manual.texi Change note mods, 3.23.25 to 3.23.38.

means that you have found a bug in MySQL or you have a corrupted

table. @xref{Crashing}.

To get a core dump on Linux if @code{mysqld} dies with a SIGSEGV signal,

To get a core dump on Linux if @code{mysqld} dies with a @code{SIGSEGV} signal,

you can start @code{mysqld} with the @code{--core-file} option.  Note

that you also probably need to raise the @code{core file size} by adding

@code{ulimit -c 1000000} to @code{safe_mysqld} or starting

Fixed a bug when @code{SELECT} from @code{MERGE} table

sometimes results in incorrectly ordered rows.

@item

Fixed a bug in @code{REPLACE()} when using the ujis character set.

Fixed a bug in @code{REPLACE()} when using the @code{ujis} character set.

@item

Applied Sleepycat BDB patches 3.2.9.1 and 3.2.9.2.

@item

Added option @code{--skip-stack-trace} to @code{mysqld}.

Added @code{--skip-stack-trace} option to @code{mysqld}.

@item

@code{CREATE TEMPORARY} now works with @code{InnoDB} tables.

@item

@item

Added @code{Rows_examined} to slow query log.

@item

Fixed problems with function returning empty string when using

together with a group functions and a @code{WHERE} that didn't match any rows.

Fixed problems with function returning empty string when used together with

a group function and a @code{WHERE} that didn't match any rows.

@item

New program @code{mysqlcheck}.

@item

@code{LOCK TABLE to_table WRITE,...; INSERT INTO to_table... SELECT ...}

when @code{to_table} was empty.

@item

Fixed bug with @code{LOCK TABLE} and BDB tables.

Fixed bug with @code{LOCK TABLE} and @code{BDB} tables.

@end itemize

@item

Fixed a bug when using @code{HEAP} tables with @code{LIKE}.

@item

Added @code{--mysql-version} to @code{safe_mysqld}

Added @code{--mysql-version} option to @code{safe_mysqld}

@item

Changed @code{INNOBASE} to @code{InnoDB} (because the @code{INNOBASE}

name was already used). All @code{configure} options and @code{mysqld}

start options are now using @code{innodb} instead of @code{innobase}. This

means that you have to change any configuration files where you have used

@code{innobase} options before upgrading to this version!

start options now use @code{innodb} instead of @code{innobase}. This

means that before upgrading to this version, you have to change any

configuration files where you have used @code{innobase} options!

@item

Fixed bug when using indexes on @code{CHAR(255) NULL} columns.

@item

Slave thread will now be started even if @code{master-host} is not set, as

long as @code{server-id} is set and valid @code{master.info} is present

long as @code{server-id} is set and valid @code{master.info} is present.

@item

Partial updates (terminated with kill) are now logged with a special error

code to the binary log. Slave will refuse to execute them if the error code

check/correction of data integrity.

@item

Fixed bug that erroneously logged a drop of internal temporary table

on thread termination to the binary log - bug affected replication.

on thread termination to the binary log -- this bug affected replication.

@item

Fixed a bug in @code{REGEXP()} on 64-bit machines.

Fixed a bug in @code{REGEXP} on 64-bit machines.

@item

@code{UPDATE} and @code{DELETE} with @code{WHERE unique_key_part IS NULL}

didn't update/delete all rows.

Fixed bug when using date functions on @code{TEXT}/@code{BLOB} column

with wrong date format.

@item

UDFs now also work on Windows. (Patch by Ralph Mason)

UDFs now also work on Windows. (Patch by Ralph Mason.)

@item

Fixed bug in @code{ALTER TABLE} and @code{LOAD DATA INFILE} that disabled

key-sorting. These commands should now be faster in most cases.

waiting for @code{FLUSH} or @code{REPAIR}) would not use indexes for the

next query.

@item

Fixed problem with @code{ALTER TABLE} to InnoDB tables on FreeBSD.

Fixed problem with @code{ALTER TABLE} to @code{InnoDB} tables on FreeBSD.

@item

Added @code{mysqld} variables @code{myisam_max_sort_file_size} and

@code{myisam_max_extra_sort_file_size}.

@item

Initialise signals early to avoid problem with signals in InnoDB.

Initialise signals early to avoid problem with signals in @code{InnoDB}.

