LCOV - code coverage report
Current view: top level - src/test/regress - regress.c (source / functions) Hit Total Coverage
Test: PostgreSQL 17beta1 Lines: 433 477 90.8 %
Date: 2024-05-29 12:11:05 Functions: 47 49 95.9 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*------------------------------------------------------------------------
       2             :  *
       3             :  * regress.c
       4             :  *   Code for various C-language functions defined as part of the
       5             :  *   regression tests.
       6             :  *
       7             :  * This code is released under the terms of the PostgreSQL License.
       8             :  *
       9             :  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
      10             :  * Portions Copyright (c) 1994, Regents of the University of California
      11             :  *
      12             :  * src/test/regress/regress.c
      13             :  *
      14             :  *-------------------------------------------------------------------------
      15             :  */
      16             : 
      17             : #include "postgres.h"
      18             : 
      19             : #include <math.h>
      20             : #include <signal.h>
      21             : 
      22             : #include "access/detoast.h"
      23             : #include "access/htup_details.h"
      24             : #include "access/transam.h"
      25             : #include "access/xact.h"
      26             : #include "catalog/namespace.h"
      27             : #include "catalog/pg_operator.h"
      28             : #include "catalog/pg_type.h"
      29             : #include "commands/sequence.h"
      30             : #include "commands/trigger.h"
      31             : #include "executor/executor.h"
      32             : #include "executor/spi.h"
      33             : #include "funcapi.h"
      34             : #include "mb/pg_wchar.h"
      35             : #include "miscadmin.h"
      36             : #include "nodes/supportnodes.h"
      37             : #include "optimizer/optimizer.h"
      38             : #include "optimizer/plancat.h"
      39             : #include "parser/parse_coerce.h"
      40             : #include "port/atomics.h"
      41             : #include "storage/spin.h"
      42             : #include "utils/array.h"
      43             : #include "utils/builtins.h"
      44             : #include "utils/geo_decls.h"
      45             : #include "utils/memutils.h"
      46             : #include "utils/rel.h"
      47             : #include "utils/typcache.h"
      48             : 
      49             : #define EXPECT_TRUE(expr)   \
      50             :     do { \
      51             :         if (!(expr)) \
      52             :             elog(ERROR, \
      53             :                  "%s was unexpectedly false in file \"%s\" line %u", \
      54             :                  #expr, __FILE__, __LINE__); \
      55             :     } while (0)
      56             : 
      57             : #define EXPECT_EQ_U32(result_expr, expected_expr)   \
      58             :     do { \
      59             :         uint32      actual_result = (result_expr); \
      60             :         uint32      expected_result = (expected_expr); \
      61             :         if (actual_result != expected_result) \
      62             :             elog(ERROR, \
      63             :                  "%s yielded %u, expected %s in file \"%s\" line %u", \
      64             :                  #result_expr, actual_result, #expected_expr, __FILE__, __LINE__); \
      65             :     } while (0)
      66             : 
      67             : #define EXPECT_EQ_U64(result_expr, expected_expr)   \
      68             :     do { \
      69             :         uint64      actual_result = (result_expr); \
      70             :         uint64      expected_result = (expected_expr); \
      71             :         if (actual_result != expected_result) \
      72             :             elog(ERROR, \
      73             :                  "%s yielded " UINT64_FORMAT ", expected %s in file \"%s\" line %u", \
      74             :                  #result_expr, actual_result, #expected_expr, __FILE__, __LINE__); \
      75             :     } while (0)
      76             : 
      77             : #define LDELIM          '('
      78             : #define RDELIM          ')'
      79             : #define DELIM           ','
      80             : 
      81             : static void regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2);
      82             : 
      83         110 : PG_MODULE_MAGIC;
      84             : 
      85             : 
      86             : /* return the point where two paths intersect, or NULL if no intersection. */
      87          14 : PG_FUNCTION_INFO_V1(interpt_pp);
      88             : 
      89             : Datum
      90        5376 : interpt_pp(PG_FUNCTION_ARGS)
      91             : {
      92        5376 :     PATH       *p1 = PG_GETARG_PATH_P(0);
      93        5376 :     PATH       *p2 = PG_GETARG_PATH_P(1);
      94             :     int         i,
      95             :                 j;
      96             :     LSEG        seg1,
      97             :                 seg2;
      98             :     bool        found;          /* We've found the intersection */
      99             : 
     100        5376 :     found = false;              /* Haven't found it yet */
     101             : 
     102       17646 :     for (i = 0; i < p1->npts - 1 && !found; i++)
     103             :     {
     104       12270 :         regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
     105       37638 :         for (j = 0; j < p2->npts - 1 && !found; j++)
     106             :         {
     107       25368 :             regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
     108       25368 :             if (DatumGetBool(DirectFunctionCall2(lseg_intersect,
     109             :                                                  LsegPGetDatum(&seg1),
     110             :                                                  LsegPGetDatum(&seg2))))
     111        5364 :                 found = true;
     112             :         }
     113             :     }
     114             : 
     115        5376 :     if (!found)
     116          12 :         PG_RETURN_NULL();
     117             : 
     118             :     /*
     119             :      * Note: DirectFunctionCall2 will kick out an error if lseg_interpt()
     120             :      * returns NULL, but that should be impossible since we know the two
     121             :      * segments intersect.
     122             :      */
     123        5364 :     PG_RETURN_DATUM(DirectFunctionCall2(lseg_interpt,
     124             :                                         LsegPGetDatum(&seg1),
     125             :                                         LsegPGetDatum(&seg2)));
     126             : }
     127             : 
     128             : 
     129             : /* like lseg_construct, but assume space already allocated */
     130             : static void
     131       37638 : regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2)
     132             : {
     133       37638 :     lseg->p[0].x = pt1->x;
     134       37638 :     lseg->p[0].y = pt1->y;
     135       37638 :     lseg->p[1].x = pt2->x;
     136       37638 :     lseg->p[1].y = pt2->y;
     137       37638 : }
     138             : 
     139          14 : PG_FUNCTION_INFO_V1(overpaid);
     140             : 
     141             : Datum
     142          36 : overpaid(PG_FUNCTION_ARGS)
     143             : {
     144          36 :     HeapTupleHeader tuple = PG_GETARG_HEAPTUPLEHEADER(0);
     145             :     bool        isnull;
     146             :     int32       salary;
     147             : 
     148          36 :     salary = DatumGetInt32(GetAttributeByName(tuple, "salary", &isnull));
     149          36 :     if (isnull)
     150           0 :         PG_RETURN_NULL();
     151          36 :     PG_RETURN_BOOL(salary > 699);
     152             : }
     153             : 
     154             : /* New type "widget"
     155             :  * This used to be "circle", but I added circle to builtins,
     156             :  *  so needed to make sure the names do not collide. - tgl 97/04/21
     157             :  */
     158             : 
     159             : typedef struct
     160             : {
     161             :     Point       center;
     162             :     double      radius;
     163             : } WIDGET;
     164             : 
     165          20 : PG_FUNCTION_INFO_V1(widget_in);
     166          14 : PG_FUNCTION_INFO_V1(widget_out);
     167             : 
     168             : #define NARGS   3
     169             : 
     170             : Datum
     171          66 : widget_in(PG_FUNCTION_ARGS)
     172             : {
     173          66 :     char       *str = PG_GETARG_CSTRING(0);
     174             :     char       *p,
     175             :                *coord[NARGS];
     176             :     int         i;
     177             :     WIDGET     *result;
     178             : 
     179         378 :     for (i = 0, p = str; *p && i < NARGS && *p != RDELIM; p++)
     180             :     {
     181         312 :         if (*p == DELIM || (*p == LDELIM && i == 0))
     182         162 :             coord[i++] = p + 1;
     183             :     }
     184             : 
     185             :     /*
     186             :      * Note: DON'T convert this error to "soft" style (errsave/ereturn).  We
     187             :      * want this data type to stay permanently in the hard-error world so that
     188             :      * it can be used for testing that such cases still work reasonably.
