関連ワード:  oracle max_string_size extended    oracle max_string_size extended performance    oracle max_string_size extended 19c    oracle set max_string_size extended    oracle max_string_size standard vs extended    oracle change max_string_size to extended    oracle change max_string_size from extended to standard    oracle alter system set max_string_size extended    max_string_size extended oracle 12c    change max_string_size to extended oracle 19c