Manual de Referência do MySQL :: D.4.52 Alterações na distribuição 3.23.9

Fixed problem that affected queries that did arithmetic on group functions.

Fixed problem with timestamps and INSERT DELAYED.

Fixed that date_col BETWEEN const_date AND const_date works.

Fixed problem when only changing a 0 to NULL in a table with BLOB/TEXT columns.

Fixed bug in range optimiser when using many key parts and or on the middle key parts: WHERE K1=1 and K3=2 and (K2=2 and K4=4 or K2=3 and K4=5)

Added source command to mysql to allow reading of batch files inside the mysql client. Original patch by Matthew Vanecek.

Fixed critical problem with the WITH GRANT OPTION option.

Don't give an unnecessary GRANT error when using tables from many databases in the same query.

Added VIO wrapper (needed for SSL support; by Andrei Errapart and Tõnu Samuel).

Fixed optimiser problem on SELECT when using many overlapping indexes. MySQL should now be able to choose keys even better when there are many keys to choose from.

Changed optimiser to prefer a range key instead of a ref key when the range key can uses more columns than the ref key (which only can use columns with =). For example, the following type of queries should now be faster: SELECT * from key_part_1=const and key_part_2 > const2

Fixed bug that a change of all VARCHAR columns to CHAR columns didn't change row type from dynamic to fixed.

Disabled floating-point exceptions for FreeBSD to fix core dump when doing SELECT FLOOR(POW(2,63)).

Renamed mysqld startup option from --delay-key-write to --delay-key-write-for-all-tables.

Added read-next-on-key to HEAP tables. This should fix all problems with HEAP tables when using non-UNIQUE keys.

Added option to print default arguments to all clients.

Added --log-slow-queries option to mysqld to log all queries that take a long time to a separate log file with a time indicating how long the query took.

Fixed core dump when doing WHERE key_col=RAND(...).

Fixed optimization bug in SELECT ... LEFT JOIN ... key_col IS NULL, when key_col could contain NULL values.

Fixed problem with 8-bit characters as separators in LOAD DATA INFILE.