     189             :      */
     190          66 :     if (i < NARGS)
     191          24 :         ereport(ERROR,
     192             :                 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
     193             :                  errmsg("invalid input syntax for type %s: \"%s\"",
     194             :                         "widget", str)));
     195             : 
     196          42 :     result = (WIDGET *) palloc(sizeof(WIDGET));
     197          42 :     result->center.x = atof(coord[0]);
     198          42 :     result->center.y = atof(coord[1]);
     199          42 :     result->radius = atof(coord[2]);
     200             : 
     201          42 :     PG_RETURN_POINTER(result);
     202             : }
     203             : 
     204             : Datum
     205          12 : widget_out(PG_FUNCTION_ARGS)
     206             : {
     207          12 :     WIDGET     *widget = (WIDGET *) PG_GETARG_POINTER(0);
     208          12 :     char       *str = psprintf("(%g,%g,%g)",
     209             :                                widget->center.x, widget->center.y, widget->radius);
     210             : 
     211          12 :     PG_RETURN_CSTRING(str);
     212             : }
     213             : 
     214          14 : PG_FUNCTION_INFO_V1(pt_in_widget);
     215             : 
     216             : Datum
     217          12 : pt_in_widget(PG_FUNCTION_ARGS)
     218             : {
     219          12 :     Point      *point = PG_GETARG_POINT_P(0);
     220          12 :     WIDGET     *widget = (WIDGET *) PG_GETARG_POINTER(1);
     221             :     float8      distance;
     222             : 
     223          12 :     distance = DatumGetFloat8(DirectFunctionCall2(point_distance,
     224             :                                                   PointPGetDatum(point),
     225             :                                                   PointPGetDatum(&widget->center)));
     226             : 
     227          12 :     PG_RETURN_BOOL(distance < widget->radius);
     228             : }
     229             : 
     230          14 : PG_FUNCTION_INFO_V1(reverse_name);
     231             : 
     232             : Datum
     233          48 : reverse_name(PG_FUNCTION_ARGS)
     234             : {
     235          48 :     char       *string = PG_GETARG_CSTRING(0);
     236             :     int         i;
     237             :     int         len;
     238             :     char       *new_string;
     239             : 
     240          48 :     new_string = palloc0(NAMEDATALEN);
     241         336 :     for (i = 0; i < NAMEDATALEN && string[i]; ++i)
     242             :         ;
     243          48 :     if (i == NAMEDATALEN || !string[i])
     244          48 :         --i;
     245          48 :     len = i;
     246         336 :     for (; i >= 0; --i)
     247         288 :         new_string[len - i] = string[i];
     248          48 :     PG_RETURN_CSTRING(new_string);
     249             : }
     250             : 
     251          14 : PG_FUNCTION_INFO_V1(trigger_return_old);
     252             : 
     253             : Datum
     254          90 : trigger_return_old(PG_FUNCTION_ARGS)
     255             : {
     256          90 :     TriggerData *trigdata = (TriggerData *) fcinfo->context;
     257             :     HeapTuple   tuple;
     258             : 
     259          90 :     if (!CALLED_AS_TRIGGER(fcinfo))
     260           0 :         elog(ERROR, "trigger_return_old: not fired by trigger manager");
     261             : 
     262          90 :     tuple = trigdata->tg_trigtuple;
     263             : 
     264          90 :     return PointerGetDatum(tuple);
     265             : }
     266             : 
     267             : #define TTDUMMY_INFINITY    999999
     268             : 
     269             : static SPIPlanPtr splan = NULL;
     270             : static bool ttoff = false;
     271             : 
     272          14 : PG_FUNCTION_INFO_V1(ttdummy);
     273             : 
     274             : Datum
     275          60 : ttdummy(PG_FUNCTION_ARGS)
     276             : {
     277          60 :     TriggerData *trigdata = (TriggerData *) fcinfo->context;
     278             :     Trigger    *trigger;        /* to get trigger name */
     279             :     char      **args;           /* arguments */
     280             :     int         attnum[2];      /* fnumbers of start/stop columns */
     281             :     Datum       oldon,
     282             :                 oldoff;
     283             :     Datum       newon,
     284             :                 newoff;
     285             :     Datum      *cvals;          /* column values */
     286             :     char       *cnulls;         /* column nulls */
     287             :     char       *relname;        /* triggered relation name */
     288             :     Relation    rel;            /* triggered relation */
     289             :     HeapTuple   trigtuple;
     290          60 :     HeapTuple   newtuple = NULL;
     291             :     HeapTuple   rettuple;
     292             :     TupleDesc   tupdesc;        /* tuple description */
     293             :     int         natts;          /* # of attributes */
     294             :     bool        isnull;         /* to know is some column NULL or not */
     295             :     int         ret;
     296             :     int         i;
     297             : 
     298          60 :     if (!CALLED_AS_TRIGGER(fcinfo))
     299           0 :         elog(ERROR, "ttdummy: not fired by trigger manager");
     300          60 :     if (!TRIGGER_FIRED_FOR_ROW(trigdata->tg_event))
     301           0 :         elog(ERROR, "ttdummy: must be fired for row");
     302          60 :     if (!TRIGGER_FIRED_BEFORE(trigdata->tg_event))
     303           0 :         elog(ERROR, "ttdummy: must be fired before event");
     304          60 :     if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
     305           0 :         elog(ERROR, "ttdummy: cannot process INSERT event");
     306          60 :     if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
     307          48 :         newtuple = trigdata->tg_newtuple;
     308             : 
     309          60 :     trigtuple = trigdata->tg_trigtuple;
     310             : 
     311          60 :     rel = trigdata->tg_relation;
     312          60 :     relname = SPI_getrelname(rel);
     313             : 
     314             :     /* check if TT is OFF for this relation */
     315          60 :     if (ttoff)                  /* OFF - nothing to do */
     316             :     {
     317          30 :         pfree(relname);
     318          30 :         return PointerGetDatum((newtuple != NULL) ? newtuple : trigtuple);
     319             :     }
     320             : 
     321          30 :     trigger = trigdata->tg_trigger;
     322             : 
     323          30 :     if (trigger->tgnargs != 2)
     324           0 :         elog(ERROR, "ttdummy (%s): invalid (!= 2) number of arguments %d",
     325             :              relname, trigger->tgnargs);
     326             : 
     327          30 :     args = trigger->tgargs;
     328          30 :     tupdesc = rel->rd_att;
     329          30 :     natts = tupdesc->natts;
     330             : 
     331          90 :     for (i = 0; i < 2; i++)
     332             :     {
     333          60 :         attnum[i] = SPI_fnumber(tupdesc, args[i]);
     334          60 :         if (attnum[i] <= 0)
     335           0 :             elog(ERROR, "ttdummy (%s): there is no attribute %s",
     336             :                  relname, args[i]);
     337          60 :         if (SPI_gettypeid(tupdesc, attnum[i]) != INT4OID)
     338           0 :             elog(ERROR, "ttdummy (%s): attribute %s must be of integer type",
     339             :                  relname, args[i]);
     340             :     }
     341             : 
