LCOV - code coverage report
Current view: top level - src/test/regress - regress.c (source / functions) Hit Total Coverage
Test: PostgreSQL 16devel Lines: 447 494 90.5 %
Date: 2023-01-27 18:10:33 Functions: 49 51 96.1 %
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) 1996-2023, 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/lsyscache.h"
      46             : #include "utils/memutils.h"
      47             : #include "utils/rel.h"
      48             : #include "utils/typcache.h"
      49             : 
      50             : #define EXPECT_TRUE(expr)   \
      51             :     do { \
      52             :         if (!(expr)) \
      53             :             elog(ERROR, \
      54             :                  "%s was unexpectedly false in file \"%s\" line %u", \
      55             :                  #expr, __FILE__, __LINE__); \
      56             :     } while (0)
      57             : 
      58             : #define EXPECT_EQ_U32(result_expr, expected_expr)   \
      59             :     do { \
      60             :         uint32      actual_result = (result_expr); \
      61             :         uint32      expected_result = (expected_expr); \
      62             :         if (actual_result != expected_result) \
      63             :             elog(ERROR, \
      64             :                  "%s yielded %u, expected %s in file \"%s\" line %u", \
      65             :                  #result_expr, actual_result, #expected_expr, __FILE__, __LINE__); \
      66             :     } while (0)
      67             : 
      68             : #define EXPECT_EQ_U64(result_expr, expected_expr)   \
      69             :     do { \
      70             :         uint64      actual_result = (result_expr); \
      71             :         uint64      expected_result = (expected_expr); \
      72             :         if (actual_result != expected_result) \
      73             :             elog(ERROR, \
      74             :                  "%s yielded " UINT64_FORMAT ", expected %s in file \"%s\" line %u", \
      75             :                  #result_expr, actual_result, #expected_expr, __FILE__, __LINE__); \
      76             :     } while (0)
      77             : 
      78             : #define LDELIM          '('
      79             : #define RDELIM          ')'
      80             : #define DELIM           ','
      81             : 
      82             : static void regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2);
      83             : 
      84         110 : PG_MODULE_MAGIC;
      85             : 
      86             : 
      87             : /* return the point where two paths intersect, or NULL if no intersection. */
      88          14 : PG_FUNCTION_INFO_V1(interpt_pp);
      89             : 
      90             : Datum
      91        5376 : interpt_pp(PG_FUNCTION_ARGS)
      92             : {
      93        5376 :     PATH       *p1 = PG_GETARG_PATH_P(0);
      94        5376 :     PATH       *p2 = PG_GETARG_PATH_P(1);
      95             :     int         i,
      96             :                 j;
      97             :     LSEG        seg1,
      98             :                 seg2;
      99             :     bool        found;          /* We've found the intersection */
     100             : 
     101        5376 :     found = false;              /* Haven't found it yet */
     102             : 
     103       17646 :     for (i = 0; i < p1->npts - 1 && !found; i++)
     104             :     {
     105       12270 :         regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
     106       37638 :         for (j = 0; j < p2->npts - 1 && !found; j++)
     107             :         {
     108       25368 :             regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
     109       25368 :             if (DatumGetBool(DirectFunctionCall2(lseg_intersect,
     110             :                                                  LsegPGetDatum(&seg1),
     111             :                                                  LsegPGetDatum(&seg2))))
     112        5364 :                 found = true;
     113             :         }
     114             :     }
     115             : 
     116        5376 :     if (!found)
     117          12 :         PG_RETURN_NULL();
     118             : 
     119             :     /*
     120             :      * Note: DirectFunctionCall2 will kick out an error if lseg_interpt()
     121             :      * returns NULL, but that should be impossible since we know the two
     122             :      * segments intersect.
     123             :      */
     124        5364 :     PG_RETURN_DATUM(DirectFunctionCall2(lseg_interpt,
     125             :                                         LsegPGetDatum(&seg1),
     126             :                                         LsegPGetDatum(&seg2)));
     127             : }
     128             : 
     129             : 
     130             : /* like lseg_construct, but assume space already allocated */
     131             : static void
     132       37638 : regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2)
     133             : {
     134       37638 :     lseg->p[0].x = pt1->x;
     135       37638 :     lseg->p[0].y = pt1->y;
     136       37638 :     lseg->p[1].x = pt2->x;
     137       37638 :     lseg->p[1].y = pt2->y;
     138       37638 : }
     139             : 
     140          14 : PG_FUNCTION_INFO_V1(overpaid);
     141             : 
     142             : Datum
     143          36 : overpaid(PG_FUNCTION_ARGS)
     144             : {
     145          36 :     HeapTupleHeader tuple = PG_GETARG_HEAPTUPLEHEADER(0);
     146             :     bool        isnull;
     147             :     int32       salary;
     148             : 
     149          36 :     salary = DatumGetInt32(GetAttributeByName(tuple, "salary", &isnull));
     150          36 :     if (isnull)
     151           0 :         PG_RETURN_NULL();
     152          36 :     PG_RETURN_BOOL(salary > 699);
     153             : }
     154             : 
     155             : /* New type "widget"
     156             :  * This used to be "circle", but I added circle to builtins,
     157             :  *  so needed to make sure the names do not collide. - tgl 97/04/21
     158             :  */
     159             : 
     160             : typedef struct
     161             : {
     162             :     Point       center;
     163             :     double      radius;
     164             : } WIDGET;
     165             : 
     166          14 : PG_FUNCTION_INFO_V1(widget_in);
     167          14 : PG_FUNCTION_INFO_V1(widget_out);
     168             : 
     169             : #define NARGS   3
     170             : 
     171             : Datum
     172          60 : widget_in(PG_FUNCTION_ARGS)
     173             : {
     174          60 :     char       *str = PG_GETARG_CSTRING(0);
     175             :     char       *p,
     176             :                *coord[NARGS];
     177             :     int         i;
     178             :     WIDGET     *result;
     179             : 
     180         366 :     for (i = 0, p = str; *p && i < NARGS && *p != RDELIM; p++)
     181             :     {
     182         306 :         if (*p == DELIM || (*p == LDELIM && i == 0))
     183         162 :             coord[i++] = p + 1;
     184             :     }
     185             : 
     186             :     /*
     187             :      * Note: DON'T convert this error to "soft" style (errsave/ereturn).  We
     188             :      * want this data type to stay permanently in the hard-error world so that
     189             :      * it can be used for testing that such cases still work reasonably.
