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GNU Info (mysql.info)News-3.20.6Changes in release 3.20.6 ------------------------- * Portable to more systems because of MIT-pthreads, which will be used automatically if `configure' cannot find a `-lpthreads' library. * Added GNU-style long options to almost all programs. Test with `program --help'. * Some shared library support for Linux. * The FAQ is now in `.texi' format and is available in `.html', `.txt' and `.ps' formats. * Added new SQL function `RAND([init])'. * Changed `sql_lex' to handle `\0' unquoted, but the client can't send the query through the C API, because it takes a str pointer. You must use `mysql_real_query()' to send the query. * Added API function `mysql_get_client_info()'. * `mysqld' now uses the `N_MAX_KEY_LENGTH' from `nisam.h' as the maximum allowed key length. * The following now works: mysql> SELECT filter_nr,filter_nr FROM filter ORDER BY filter_nr; Previously, this resulted in the error: `Column: 'filter_nr' in order clause is ambiguous'. * `mysql' now outputs `'\0'', `'\t'', `'\n'' and `'\\'' when encountering ASCII 0, tab, newline or `'\'' while writing tab-separated output. This is to allow printing of binary data in a portable format. To get the old behavior, use `-r' (or `--raw'). * Added german error messages (60 of 80 error messages translated). * Added new API function `mysql_fetch_lengths(MYSQL_RES *)', which returns an array of column lengths (of type `uint'). * Fixed bug with `IS NULL' in `WHERE' clause. * Changed the optimizer a little to get better results when searching on a key part. * Added `SELECT' option `STRAIGHT_JOIN' to tell the optimizer that it should join tables in the given order. * Added support for comments starting with `'--'' in `mysql.cc' (Postgres syntax). * You can have `SELECT' expressions and table columns in a `SELECT' which are not used in the group part. This makes it efficient to implement lookups. The column that is used should be a constant for each group because the value is calculated only once for the first row that is found for a group. mysql> SELECT id,lookup.text,sum(*) FROM test,lookup WHERE test.id=lookup.id GROUP BY id; * Fixed bug in `SUM(function)' (could cause a core dump). * Changed `AUTO_INCREMENT' placement in the SQL query: INSERT into table (auto_field) values (0); inserted 0, but it should insert an `AUTO_INCREMENT' value. * `mysqlshow.c': Added number of records in table. Had to change the client code a little to fix this. * `mysql' now allows doubled `''' or `""' within strings for embedded `'' or `"'. * New math functions: `EXP()', `LOG()', `SQRT()', `ROUND()', `CEILING()'. automatically generated by info2www version 1.2.2.9 |