     342          30 :     oldon = SPI_getbinval(trigtuple, tupdesc, attnum[0], &isnull);
     343          30 :     if (isnull)
     344           0 :         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
     345             : 
     346          30 :     oldoff = SPI_getbinval(trigtuple, tupdesc, attnum[1], &isnull);
     347          30 :     if (isnull)
     348           0 :         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
     349             : 
     350          30 :     if (newtuple != NULL)       /* UPDATE */
     351             :     {
     352          24 :         newon = SPI_getbinval(newtuple, tupdesc, attnum[0], &isnull);
     353          24 :         if (isnull)
     354           0 :             elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
     355          24 :         newoff = SPI_getbinval(newtuple, tupdesc, attnum[1], &isnull);
     356          24 :         if (isnull)
     357           0 :             elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
     358             : 
     359          24 :         if (oldon != newon || oldoff != newoff)
     360           6 :             ereport(ERROR,
     361             :                     (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     362             :                      errmsg("ttdummy (%s): you cannot change %s and/or %s columns (use set_ttdummy)",
     363             :                             relname, args[0], args[1])));
     364             : 
     365          18 :         if (newoff != TTDUMMY_INFINITY)
     366             :         {
     367           6 :             pfree(relname);     /* allocated in upper executor context */
     368           6 :             return PointerGetDatum(NULL);
     369             :         }
     370             :     }
     371           6 :     else if (oldoff != TTDUMMY_INFINITY)    /* DELETE */
     372             :     {
     373           0 :         pfree(relname);
     374           0 :         return PointerGetDatum(NULL);
     375             :     }
     376             : 
     377          18 :     newoff = DirectFunctionCall1(nextval, CStringGetTextDatum("ttdummy_seq"));
     378             :     /* nextval now returns int64; coerce down to int32 */
     379          18 :     newoff = Int32GetDatum((int32) DatumGetInt64(newoff));
     380             : 
     381             :     /* Connect to SPI manager */
     382          18 :     if ((ret = SPI_connect()) < 0)
     383           0 :         elog(ERROR, "ttdummy (%s): SPI_connect returned %d", relname, ret);
     384             : 
     385             :     /* Fetch tuple values and nulls */
     386          18 :     cvals = (Datum *) palloc(natts * sizeof(Datum));
     387          18 :     cnulls = (char *) palloc(natts * sizeof(char));
     388          90 :     for (i = 0; i < natts; i++)
     389             :     {
     390          72 :         cvals[i] = SPI_getbinval((newtuple != NULL) ? newtuple : trigtuple,
     391             :                                  tupdesc, i + 1, &isnull);
     392          72 :         cnulls[i] = (isnull) ? 'n' : ' ';
     393             :     }
     394             : 
     395             :     /* change date column(s) */
     396          18 :     if (newtuple)               /* UPDATE */
     397             :     {
     398          12 :         cvals[attnum[0] - 1] = newoff;  /* start_date eq current date */
     399          12 :         cnulls[attnum[0] - 1] = ' ';
     400          12 :         cvals[attnum[1] - 1] = TTDUMMY_INFINITY;    /* stop_date eq INFINITY */
     401          12 :         cnulls[attnum[1] - 1] = ' ';
     402             :     }
     403             :     else
     404             :         /* DELETE */
     405             :     {
     406           6 :         cvals[attnum[1] - 1] = newoff;  /* stop_date eq current date */
     407           6 :         cnulls[attnum[1] - 1] = ' ';
     408             :     }
     409             : 
     410             :     /* if there is no plan ... */
     411          18 :     if (splan == NULL)
     412             :     {
     413             :         SPIPlanPtr  pplan;
     414             :         Oid        *ctypes;
     415             :         char       *query;
     416             : 
     417             :         /* allocate space in preparation */
     418           6 :         ctypes = (Oid *) palloc(natts * sizeof(Oid));
     419           6 :         query = (char *) palloc(100 + 16 * natts);
     420             : 
     421             :         /*
     422             :          * Construct query: INSERT INTO _relation_ VALUES ($1, ...)
     423             :          */
     424           6 :         sprintf(query, "INSERT INTO %s VALUES (", relname);
     425          30 :         for (i = 1; i <= natts; i++)
     426             :         {
     427          24 :             sprintf(query + strlen(query), "$%d%s",
     428             :                     i, (i < natts) ? ", " : ")");
     429          24 :             ctypes[i - 1] = SPI_gettypeid(tupdesc, i);
     430             :         }
     431             : 
     432             :         /* Prepare plan for query */
     433           6 :         pplan = SPI_prepare(query, natts, ctypes);
     434           6 :         if (pplan == NULL)
     435           0 :             elog(ERROR, "ttdummy (%s): SPI_prepare returned %s", relname, SPI_result_code_string(SPI_result));
     436             : 
     437           6 :         if (SPI_keepplan(pplan))
     438           0 :             elog(ERROR, "ttdummy (%s): SPI_keepplan failed", relname);
     439             : 
     440           6 :         splan = pplan;
     441             :     }
     442             : 
     443          18 :     ret = SPI_execp(splan, cvals, cnulls, 0);
     444             : 
     445          18 :     if (ret < 0)
     446           0 :         elog(ERROR, "ttdummy (%s): SPI_execp returned %d", relname, ret);
     447             : 
     448             :     /* Tuple to return to upper Executor ... */
     449          18 :     if (newtuple)               /* UPDATE */
     450          12 :         rettuple = SPI_modifytuple(rel, trigtuple, 1, &(attnum[1]), &newoff, NULL);
     451             :     else                        /* DELETE */
     452           6 :         rettuple = trigtuple;
     453             : 
     454          18 :     SPI_finish();               /* don't forget say Bye to SPI mgr */
     455             : 
     456          18 :     pfree(relname);
     457             : 
     458          18 :     return PointerGetDatum(rettuple);
     459             : }
     460             : 
     461          14 : PG_FUNCTION_INFO_V1(set_ttdummy);
     462             : 
     463             : Datum
     464          18 : set_ttdummy(PG_FUNCTION_ARGS)
     465             : {
     466          18 :     int32       on = PG_GETARG_INT32(0);
     467             : 
     468          18 :     if (ttoff)                  /* OFF currently */
     469             :     {
     470           6 :         if (on == 0)
     471           0 :             PG_RETURN_INT32(0);
     472             : 
     473             :         /* turn ON */
     474           6 :         ttoff = false;
     475           6 :         PG_RETURN_INT32(0);
     476             :     }
     477             : 
     478             :     /* ON currently */
     479          12 :     if (on != 0)
     480           0 :         PG_RETURN_INT32(1);
     481             : 
     482             :     /* turn OFF */
     483          12 :     ttoff = true;
     484             : 
     485          12 :     PG_RETURN_INT32(1);
     486             : }
     487             : 
     488             : 
     489             : /*
     490             :  * Type int44 has no real-world use, but the regression tests use it
     491             :  * (under the alias "city_budget").  It's a four-element vector of int4's.