     190             :      */
     191          60 :     if (i < NARGS)
     192          18 :         ereport(ERROR,
     193             :                 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
     194             :                  errmsg("invalid input syntax for type %s: \"%s\"",
     195             :                         "widget", str)));
     196             : 
     197          42 :     result = (WIDGET *) palloc(sizeof(WIDGET));
     198          42 :     result->center.x = atof(coord[0]);
     199          42 :     result->center.y = atof(coord[1]);
     200          42 :     result->radius = atof(coord[2]);
     201             : 
     202          42 :     PG_RETURN_POINTER(result);
     203             : }
     204             : 
     205             : Datum
     206          12 : widget_out(PG_FUNCTION_ARGS)
     207             : {
     208          12 :     WIDGET     *widget = (WIDGET *) PG_GETARG_POINTER(0);
     209          12 :     char       *str = psprintf("(%g,%g,%g)",
     210             :                                widget->center.x, widget->center.y, widget->radius);
     211             : 
     212          12 :     PG_RETURN_CSTRING(str);
     213             : }
     214             : 
     215          14 : PG_FUNCTION_INFO_V1(pt_in_widget);
     216             : 
     217             : Datum
     218          12 : pt_in_widget(PG_FUNCTION_ARGS)
     219             : {
     220          12 :     Point      *point = PG_GETARG_POINT_P(0);
     221          12 :     WIDGET     *widget = (WIDGET *) PG_GETARG_POINTER(1);
     222             :     float8      distance;
     223             : 
     224          12 :     distance = DatumGetFloat8(DirectFunctionCall2(point_distance,
     225             :                                                   PointPGetDatum(point),
     226             :                                                   PointPGetDatum(&widget->center)));
     227             : 
     228          12 :     PG_RETURN_BOOL(distance < widget->radius);
     229             : }
     230             : 
     231          14 : PG_FUNCTION_INFO_V1(reverse_name);
     232             : 
     233             : Datum
     234          48 : reverse_name(PG_FUNCTION_ARGS)
     235             : {
     236          48 :     char       *string = PG_GETARG_CSTRING(0);
     237             :     int         i;
     238             :     int         len;
     239             :     char       *new_string;
     240             : 
     241          48 :     new_string = palloc0(NAMEDATALEN);
     242         336 :     for (i = 0; i < NAMEDATALEN && string[i]; ++i)
     243             :         ;
     244          48 :     if (i == NAMEDATALEN || !string[i])
     245          48 :         --i;
     246          48 :     len = i;
     247         336 :     for (; i >= 0; --i)
     248         288 :         new_string[len - i] = string[i];
     249          48 :     PG_RETURN_CSTRING(new_string);
     250             : }
     251             : 
     252          14 : PG_FUNCTION_INFO_V1(trigger_return_old);
     253             : 
     254             : Datum
     255          90 : trigger_return_old(PG_FUNCTION_ARGS)
     256             : {
     257          90 :     TriggerData *trigdata = (TriggerData *) fcinfo->context;
     258             :     HeapTuple   tuple;
     259             : 
     260          90 :     if (!CALLED_AS_TRIGGER(fcinfo))
     261           0 :         elog(ERROR, "trigger_return_old: not fired by trigger manager");
     262             : 
     263          90 :     tuple = trigdata->tg_trigtuple;
     264             : 
     265          90 :     return PointerGetDatum(tuple);
     266             : }
     267             : 
     268             : #define TTDUMMY_INFINITY    999999
     269             : 
     270             : static SPIPlanPtr splan = NULL;
     271             : static bool ttoff = false;
     272             : 
     273          14 : PG_FUNCTION_INFO_V1(ttdummy);
     274             : 
     275             : Datum
     276          60 : ttdummy(PG_FUNCTION_ARGS)
     277             : {
     278          60 :     TriggerData *trigdata = (TriggerData *) fcinfo->context;
     279             :     Trigger    *trigger;        /* to get trigger name */
     280             :     char      **args;           /* arguments */
     281             :     int         attnum[2];      /* fnumbers of start/stop columns */
     282             :     Datum       oldon,
     283             :                 oldoff;
     284             :     Datum       newon,
     285             :                 newoff;
     286             :     Datum      *cvals;          /* column values */
     287             :     char       *cnulls;         /* column nulls */
     288             :     char       *relname;        /* triggered relation name */
     289             :     Relation    rel;            /* triggered relation */
     290             :     HeapTuple   trigtuple;
     291          60 :     HeapTuple   newtuple = NULL;
     292             :     HeapTuple   rettuple;
     293             :     TupleDesc   tupdesc;        /* tuple description */
     294             :     int         natts;          /* # of attributes */
     295             :     bool        isnull;         /* to know is some column NULL or not */
     296             :     int         ret;
     297             :     int         i;
     298             : 
     299          60 :     if (!CALLED_AS_TRIGGER(fcinfo))
     300           0 :         elog(ERROR, "ttdummy: not fired by trigger manager");
     301          60 :     if (!TRIGGER_FIRED_FOR_ROW(trigdata->tg_event))
     302           0 :         elog(ERROR, "ttdummy: must be fired for row");
     303          60 :     if (!TRIGGER_FIRED_BEFORE(trigdata->tg_event))
     304           0 :         elog(ERROR, "ttdummy: must be fired before event");
     305          60 :     if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
     306           0 :         elog(ERROR, "ttdummy: cannot process INSERT event");
     307          60 :     if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
     308          48 :         newtuple = trigdata->tg_newtuple;
     309             : 
     310          60 :     trigtuple = trigdata->tg_trigtuple;
     311             : 
     312          60 :     rel = trigdata->tg_relation;
     313          60 :     relname = SPI_getrelname(rel);
     314             : 
     315             :     /* check if TT is OFF for this relation */
     316          60 :     if (ttoff)                  /* OFF - nothing to do */
     317             :     {
     318          30 :         pfree(relname);
     319          30 :         return PointerGetDatum((newtuple != NULL) ? newtuple : trigtuple);
     320             :     }
     321             : 
     322          30 :     trigger = trigdata->tg_trigger;
     323             : 
     324          30 :     if (trigger->tgnargs != 2)
     325           0 :         elog(ERROR, "ttdummy (%s): invalid (!= 2) number of arguments %d",
     326             :              relname, trigger->tgnargs);
     327             : 
     328          30 :     args = trigger->tgargs;
     329          30 :     tupdesc = rel->rd_att;
     330          30 :     natts = tupdesc->natts;
     331             : 
     332          90 :     for (i = 0; i < 2; i++)
     333             :     {
     334          60 :         attnum[i] = SPI_fnumber(tupdesc, args[i]);
     335          60 :         if (attnum[i] <= 0)
     336           0 :             elog(ERROR, "ttdummy (%s): there is no attribute %s",
     337             :                  relname, args[i]);
     338          60 :         if (SPI_gettypeid(tupdesc, attnum[i]) != INT4OID)
     339           0 :             elog(ERROR, "ttdummy (%s): attribute %s must be of integer type",
     340             :                  relname, args[i]);
     341             :     }
     342             : 
     343          30 :     oldon = SPI_getbinval(trigtuple, tupdesc, attnum[0], &isnull);
     344          30 :     if (isnull)
     345           0 :         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
     346             : 
     347          30 :     oldoff = SPI_getbinval(trigtuple, tupdesc, attnum[1], &isnull);
     348          30 :     if (isnull)
     349           0 :         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
     350             : 
     351          30 :     if (newtuple != NULL)       /* UPDATE */
     352             :     {
     353          24 :         newon = SPI_getbinval(newtuple, tupdesc, attnum[0], &isnull);
