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

   1 /*
   2  * $Header: /cvsroot/pgsql/src/test/regress/regress.c,v 1.46 2001/02/10 02:31:30 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
  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 /* this essentially does a cartesian product of the lsegs in the
  74    two paths, and finds the min distance between any two lsegs */
  75 PG_FUNCTION_INFO_V1(regress_path_dist);
  76
  77 Datum
  78 regress_path_dist(PG_FUNCTION_ARGS)
  79 {
  80         PATH       *p1 = PG_GETARG_PATH_P(0);
  81         PATH       *p2 = PG_GETARG_PATH_P(1);
  82         bool            have_min = false;
  83         float8          min = 0.0;              /* initialize to keep compiler quiet */
  84         float8          tmp;
  85         int                     i,
  86                                 j;
  87         LSEG            seg1,
  88                                 seg2;
  89
  90         for (i = 0; i < p1->npts - 1; i++)
  91         {
  92                 for (j = 0; j < p2->npts - 1; j++)
  93                 {
  94                         regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
  95                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
  96
  97                         tmp = DatumGetFloat8(DirectFunctionCall2(lseg_distance,
  98                                                                                                          LsegPGetDatum(&seg1),
  99                                                                                                          LsegPGetDatum(&seg2)));
 100                         if (!have_min || tmp < min)
 101                         {
 102                                 min = tmp;
 103                                 have_min = true;
 104                         }
 105                 }
 106         }
 107
 108         if (! have_min)
 109                 PG_RETURN_NULL();
 110
 111         PG_RETURN_FLOAT8(min);
 112 }
 113
 114 PATH *
 115 poly2path(poly)
 116 POLYGON    *poly;
 117 {
 118         int                     i;
 119         char       *output = (char *) palloc(2 * (P_MAXDIG + 1) * poly->npts + 64);
 120         char            buf[2 * (P_MAXDIG) + 20];
 121
 122         sprintf(output, "(1, %*d", P_MAXDIG, poly->npts);
 123
 124         for (i = 0; i < poly->npts; i++)
 125         {
 126                 sprintf(buf, ",%*g,%*g", P_MAXDIG, poly->p[i].x, P_MAXDIG, poly->p[i].y);
 127                 strcat(output, buf);
 128         }
 129
 130         sprintf(buf, "%c", RDELIM);
 131         strcat(output, buf);
 132         return DatumGetPathP(DirectFunctionCall1(path_in,
 133                                                                                          CStringGetDatum(output)));
 134 }
 135
 136 /* return the point where two paths intersect, or NULL if no intersection. */
 137 PG_FUNCTION_INFO_V1(interpt_pp);
 138
 139 Datum
 140 interpt_pp(PG_FUNCTION_ARGS)
 141 {
 142         PATH       *p1 = PG_GETARG_PATH_P(0);
 143         PATH       *p2 = PG_GETARG_PATH_P(1);
 144         int                     i,
 145                                 j;
 146         LSEG            seg1,
 147                                 seg2;
 148         bool            found;                  /* We've found the intersection */
 149
 150         found = false;                          /* Haven't found it yet */
 151
 152         for (i = 0; i < p1->npts - 1 && !found; i++)
 153         {
 154                 regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
 155                 for (j = 0; j < p2->npts - 1 && !found; j++)
 156                 {
 157                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
 158                         if (DatumGetBool(DirectFunctionCall2(lseg_intersect,
 159                                                                                                  LsegPGetDatum(&seg1),
 160                                                                                                  LsegPGetDatum(&seg2))))
 161                                 found = true;
 162                 }
 163         }
 164
 165         if (!found)
 166                 PG_RETURN_NULL();
 167
 168         /* Note: DirectFunctionCall2 will kick out an error if lseg_interpt()
 169          * returns NULL, but that should be impossible since we know the two
 170          * segments intersect.
