Function ProcessGUCArray

src/backend/utils/misc/guc.c:11601–11659

* Handle options fetched from pg_db_role_setting.setconfig, * pg_proc.proconfig, etc. Caller must specify proper context/source/action. * * The array parameter must be an array of TEXT (it must not be NULL). */

 * The array parameter must be an array of TEXT (it must not be NULL).
 */
void
ProcessGUCArray(ArrayType *array,
				GucContext context, GucSource source, GucAction action)
{
	int			i;

	Assert(array != NULL);
	Assert(ARR_ELEMTYPE(array) == TEXTOID);
	Assert(ARR_NDIM(array) == 1);
	Assert(ARR_LBOUND(array)[0] == 1);

	for (i = 1; i <= ARR_DIMS(array)[0]; i++)
	{
		Datum		d;
		bool		isnull;
		char	   *s;
		char	   *name;
		char	   *value;
		char	   *namecopy;
		char	   *valuecopy;

		d = array_ref(array, 1, &i,
					  -1 /* varlenarray */ ,
					  -1 /* TEXT's typlen */ ,
					  false /* TEXT's typbyval */ ,
					  TYPALIGN_INT /* TEXT's typalign */ ,
					  &isnull);

		if (isnull)
			continue;

		s = TextDatumGetCString(d);

		ParseLongOption(s, &name, &value);
		if (!value)
		{
			ereport(WARNING,
					(errcode(ERRCODE_SYNTAX_ERROR),
					 errmsg("could not parse setting for parameter \"%s\"",
							name)));
			free(name);
			continue;
		}

		/* free malloc'd strings immediately to avoid leak upon error */
		namecopy = pstrdup(name);
		free(name);
		valuecopy = pstrdup(value);
		free(value);

		(void) set_config_option(namecopy, valuecopy,
								 context, source,
								 action, true, 0, false);

		pfree(namecopy);
		pfree(valuecopy);
		pfree(s);
	}