@item

Applied patch for the @code{tis620} character set to make comparisons

case-independent and to fix a bug in @code{LIKE} for this character set.

@itemize @bullet

@item

Fixed a bug that allowed you to use database names containing a @samp{.}

Fixed a bug that allowed use of database names containing a @samp{.}

character.  This fixes a serious security issue when @code{mysqld} is run

as root.

@item

Fixed some problems with @code{FLUSH TABLES} and @code{TEMPORARY} tables.

(Problem with freeing the key cache and error @code{Can't reopen table...}.)

@item

Fixed a problem in InnoDB with other character sets than @code{latin1}

Fixed a problem in @code{InnoDB} with other character sets than @code{latin1}

and another problem when using many columns.

@item

Fixed bug that caused a core dump when using a very complex query involving

@item

Added @code{SELECT ... FOR UPDATE}.

@item

Fixed bug where the number of affected rows was not returned when @code{MySQL}

Fixed bug where the number of affected rows was not returned when MySQL

was compiled without transaction support.

@item

Fixed a bug in @code{UPDATE} where keys weren't always used to find the

rows to be updated.

@item

Fixed a bug in @code{CONCAT_WS()} where it returned wrong results.

Fixed a bug in @code{CONCAT_WS()} where it returned incorrect results.

@item

Changed @code{CREATE ... INSERT} and @code{INSERT ... SELECT} to not

allow concurrent inserts as this could make the binary log hard to repeat.

(Concurrent inserts are enabled if you are not using the binary or update log.)

@item

Changed some macros to be able to use fast mutex with glibc 2.2.

Changed some macros to be able to use fast mutex with @code{glibc} 2.2.

@end itemize

@item

Tuned @code{SHOW ANALYZE} for small tables.

@item

Fixed handling of arguments in the benchmark script @file{run-all-tests}.

Fixed handling of arguments in the benchmark script @code{run-all-tests}.

@end itemize

a thread to hang.

@item

@code{REPLACE} will not replace a row that conflicts with an

@code{auto_increment} generated key.

@code{AUTO_INCREMENT} generated key.

@item

@code{mysqld} now only sets @code{CLIENT_TRANSACTIONS} in

@code{mysql->server_capabilities} if the server supports a

@item

Fixed bug in @code{ALTER TABLE ... ORDER BY}.

@item

Added option @code{max_user_connections} to @code{mysqld}.

Added @code{max_user_connections} variable to @code{mysqld}.

@item

Limit query length for replication by @code{max_allowed_packet}, not the

arbitrary limit of 4 MB.

Fixed problem in automatic repair that could leave some threads in state

@code{Waiting for table}.

@item

@code{SHOW CREATE TABLE} now dumps the @code{UNION()} for @code{MERGE} tables.

@code{SHOW CREATE TABLE} now displays the @code{UNION()} for @code{MERGE}

tables.

@item

@code{ALTER TABLE} now remembers the old @code{UNION()} definition.

@item

This ensures that one gets same values for date functions like @code{NOW()}

when using @code{mysqlbinlog} to pipe the queries to another server.

@item

Allow one to use @code{--skip-gemini}, @code{--skip-bdb} and

@code{--skip-innodb} to @code{mysqld} even if these databases are not

compiled in @code{mysqld}.

Allow @code{--skip-gemini}, @code{--skip-bdb}, and @code{--skip-innodb}

options to be specified when invoking @code{mysqld}, even if these table

handlers are not compiled in to @code{mysqld}.

@item

One can now do @code{GROUP BY ... DESC}.

@item

@itemize @bullet

@item

Fixed that DNS lookups are not using the same mutex as the hostname

Fixed DNS lookups not to use the same mutex as the hostname

cache.  This will enable known hosts to be quickly resolved even if a

DNS lookup takes a long time.

@item

Added @code{--character-sets-dir} to @code{myisampack}.

Added @code{--character-sets-dir} option to @code{myisampack}.

@item

Removed warnings when running @code{REPAIR TABLE ... EXTENDED}.

@item

@item

Fixed bug where @code{CASE} didn't work with @code{GROUP BY}.

@item

Added option @code{--sort-recover} to @code{myisamchk}.

Added @code{--sort-recover} option to @code{myisamchk}.