 171          */
 172         PG_RETURN_DATUM(DirectFunctionCall2(lseg_interpt,
 173                                                                                 LsegPGetDatum(&seg1),
 174                                                                                 LsegPGetDatum(&seg2)));
 175 }
 176
 177
 178 /* like lseg_construct, but assume space already allocated */
 179 void
 180 regress_lseg_construct(lseg, pt1, pt2)
 181 LSEG       *lseg;
 182 Point      *pt1;
 183 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         TUPLE           tuple = (TUPLE) PG_GETARG_POINTER(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(str)
 226 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         sprintf(buf2, "widget_in: read (%f, %f, %f)\n", result->center.x,
 247                         result->center.y, result->radius);
 248         return result;
 249 }
 250
 251 char *
 252 widget_out(widget)
 253 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         if (!(new_string = palloc(NAMEDATALEN)))
 301         {
 302                 fprintf(stderr, "reverse_name: palloc failed\n");
 303                 return NULL;
 304         }
 305         MemSet(new_string, 0, NAMEDATALEN);
 306         for (i = 0; i < NAMEDATALEN && string[i]; ++i)
 307                 ;
 308         if (i == NAMEDATALEN || !string[i])
 309                 --i;
 310         len = i;
 311         for (; i >= 0; --i)
 312                 new_string[len - i] = string[i];
 313         return new_string;
 314 }
 315
 316 /* This rather silly function is just to test that oldstyle functions
 317  * work correctly on toast-able inputs.
 318  */
 319 int
 320 oldstyle_length(int n, text *t)
 321 {
 322         int             len = 0;
 323
 324         if (t)
 325                 len = VARSIZE(t) - VARHDRSZ;
 326
 327         return n + len;
 328 }
 329
 330 #include "executor/spi.h"               /* this is what you need to work with SPI */
 331 #include "commands/trigger.h"   /* -"- and triggers */
 332
 333 static TransactionId fd17b_xid = InvalidTransactionId;
 334 static TransactionId fd17a_xid = InvalidTransactionId;
 335 static int      fd17b_level = 0;
 336 static int      fd17a_level = 0;
 337 static bool fd17b_recursion = true;
 338 static bool fd17a_recursion = true;
 339 extern Datum funny_dup17(PG_FUNCTION_ARGS);
 340
 341 PG_FUNCTION_INFO_V1(funny_dup17);
 342
 343 Datum
 344 funny_dup17(PG_FUNCTION_ARGS)
 345 {
 346         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 347         TransactionId *xid;
 348         int                *level;
 349         bool       *recursion;
 350         Relation        rel;
 351         TupleDesc       tupdesc;
 352         HeapTuple       tuple;
 353         char       *query,
 354                            *fieldval,
 355                            *fieldtype;
 356         char       *when;
 357         int                     inserted;
 358         int                     selected = 0;
 359         int                     ret;
 360
 361         if (!CALLED_AS_TRIGGER(fcinfo))
 362                 elog(ERROR, "funny_dup17: not fired by trigger manager");
 363
 364         tuple = trigdata->tg_trigtuple;
 365         rel = trigdata->tg_relation;
 366         tupdesc = rel->rd_att;
 367         if (TRIGGER_FIRED_BEFORE(trigdata->tg_event))
 368         {
 369                 xid = &fd17b_xid;
 370                 level = &fd17b_level;
 371                 recursion = &fd17b_recursion;
 372                 when = "BEFORE";
 373         }
 374         else
 375         {
 376                 xid = &fd17a_xid;
 377                 level = &fd17a_level;
 378                 recursion = &fd17a_recursion;
 379                 when = "AFTER ";
 380         }
 381
 382         if (!TransactionIdIsCurrentTransactionId(*xid))
 383         {
 384                 *xid = GetCurrentTransactionId();
 385                 *level = 0;
 386                 *recursion = true;
 387         }
 388
 389         if (*level == 17)
 390         {
 391                 *recursion = false;