     354          24 :         if (isnull)
     355           0 :             elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
     356          24 :         newoff = SPI_getbinval(newtuple, tupdesc, attnum[1], &isnull);
     357          24 :         if (isnull)
     358           0 :             elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
     359             : 
     360          24 :         if (oldon != newon || oldoff != newoff)
     361           6 :             ereport(ERROR,
     362             :                     (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
     363             :                      errmsg("ttdummy (%s): you cannot change %s and/or %s columns (use set_ttdummy)",
     364             :                             relname, args[0], args[1])));
     365             : 
     366          18 :         if (newoff != TTDUMMY_INFINITY)
     367             :         {
     368           6 :             pfree(relname);     /* allocated in upper executor context */
     369           6 :             return PointerGetDatum(NULL);
     370             :         }
     371             :     }
     372           6 :     else if (oldoff != TTDUMMY_INFINITY)    /* DELETE */
     373             :     {
     374           0 :         pfree(relname);
     375           0 :         return PointerGetDatum(NULL);
     376             :     }
     377             : 
     378          18 :     newoff = DirectFunctionCall1(nextval, CStringGetTextDatum("ttdummy_seq"));
     379             :     /* nextval now returns int64; coerce down to int32 */
     380          18 :     newoff = Int32GetDatum((int32) DatumGetInt64(newoff));
     381             : 
     382             :     /* Connect to SPI manager */
     383          18 :     if ((ret = SPI_connect()) < 0)
     384           0 :         elog(ERROR, "ttdummy (%s): SPI_connect returned %d", relname, ret);
     385             : 
     386             :     /* Fetch tuple values and nulls */
     387          18 :     cvals = (Datum *) palloc(natts * sizeof(Datum));
     388          18 :     cnulls = (char *) palloc(natts * sizeof(char));
     389          90 :     for (i = 0; i < natts; i++)
     390             :     {
     391          72 :         cvals[i] = SPI_getbinval((newtuple != NULL) ? newtuple : trigtuple,
     392             :                                  tupdesc, i + 1, &isnull);
     393          72 :         cnulls[i] = (isnull) ? 'n' : ' ';
     394             :     }
     395             : 
     396             :     /* change date column(s) */
     397          18 :     if (newtuple)               /* UPDATE */
     398             :     {
     399          12 :         cvals[attnum[0] - 1] = newoff;  /* start_date eq current date */
     400          12 :         cnulls[attnum[0] - 1] = ' ';
     401          12 :         cvals[attnum[1] - 1] = TTDUMMY_INFINITY;    /* stop_date eq INFINITY */
     402          12 :         cnulls[attnum[1] - 1] = ' ';
     403             :     }
     404             :     else
     405             :         /* DELETE */
     406             :     {
     407           6 :         cvals[attnum[1] - 1] = newoff;  /* stop_date eq current date */
     408           6 :         cnulls[attnum[1] - 1] = ' ';
     409             :     }
     410             : 
     411             :     /* if there is no plan ... */
     412          18 :     if (splan == NULL)
     413             :     {
     414             :         SPIPlanPtr  pplan;
     415             :         Oid        *ctypes;
     416             :         char       *query;
     417             : 
     418             :         /* allocate space in preparation */
     419           6 :         ctypes = (Oid *) palloc(natts * sizeof(Oid));
     420           6 :         query = (char *) palloc(100 + 16 * natts);
     421             : 
     422             :         /*
     423             :          * Construct query: INSERT INTO _relation_ VALUES ($1, ...)
     424             :          */
     425           6 :         sprintf(query, "INSERT INTO %s VALUES (", relname);
     426          30 :         for (i = 1; i <= natts; i++)
     427             :         {
     428          24 :             sprintf(query + strlen(query), "$%d%s",
     429             :                     i, (i < natts) ? ", " : ")");
     430          24 :             ctypes[i - 1] = SPI_gettypeid(tupdesc, i);
     431             :         }
     432             : 
     433             :         /* Prepare plan for query */
     434           6 :         pplan = SPI_prepare(query, natts, ctypes);
     435           6 :         if (pplan == NULL)
     436           0 :             elog(ERROR, "ttdummy (%s): SPI_prepare returned %s", relname, SPI_result_code_string(SPI_result));
     437             : 
     438           6 :         if (SPI_keepplan(pplan))
     439           0 :             elog(ERROR, "ttdummy (%s): SPI_keepplan failed", relname);
     440             : 
     441           6 :         splan = pplan;
     442             :     }
     443             : 
     444          18 :     ret = SPI_execp(splan, cvals, cnulls, 0);
     445             : 
     446          18 :     if (ret < 0)
     447           0 :         elog(ERROR, "ttdummy (%s): SPI_execp returned %d", relname, ret);
     448             : 
     449             :     /* Tuple to return to upper Executor ... */
     450          18 :     if (newtuple)               /* UPDATE */
     451          12 :         rettuple = SPI_modifytuple(rel, trigtuple, 1, &(attnum[1]), &newoff, NULL);
     452             :     else                        /* DELETE */
     453           6 :         rettuple = trigtuple;
     454             : 
     455          18 :     SPI_finish();               /* don't forget say Bye to SPI mgr */
     456             : 
     457          18 :     pfree(relname);
     458             : 
     459          18 :     return PointerGetDatum(rettuple);
     460             : }
     461             : 
     462          14 : PG_FUNCTION_INFO_V1(set_ttdummy);
     463             : 
     464             : Datum
     465          18 : set_ttdummy(PG_FUNCTION_ARGS)
     466             : {
     467          18 :     int32       on = PG_GETARG_INT32(0);
     468             : 
     469          18 :     if (ttoff)                  /* OFF currently */
     470             :     {
     471           6 :         if (on == 0)
     472           0 :             PG_RETURN_INT32(0);
     473             : 
     474             :         /* turn ON */
     475           6 :         ttoff = false;
     476           6 :         PG_RETURN_INT32(0);
     477             :     }
     478             : 
     479             :     /* ON currently */
     480          12 :     if (on != 0)
     481           0 :         PG_RETURN_INT32(1);
     482             : 
     483             :     /* turn OFF */
     484          12 :     ttoff = true;
     485             : 
     486          12 :     PG_RETURN_INT32(1);
     487             : }
     488             : 
     489             : 
     490             : /*
     491             :  * Type int44 has no real-world use, but the regression tests use it
     492             :  * (under the alias "city_budget").  It's a four-element vector of int4's.
     493             :  */
     494             : 
     495             : /*
     496             :  *      int44in         - converts "num, num, ..." to internal form
     497             :  *
     498             :  *      Note: Fills any missing positions with zeroes.
     499             :  */
     500          14 : PG_FUNCTION_INFO_V1(int44in);
     501             : 
     502             : Datum
     503          12 : int44in(PG_FUNCTION_ARGS)
     504             : {
     505          12 :     char       *input_string = PG_GETARG_CSTRING(0);
     506          12 :     int32      *result = (int32 *) palloc(4 * sizeof(int32));
     507             :     int         i;
     508             : 
     509          12 :     i = sscanf(input_string,
     510             :                "%d, %d, %d, %d",
     511             :                &result[0],
     512             :                &result[1],
     513             :                &result[2],
     514             :                &result[3]);
     515          18 :     while (i < 4)
     516           6 :         result[i++] = 0;
     517             : 
     518          12 :     PG_RETURN_POINTER(result);
     519             : }
     520             : 
     521             : /*
     522             :  *      int44out        - converts internal form to "num, num, ..."