@item

@code{myisamchk -S} and @code{OPTIMIZE TABLE} now work on Windows.

@item

Fixed bug when using @code{DISTINCT} on results from functions that referred

to a group function, like:

@example

SELECT a, DISTINCT SEC_TO_TIME(sum(a)) from table_name GROUP BY a, b;

SELECT a, DISTINCT SEC_TO_TIME(sum(a))

from table_name GROUP BY a, b;

@end example

@item

Fixed buffer overrun in @code{libmysqlclient} library.

Added @code{max_binlog_size} variable; the binary log will be rotated

automatically when the size crosses the limit.

@item

Added @code{Last_error}, @code{Last_errno}, and @code{Slave_skip_counter} to

@code{SHOW SLAVE STATUS}.

Added @code{Last_error}, @code{Last_errno}, and @code{Slave_skip_counter}

variables to @code{SHOW SLAVE STATUS}.

@item

Fixed bug in @code{MASTER_POS_WAIT()} function.

@item

Added option @code{FULL} to @code{SHOW COLUMNS}. Now we show the

privilege list for the columns only if this option is given.

@item

Fixed bug in @code{SHOW LOGS} when there weren't any BDB logs.

Fixed bug in @code{SHOW LOGS} when there weren't any @code{BDB} logs.

@item

Fixed a timing problem in replication that could delay sending an update

to the client until a new update was done.

@item

@code{TRIM("foo" from "foo")} didn't return an empty string.

@item

Added @code{--with-version-suffix} to @code{configure}.

Added @code{--with-version-suffix} option to @code{configure}.

@item

Fixed coredump when client aborted connection without @code{mysql_close()}.

@item

@itemize @bullet

@item

The test suite now tests all reachable BDB interface code.  During

The test suite now tests all reachable @code{BDB} interface code.  During

testing we found and fixed many errors in the interface code.

@item

Using @code{HAVING} on an empty table could produce one result row when

it shouldn't.

@item

Fixed that the MySQL RPM is not dependent on Perl5 anymore.

Fixed the MySQL RPM not to depend on Perl5 anymore.

@item

Fixed some problems with @code{HEAP} tables on Windows.

@item

@code{HOUR()} (and some other @code{TIME} functions) on a @code{CHAR} column

always returned @code{NULL}.

@item

Fixed security bug in something (please upgrade if you are using a earlier

Fixed security bug in something (please upgrade if you are using an earlier

MySQL 3.23 version).

@item

Fixed buffer overflow bug when writing a certain error message.

Added usage of @code{setrlimit()} on Linux to get

@code{-O --open-files-limit=#} to work on Linux.

@item

Added new @code{mysqld} variable: @code{bdb_version}.

Added @code{bdb_version} variable to @code{mysqld}.

@item

Fixed bug when using expression of type:

@example

Fixed bug in @code{MyISAM} when deleting keys with possible @code{NULL}

values, but the first key-column was not a prefix-compressed text column.

@item

Fixed @code{mysql.server} to read the @code{mysql.server} option section

instead of @code{mysql_server}.

Fixed @code{mysql.server} to read the @code{[mysql.server]} option file group

rather than the @code{[mysql_server]} group.

@item

Fixed @code{safe_mysqld} and @code{mysql.server} to also read the

@code{server} option section.

Changed @code{BDB} tables to not use internal subtransactions and reuse

open files to get more speed.

@item

Added option @code{--mysqld=#} to @code{safe_mysqld}.

Added @code{--mysqld=#} option to @code{safe_mysqld}.

@item

Allow hex constants in the @code{--fields-*-by} and

@code{--lines-terminated-by} options to @code{mysqldump} and

@code{mysqlimport}. By Paul DuBois.

@item

Added option @code{--safe-show-database} to @code{mysqld}.

Added @code{--safe-show-database} option to @code{mysqld}.

@item

Added @code{have_bdb}, @code{have_gemini}, @code{have_innobase},

@code{have_raid} and @code{have_openssl} to @code{SHOW VARIABLES} to make it

easy to test for supported extensions.

@item

Added option @code{--open-files-limit} to @code{mysqld}.

Added @code{--open-files-limit} option to @code{mysqld}.

@item

Changed option @code{--open-files} to @code{--open-files-limit} in

Changed @code{--open-files} option to @code{--open-files-limit} in

@code{safe_mysqld}.