 392                 return PointerGetDatum(tuple);
 393         }
 394
 395         if (!(*recursion))
 396                 return PointerGetDatum(tuple);
 397
 398         (*level)++;
 399
 400         SPI_connect();
 401
 402         fieldval = SPI_getvalue(tuple, tupdesc, 1);
 403         fieldtype = SPI_gettype(tupdesc, 1);
 404
 405         query = (char *) palloc(100 + NAMEDATALEN * 3 +
 406                                                         strlen(fieldval) + strlen(fieldtype));
 407
 408         sprintf(query, "insert into %s select * from %s where %s = '%s'::%s",
 409                         SPI_getrelname(rel), SPI_getrelname(rel),
 410                         SPI_fname(tupdesc, 1),
 411                         fieldval, fieldtype);
 412
 413         if ((ret = SPI_exec(query, 0)) < 0)
 414                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (insert ...) returned %d",
 415                          when, *level, ret);
 416
 417         inserted = SPI_processed;
 418
 419         sprintf(query, "select count (*) from %s where %s = '%s'::%s",
 420                         SPI_getrelname(rel),
 421                         SPI_fname(tupdesc, 1),
 422                         fieldval, fieldtype);
 423
 424         if ((ret = SPI_exec(query, 0)) < 0)
 425                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (select ...) returned %d",
 426                          when, *level, ret);
 427
 428         if (SPI_processed > 0)
 429         {
 430                 selected = DatumGetInt32(DirectFunctionCall1(int4in,
 431                                                                  CStringGetDatum(SPI_getvalue(
 432                                                                            SPI_tuptable->vals[0],
 433                                                                            SPI_tuptable->tupdesc,
 434                                                                            1
 435                                                                            ))));
 436         }
 437
 438         elog(NOTICE, "funny_dup17 (fired %s) on level %3d: %d/%d tuples inserted/selected",
 439                  when, *level, inserted, selected);
 440
 441         SPI_finish();
 442
 443         (*level)--;
 444
 445         if (*level == 0)
 446                 *xid = InvalidTransactionId;
 447
 448         return PointerGetDatum(tuple);
 449 }
 450
 451 extern Datum ttdummy(PG_FUNCTION_ARGS);
 452 extern Datum set_ttdummy(PG_FUNCTION_ARGS);
 453
 454 #define TTDUMMY_INFINITY        999999
 455
 456 static void *splan = NULL;
 457 static bool ttoff = false;
 458
 459 PG_FUNCTION_INFO_V1(ttdummy);
 460
 461 Datum
 462 ttdummy(PG_FUNCTION_ARGS)
 463 {
 464         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 465         Trigger    *trigger;            /* to get trigger name */
 466         char      **args;                       /* arguments */
 467         int                     attnum[2];              /* fnumbers of start/stop columns */
 468         Datum           oldon,
 469                                 oldoff;
 470         Datum           newon,
 471                                 newoff;
 472         Datum      *cvals;                      /* column values */
 473         char       *cnulls;                     /* column nulls */
 474         char       *relname;            /* triggered relation name */
 475         Relation        rel;                    /* triggered relation */
 476         HeapTuple       trigtuple;
 477         HeapTuple       newtuple = NULL;
 478         HeapTuple       rettuple;
 479         TupleDesc       tupdesc;                /* tuple description */
 480         int                     natts;                  /* # of attributes */
 481         bool            isnull;                 /* to know is some column NULL or not */
 482         int                     ret;
 483         int                     i;
 484
 485         if (!CALLED_AS_TRIGGER(fcinfo))
 486                 elog(ERROR, "ttdummy: not fired by trigger manager");
