Function exec_command_g

src/bin/psql/command.c:1357–1403

* \g [(pset-option[=pset-value] ...)] [filename/shell-command] * \gx [(pset-option[=pset-value] ...)] [filename/shell-command] * * Send the current query. If pset options are specified, they are made * active just for this query. If a filename or pipe command is given, * the query output goes there. \gx implicitly sets "expanded=on" along * with any other pset options that are specified.

 * with any other pset options that are specified.
 */
static backslashResult
exec_command_g(PsqlScanState scan_state, bool active_branch, const char *cmd)
{
	backslashResult status = PSQL_CMD_SKIP_LINE;
	char	   *fname;

	/*
	 * Because the option processing for this is fairly complicated, we do it
	 * and then decide whether the branch is active.
	 */
	fname = psql_scan_slash_option(scan_state,
								   OT_FILEPIPE, NULL, false);

	if (fname && fname[0] == '(')
	{
		/* Consume pset options through trailing ')' ... */
		status = process_command_g_options(fname + 1, scan_state,
										   active_branch, cmd);
		free(fname);
		/* ... and again attempt to scan the filename. */
		fname = psql_scan_slash_option(scan_state,
									   OT_FILEPIPE, NULL, false);
	}

	if (status == PSQL_CMD_SKIP_LINE && active_branch)
	{
		if (!fname)
			pset.gfname = NULL;
		else
		{
			expand_tilde(&fname);
			pset.gfname = pg_strdup(fname);
		}
		if (strcmp(cmd, "gx") == 0)
		{
			/* save settings if not done already, then force expanded=on */
			if (pset.gsavepopt == NULL)
				pset.gsavepopt = savePsetInfo(&pset.popt);
			pset.popt.topt.expanded = 1;
		}
		status = PSQL_CMD_SEND;
	}

	free(fname);

	return status;
}

/*
 * Process parenthesized pset options for \g