@item

Fixed a bug where some rows were not found with @code{HEAP} tables

Changed @code{--bdb-recover} to @code{--bdb-no-recover} as recover should

be on by default.

@item

Changed the default number of BDB locks to 10000.

Changed the default number of @code{BDB} locks to 10000.

@item

Fixed a bug from 3.23.29 when allocating the shared structure needed

for BDB tables.

for @code{BDB} tables.

@item

Changed @file{mysqld_multi.sh} to use configure variables. Patch by

Changed @code{mysqld_multi.sh} to use configure variables. Patch by

Christopher McCrory.

@item

Added fixing of include files for Solaris 2.8.

@item

Fixed bug in @code{<=>} operator.

@item

Fixed bug in @code{REPLACE} with BDB tables.

Fixed bug in @code{REPLACE} with @code{BDB} tables.

@item

@code{LPAD()} and @code{RPAD()} will shorten the result string if it's longer

than the length argument.

@item

Added @code{SHOW LOGS} command.

@item

Remove not used BDB logs on shutdown.

Remove unused @code{BDB} logs on shutdown.

@item

When creating a table, put @code{PRIMARY} keys first, followed by

@code{UNIQUE} keys.

Changed the default server-id to 1 for masters and 2 for slaves

to make it easier to use the binary log.

@item

Renamed variable @code{bdb_lock_max} to @code{bdb_max_lock}.

Renamed @code{bdb_lock_max} variable to @code{bdb_max_lock}.

@item

Added support for @code{auto_increment} on sub-fields for BDB tables.

Added support for @code{AUTO_INCREMENT} on sub-fields for @code{BDB} tables.

@item

Added @code{ANALYZE} of BDB tables.

Added @code{ANALYZE} of @code{BDB} tables.

@item

In BDB tables, we now store the number of rows; This helps to optimise queries

when we need an approximation of the number of rows.

In @code{BDB} tables, we now store the number of rows; This helps to optimise

queries when we need an approximation of the number of rows.

@item

If we get an error in a multi-row statement, we now only rollback the

last statement, not the entire transaction.

If you do a @code{ROLLBACK} when you have updated a non-transactional table

you will get an error as a warning.

@item

Added option @code{--bdb-shared-data} to @code{mysqld}.

Added @code{--bdb-shared-data} option to @code{mysqld}.

@item

Added status variable @code{Slave_open_temp_tables}.

Added @code{Slave_open_temp_tables} status variable to @code{mysqld}

@item

Added variables @code{binlog_cache_size} and @code{max_binlog_cache_size} to

Added @code{binlog_cache_size} and @code{max_binlog_cache_size} variables to

@code{mysqld}.

@item

@code{DROP TABLE}, @code{RENAME TABLE}, @code{CREATE INDEX} and

@code{DROP INDEX} are now transaction endpoints.

@item

If you do a @code{DROP DATABASE} on a symbolic linked database, both

If you do a @code{DROP DATABASE} on a symbolically linked database, both

the link and the original database is deleted.

@item

Fixed that @code{DROP DATABASE} works on OS/2.

@item

Fixed bug when doing a @code{SELECT DISTINCT ... table1 LEFT JOIN

table2 ...} when table2 was empty.

table2 ...} when @code{table2} was empty.

@item

Added @code{--abort-slave-event-count} and

@code{--disconnect-slave-event-count} options to @code{mysqld} for

@item

@code{SHOW KEYS} now shows whether or not key is @code{FULLTEXT}.

@item

New script @file{mysqld_multi}. @xref{mysqld_multi, , @code{mysqld_multi}}.

New script @code{mysqld_multi}. @xref{mysqld_multi, , @code{mysqld_multi}}.

@item

Added new script, @file{mysql-multi.server.sh}.  Thanks to

Tim Bunce @email{Tim.Bunce@@ig.co.uk} for modifying @file{mysql.server} to

Added new script, @code{mysql-multi.server.sh}.  Thanks to

Tim Bunce @email{Tim.Bunce@@ig.co.uk} for modifying @code{mysql.server} to

easily handle hosts running many @code{mysqld} processes.