     492             :  */
     493             : 
     494             : /*
     495             :  *      int44in         - converts "num, num, ..." to internal form
     496             :  *
     497             :  *      Note: Fills any missing positions with zeroes.
     498             :  */
     499          14 : PG_FUNCTION_INFO_V1(int44in);
     500             : 
     501             : Datum
     502          12 : int44in(PG_FUNCTION_ARGS)
     503             : {
     504          12 :     char       *input_string = PG_GETARG_CSTRING(0);
     505          12 :     int32      *result = (int32 *) palloc(4 * sizeof(int32));
     506             :     int         i;
     507             : 
     508          12 :     i = sscanf(input_string,
     509             :                "%d, %d, %d, %d",
     510             :                &result[0],
     511             :                &result[1],
     512             :                &result[2],
     513             :                &result[3]);
     514          18 :     while (i < 4)
     515           6 :         result[i++] = 0;
     516             : 
     517          12 :     PG_RETURN_POINTER(result);
     518             : }
     519             : 
     520             : /*
     521             :  *      int44out        - converts internal form to "num, num, ..."
     522             :  */
     523          22 : PG_FUNCTION_INFO_V1(int44out);
     524             : 
     525             : Datum
     526          28 : int44out(PG_FUNCTION_ARGS)
     527             : {
     528          28 :     int32      *an_array = (int32 *) PG_GETARG_POINTER(0);
     529          28 :     char       *result = (char *) palloc(16 * 4);
     530             : 
     531          28 :     snprintf(result, 16 * 4, "%d,%d,%d,%d",
     532             :              an_array[0],
     533          28 :              an_array[1],
     534          28 :              an_array[2],
     535          28 :              an_array[3]);
     536             : 
     537          28 :     PG_RETURN_CSTRING(result);
     538             : }
     539             : 
     540          14 : PG_FUNCTION_INFO_V1(test_canonicalize_path);
     541             : Datum
     542         132 : test_canonicalize_path(PG_FUNCTION_ARGS)
     543             : {
     544         132 :     char       *path = text_to_cstring(PG_GETARG_TEXT_PP(0));
     545             : 
     546         132 :     canonicalize_path(path);
     547         132 :     PG_RETURN_TEXT_P(cstring_to_text(path));
     548             : }
     549             : 
     550          14 : PG_FUNCTION_INFO_V1(make_tuple_indirect);
     551             : Datum
     552         126 : make_tuple_indirect(PG_FUNCTION_ARGS)
     553             : {
     554         126 :     HeapTupleHeader rec = PG_GETARG_HEAPTUPLEHEADER(0);
     555             :     HeapTupleData tuple;
     556             :     int         ncolumns;
     557             :     Datum      *values;
     558             :     bool       *nulls;
     559             : 
     560             :     Oid         tupType;
     561             :     int32       tupTypmod;
     562             :     TupleDesc   tupdesc;
     563             : 
     564             :     HeapTuple   newtup;
     565             : 
     566             :     int         i;
     567             : 
     568             :     MemoryContext old_context;
     569             : 
     570             :     /* Extract type info from the tuple itself */
     571         126 :     tupType = HeapTupleHeaderGetTypeId(rec);
     572         126 :     tupTypmod = HeapTupleHeaderGetTypMod(rec);
     573         126 :     tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
     574         126 :     ncolumns = tupdesc->natts;
     575             : 
     576             :     /* Build a temporary HeapTuple control structure */
     577         126 :     tuple.t_len = HeapTupleHeaderGetDatumLength(rec);
     578         126 :     ItemPointerSetInvalid(&(tuple.t_self));
     579         126 :     tuple.t_tableOid = InvalidOid;
     580         126 :     tuple.t_data = rec;
     581             : 
     582         126 :     values = (Datum *) palloc(ncolumns * sizeof(Datum));
     583         126 :     nulls = (bool *) palloc(ncolumns * sizeof(bool));
     584             : 
     585         126 :     heap_deform_tuple(&tuple, tupdesc, values, nulls);
     586             : 
     587         126 :     old_context = MemoryContextSwitchTo(TopTransactionContext);
     588             : 
     589         630 :     for (i = 0; i < ncolumns; i++)
     590             :     {
     591             :         struct varlena *attr;
     592             :         struct varlena *new_attr;
     593             :         struct varatt_indirect redirect_pointer;
     594             : 
     595             :         /* only work on existing, not-null varlenas */
     596         504 :         if (TupleDescAttr(tupdesc, i)->attisdropped ||
     597         504 :             nulls[i] ||
     598         438 :             TupleDescAttr(tupdesc, i)->attlen != -1)
     599         192 :             continue;
     600             : 
     601         312 :         attr = (struct varlena *) DatumGetPointer(values[i]);
     602             : 
     603             :         /* don't recursively indirect */
     604         312 :         if (VARATT_IS_EXTERNAL_INDIRECT(attr))
     605           0 :             continue;
     606             : 
     607             :         /* copy datum, so it still lives later */
     608         312 :         if (VARATT_IS_EXTERNAL_ONDISK(attr))
     609           0 :             attr = detoast_external_attr(attr);
     610             :         else
     611             :         {
     612         312 :             struct varlena *oldattr = attr;
     613             : 
     614         312 :             attr = palloc0(VARSIZE_ANY(oldattr));
     615         312 :             memcpy(attr, oldattr, VARSIZE_ANY(oldattr));
     616             :         }
     617             : 
     618             :         /* build indirection Datum */
     619         312 :         new_attr = (struct varlena *) palloc0(INDIRECT_POINTER_SIZE);
     620         312 :         redirect_pointer.pointer = attr;
     621         312 :         SET_VARTAG_EXTERNAL(new_attr, VARTAG_INDIRECT);
     622         312 :         memcpy(VARDATA_EXTERNAL(new_attr), &redirect_pointer,
     623             :                sizeof(redirect_pointer));
     624             : 
     625         312 :         values[i] = PointerGetDatum(new_attr);
     626             :     }
     627             : 
     628         126 :     newtup = heap_form_tuple(tupdesc, values, nulls);
     629         126 :     pfree(values);
     630         126 :     pfree(nulls);
     631         126 :     ReleaseTupleDesc(tupdesc);
     632             : 
     633         126 :     MemoryContextSwitchTo(old_context);
     634             : 
     635             :     /*
     636             :      * We intentionally don't use PG_RETURN_HEAPTUPLEHEADER here, because that
     637             :      * would cause the indirect toast pointers to be flattened out of the
     638             :      * tuple immediately, rendering subsequent testing irrelevant.  So just
     639             :      * return the HeapTupleHeader pointer as-is.  This violates the general
     640             :      * rule that composite Datums shouldn't contain toast pointers, but so
     641             :      * long as the regression test scripts don't insert the result of this
     642             :      * function into a container type (record, array, etc) it should be OK.
