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e7128e8dbb
Because of gcc -Wmissing-prototypes, all functions in dynamically loadable modules must have a separate prototype declaration. This is meant to detect global functions that are not declared in header files, but in cases where the function is called via dfmgr, this is redundant. Besides filling up space with boilerplate, this is a frequent source of compiler warnings in extension modules. We can fix that by creating the function prototype as part of the PG_FUNCTION_INFO_V1 macro, which such modules have to use anyway. That makes the code of modules cleaner, because there is one less place where the entry points have to be listed, and creates an additional check that functions have the right prototype. Remove now redundant prototypes from contrib and other modules.
125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/*
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* contrib/spi/autoinc.c
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*/
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#include "postgres.h"
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#include "catalog/pg_type.h"
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#include "commands/sequence.h"
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#include "commands/trigger.h"
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#include "executor/spi.h"
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#include "utils/builtins.h"
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#include "utils/rel.h"
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PG_MODULE_MAGIC;
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PG_FUNCTION_INFO_V1(autoinc);
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Datum
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autoinc(PG_FUNCTION_ARGS)
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{
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TriggerData *trigdata = (TriggerData *) fcinfo->context;
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Trigger *trigger; /* to get trigger name */
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int nargs; /* # of arguments */
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int *chattrs; /* attnums of attributes to change */
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int chnattrs = 0; /* # of above */
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Datum *newvals; /* vals of above */
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char **args; /* arguments */
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char *relname; /* triggered relation name */
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Relation rel; /* triggered relation */
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HeapTuple rettuple = NULL;
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TupleDesc tupdesc; /* tuple description */
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bool isnull;
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int i;
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if (!CALLED_AS_TRIGGER(fcinfo))
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/* internal error */
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elog(ERROR, "not fired by trigger manager");
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if (!TRIGGER_FIRED_FOR_ROW(trigdata->tg_event))
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/* internal error */
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elog(ERROR, "must be fired for row");
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if (!TRIGGER_FIRED_BEFORE(trigdata->tg_event))
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/* internal error */
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elog(ERROR, "must be fired before event");
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if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
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rettuple = trigdata->tg_trigtuple;
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else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
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rettuple = trigdata->tg_newtuple;
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else
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/* internal error */
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elog(ERROR, "cannot process DELETE events");
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rel = trigdata->tg_relation;
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relname = SPI_getrelname(rel);
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trigger = trigdata->tg_trigger;
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nargs = trigger->tgnargs;
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if (nargs <= 0 || nargs % 2 != 0)
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/* internal error */
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elog(ERROR, "autoinc (%s): even number gt 0 of arguments was expected", relname);
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args = trigger->tgargs;
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tupdesc = rel->rd_att;
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chattrs = (int *) palloc(nargs / 2 * sizeof(int));
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newvals = (Datum *) palloc(nargs / 2 * sizeof(Datum));
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for (i = 0; i < nargs;)
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{
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int attnum = SPI_fnumber(tupdesc, args[i]);
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int32 val;
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Datum seqname;
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if (attnum < 0)
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ereport(ERROR,
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(errcode(ERRCODE_TRIGGERED_ACTION_EXCEPTION),
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errmsg("\"%s\" has no attribute \"%s\"",
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relname, args[i])));
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if (SPI_gettypeid(tupdesc, attnum) != INT4OID)
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ereport(ERROR,
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(errcode(ERRCODE_TRIGGERED_ACTION_EXCEPTION),
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errmsg("attribute \"%s\" of \"%s\" must be type INT4",
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args[i], relname)));
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val = DatumGetInt32(SPI_getbinval(rettuple, tupdesc, attnum, &isnull));
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if (!isnull && val != 0)
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{
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i += 2;
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continue;
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}
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i++;
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chattrs[chnattrs] = attnum;
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seqname = CStringGetTextDatum(args[i]);
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newvals[chnattrs] = DirectFunctionCall1(nextval, seqname);
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/* nextval now returns int64; coerce down to int32 */
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newvals[chnattrs] = Int32GetDatum((int32) DatumGetInt64(newvals[chnattrs]));
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if (DatumGetInt32(newvals[chnattrs]) == 0)
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{
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newvals[chnattrs] = DirectFunctionCall1(nextval, seqname);
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newvals[chnattrs] = Int32GetDatum((int32) DatumGetInt64(newvals[chnattrs]));
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}
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pfree(DatumGetTextP(seqname));
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chnattrs++;
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i++;
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}
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if (chnattrs > 0)
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{
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rettuple = SPI_modifytuple(rel, rettuple, chnattrs, chattrs, newvals, NULL);
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if (rettuple == NULL)
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/* internal error */
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elog(ERROR, "autoinc (%s): %d returned by SPI_modifytuple",
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relname, SPI_result);
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}
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pfree(relname);
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pfree(chattrs);
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pfree(newvals);
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return PointerGetDatum(rettuple);
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}
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