@item

@file{safe_mysqld}, @file{mysql.server}, and @file{mysql_install_db} have

@code{safe_mysqld}, @code{mysql.server}, and @code{mysql_install_db} have

been modified to use @code{mysql_print_defaults} instead of various hacks

to read the @file{my.cnf} files.  In addition, the handling of various

paths has been made more consistent with how @code{mysqld} handles them

@item

Reset status variable which could cause problem if one used @code{--slow-log}.

@item

Added variable @code{connect_timeout} to @code{mysql} and @code{mysqladmin}.

Added @code{connect_timeout} variable to @code{mysql} and @code{mysqladmin}.

@item

Added @code{connect_timeout} as an alias for @code{timeout} for option files

Added @code{connect-timeout} as an alias for @code{timeout} for option files

read by @code{mysql_options()}.

@end itemize

@item

One can now specify @code{interactive-timeout} in the option file that

is read by @code{mysql_options()}. This makes it possible to force

programs that run for a long time (like @code{mysqlhotcopy}) to use

@code{interactive_timeout} instead of @code{wait_timeout}.

programs that run for a long time (like @code{mysqlhotcopy}) to use the

@code{interactive_timeout} time instead of the @code{wait_timeout} time.

@item

Added to the slow query log the time and the user name for each logged

query. If you are using @code{--log-long-format} then also queries that

the @file{global.h} header file to avoid a problem with bad aliasing with

the compiler submitted with RedHat 7.0. (Reported by Trond Eivind Glomsrød)

@item

The option @code{--skip-networking} now works properly on NT.

The @code{--skip-networking} option now works properly on NT.

@item

Fixed a long outstanding bug in the @code{ISAM} tables when a row with a length

of more than 65K was shortened by a single byte.

Allow one to use @code{FLUSH TABLE tablename}.

@item

Added @code{--replicate-ignore-table}, @code{--replicate-do-table},

 @code{--replicate-wild-ignore-table}, @code{--replicate-wild-do-table}.

@code{--replicate-wild-ignore-table}, and @code{--replicate-wild-do-table}

options to @code{mysqld}.

@item

Changed all log files to use our own @code{IO_CACHE} mechanism instead of

@code{FILE} to avoid OS problems when there are many files open.

@item

Added options @code{--open-files} and @code{--timezone} to @code{safe_mysqld}.

Added @code{--open-files} and @code{--timezone} options to @code{safe_mysqld}.

@item

Fixed a fatal bug in @code{CREATE TEMPORARY TABLE ... SELECT ...}.

@item

@item

Fixed a bug in a BDB key compare function when comparing part keys.

@item

Added variable @code{bdb_lock_max} to @code{mysqld}.

Added @code{bdb_lock_max} variable to @code{mysqld}.

@item

Added more tests to the benchmark suite.

@item

Added @code{SHOW MASTER LOGS}.

@item

Added @code{--safemalloc-mem-limit} option to @code{mysqld} to simulate memory

shortage when compiled @code{--with-debug=full}.

shortage when compiled with the @code{--with-debug=full} option.

@item

Fixed several coredumps in out-of-memory conditions.

@item

@itemize @bullet

@item

Fixed a bug where the automatic repair of MyISAM tables sometimes failed

Fixed a bug where the automatic repair of @code{MyISAM} tables sometimes failed

when the data file was corrupt.

@item

Fixed a bug in @code{SHOW CREATE} when using @code{AUTO_INCREMENT} columns.

@item

Changed BDB tables to use new compare function in Berkeley DB 3.2.3.

Changed @code{BDB} tables to use new compare function in Berkeley DB 3.2.3.

@item

You can now use Unix sockets with @code{mit-pthreads}.

@item

Added the latin5 (turkish) character set.

Added the @code{latin5} (turkish) character set.

@item

Small portability fixes.

@end itemize

Fixed a problem with @code{SUBSTRING_INDEX()} and @code{REPLACE()}.

(Patch by Alexander Igonitchev)

@item

Fix @code{CREATE TEMPORARY TABLE IF NOT EXISTS} not to give an error

Fix @code{CREATE TEMPORARY TABLE IF NOT EXISTS} not to produce an error

if the table exists.

@item

If you don't create a @code{PRIMARY KEY} in a BDB table, a hidden

If you don't create a @code{PRIMARY KEY} in a @code{BDB} table, a hidden

@code{PRIMARY KEY} will be created.

