Function save_query_text_state

src/bin/psql/command.c:2989–2997

* Prepare to possibly restore query buffer to its current state * (cf. discard_query_text). * * We need to remember the length of the query buffer, and the lexer's * notion of the parenthesis nesting depth. */

 * notion of the parenthesis nesting depth.
 */
static void
save_query_text_state(PsqlScanState scan_state, ConditionalStack cstack,
					  PQExpBuffer query_buf)
{
	if (query_buf)
		conditional_stack_set_query_len(cstack, query_buf->len);
	conditional_stack_set_paren_depth(cstack,
									  psql_scan_get_paren_depth(scan_state));
}

/*
 * Discard any query text absorbed during an inactive conditional branch.