     643             :      */
     644         126 :     PG_RETURN_POINTER(newtup->t_data);
     645             : }
     646             : 
     647           4 : PG_FUNCTION_INFO_V1(regress_setenv);
     648             : 
     649             : Datum
     650           2 : regress_setenv(PG_FUNCTION_ARGS)
     651             : {
     652           2 :     char       *envvar = text_to_cstring(PG_GETARG_TEXT_PP(0));
     653           2 :     char       *envval = text_to_cstring(PG_GETARG_TEXT_PP(1));
     654             : 
     655           2 :     if (!superuser())
     656           0 :         elog(ERROR, "must be superuser to change environment variables");
     657             : 
     658           2 :     if (setenv(envvar, envval, 1) != 0)
     659           0 :         elog(ERROR, "could not set environment variable: %m");
     660             : 
     661           2 :     PG_RETURN_VOID();
     662             : }
     663             : 
     664             : /* Sleep until no process has a given PID. */
     665           6 : PG_FUNCTION_INFO_V1(wait_pid);
     666             : 
     667             : Datum
     668           2 : wait_pid(PG_FUNCTION_ARGS)
     669             : {
     670           2 :     int         pid = PG_GETARG_INT32(0);
     671             : 
     672           2 :     if (!superuser())
     673           0 :         elog(ERROR, "must be superuser to check PID liveness");
     674             : 
     675           6 :     while (kill(pid, 0) == 0)
     676             :     {
     677           4 :         CHECK_FOR_INTERRUPTS();
     678           4 :         pg_usleep(50000);
     679             :     }
     680             : 
     681           2 :     if (errno != ESRCH)
     682           0 :         elog(ERROR, "could not check PID %d liveness: %m", pid);
     683             : 
     684           2 :     PG_RETURN_VOID();
     685             : }
     686             : 
     687             : static void
     688           6 : test_atomic_flag(void)
     689             : {
     690             :     pg_atomic_flag flag;
     691             : 
     692           6 :     pg_atomic_init_flag(&flag);
     693           6 :     EXPECT_TRUE(pg_atomic_unlocked_test_flag(&flag));
     694           6 :     EXPECT_TRUE(pg_atomic_test_set_flag(&flag));
     695           6 :     EXPECT_TRUE(!pg_atomic_unlocked_test_flag(&flag));
     696           6 :     EXPECT_TRUE(!pg_atomic_test_set_flag(&flag));
     697           6 :     pg_atomic_clear_flag(&flag);
     698           6 :     EXPECT_TRUE(pg_atomic_unlocked_test_flag(&flag));
     699           6 :     EXPECT_TRUE(pg_atomic_test_set_flag(&flag));
     700           6 :     pg_atomic_clear_flag(&flag);
     701           6 : }
     702             : 
     703             : static void
     704           6 : test_atomic_uint32(void)
     705             : {
     706             :     pg_atomic_uint32 var;
     707             :     uint32      expected;
     708             :     int         i;
     709             : 
     710           6 :     pg_atomic_init_u32(&var, 0);
     711           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), 0);
     712           6 :     pg_atomic_write_u32(&var, 3);
     713           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), 3);
     714           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, pg_atomic_read_u32(&var) - 2),
     715             :                   3);
     716           6 :     EXPECT_EQ_U32(pg_atomic_fetch_sub_u32(&var, 1), 4);
     717           6 :     EXPECT_EQ_U32(pg_atomic_sub_fetch_u32(&var, 3), 0);
     718           6 :     EXPECT_EQ_U32(pg_atomic_add_fetch_u32(&var, 10), 10);
     719           6 :     EXPECT_EQ_U32(pg_atomic_exchange_u32(&var, 5), 10);
     720           6 :     EXPECT_EQ_U32(pg_atomic_exchange_u32(&var, 0), 5);
     721             : 
     722             :     /* test around numerical limits */
     723           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, INT_MAX), 0);
     724           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, INT_MAX), INT_MAX);
     725           6 :     pg_atomic_fetch_add_u32(&var, 2);   /* wrap to 0 */
     726           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, PG_INT16_MAX), 0);
     727           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, PG_INT16_MAX + 1),
     728             :                   PG_INT16_MAX);
     729           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, PG_INT16_MIN),
     730             :                   2 * PG_INT16_MAX + 1);
     731           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, PG_INT16_MIN - 1),
     732             :                   PG_INT16_MAX);
     733           6 :     pg_atomic_fetch_add_u32(&var, 1);   /* top up to UINT_MAX */
     734           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), UINT_MAX);
     735           6 :     EXPECT_EQ_U32(pg_atomic_fetch_sub_u32(&var, INT_MAX), UINT_MAX);
     736           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), (uint32) INT_MAX + 1);
     737           6 :     EXPECT_EQ_U32(pg_atomic_sub_fetch_u32(&var, INT_MAX), 1);
     738           6 :     pg_atomic_sub_fetch_u32(&var, 1);
     739           6 :     expected = PG_INT16_MAX;
     740           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     741           6 :     expected = PG_INT16_MAX + 1;
     742           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     743           6 :     expected = PG_INT16_MIN;
     744           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     745           6 :     expected = PG_INT16_MIN - 1;
     746           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     747             : 
     748             :     /* fail exchange because of old expected */
     749           6 :     expected = 10;
     750           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     751             : 
     752             :     /* CAS is allowed to fail due to interrupts, try a couple of times */
     753          12 :     for (i = 0; i < 1000; i++)
     754             :     {
     755          12 :         expected = 0;
     756          12 :         if (!pg_atomic_compare_exchange_u32(&var, &expected, 1))
     757           6 :             break;
     758             :     }
     759           6 :     if (i == 1000)
     760           0 :         elog(ERROR, "atomic_compare_exchange_u32() never succeeded");
     761           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), 1);
     762           6 :     pg_atomic_write_u32(&var, 0);
     763             : 
     764             :     /* try setting flagbits */
     765           6 :     EXPECT_TRUE(!(pg_atomic_fetch_or_u32(&var, 1) & 1));
     766           6 :     EXPECT_TRUE(pg_atomic_fetch_or_u32(&var, 2) & 1);
     767           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), 3);
     768             :     /* try clearing flagbits */
     769           6 :     EXPECT_EQ_U32(pg_atomic_fetch_and_u32(&var, ~2) & 3, 3);
     770           6 :     EXPECT_EQ_U32(pg_atomic_fetch_and_u32(&var, ~1), 1);
     771             :     /* no bits set anymore */
     772           6 :     EXPECT_EQ_U32(pg_atomic_fetch_and_u32(&var, ~0), 0);
     773           6 : }
     774             : 
     775             : static void
     776           6 : test_atomic_uint64(void)
     777             : {
     778             :     pg_atomic_uint64 var;
     779             :     uint64      expected;
     780             :     int         i;
     781             : 
     782           6 :     pg_atomic_init_u64(&var, 0);
     783           6 :     EXPECT_EQ_U64(pg_atomic_read_u64(&var), 0);
     784           6 :     pg_atomic_write_u64(&var, 3);
     785           6 :     EXPECT_EQ_U64(pg_atomic_read_u64(&var), 3);
     786           6 :     EXPECT_EQ_U64(pg_atomic_fetch_add_u64(&var, pg_atomic_read_u64(&var) - 2),