     523             :  */
     524          22 : PG_FUNCTION_INFO_V1(int44out);
     525             : 
     526             : Datum
     527          28 : int44out(PG_FUNCTION_ARGS)
     528             : {
     529          28 :     int32      *an_array = (int32 *) PG_GETARG_POINTER(0);
     530          28 :     char       *result = (char *) palloc(16 * 4);
     531             : 
     532          28 :     snprintf(result, 16 * 4, "%d,%d,%d,%d",
     533             :              an_array[0],
     534          28 :              an_array[1],
     535          28 :              an_array[2],
     536          28 :              an_array[3]);
     537             : 
     538          28 :     PG_RETURN_CSTRING(result);
     539             : }
     540             : 
     541          14 : PG_FUNCTION_INFO_V1(test_canonicalize_path);
     542             : Datum
     543         132 : test_canonicalize_path(PG_FUNCTION_ARGS)
     544             : {
     545         132 :     char       *path = text_to_cstring(PG_GETARG_TEXT_PP(0));
     546             : 
     547         132 :     canonicalize_path(path);
     548         132 :     PG_RETURN_TEXT_P(cstring_to_text(path));
     549             : }
     550             : 
     551          14 : PG_FUNCTION_INFO_V1(make_tuple_indirect);
     552             : Datum
     553         126 : make_tuple_indirect(PG_FUNCTION_ARGS)
     554             : {
     555         126 :     HeapTupleHeader rec = PG_GETARG_HEAPTUPLEHEADER(0);
     556             :     HeapTupleData tuple;
     557             :     int         ncolumns;
     558             :     Datum      *values;
     559             :     bool       *nulls;
     560             : 
     561             :     Oid         tupType;
     562             :     int32       tupTypmod;
     563             :     TupleDesc   tupdesc;
     564             : 
     565             :     HeapTuple   newtup;
     566             : 
     567             :     int         i;
     568             : 
     569             :     MemoryContext old_context;
     570             : 
     571             :     /* Extract type info from the tuple itself */
     572         126 :     tupType = HeapTupleHeaderGetTypeId(rec);
     573         126 :     tupTypmod = HeapTupleHeaderGetTypMod(rec);
     574         126 :     tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
     575         126 :     ncolumns = tupdesc->natts;
     576             : 
     577             :     /* Build a temporary HeapTuple control structure */
     578         126 :     tuple.t_len = HeapTupleHeaderGetDatumLength(rec);
     579         126 :     ItemPointerSetInvalid(&(tuple.t_self));
     580         126 :     tuple.t_tableOid = InvalidOid;
     581         126 :     tuple.t_data = rec;
     582             : 
     583         126 :     values = (Datum *) palloc(ncolumns * sizeof(Datum));
     584         126 :     nulls = (bool *) palloc(ncolumns * sizeof(bool));
     585             : 
     586         126 :     heap_deform_tuple(&tuple, tupdesc, values, nulls);
     587             : 
     588         126 :     old_context = MemoryContextSwitchTo(TopTransactionContext);
     589             : 
     590         630 :     for (i = 0; i < ncolumns; i++)
     591             :     {
     592             :         struct varlena *attr;
     593             :         struct varlena *new_attr;
     594             :         struct varatt_indirect redirect_pointer;
     595             : 
     596             :         /* only work on existing, not-null varlenas */
     597         504 :         if (TupleDescAttr(tupdesc, i)->attisdropped ||
     598         504 :             nulls[i] ||
     599         438 :             TupleDescAttr(tupdesc, i)->attlen != -1)
     600         192 :             continue;
     601             : 
     602         312 :         attr = (struct varlena *) DatumGetPointer(values[i]);
     603             : 
     604             :         /* don't recursively indirect */
     605         312 :         if (VARATT_IS_EXTERNAL_INDIRECT(attr))
     606           0 :             continue;
     607             : 
     608             :         /* copy datum, so it still lives later */
     609         312 :         if (VARATT_IS_EXTERNAL_ONDISK(attr))
     610           0 :             attr = detoast_external_attr(attr);
     611             :         else
     612             :         {
     613         312 :             struct varlena *oldattr = attr;
     614             : 
     615         312 :             attr = palloc0(VARSIZE_ANY(oldattr));
     616         312 :             memcpy(attr, oldattr, VARSIZE_ANY(oldattr));
     617             :         }
     618             : 
     619             :         /* build indirection Datum */
     620         312 :         new_attr = (struct varlena *) palloc0(INDIRECT_POINTER_SIZE);
     621         312 :         redirect_pointer.pointer = attr;
     622         312 :         SET_VARTAG_EXTERNAL(new_attr, VARTAG_INDIRECT);
     623         312 :         memcpy(VARDATA_EXTERNAL(new_attr), &redirect_pointer,
     624             :                sizeof(redirect_pointer));
     625             : 
     626         312 :         values[i] = PointerGetDatum(new_attr);
     627             :     }
     628             : 
     629         126 :     newtup = heap_form_tuple(tupdesc, values, nulls);
     630         126 :     pfree(values);
     631         126 :     pfree(nulls);
     632         126 :     ReleaseTupleDesc(tupdesc);
     633             : 
     634         126 :     MemoryContextSwitchTo(old_context);
     635             : 
     636             :     /*
     637             :      * We intentionally don't use PG_RETURN_HEAPTUPLEHEADER here, because that
     638             :      * would cause the indirect toast pointers to be flattened out of the
     639             :      * tuple immediately, rendering subsequent testing irrelevant.  So just
     640             :      * return the HeapTupleHeader pointer as-is.  This violates the general
     641             :      * rule that composite Datums shouldn't contain toast pointers, but so
     642             :      * long as the regression test scripts don't insert the result of this
     643             :      * function into a container type (record, array, etc) it should be OK.