 487         if (TRIGGER_FIRED_FOR_STATEMENT(trigdata->tg_event))
 488                 elog(ERROR, "ttdummy: can't process STATEMENT events");
 489         if (TRIGGER_FIRED_AFTER(trigdata->tg_event))
 490                 elog(ERROR, "ttdummy: must be fired before event");
 491         if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
 492                 elog(ERROR, "ttdummy: can't process INSERT event");
 493         if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
 494                 newtuple = trigdata->tg_newtuple;
 495
 496         trigtuple = trigdata->tg_trigtuple;
 497
 498         rel = trigdata->tg_relation;
 499         relname = SPI_getrelname(rel);
 500
 501         /* check if TT is OFF for this relation */
 502         if (ttoff)                                      /* OFF - nothing to do */
 503         {
 504                 pfree(relname);
 505                 return PointerGetDatum((newtuple != NULL) ? newtuple : trigtuple);
 506         }
 507
 508         trigger = trigdata->tg_trigger;
 509
 510         if (trigger->tgnargs != 2)
 511                 elog(ERROR, "ttdummy (%s): invalid (!= 2) number of arguments %d",
 512                          relname, trigger->tgnargs);
 513
 514         args = trigger->tgargs;
 515         tupdesc = rel->rd_att;
 516         natts = tupdesc->natts;
 517
 518         for (i = 0; i < 2; i++)
 519         {
 520                 attnum[i] = SPI_fnumber(tupdesc, args[i]);
 521                 if (attnum[i] < 0)
 522                         elog(ERROR, "ttdummy (%s): there is no attribute %s", relname, args[i]);
 523                 if (SPI_gettypeid(tupdesc, attnum[i]) != INT4OID)
 524                         elog(ERROR, "ttdummy (%s): attributes %s and %s must be of abstime type",
 525                                  relname, args[0], args[1]);
 526         }
 527
 528         oldon = SPI_getbinval(trigtuple, tupdesc, attnum[0], &isnull);
 529         if (isnull)
 530                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 531
 532         oldoff = SPI_getbinval(trigtuple, tupdesc, attnum[1], &isnull);
 533         if (isnull)
 534                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 535
 536         if (newtuple != NULL)           /* UPDATE */
 537         {
 538                 newon = SPI_getbinval(newtuple, tupdesc, attnum[0], &isnull);
 539                 if (isnull)
 540                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 541                 newoff = SPI_getbinval(newtuple, tupdesc, attnum[1], &isnull);
 542                 if (isnull)
 543                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 544
 545                 if (oldon != newon || oldoff != newoff)
 546                         elog(ERROR, "ttdummy (%s): you can't change %s and/or %s columns (use set_ttdummy)",
 547                                  relname, args[0], args[1]);
 548
 549                 if (newoff != TTDUMMY_INFINITY)
 550                 {
 551                         pfree(relname);         /* allocated in upper executor context */
 552                         return PointerGetDatum(NULL);
 553                 }
 554         }
 555         else if (oldoff != TTDUMMY_INFINITY)            /* DELETE */
 556         {
 557                 pfree(relname);
 558                 return PointerGetDatum(NULL);
 559         }
 560
 561         {
 562                 text   *seqname = DatumGetTextP(DirectFunctionCall1(textin,
 563                                                                                         CStringGetDatum("ttdummy_seq")));
 564
 565                 newoff = DirectFunctionCall1(nextval,
 566                                                                          PointerGetDatum(seqname));
 567                 pfree(seqname);
 568         }
 569
 570         /* Connect to SPI manager */
 571         if ((ret = SPI_connect()) < 0)
 572                 elog(ERROR, "ttdummy (%s): SPI_connect returned %d", relname, ret);
 573
 574         /* Fetch tuple values and nulls */