     787             :                   3);
     788           6 :     EXPECT_EQ_U64(pg_atomic_fetch_sub_u64(&var, 1), 4);
     789           6 :     EXPECT_EQ_U64(pg_atomic_sub_fetch_u64(&var, 3), 0);
     790           6 :     EXPECT_EQ_U64(pg_atomic_add_fetch_u64(&var, 10), 10);
     791           6 :     EXPECT_EQ_U64(pg_atomic_exchange_u64(&var, 5), 10);
     792           6 :     EXPECT_EQ_U64(pg_atomic_exchange_u64(&var, 0), 5);
     793             : 
     794             :     /* fail exchange because of old expected */
     795           6 :     expected = 10;
     796           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u64(&var, &expected, 1));
     797             : 
     798             :     /* CAS is allowed to fail due to interrupts, try a couple of times */
     799          12 :     for (i = 0; i < 100; i++)
     800             :     {
     801          12 :         expected = 0;
     802          12 :         if (!pg_atomic_compare_exchange_u64(&var, &expected, 1))
     803           6 :             break;
     804             :     }
     805           6 :     if (i == 100)
     806           0 :         elog(ERROR, "atomic_compare_exchange_u64() never succeeded");
     807           6 :     EXPECT_EQ_U64(pg_atomic_read_u64(&var), 1);
     808             : 
     809           6 :     pg_atomic_write_u64(&var, 0);
     810             : 
     811             :     /* try setting flagbits */
     812           6 :     EXPECT_TRUE(!(pg_atomic_fetch_or_u64(&var, 1) & 1));
     813           6 :     EXPECT_TRUE(pg_atomic_fetch_or_u64(&var, 2) & 1);
     814           6 :     EXPECT_EQ_U64(pg_atomic_read_u64(&var), 3);
     815             :     /* try clearing flagbits */
     816           6 :     EXPECT_EQ_U64((pg_atomic_fetch_and_u64(&var, ~2) & 3), 3);
     817           6 :     EXPECT_EQ_U64(pg_atomic_fetch_and_u64(&var, ~1), 1);
     818             :     /* no bits set anymore */
     819           6 :     EXPECT_EQ_U64(pg_atomic_fetch_and_u64(&var, ~0), 0);
     820           6 : }
     821             : 
     822             : /*
     823             :  * Perform, fairly minimal, testing of the spinlock implementation.
     824             :  *
     825             :  * It's likely worth expanding these to actually test concurrency etc, but
     826             :  * having some regularly run tests is better than none.
     827             :  */
     828             : static void
     829           6 : test_spinlock(void)
     830             : {
     831             :     /*
     832             :      * Basic tests for spinlocks, as well as the underlying operations.
     833             :      *
     834             :      * We embed the spinlock in a struct with other members to test that the
     835             :      * spinlock operations don't perform too wide writes.
     836             :      */
     837             :     {
     838             :         struct test_lock_struct
     839             :         {
     840             :             char        data_before[4];
     841             :             slock_t     lock;
     842             :             char        data_after[4];
     843             :         }           struct_w_lock;
     844             : 
     845           6 :         memcpy(struct_w_lock.data_before, "abcd", 4);
     846           6 :         memcpy(struct_w_lock.data_after, "ef12", 4);
     847             : 
     848             :         /* test basic operations via the SpinLock* API */
     849           6 :         SpinLockInit(&struct_w_lock.lock);
     850           6 :         SpinLockAcquire(&struct_w_lock.lock);
     851           6 :         SpinLockRelease(&struct_w_lock.lock);
     852             : 
     853             :         /* test basic operations via underlying S_* API */
     854           6 :         S_INIT_LOCK(&struct_w_lock.lock);
     855           6 :         S_LOCK(&struct_w_lock.lock);
     856           6 :         S_UNLOCK(&struct_w_lock.lock);
     857             : 
     858             :         /* and that "contended" acquisition works */
     859           6 :         s_lock(&struct_w_lock.lock, "testfile", 17, "testfunc");
     860           6 :         S_UNLOCK(&struct_w_lock.lock);
     861             : 
     862             :         /*
     863             :          * Check, using TAS directly, that a single spin cycle doesn't block
     864             :          * when acquiring an already acquired lock.
     865             :          */
     866             : #ifdef TAS
     867           6 :         S_LOCK(&struct_w_lock.lock);
     868             : 
     869           6 :         if (!TAS(&struct_w_lock.lock))
     870           0 :             elog(ERROR, "acquired already held spinlock");
     871             : 
     872             : #ifdef TAS_SPIN
     873           6 :         if (!TAS_SPIN(&struct_w_lock.lock))
     874           0 :             elog(ERROR, "acquired already held spinlock");
     875             : #endif                          /* defined(TAS_SPIN) */
     876             : 
     877           6 :         S_UNLOCK(&struct_w_lock.lock);
     878             : #endif                          /* defined(TAS) */
     879             : 
     880             :         /*
     881             :          * Verify that after all of this the non-lock contents are still
     882             :          * correct.
     883             :          */
     884           6 :         if (memcmp(struct_w_lock.data_before, "abcd", 4) != 0)
     885           0 :             elog(ERROR, "padding before spinlock modified");
     886           6 :         if (memcmp(struct_w_lock.data_after, "ef12", 4) != 0)
     887           0 :             elog(ERROR, "padding after spinlock modified");
     888             :     }
     889             : 
     890             :     /*
     891             :      * Ensure that allocating more than INT32_MAX emulated spinlocks works.
     892             :      * That's interesting because the spinlock emulation uses a 32bit integer
     893             :      * to map spinlocks onto semaphores. There've been bugs...
     894             :      */
     895             : #ifndef HAVE_SPINLOCKS
     896             :     {
     897             :         /*
     898             :          * Initialize enough spinlocks to advance counter close to wraparound.
     899             :          * It's too expensive to perform acquire/release for each, as those
     900             :          * may be syscalls when the spinlock emulation is used (and even just
     901             :          * atomic TAS would be expensive).
     902             :          */
     903             :         for (uint32 i = 0; i < INT32_MAX - 100000; i++)
     904             :         {
     905             :             slock_t     lock;
     906             : 
     907             :             SpinLockInit(&lock);
     908             :         }
     909             : 
     910             :         for (uint32 i = 0; i < 200000; i++)
     911             :         {
     912             :             slock_t     lock;
     913             : 
     914             :             SpinLockInit(&lock);
     915             : 
     916             :             SpinLockAcquire(&lock);
     917             :             SpinLockRelease(&lock);
     918             :             SpinLockAcquire(&lock);
     919             :             SpinLockRelease(&lock);
     920             :         }
     921             :     }
     922             : #endif
     923           6 : }
     924             : 
     925             : /*
     926             :  * Verify that performing atomic ops inside a spinlock isn't a
     927             :  * problem. Realistically that's only going to be a problem when both
     928             :  * --disable-spinlocks and --disable-atomics are used, but it's cheap enough
     929             :  * to just always test.