     644             :      */
     645         126 :     PG_RETURN_POINTER(newtup->t_data);
     646             : }
     647             : 
     648           4 : PG_FUNCTION_INFO_V1(regress_setenv);
     649             : 
     650             : Datum
     651           2 : regress_setenv(PG_FUNCTION_ARGS)
     652             : {
     653           2 :     char       *envvar = text_to_cstring(PG_GETARG_TEXT_PP(0));
     654           2 :     char       *envval = text_to_cstring(PG_GETARG_TEXT_PP(1));
     655             : 
     656           2 :     if (!superuser())
     657           0 :         elog(ERROR, "must be superuser to change environment variables");
     658             : 
     659           2 :     if (setenv(envvar, envval, 1) != 0)
     660           0 :         elog(ERROR, "could not set environment variable: %m");
     661             : 
     662           2 :     PG_RETURN_VOID();
     663             : }
     664             : 
     665             : /* Sleep until no process has a given PID. */
     666           6 : PG_FUNCTION_INFO_V1(wait_pid);
     667             : 
     668             : Datum
     669           2 : wait_pid(PG_FUNCTION_ARGS)
     670             : {
     671           2 :     int         pid = PG_GETARG_INT32(0);
     672             : 
     673           2 :     if (!superuser())
     674           0 :         elog(ERROR, "must be superuser to check PID liveness");
     675             : 
     676           4 :     while (kill(pid, 0) == 0)
     677             :     {
     678           2 :         CHECK_FOR_INTERRUPTS();
     679           2 :         pg_usleep(50000);
     680             :     }
     681             : 
     682           2 :     if (errno != ESRCH)
     683           0 :         elog(ERROR, "could not check PID %d liveness: %m", pid);
     684             : 
     685           2 :     PG_RETURN_VOID();
     686             : }
     687             : 
     688             : static void
     689           6 : test_atomic_flag(void)
     690             : {
     691             :     pg_atomic_flag flag;
     692             : 
     693           6 :     pg_atomic_init_flag(&flag);
     694           6 :     EXPECT_TRUE(pg_atomic_unlocked_test_flag(&flag));
     695           6 :     EXPECT_TRUE(pg_atomic_test_set_flag(&flag));
     696           6 :     EXPECT_TRUE(!pg_atomic_unlocked_test_flag(&flag));
     697           6 :     EXPECT_TRUE(!pg_atomic_test_set_flag(&flag));
     698           6 :     pg_atomic_clear_flag(&flag);
     699           6 :     EXPECT_TRUE(pg_atomic_unlocked_test_flag(&flag));
     700           6 :     EXPECT_TRUE(pg_atomic_test_set_flag(&flag));
     701           6 :     pg_atomic_clear_flag(&flag);
     702           6 : }
     703             : 
     704             : static void
     705           6 : test_atomic_uint32(void)
     706             : {
     707             :     pg_atomic_uint32 var;
     708             :     uint32      expected;
     709             :     int         i;
     710             : 
     711           6 :     pg_atomic_init_u32(&var, 0);
     712           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), 0);
     713           6 :     pg_atomic_write_u32(&var, 3);
     714           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), 3);
     715           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, pg_atomic_read_u32(&var) - 2),
     716             :                   3);
     717           6 :     EXPECT_EQ_U32(pg_atomic_fetch_sub_u32(&var, 1), 4);
     718           6 :     EXPECT_EQ_U32(pg_atomic_sub_fetch_u32(&var, 3), 0);
     719           6 :     EXPECT_EQ_U32(pg_atomic_add_fetch_u32(&var, 10), 10);
     720           6 :     EXPECT_EQ_U32(pg_atomic_exchange_u32(&var, 5), 10);
     721           6 :     EXPECT_EQ_U32(pg_atomic_exchange_u32(&var, 0), 5);
     722             : 
     723             :     /* test around numerical limits */
     724           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, INT_MAX), 0);
     725           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, INT_MAX), INT_MAX);
     726           6 :     pg_atomic_fetch_add_u32(&var, 2);   /* wrap to 0 */
     727           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, PG_INT16_MAX), 0);
     728           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, PG_INT16_MAX + 1),
     729             :                   PG_INT16_MAX);
     730           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, PG_INT16_MIN),
     731             :                   2 * PG_INT16_MAX + 1);
     732           6 :     EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&var, PG_INT16_MIN - 1),
     733             :                   PG_INT16_MAX);
     734           6 :     pg_atomic_fetch_add_u32(&var, 1);   /* top up to UINT_MAX */
     735           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), UINT_MAX);
     736           6 :     EXPECT_EQ_U32(pg_atomic_fetch_sub_u32(&var, INT_MAX), UINT_MAX);
     737           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), (uint32) INT_MAX + 1);
     738           6 :     EXPECT_EQ_U32(pg_atomic_sub_fetch_u32(&var, INT_MAX), 1);
     739           6 :     pg_atomic_sub_fetch_u32(&var, 1);
     740           6 :     expected = PG_INT16_MAX;
     741           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     742           6 :     expected = PG_INT16_MAX + 1;
     743           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     744           6 :     expected = PG_INT16_MIN;
     745           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     746           6 :     expected = PG_INT16_MIN - 1;
     747           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     748             : 
     749             :     /* fail exchange because of old expected */
     750           6 :     expected = 10;
     751           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u32(&var, &expected, 1));
     752             : 
     753             :     /* CAS is allowed to fail due to interrupts, try a couple of times */
     754          12 :     for (i = 0; i < 1000; i++)
     755             :     {
     756          12 :         expected = 0;
     757          12 :         if (!pg_atomic_compare_exchange_u32(&var, &expected, 1))
     758           6 :             break;
     759             :     }
     760           6 :     if (i == 1000)
     761           0 :         elog(ERROR, "atomic_compare_exchange_u32() never succeeded");
     762           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), 1);
     763           6 :     pg_atomic_write_u32(&var, 0);
     764             : 
     765             :     /* try setting flagbits */
     766           6 :     EXPECT_TRUE(!(pg_atomic_fetch_or_u32(&var, 1) & 1));
     767           6 :     EXPECT_TRUE(pg_atomic_fetch_or_u32(&var, 2) & 1);
     768           6 :     EXPECT_EQ_U32(pg_atomic_read_u32(&var), 3);
     769             :     /* try clearing flagbits */
     770           6 :     EXPECT_EQ_U32(pg_atomic_fetch_and_u32(&var, ~2) & 3, 3);
     771           6 :     EXPECT_EQ_U32(pg_atomic_fetch_and_u32(&var, ~1), 1);
     772             :     /* no bits set anymore */
     773           6 :     EXPECT_EQ_U32(pg_atomic_fetch_and_u32(&var, ~0), 0);
     774           6 : }
     775             : 
     776             : static void
     777           6 : test_atomic_uint64(void)
     778             : {
     779             :     pg_atomic_uint64 var;
     780             :     uint64      expected;
     781             :     int         i;
     782             : 
     783           6 :     pg_atomic_init_u64(&var, 0);
     784           6 :     EXPECT_EQ_U64(pg_atomic_read_u64(&var), 0);
     785           6 :     pg_atomic_write_u64(&var, 3);
     786           6 :     EXPECT_EQ_U64(pg_atomic_read_u64(&var), 3);
     787           6 :     EXPECT_EQ_U64(pg_atomic_fetch_add_u64(&var, pg_atomic_read_u64(&var) - 2),
     788             :                   3);
     789           6 :     EXPECT_EQ_U64(pg_atomic_fetch_sub_u64(&var, 1), 4);
     790           6 :     EXPECT_EQ_U64(pg_atomic_sub_fetch_u64(&var, 3), 0);
     791           6 :     EXPECT_EQ_U64(pg_atomic_add_fetch_u64(&var, 10), 10);
     792           6 :     EXPECT_EQ_U64(pg_atomic_exchange_u64(&var, 5), 10);
     793           6 :     EXPECT_EQ_U64(pg_atomic_exchange_u64(&var, 0), 5);
     794             : 
     795             :     /* fail exchange because of old expected */
     796           6 :     expected = 10;
     797           6 :     EXPECT_TRUE(!pg_atomic_compare_exchange_u64(&var, &expected, 1));
     798             : 
     799             :     /* CAS is allowed to fail due to interrupts, try a couple of times */
     800          12 :     for (i = 0; i < 100; i++)
     801             :     {
     802          12 :         expected = 0;
     803          12 :         if (!pg_atomic_compare_exchange_u64(&var, &expected, 1))
     804           6 :             break;
     805             :     }
     806           6 :     if (i == 100)
     807           0 :         elog(ERROR, "atomic_compare_exchange_u64() never succeeded");
     808           6 :     EXPECT_EQ_U64(pg_atomic_read_u64(&var), 1);
     809             : 
     810           6 :     pg_atomic_write_u64(&var, 0);
     811             : 
     812             :     /* try setting flagbits */
     813           6 :     EXPECT_TRUE(!(pg_atomic_fetch_or_u64(&var, 1) & 1));
     814           6 :     EXPECT_TRUE(pg_atomic_fetch_or_u64(&var, 2) & 1);
     815           6 :     EXPECT_EQ_U64(pg_atomic_read_u64(&var), 3);
     816             :     /* try clearing flagbits */
     817           6 :     EXPECT_EQ_U64((pg_atomic_fetch_and_u64(&var, ~2) & 3), 3);
     818           6 :     EXPECT_EQ_U64(pg_atomic_fetch_and_u64(&var, ~1), 1);
     819             :     /* no bits set anymore */
     820           6 :     EXPECT_EQ_U64(pg_atomic_fetch_and_u64(&var, ~0), 0);
     821           6 : }
     822             : 
     823             : /*
     824             :  * Perform, fairly minimal, testing of the spinlock implementation.
