oid                *ctypes;
 599                 char       *query;
 600
 601                 /* allocate space in preparation */
 602                 ctypes = (Oid *) palloc(natts * sizeof(Oid));
 603                 query = (char *) palloc(100 + 16 * natts);
 604
 605                 /*
 606                  * Construct query: INSERT INTO _relation_ VALUES ($1, ...)
 607                  */
 608                 sprintf(query, "INSERT INTO %s VALUES (", relname);
 609                 for (i = 1; i <= natts; i++)
 610                 {
 611                         sprintf(query + strlen(query), "$%d%s",
 612                                         i, (i < natts) ? ", " : ")");
 613                         ctypes[i - 1] = SPI_gettypeid(tupdesc, i);
 614                 }
 615
 616                 /* Prepare plan for query */
 617                 pplan = SPI_prepare(query, natts, ctypes);
 618                 if (pplan == NULL)
 619                         elog(ERROR, "ttdummy (%s): SPI_prepare returned %d", relname, SPI_result);
 620
 621                 pplan = SPI_saveplan(pplan);
 622                 if (pplan == NULL)
 623                         elog(ERROR, "ttdummy (%s): SPI_saveplan returned %d", relname, SPI_result);
 624
 625                 splan = pplan;
 626         }
 627
 628         ret = SPI_execp(splan, cvals, cnulls, 0);
 629
 630         if (ret < 0)
 631                 elog(ERROR, "ttdummy (%s): SPI_execp returned %d", relname, ret);
 632
 633         /* Tuple to return to upper Executor ... */
 634         if (newtuple)                           /* UPDATE */
 635         {
 636                 HeapTuple       tmptuple;
 637
 638                 tmptuple = SPI_copytuple(trigtuple);
 639                 rettuple = SPI_modifytuple(rel, tmptuple, 1, &(attnum[1]), &newoff, NULL);
 640                 SPI_freetuple(tmptuple);
 641         }
 642         else
 643                 /* DELETE */
 644                 rettuple = trigtuple;
 645
 646         SPI_finish();                           /* don't forget say Bye to SPI mgr */
 647
 648         pfree(relname);
 649
 650         return PointerGetDatum(rettuple);
 651 }
 652
 653 PG_FUNCTION_INFO_V1(set_ttdummy);
 654
 655 Datum
 656 set_ttdummy(PG_FUNCTION_ARGS)
 657 {
 658         int32           on = PG_GETARG_INT32(0);
 659
 660         if (ttoff)                                      /* OFF currently */
 661         {
 662                 if (on == 0)
 663                         PG_RETURN_INT32(0);
 664
 665                 /* turn ON */
 666                 ttoff = false;
 667                 PG_RETURN_INT32(0);
 668         }
 669
 670         /* ON currently */
 671         if (on != 0)
 672                 PG_RETURN_INT32(1);
 673
 674         /* turn OFF */
 675         ttoff = true;
 676
 677         PG_RETURN_INT32(1);
 678 }
 679
 680
 681 /*
 682  * Type int44 has no real-world use, but the regression tests use it.
 683  * It's a four-element vector of int4's.
 684  */
 685
 686 /*
 687  *              int44in                 - converts "num num ..." to internal form
 688  *
 689  *              Note: Fills any missing positions with zeroes.
 690  */
 691 PG_FUNCTION_INFO_V1(int44in);
 692
 693 Datum
 694 int44in(PG_FUNCTION_ARGS)
 695 {
 696         char       *input_string = PG_GETARG_CSTRING(0);
 697         int32      *result = (int32 *) palloc(4 * sizeof(int32));
 698         int                     i;
 699
 700         i = sscanf(input_string,
 701                            "%d, %d, %d, %d",
 702                            &result[0],
 703                            &result[1],
 704                            &result[2],
 705                            &result[3]);
 706         while (i < 4)
 707                 result[i++] = 0;
 708
 709         PG_RETURN_POINTER(result);
 710 }
 711
 712 /*
 713  *              int44out                - converts internal form to "num num ..."
 714  */
 715 PG_FUNCTION_INFO_V1(int44out);
 716
 717 Datum
 718 int44out(PG_FUNCTION_ARGS)
 719 {
 720         int32      *an_array = (int32 *) PG_GETARG_POINTER(0);
 721         char       *result = (char *) palloc(16 * 4);           /* Allow 14 digits +
 722                                                                                                                  * sign */
 723         int                     i;
 724         char       *walk;
 725
 726         walk = result;
 727         for (i = 0; i < 4; i++)
 728         {
 729                 pg_ltoa(an_array[i], walk);
 730                 while (*++walk != '\0')
 731                         ;
 732                 *walk++ = ' ';
 733         }
 734         *--walk = '\0';
 735         PG_RETURN_CSTRING(result);
 736 }