     930             :  *
     931             :  * The test works by initializing enough atomics that we'd conflict if there
     932             :  * were an overlap between a spinlock and an atomic by holding a spinlock
     933             :  * while manipulating more than NUM_SPINLOCK_SEMAPHORES atomics.
     934             :  *
     935             :  * NUM_TEST_ATOMICS doesn't really need to be more than
     936             :  * NUM_SPINLOCK_SEMAPHORES, but it seems better to test a bit more
     937             :  * extensively.
     938             :  */
     939             : static void
     940           6 : test_atomic_spin_nest(void)
     941             : {
     942             :     slock_t     lock;
     943             : #define NUM_TEST_ATOMICS (NUM_SPINLOCK_SEMAPHORES + NUM_ATOMICS_SEMAPHORES + 27)
     944             :     pg_atomic_uint32 atomics32[NUM_TEST_ATOMICS];
     945             :     pg_atomic_uint64 atomics64[NUM_TEST_ATOMICS];
     946             : 
     947           6 :     SpinLockInit(&lock);
     948             : 
     949        1320 :     for (int i = 0; i < NUM_TEST_ATOMICS; i++)
     950             :     {
     951        1314 :         pg_atomic_init_u32(&atomics32[i], 0);
     952        1314 :         pg_atomic_init_u64(&atomics64[i], 0);
     953             :     }
     954             : 
     955             :     /* just so it's not all zeroes */
     956        1320 :     for (int i = 0; i < NUM_TEST_ATOMICS; i++)
     957             :     {
     958        1314 :         EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&atomics32[i], i), 0);
     959        1314 :         EXPECT_EQ_U64(pg_atomic_fetch_add_u64(&atomics64[i], i), 0);
     960             :     }
     961             : 
     962             :     /* test whether we can do atomic op with lock held */
     963           6 :     SpinLockAcquire(&lock);
     964        1320 :     for (int i = 0; i < NUM_TEST_ATOMICS; i++)
     965             :     {
     966        1314 :         EXPECT_EQ_U32(pg_atomic_fetch_sub_u32(&atomics32[i], i), i);
     967        1314 :         EXPECT_EQ_U32(pg_atomic_read_u32(&atomics32[i]), 0);
     968        1314 :         EXPECT_EQ_U64(pg_atomic_fetch_sub_u64(&atomics64[i], i), i);
     969        1314 :         EXPECT_EQ_U64(pg_atomic_read_u64(&atomics64[i]), 0);
     970             :     }
     971           6 :     SpinLockRelease(&lock);
     972           6 : }
     973             : #undef NUM_TEST_ATOMICS
     974             : 
     975          14 : PG_FUNCTION_INFO_V1(test_atomic_ops);
     976             : Datum
     977           6 : test_atomic_ops(PG_FUNCTION_ARGS)
     978             : {
     979           6 :     test_atomic_flag();
     980             : 
     981           6 :     test_atomic_uint32();
     982             : 
     983           6 :     test_atomic_uint64();
     984             : 
     985             :     /*
     986             :      * Arguably this shouldn't be tested as part of this function, but it's
     987             :      * closely enough related that that seems ok for now.
     988             :      */
     989           6 :     test_spinlock();
     990             : 
     991           6 :     test_atomic_spin_nest();
     992             : 
     993           6 :     PG_RETURN_BOOL(true);
     994             : }
     995             : 
     996           8 : PG_FUNCTION_INFO_V1(test_fdw_handler);
     997             : Datum
     998           0 : test_fdw_handler(PG_FUNCTION_ARGS)
     999             : {
    1000           0 :     elog(ERROR, "test_fdw_handler is not implemented");
    1001             :     PG_RETURN_NULL();
    1002             : }
    1003             : 
    1004          14 : PG_FUNCTION_INFO_V1(test_support_func);
    1005             : Datum
    1006          60 : test_support_func(PG_FUNCTION_ARGS)
    1007             : {
    1008          60 :     Node       *rawreq = (Node *) PG_GETARG_POINTER(0);
    1009          60 :     Node       *ret = NULL;
    1010             : 
    1011          60 :     if (IsA(rawreq, SupportRequestSelectivity))
    1012             :     {
    1013             :         /*
    1014             :          * Assume that the target is int4eq; that's safe as long as we don't
    1015             :          * attach this to any other boolean-returning function.
    1016             :          */
    1017           6 :         SupportRequestSelectivity *req = (SupportRequestSelectivity *) rawreq;
    1018             :         Selectivity s1;
    1019             : 
    1020           6 :         if (req->is_join)
    1021           0 :             s1 = join_selectivity(req->root, Int4EqualOperator,
    1022             :                                   req->args,
    1023             :                                   req->inputcollid,
    1024             :                                   req->jointype,
    1025           0 :                                   req->sjinfo);
    1026             :         else
    1027           6 :             s1 = restriction_selectivity(req->root, Int4EqualOperator,
    1028             :                                          req->args,
    1029             :                                          req->inputcollid,
    1030             :                                          req->varRelid);
    1031             : 
    1032           6 :         req->selectivity = s1;
    1033           6 :         ret = (Node *) req;
    1034             :     }
    1035             : 
    1036          60 :     if (IsA(rawreq, SupportRequestCost))
    1037             :     {
    1038             :         /* Provide some generic estimate */
    1039          18 :         SupportRequestCost *req = (SupportRequestCost *) rawreq;
    1040             : 
    1041          18 :         req->startup = 0;
    1042          18 :         req->per_tuple = 2 * cpu_operator_cost;
    1043          18 :         ret = (Node *) req;
    1044             :     }
    1045             : 
    1046          60 :     if (IsA(rawreq, SupportRequestRows))
    1047             :     {
    1048             :         /*
    1049             :          * Assume that the target is generate_series_int4; that's safe as long
    1050             :          * as we don't attach this to any other set-returning function.
    1051             :          */
    1052          12 :         SupportRequestRows *req = (SupportRequestRows *) rawreq;
    1053             : 
    1054          12 :         if (req->node && IsA(req->node, FuncExpr))    /* be paranoid */
    1055             :         {
    1056          12 :             List       *args = ((FuncExpr *) req->node)->args;
    1057          12 :             Node       *arg1 = linitial(args);
    1058          12 :             Node       *arg2 = lsecond(args);
    1059             : 
    1060          12 :             if (IsA(arg1, Const) &&
    1061          12 :                 !((Const *) arg1)->constisnull &&
    1062          12 :                 IsA(arg2, Const) &&
    1063          12 :                 !((Const *) arg2)->constisnull)
    1064             :             {
    1065          12 :                 int32       val1 = DatumGetInt32(((Const *) arg1)->constvalue);
    1066          12 :                 int32       val2 = DatumGetInt32(((Const *) arg2)->constvalue);
    1067             : 
    1068          12 :                 req->rows = val2 - val1 + 1;
    1069          12 :                 ret = (Node *) req;
    1070             :             }
    1071             :         }
    1072             :     }
    1073             : 
    1074          60 :     PG_RETURN_POINTER(ret);
    1075             : }
    1076             : 
    1077           8 : PG_FUNCTION_INFO_V1(test_opclass_options_func);
    1078             : Datum
    1079           0 : test_opclass_options_func(PG_FUNCTION_ARGS)
    1080             : {
    1081           0 :     PG_RETURN_NULL();
    1082             : }
    1083             : 
    1084             : /*
    1085             :  * Call an encoding conversion or verification function.