     825             :  *
     826             :  * It's likely worth expanding these to actually test concurrency etc, but
     827             :  * having some regularly run tests is better than none.
     828             :  */
     829             : static void
     830           6 : test_spinlock(void)
     831             : {
     832             :     /*
     833             :      * Basic tests for spinlocks, as well as the underlying operations.
     834             :      *
     835             :      * We embed the spinlock in a struct with other members to test that the
     836             :      * spinlock operations don't perform too wide writes.
     837             :      */
     838             :     {
     839             :         struct test_lock_struct
     840             :         {
     841             :             char        data_before[4];
     842             :             slock_t     lock;
     843             :             char        data_after[4];
     844             :         }           struct_w_lock;
     845             : 
     846           6 :         memcpy(struct_w_lock.data_before, "abcd", 4);
     847           6 :         memcpy(struct_w_lock.data_after, "ef12", 4);
     848             : 
     849             :         /* test basic operations via the SpinLock* API */
     850           6 :         SpinLockInit(&struct_w_lock.lock);
     851           6 :         SpinLockAcquire(&struct_w_lock.lock);
     852           6 :         SpinLockRelease(&struct_w_lock.lock);
     853             : 
     854             :         /* test basic operations via underlying S_* API */
     855           6 :         S_INIT_LOCK(&struct_w_lock.lock);
     856           6 :         S_LOCK(&struct_w_lock.lock);
     857           6 :         S_UNLOCK(&struct_w_lock.lock);
     858             : 
     859             :         /* and that "contended" acquisition works */
     860           6 :         s_lock(&struct_w_lock.lock, "testfile", 17, "testfunc");
     861           6 :         S_UNLOCK(&struct_w_lock.lock);
     862             : 
     863             :         /*
     864             :          * Check, using TAS directly, that a single spin cycle doesn't block
     865             :          * when acquiring an already acquired lock.
     866             :          */
     867             : #ifdef TAS
     868           6 :         S_LOCK(&struct_w_lock.lock);
     869             : 
     870           6 :         if (!TAS(&struct_w_lock.lock))
     871           0 :             elog(ERROR, "acquired already held spinlock");
     872             : 
     873             : #ifdef TAS_SPIN
     874           6 :         if (!TAS_SPIN(&struct_w_lock.lock))
     875           0 :             elog(ERROR, "acquired already held spinlock");
     876             : #endif                          /* defined(TAS_SPIN) */
     877             : 
     878           6 :         S_UNLOCK(&struct_w_lock.lock);
     879             : #endif                          /* defined(TAS) */
     880             : 
     881             :         /*
     882             :          * Verify that after all of this the non-lock contents are still
     883             :          * correct.
     884             :          */
     885           6 :         if (memcmp(struct_w_lock.data_before, "abcd", 4) != 0)
     886           0 :             elog(ERROR, "padding before spinlock modified");
     887           6 :         if (memcmp(struct_w_lock.data_after, "ef12", 4) != 0)
     888           0 :             elog(ERROR, "padding after spinlock modified");
     889             :     }
     890             : 
     891             :     /*
     892             :      * Ensure that allocating more than INT32_MAX emulated spinlocks works.
     893             :      * That's interesting because the spinlock emulation uses a 32bit integer
     894             :      * to map spinlocks onto semaphores. There've been bugs...
     895             :      */
     896             : #ifndef HAVE_SPINLOCKS
     897             :     {
     898             :         /*
     899             :          * Initialize enough spinlocks to advance counter close to wraparound.
     900             :          * It's too expensive to perform acquire/release for each, as those
     901             :          * may be syscalls when the spinlock emulation is used (and even just
     902             :          * atomic TAS would be expensive).
     903             :          */
     904             :         for (uint32 i = 0; i < INT32_MAX - 100000; i++)
     905             :         {
     906             :             slock_t     lock;
     907             : 
     908             :             SpinLockInit(&lock);
     909             :         }
     910             : 
     911             :         for (uint32 i = 0; i < 200000; i++)
     912             :         {
     913             :             slock_t     lock;
     914             : 
     915             :             SpinLockInit(&lock);
     916             : 
     917             :             SpinLockAcquire(&lock);
     918             :             SpinLockRelease(&lock);
     919             :             SpinLockAcquire(&lock);
     920             :             SpinLockRelease(&lock);
     921             :         }
     922             :     }
     923             : #endif
     924           6 : }
     925             : 
     926             : /*
     927             :  * Verify that performing atomic ops inside a spinlock isn't a
     928             :  * problem. Realistically that's only going to be a problem when both
     929             :  * --disable-spinlocks and --disable-atomics are used, but it's cheap enough
     930             :  * to just always test.
     931             :  *
     932             :  * The test works by initializing enough atomics that we'd conflict if there
     933             :  * were an overlap between a spinlock and an atomic by holding a spinlock
     934             :  * while manipulating more than NUM_SPINLOCK_SEMAPHORES atomics.
     935             :  *
     936             :  * NUM_TEST_ATOMICS doesn't really need to be more than
     937             :  * NUM_SPINLOCK_SEMAPHORES, but it seems better to test a bit more
     938             :  * extensively.
     939             :  */
     940             : static void
     941           6 : test_atomic_spin_nest(void)
     942             : {
     943             :     slock_t     lock;
     944             : #define NUM_TEST_ATOMICS (NUM_SPINLOCK_SEMAPHORES + NUM_ATOMICS_SEMAPHORES + 27)
     945             :     pg_atomic_uint32 atomics32[NUM_TEST_ATOMICS];
     946             :     pg_atomic_uint64 atomics64[NUM_TEST_ATOMICS];
     947             : 
     948           6 :     SpinLockInit(&lock);
     949             : 
     950        1320 :     for (int i = 0; i < NUM_TEST_ATOMICS; i++)
     951             :     {
     952        1314 :         pg_atomic_init_u32(&atomics32[i], 0);
     953        1314 :         pg_atomic_init_u64(&atomics64[i], 0);
     954             :     }
     955             : 
     956             :     /* just so it's not all zeroes */
     957        1320 :     for (int i = 0; i < NUM_TEST_ATOMICS; i++)
     958             :     {
     959        1314 :         EXPECT_EQ_U32(pg_atomic_fetch_add_u32(&atomics32[i], i), 0);
     960        1314 :         EXPECT_EQ_U64(pg_atomic_fetch_add_u64(&atomics64[i], i), 0);
     961             :     }
     962             : 
     963             :     /* test whether we can do atomic op with lock held */
     964           6 :     SpinLockAcquire(&lock);
     965        1320 :     for (int i = 0; i < NUM_TEST_ATOMICS; i++)
     966             :     {
     967        1314 :         EXPECT_EQ_U32(pg_atomic_fetch_sub_u32(&atomics32[i], i), i);
     968        1314 :         EXPECT_EQ_U32(pg_atomic_read_u32(&atomics32[i]), 0);
     969        1314 :         EXPECT_EQ_U64(pg_atomic_fetch_sub_u64(&atomics64[i], i), i);
     970        1314 :         EXPECT_EQ_U64(pg_atomic_read_u64(&atomics64[i]), 0);
     971             :     }
     972           6 :     SpinLockRelease(&lock);
     973           6 : }
     974             : #undef NUM_TEST_ATOMICS
     975             : 
     976          14 : PG_FUNCTION_INFO_V1(test_atomic_ops);
     977             : Datum
     978           6 : test_atomic_ops(PG_FUNCTION_ARGS)
     979             : {
     980           6 :     test_atomic_flag();
     981             : 
     982           6 :     test_atomic_uint32();
     983             : 
     984           6 :     test_atomic_uint64();
     985             : 
     986             :     /*
     987             :      * Arguably this shouldn't be tested as part of this function, but it's
     988             :      * closely enough related that that seems ok for now.
