enable_quoted_identifiers: This setting affects the way Aster Database processes strings enclosed in double-quote characters ("..."). With enable_quoted_identifiers='on' (the default), Aster Database follows the standard behavior of interpreting each double-quoted string as an identifier (a column, table, schema, or function name). With enable_quoted_identifiers='off', each double-quoted string is interpreted as a literal string constant. Any printable character may be represented in a double-quoted string.