Function exec_command_sf_sv

src/bin/psql/command.c:2385–2485

* \sf/\sv -- show a function/view's source code */

 * \sf/\sv -- show a function/view's source code
 */
static backslashResult
exec_command_sf_sv(PsqlScanState scan_state, bool active_branch,
				   const char *cmd, bool is_func)
{
	backslashResult status = PSQL_CMD_SKIP_LINE;

	if (active_branch)
	{
		bool		show_linenumbers = (strchr(cmd, '+') != NULL);
		PQExpBuffer buf;
		char	   *obj_desc;
		Oid			obj_oid = InvalidOid;
		EditableObjectType eot = is_func ? EditableFunction : EditableView;

		buf = createPQExpBuffer();
		obj_desc = psql_scan_slash_option(scan_state,
										  OT_WHOLE_LINE, NULL, true);
		if (pset.sversion < (is_func ? 80400 : 70400))
		{
			char		sverbuf[32];

			formatPGVersionNumber(pset.sversion, false,
								  sverbuf, sizeof(sverbuf));
			if (is_func)
				pg_log_error("The server (version %s) does not support showing function source.",
							 sverbuf);
			else
				pg_log_error("The server (version %s) does not support showing view definitions.",
							 sverbuf);
			status = PSQL_CMD_ERROR;
		}
		else if (!obj_desc)
		{
			if (is_func)
				pg_log_error("function name is required");
			else
				pg_log_error("view name is required");
			status = PSQL_CMD_ERROR;
		}
		else if (!lookup_object_oid(eot, obj_desc, &obj_oid))
		{
			/* error already reported */
			status = PSQL_CMD_ERROR;
		}
		else if (!get_create_object_cmd(eot, obj_oid, buf))
		{
			/* error already reported */
			status = PSQL_CMD_ERROR;
		}
		else
		{
			FILE	   *output;
			bool		is_pager;

			/* Select output stream: stdout, pager, or file */
			if (pset.queryFout == stdout)
			{
				/* count lines in function to see if pager is needed */