     989             :      */
     990           6 :     test_spinlock();
     991             : 
     992           6 :     test_atomic_spin_nest();
     993             : 
     994           6 :     PG_RETURN_BOOL(true);
     995             : }
     996             : 
     997           8 : PG_FUNCTION_INFO_V1(test_fdw_handler);
     998             : Datum
     999           0 : test_fdw_handler(PG_FUNCTION_ARGS)
    1000             : {
    1001           0 :     elog(ERROR, "test_fdw_handler is not implemented");
    1002             :     PG_RETURN_NULL();
    1003             : }
    1004             : 
    1005          14 : PG_FUNCTION_INFO_V1(test_support_func);
    1006             : Datum
    1007          60 : test_support_func(PG_FUNCTION_ARGS)
    1008             : {
    1009          60 :     Node       *rawreq = (Node *) PG_GETARG_POINTER(0);
    1010          60 :     Node       *ret = NULL;
    1011             : 
    1012          60 :     if (IsA(rawreq, SupportRequestSelectivity))
    1013             :     {
    1014             :         /*
    1015             :          * Assume that the target is int4eq; that's safe as long as we don't
    1016             :          * attach this to any other boolean-returning function.
    1017             :          */
    1018           6 :         SupportRequestSelectivity *req = (SupportRequestSelectivity *) rawreq;
    1019             :         Selectivity s1;
    1020             : 
    1021           6 :         if (req->is_join)
    1022           0 :             s1 = join_selectivity(req->root, Int4EqualOperator,
    1023             :                                   req->args,
    1024             :                                   req->inputcollid,
    1025             :                                   req->jointype,
    1026           0 :                                   req->sjinfo);
    1027             :         else
    1028           6 :             s1 = restriction_selectivity(req->root, Int4EqualOperator,
    1029             :                                          req->args,
    1030             :                                          req->inputcollid,
    1031             :                                          req->varRelid);
    1032             : 
    1033           6 :         req->selectivity = s1;
    1034           6 :         ret = (Node *) req;
    1035             :     }
    1036             : 
    1037          60 :     if (IsA(rawreq, SupportRequestCost))
    1038             :     {
    1039             :         /* Provide some generic estimate */
    1040          18 :         SupportRequestCost *req = (SupportRequestCost *) rawreq;
    1041             : 
    1042          18 :         req->startup = 0;
    1043          18 :         req->per_tuple = 2 * cpu_operator_cost;
    1044          18 :         ret = (Node *) req;
    1045             :     }
    1046             : 
    1047          60 :     if (IsA(rawreq, SupportRequestRows))
    1048             :     {
    1049             :         /*
    1050             :          * Assume that the target is generate_series_int4; that's safe as long
    1051             :          * as we don't attach this to any other set-returning function.
    1052             :          */
    1053          12 :         SupportRequestRows *req = (SupportRequestRows *) rawreq;
    1054             : 
    1055          12 :         if (req->node && IsA(req->node, FuncExpr))    /* be paranoid */
    1056             :         {
    1057          12 :             List       *args = ((FuncExpr *) req->node)->args;
    1058          12 :             Node       *arg1 = linitial(args);
    1059          12 :             Node       *arg2 = lsecond(args);
    1060             : 
    1061          12 :             if (IsA(arg1, Const) &&
    1062          12 :                 !((Const *) arg1)->constisnull &&
    1063          12 :                 IsA(arg2, Const) &&
    1064          12 :                 !((Const *) arg2)->constisnull)
    1065             :             {
    1066          12 :                 int32       val1 = DatumGetInt32(((Const *) arg1)->constvalue);
    1067          12 :                 int32       val2 = DatumGetInt32(((Const *) arg2)->constvalue);
    1068             : 
    1069          12 :                 req->rows = val2 - val1 + 1;
    1070          12 :                 ret = (Node *) req;
    1071             :             }
    1072             :         }
    1073             :     }
    1074             : 
    1075          60 :     PG_RETURN_POINTER(ret);
    1076             : }
    1077             : 
    1078           8 : PG_FUNCTION_INFO_V1(test_opclass_options_func);
    1079             : Datum
    1080           0 : test_opclass_options_func(PG_FUNCTION_ARGS)
    1081             : {
    1082           0 :     PG_RETURN_NULL();
    1083             : }
    1084             : 
    1085             : /*
    1086             :  * Call an encoding conversion or verification function.