@item

Added read-only-key optimisation to BDB tables.

Added read-only-key optimisation to @code{BDB} tables.

@item

@code{LEFT JOIN} in some cases preferred a full table scan when there was

no @code{WHERE} clause.

@item

Removed the @code{TYPE=} keyword from @code{CHECK} and

@code{REPAIR}. Allow @code{CHECK} options to be combined. (You can still

use @code{TYPE=} but this usage is deprecated.)

use @code{TYPE=}, but this usage is deprecated.)

@item

Fixed mutex bug in the binary replication log - long update queries could

Fixed mutex bug in the binary replication log -- long update queries could

be read only in part by the slave if it did it at the wrong time, which

was not fatal, but resulted in a performance-degrading reconnect and

a scary message in the error log.

@item

Changed the format of the binary log - added magic number, server

Changed the format of the binary log -- added magic number, server

version, binlog version. Added server id and query error code for each

query event.

@item

from some of the tables.

@item

Allow floating-point numbers where there is no sign after the exponent

(like 1e1).

(like @code{1e1}).

@item

@code{SHOW GRANTS} didn't always show all column grants.

@item

Added @code{--default-extra-file=#} to all MySQL clients.

Added @code{--default-extra-file=#} option to all MySQL clients.

@item

Columns referenced in @code{INSERT} statements now are initialised properly.

@item

@item

Fixed that @code{databasename} works as second argument to @code{mysqlhotcopy}.

@item

@code{UMASK} and @code{UMASK_DIR} can now be specified in octal.

The values for the @code{UMASK} and @code{UMASK_DIR} environment variables

now can be specified in octal by beginning the value with a zero.

@item

Added @code{RIGHT JOIN}. This makes @code{RIGHT} a reserved word.

@item

@item

Fixed crash when using @code{CHECK TABLE} on Windows.

@item

Fixed a bug where @code{FULLTEXT} index always used the koi8_ukr

Fixed a bug where @code{FULLTEXT} index always used the @code{koi8_ukr}

character set.

@item

Fixed privilege checking for @code{CHECK TABLE}.

@item

The @code{MyISAM} repair/reindex code didn't use the @code{--tempdir}

The @code{MyISAM} repair/reindex code didn't use the @code{--tmpdir}

option for its temporary files.

@item

Added @code{BACKUP TABLE/RESTORE TABLE}.

Added @code{BACKUP TABLE} and @code{RESTORE TABLE}.

@item

Fixed coredump on @code{CHANGE MASTER TO} when the slave did not have

the master to start with.

Fixed a core dump bug when doing @code{FLUSH MASTER} if you didn't specify

a filename argument to @code{--log-bin}.

@item

Added missing @file{ha_berkeley.x} files to the MySQL Windows

Added missing @file{ha_berkeley.x} files to the MySQL Windows distribution.

@item

Fixed some mutex bugs in the log code that could cause thread blocks if new

log files couldn't be created.

@code{HEAP} tables didn't use keys properly. (Bug from 3.23.23.)

@item

Added better support for @code{MERGE} tables (keys, mapping, creation,

documentation...). @xref{MERGE}.

documentation...). @xref{MERGE, , @code{MERGE}}.

@item

Fixed bug in @code{mysqldump} from 3.23 which caused some @code{CHAR} columns

not to be quoted.

@item

Added a lot of new statistics variables.

@item

Fixed @code{ORDER BY} bug with BDB tables.

Fixed @code{ORDER BY} bug with @code{BDB} tables.

@item

Removed warning that @code{mysqld} couldn't remove the @file{.pid} file

under Windows.

@item

Changed @code{--log-isam} to log @strong{MyISAM} tables instead of isam

Changed @code{--log-isam} to log @code{MyISAM} tables instead of isam

tables.

@item

Fixed @code{CHECK TABLE} to work on Windows.

must be repaired with @code{REPAIR TABLE} or @code{myisamchk} before use!

@item

Added @code{--core-file} option to @code{mysqld} to get a core file on

Linux if @code{mysqld} dies on the SIGSEGV signal.

Linux if @code{mysqld} dies on the @code{SIGSEGV} signal.

@item

MySQL client @code{mysql} now starts with option

@code{--no-named-commands} (@code{-g}) by default. This option can be