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/*--------------------------------------------------------------------------
*
* test_copy_callbacks.c
* Code for testing COPY callbacks.
*
* Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/test/modules/test_copy_callbacks/test_copy_callbacks.c
*
* -------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/table.h"
#include "commands/copy.h"
#include "fmgr.h"
#include "utils/rel.h"
PG_MODULE_MAGIC;
static void
to_cb(void *data, int len)
{
ereport(NOTICE,
(errmsg("COPY TO callback called with data \"%s\" and length %d",
(char *) data, len)));
}
PG_FUNCTION_INFO_V1(test_copy_to_callback);
Datum
test_copy_to_callback(PG_FUNCTION_ARGS)
{
Relation rel = table_open(PG_GETARG_OID(0), AccessShareLock);
CopyToState cstate;
int64 processed;
cstate = BeginCopyTo(NULL, rel, NULL, RelationGetRelid(rel), NULL, false,
to_cb, NIL, NIL);
processed = DoCopyTo(cstate);
EndCopyTo(cstate);
ereport(NOTICE, (errmsg("COPY TO callback has processed %lld rows",
(long long) processed)));
table_close(rel, NoLock);
PG_RETURN_VOID();
}
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