    1086             :  *
    1087             :  * Arguments:
    1088             :  *  string    bytea -- string to convert
    1089             :  *  src_enc   name  -- source encoding
    1090             :  *  dest_enc  name  -- destination encoding
    1091             :  *  noError   bool  -- if set, don't ereport() on invalid or untranslatable
    1092             :  *                     input
    1093             :  *
    1094             :  * Result is a tuple with two attributes:
    1095             :  *  int4    -- number of input bytes successfully converted
    1096             :  *  bytea   -- converted string
    1097             :  */
    1098          14 : PG_FUNCTION_INFO_V1(test_enc_conversion);
    1099             : Datum
    1100        9798 : test_enc_conversion(PG_FUNCTION_ARGS)
    1101             : {
    1102        9798 :     bytea      *string = PG_GETARG_BYTEA_PP(0);
    1103        9798 :     char       *src_encoding_name = NameStr(*PG_GETARG_NAME(1));
    1104        9798 :     int         src_encoding = pg_char_to_encoding(src_encoding_name);
    1105        9798 :     char       *dest_encoding_name = NameStr(*PG_GETARG_NAME(2));
    1106        9798 :     int         dest_encoding = pg_char_to_encoding(dest_encoding_name);
    1107        9798 :     bool        noError = PG_GETARG_BOOL(3);
    1108             :     TupleDesc   tupdesc;
    1109             :     char       *src;
    1110             :     char       *dst;
    1111             :     bytea      *retval;
    1112             :     Size        srclen;
    1113             :     Size        dstsize;
    1114             :     Oid         proc;
    1115             :     int         convertedbytes;
    1116             :     int         dstlen;
    1117             :     Datum       values[2];
    1118        9798 :     bool        nulls[2] = {0};
    1119             :     HeapTuple   tuple;
    1120             : 
    1121        9798 :     if (src_encoding < 0)
    1122           0 :         ereport(ERROR,
    1123             :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
    1124             :                  errmsg("invalid source encoding name \"%s\"",
    1125             :                         src_encoding_name)));
    1126        9798 :     if (dest_encoding < 0)
    1127           0 :         ereport(ERROR,
    1128             :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
    1129             :                  errmsg("invalid destination encoding name \"%s\"",
    1130             :                         dest_encoding_name)));
    1131             : 
    1132             :     /* Build a tuple descriptor for our result type */
    1133        9798 :     if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
    1134           0 :         elog(ERROR, "return type must be a row type");
    1135        9798 :     tupdesc = BlessTupleDesc(tupdesc);
    1136             : 
    1137        9798 :     srclen = VARSIZE_ANY_EXHDR(string);
    1138        9798 :     src = VARDATA_ANY(string);
    1139             : 
    1140        9798 :     if (src_encoding == dest_encoding)
    1141             :     {
    1142             :         /* just check that the source string is valid */
    1143             :         int         oklen;
    1144             : 
    1145        4092 :         oklen = pg_encoding_verifymbstr(src_encoding, src, srclen);
    1146             : 
    1147        4092 :         if (oklen == srclen)
    1148             :         {
    1149        1032 :             convertedbytes = oklen;
    1150        1032 :             retval = string;
    1151             :         }
    1152        3060 :         else if (!noError)
    1153             :         {
    1154        1530 :             report_invalid_encoding(src_encoding, src + oklen, srclen - oklen);
    1155             :         }
    1156             :         else
    1157             :         {
    1158             :             /*
    1159             :              * build bytea data type structure.
    1160             :              */
    1161             :             Assert(oklen < srclen);
    1162        1530 :             convertedbytes = oklen;
    1163        1530 :             retval = (bytea *) palloc(oklen + VARHDRSZ);
    1164        1530 :             SET_VARSIZE(retval, oklen + VARHDRSZ);
    1165        1530 :             memcpy(VARDATA(retval), src, oklen);
    1166             :         }
    1167             :     }
    1168             :     else
    1169             :     {
    1170        5706 :         proc = FindDefaultConversionProc(src_encoding, dest_encoding);
    1171        5706 :         if (!OidIsValid(proc))
    1172           0 :             ereport(ERROR,
    1173             :                     (errcode(ERRCODE_UNDEFINED_FUNCTION),
    1174             :                      errmsg("default conversion function for encoding \"%s\" to \"%s\" does not exist",
    1175             :                             pg_encoding_to_char(src_encoding),
    1176             :                             pg_encoding_to_char(dest_encoding))));
    1177             : 
    1178        5706 :         if (srclen >= (MaxAllocSize / (Size) MAX_CONVERSION_GROWTH))
    1179           0 :             ereport(ERROR,
    1180             :                     (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
    1181             :                      errmsg("out of memory"),
    1182             :                      errdetail("String of %d bytes is too long for encoding conversion.",
    1183             :                                (int) srclen)));
    1184             : 
    1185        5706 :         dstsize = (Size) srclen * MAX_CONVERSION_GROWTH + 1;
    1186        5706 :         dst = MemoryContextAlloc(CurrentMemoryContext, dstsize);
    1187             : 
    1188             :         /* perform conversion */
    1189        5706 :         convertedbytes = pg_do_encoding_conversion_buf(proc,
    1190             :                                                        src_encoding,
    1191             :                                                        dest_encoding,
    1192             :                                                        (unsigned char *) src, srclen,
    1193             :                                                        (unsigned char *) dst, dstsize,
    1194             :                                                        noError);
    1195        3366 :         dstlen = strlen(dst);
    1196             : 
    1197             :         /*
    1198             :          * build bytea data type structure.
    1199             :          */
    1200        3366 :         retval = (bytea *) palloc(dstlen + VARHDRSZ);
    1201        3366 :         SET_VARSIZE(retval, dstlen + VARHDRSZ);
    1202        3366 :         memcpy(VARDATA(retval), dst, dstlen);
    1203             : 
    1204        3366 :         pfree(dst);
    1205             :     }
    1206             : 
    1207        5928 :     values[0] = Int32GetDatum(convertedbytes);
    1208        5928 :     values[1] = PointerGetDatum(retval);
    1209        5928 :     tuple = heap_form_tuple(tupdesc, values, nulls);
    1210             : 
    1211        5928 :     PG_RETURN_DATUM(HeapTupleGetDatum(tuple));
    1212             : }
    1213             : 
    1214             : /* Provide SQL access to IsBinaryCoercible() */
    1215          14 : PG_FUNCTION_INFO_V1(binary_coercible);
    1216             : Datum
    1217       37356 : binary_coercible(PG_FUNCTION_ARGS)
    1218             : {
    1219       37356 :     Oid         srctype = PG_GETARG_OID(0);
    1220       37356 :     Oid         targettype = PG_GETARG_OID(1);
    1221             : 
    1222       37356 :     PG_RETURN_BOOL(IsBinaryCoercible(srctype, targettype));
    1223             : }

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