 575         cvals = (Datum *) palloc(natts * sizeof(Datum));
 576         cnulls = (char *) palloc(natts * sizeof(char));
 577         for (i = 0; i < natts; i++)
 578         {
 579                 cvals[i] = SPI_getbinval((newtuple != NULL) ? newtuple : trigtuple,
 580                                                                  tupdesc, i + 1, &isnull);
 581                 cnulls[i] = (isnull) ? 'n' : ' ';
 582         }
 583
 584         /* change date column(s) */
 585         if (newtuple)                           /* UPDATE */
 586         {
 587                 cvals[attnum[0] - 1] = newoff;  /* start_date eq current date */
 588                 cnulls[attnum[0] - 1] = ' ';
 589                 cvals[attnum[1] - 1] = TTDUMMY_INFINITY;                /* stop_date eq INFINITY */
 590                 cnulls[attnum[1] - 1] = ' ';
 591         }
 592         else
 593 /* DELETE */
 594         {
 595                 cvals[attnum[1] - 1] = newoff;  /* stop_date eq current date */
 596                 cnulls[attnum[1] - 1] = ' ';
 597         }
 598
 599         /* if there is no plan ... */
 600         if (splan == NULL)
 601         {
 602                 void       *pplan;
 603                 Oid                *ctypes;
 604                 char       *query;
 605
 606                 /* allocate space in preparation */
 607                 ctypes = (Oid *) palloc(natts * sizeof(Oid));
 608                 query = (char *) palloc(100 + 16 * natts);
 609
 610                 /*
 611                  * Construct query: INSERT INTO _relation_ VALUES ($1, ...)
 612                  */
 613                 sprintf(query, "INSERT INTO %s VALUES (", relname);
 614                 for (i = 1; i <= natts; i++)
 615                 {
 616                         sprintf(query + strlen(query), "$%d%s",
 617                                         i, (i < natts) ? ", " : ")");
 618                         ctypes[i - 1] = SPI_gettypeid(tupdesc, i);
 619                 }
 620
 621                 /* Prepare plan for query */
 622                 pplan = SPI_prepare(query, natts, ctypes);
 623                 if (pplan == NULL)
 624                         elog(ERROR, "ttdummy (%s): SPI_prepare returned %d", relname, SPI_result);
 625
 626                 pplan = SPI_saveplan(pplan);
 627                 if (pplan == NULL)
 628                         elog(ERROR, "ttdummy (%s): SPI_saveplan returned %d", relname, SPI_result);
 629
 630                 splan = pplan;
 631         }
 632
 633         ret = SPI_execp(splan, cvals, cnulls, 0);
 634
 635         if (ret < 0)
 636                 elog(ERROR, "ttdummy (%s): SPI_execp returned %d", relname, ret);
 637
 638         /* Tuple to return to upper Executor ... */
 639         if (newtuple)                           /* UPDATE */
 640         {
 641                 HeapTuple       tmptuple;
 642
 643                 tmptuple = SPI_copytuple(trigtuple);
 644                 rettuple = SPI_modifytuple(rel, tmptuple, 1, &(attnum[1]), &newoff, NULL);
 645                 SPI_freetuple(tmptuple);
 646         }
 647         else
 648 /* DELETE */
 649                 rettuple = trigtuple;
 650
 651         SPI_finish();                           /* don't forget say Bye to SPI mgr */
 652
 653         pfree(relname);
 654
 655         return PointerGetDatum(rettuple);
 656 }
 657
 658 PG_FUNCTION_INFO_V1(set_ttdummy);
 659
 660 Datum
 661 set_ttdummy(PG_FUNCTION_ARGS)
 662 {
 663         int32           on = PG_GETARG_INT32(0);
 664
 665         if (ttoff)                                      /* OFF currently */
 666         {
 667                 if (on == 0)
 668                         PG_RETURN_INT32(0);
 669
 670                 /* turn ON */
 671                 ttoff = false;
 672                 PG_RETURN_INT32(0);
 673         }
 674
 675         /* ON currently */
 676         if (on != 0)
 677                 PG_RETURN_INT32(1);
 678
 679         /* turn OFF */
 680         ttoff = true;
 681
 682         PG_RETURN_INT32(1);
 683 }