    1087             :  *
    1088             :  * Arguments:
    1089             :  *  string    bytea -- string to convert
    1090             :  *  src_enc   name  -- source encoding
    1091             :  *  dest_enc  name  -- destination encoding
    1092             :  *  noError   bool  -- if set, don't ereport() on invalid or untranslatable
    1093             :  *                     input
    1094             :  *
    1095             :  * Result is a tuple with two attributes:
    1096             :  *  int4    -- number of input bytes successfully converted
    1097             :  *  bytea   -- converted string
    1098             :  */
    1099          14 : PG_FUNCTION_INFO_V1(test_enc_conversion);
    1100             : Datum
    1101        9798 : test_enc_conversion(PG_FUNCTION_ARGS)
    1102             : {
    1103        9798 :     bytea      *string = PG_GETARG_BYTEA_PP(0);
    1104        9798 :     char       *src_encoding_name = NameStr(*PG_GETARG_NAME(1));
    1105        9798 :     int         src_encoding = pg_char_to_encoding(src_encoding_name);
    1106        9798 :     char       *dest_encoding_name = NameStr(*PG_GETARG_NAME(2));
    1107        9798 :     int         dest_encoding = pg_char_to_encoding(dest_encoding_name);
    1108        9798 :     bool        noError = PG_GETARG_BOOL(3);
    1109             :     TupleDesc   tupdesc;
    1110             :     char       *src;
    1111             :     char       *dst;
    1112             :     bytea      *retval;
    1113             :     Size        srclen;
    1114             :     Size        dstsize;
    1115             :     Oid         proc;
    1116             :     int         convertedbytes;
    1117             :     int         dstlen;
    1118             :     Datum       values[2];
    1119        9798 :     bool        nulls[2] = {0};
    1120             :     HeapTuple   tuple;
    1121             : 
    1122        9798 :     if (src_encoding < 0)
    1123           0 :         ereport(ERROR,
    1124             :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
    1125             :                  errmsg("invalid source encoding name \"%s\"",
    1126             :                         src_encoding_name)));
    1127        9798 :     if (dest_encoding < 0)
    1128           0 :         ereport(ERROR,
    1129             :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
    1130             :                  errmsg("invalid destination encoding name \"%s\"",
    1131             :                         dest_encoding_name)));
    1132             : 
    1133             :     /* Build a tuple descriptor for our result type */
    1134        9798 :     if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
    1135           0 :         elog(ERROR, "return type must be a row type");
    1136        9798 :     tupdesc = BlessTupleDesc(tupdesc);
    1137             : 
    1138        9798 :     srclen = VARSIZE_ANY_EXHDR(string);
    1139        9798 :     src = VARDATA_ANY(string);
    1140             : 
    1141        9798 :     if (src_encoding == dest_encoding)
    1142             :     {
    1143             :         /* just check that the source string is valid */
    1144             :         int         oklen;
    1145             : 
    1146        4092 :         oklen = pg_encoding_verifymbstr(src_encoding, src, srclen);
    1147             : 
    1148        4092 :         if (oklen == srclen)
    1149             :         {
    1150        1032 :             convertedbytes = oklen;
    1151        1032 :             retval = string;
    1152             :         }
    1153        3060 :         else if (!noError)
    1154             :         {
    1155        1530 :             report_invalid_encoding(src_encoding, src + oklen, srclen - oklen);
    1156             :         }
    1157             :         else
    1158             :         {
    1159             :             /*
    1160             :              * build bytea data type structure.
    1161             :              */
    1162             :             Assert(oklen < srclen);
    1163        1530 :             convertedbytes = oklen;
    1164        1530 :             retval = (bytea *) palloc(oklen + VARHDRSZ);
    1165        1530 :             SET_VARSIZE(retval, oklen + VARHDRSZ);
    1166        1530 :             memcpy(VARDATA(retval), src, oklen);
    1167             :         }
    1168             :     }
    1169             :     else
    1170             :     {
    1171        5706 :         proc = FindDefaultConversionProc(src_encoding, dest_encoding);
    1172        5706 :         if (!OidIsValid(proc))
    1173           0 :             ereport(ERROR,
    1174             :                     (errcode(ERRCODE_UNDEFINED_FUNCTION),
    1175             :                      errmsg("default conversion function for encoding \"%s\" to \"%s\" does not exist",
    1176             :                             pg_encoding_to_char(src_encoding),
    1177             :                             pg_encoding_to_char(dest_encoding))));
    1178             : 
    1179        5706 :         if (srclen >= (MaxAllocSize / (Size) MAX_CONVERSION_GROWTH))
    1180           0 :             ereport(ERROR,
    1181             :                     (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
    1182             :                      errmsg("out of memory"),
    1183             :                      errdetail("String of %d bytes is too long for encoding conversion.",
    1184             :                                (int) srclen)));
    1185             : 
    1186        5706 :         dstsize = (Size) srclen * MAX_CONVERSION_GROWTH + 1;
    1187        5706 :         dst = MemoryContextAlloc(CurrentMemoryContext, dstsize);
    1188             : 
    1189             :         /* perform conversion */
    1190        5706 :         convertedbytes = pg_do_encoding_conversion_buf(proc,
    1191             :                                                        src_encoding,
    1192             :                                                        dest_encoding,
    1193             :                                                        (unsigned char *) src, srclen,
    1194             :                                                        (unsigned char *) dst, dstsize,
    1195             :                                                        noError);
    1196        3366 :         dstlen = strlen(dst);
    1197             : 
    1198             :         /*
    1199             :          * build bytea data type structure.
    1200             :          */
    1201        3366 :         retval = (bytea *) palloc(dstlen + VARHDRSZ);
    1202        3366 :         SET_VARSIZE(retval, dstlen + VARHDRSZ);
    1203        3366 :         memcpy(VARDATA(retval), dst, dstlen);
    1204             : 
    1205        3366 :         pfree(dst);
    1206             :     }
    1207             : 
    1208        5928 :     values[0] = Int32GetDatum(convertedbytes);
    1209        5928 :     values[1] = PointerGetDatum(retval);
    1210        5928 :     tuple = heap_form_tuple(tupdesc, values, nulls);
    1211             : 
    1212        5928 :     PG_RETURN_DATUM(HeapTupleGetDatum(tuple));
    1213             : }
    1214             : 
    1215             : /* Provide SQL access to IsBinaryCoercible() */
    1216          14 : PG_FUNCTION_INFO_V1(binary_coercible);
    1217             : Datum
    1218       36912 : binary_coercible(PG_FUNCTION_ARGS)
    1219             : {
    1220       36912 :     Oid         srctype = PG_GETARG_OID(0);
    1221       36912 :     Oid         targettype = PG_GETARG_OID(1);
    1222             : 
    1223       36912 :     PG_RETURN_BOOL(IsBinaryCoercible(srctype, targettype));
    1224             : }
    1225             : 
    1226             : /*
    1227             :  * Return the length of the portion of a tuple consisting of the given array
    1228             :  * of data types.  The input data types must be fixed-length data types.
    1229             :  */
    1230          14 : PG_FUNCTION_INFO_V1(get_columns_length);
    1231             : Datum
    1232          36 : get_columns_length(PG_FUNCTION_ARGS)
    1233             : {
    1234          36 :     ArrayType  *ta = PG_GETARG_ARRAYTYPE_P(0);
    1235             :     Oid        *type_oids;
    1236             :     int         ntypes;
    1237          36 :     int         column_offset = 0;
    1238             : 
    1239          36 :     if (ARR_HASNULL(ta) && array_contains_nulls(ta))
    1240           0 :         elog(ERROR, "argument must not contain nulls");
    1241             : 
    1242          36 :     if (ARR_NDIM(ta) > 1)
    1243           0 :         elog(ERROR, "argument must be empty or one-dimensional array");
    1244             : 
    1245          36 :     type_oids = (Oid *) ARR_DATA_PTR(ta);
    1246          36 :     ntypes = ArrayGetNItems(ARR_NDIM(ta), ARR_DIMS(ta));
    1247         168 :     for (int i = 0; i < ntypes; i++)
    1248             :     {
    1249         132 :         Oid         typeoid = type_oids[i];
    1250             :         int16       typlen;
    1251             :         bool        typbyval;
    1252             :         char        typalign;
    1253             : 
    1254         132 :         get_typlenbyvalalign(typeoid, &typlen, &typbyval, &typalign);
    1255             : 
    1256             :         /* the data type must be fixed-length */
    1257         132 :         if (typlen < 0)
    1258           0 :             elog(ERROR, "type %u is not fixed-length data type", typeoid);
    1259             : 
    1260         132 :         column_offset = att_align_nominal(column_offset + typlen, typalign);
    1261             :     }
    1262             : 
    1263          36 :     PG_RETURN_INT32(column_offset);
    1264             : }

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