This appendix lists the enhancements and changes from version to
version in MySQL Community Server. This information is updated as
bugs are fixed and features are incorporated, so that everybody can
follow the development process.
Note that we tend to update the manual at the same time we make
changes to MySQL. If you find a recent version of MySQL listed here
that you can't find on our download page
(http://dev.mysql.com/downloads/), it means that the version has
not yet been released (and will normally be marked so in the
appropriate Release Note section).
The date mentioned with a release version is the date of the last
change done internally at MySQL AB (the BitKeeper ChangeSet) on
which the release was based, not the date when the packages were
made available. The binaries are usually made available a few days
after the date of the tagged ChangeSet, because building and testing
all packages takes some time.
This section documents all enhancements, changes, and bug fixes made
to MySQL Community Server from 5.0.27 on. For changes and bug fixes
to earlier versions, see Appendix E, MySQL Change History.
D.1.1. Release Notes for MySQL Community Server 5.0.41 (01 May 2007)
This is a bugfix release for the current production release
family. It replaces MySQL 5.0.37.
Functionality added or changed:
If you use SSL for a client connection, you can tell the
client not to authenticate the server certificate by
specifying neither --ssl-ca nor
--ssl-capath. The server still verifies the
client according to any applicable requirements established
via GRANT statements for the client, and it
still uses any
--ssl-ca/--ssl-capath values
that were passed to server at startup time. (Bug#25309)
Prefix lengths for columns in SPATIAL
indexes are no longer displayed in SHOW CREATE
TABLE output. mysqldump uses that
statement, so if a table with SPATIAL
indexes containing prefixed columns is dumped and reloaded,
the index is created with no prefixes. (The full column width
of each column is indexed.) (Bug#26794)
The output of mysql --xml
and mysqldump --xml now
includes a valid XML namespace. (Bug#25946)
The mysql_create_system_tables script was
removed because mysql_install_db no longer
uses it in MySQL 5.0.
Binary distributions for some platforms did not include shared
libraries; now shared libraries are shipped for all platforms
except AIX 5.2 64-bit. (Bug#13450, Bug#16520, Bug#26767)
NDB Cluster: It is now possible to restore
selected databases or tables using
ndb_restore. (Bug#26899)
NDB Cluster: Several options have been
added for use with ndb_restore
--print_data to facilitate the
creation of data dump files. (Bug#26900)
If a set function S with an outer
reference
S(outer_ref)
cannot be aggregated in the outer query against which the
outer reference has been resolved, MySQL interprets
S(outer_ref)
the same way that it would interpret
S(const).
However, standard SQL requires throwing an error in this
situation. An error now is thrown for such queries if the
ANSI SQL mode is enabled. (Bug#27348)
To satisfy different user requirements, we provide several
servers. mysqld is an optimized server that
is a smaller, faster binary. Each package now also includes
mysqld-debug, which is compiled with
debugging support but is otherwise configured identically to
the non-debug server.
Added the --secure-file-priv option for
mysql-test-run.pl, which limits the effect
of the load_file command for
mysqltest and for the LOAD
DATA and SELECT ... INTO OUTFILE
statements to work with files in a given directory. (Bug#18628)
Added the hostname system variable, which
the server sets at startup to the server hostname.
The server now includes a timestamp in error messages that are
logged as a result of unhandled signals (such as
mysqld got signal 11 messages). (Bug#24878)
NDB Cluster: NDB tables
having MEDIUMINT AUTO_INCREMENT columns
were not restored correctly by ndb_restore,
causing spurious duplicate key errors. This issue did not
affect TINYINT, INT, or
BIGINT columns with
AUTO_INCREMENT. (Bug#27775)
NDB Cluster: NDB tables
with indexes whose names contained space characters were not
restored correctly by ndb_restore (the
index names were truncated). (Bug#27758)
NDB Cluster: Some queries that updated
multiple tables were not backed up correctly. (Bug#27748)
NDB Cluster: Joins on multiple tables
containing BLOB columns could cause data
nodes run out of memory, and to crash with the error
NdbObjectIdMap::expand unable to
expand. (Bug#26176)
NDB Cluster (APIs): Using
NdbBlob::writeData() to write data in the
middle of an existing blob value (that is, updating the value)
could overwrite some data past the end of the data to be
changed. (Bug#27018)
NDB Cluster: Under certain rare
circumstances, DROP TABLE or
TRUNCATE of an NDB table
could cause a node failure or forced cluster shutdown. (Bug#27581)
NDB Cluster: Memory usage of a
mysqld process grew even while idle. (Bug#27560)
NDB Cluster: In some cases, AFTER
UPDATE and AFTER DELETE triggers
on NDB tables that referenced subject table
did not see the results of operation which caused invocation
of the trigger, but rather saw the row as it was prior to the
update or delete operation.
This was most noticeable when an update operation used a
subquery to obtain the rows to be updated. An example would be
UPDATE tbl1 SET col2 = val1 WHERE tbl1.col1 IN
(SELECT col3 FROM tbl2 WHERE c4 = val2) where there
was an AFTER UPDATE trigger on table
tbl1. In such cases, the trigger would fail
to execute.
The problem occurred because the actual update or delete
operations were deferred to be able to perform them later as
one batch. The fix for this bug solves the problem by
disabling this optimization for a given update or delete if
the table has an AFTER trigger defined for
this operation. (Bug#26242)
NDB Cluster: Condition pushdown did not
work with prepared statements. (Bug#26225)
NDB Cluster: When trying to create tables
on an SQL node not connected to the cluster, a misleading
error message Table
'tbl_name' already
exists was generated. The error now generated is
Could not connect to storage engine.
(Bug#18676)
NDB Cluster: Error messages displayed when
running in single user mode were inconsistent. (Bug#27021)
NDB Cluster: On Solaris, the value of an
NDB table column declared as
BIT(33) was always displayed as
0. (Bug#26986)
NDB Cluster: The output from
ndb_restore --print_data
was incorrect for a backup made of a database containing
tables with TINYINT or
SMALLINT columns. (Bug#26740)
NDB Cluster: After entering single user
mode it was not possible to alter non-NDB
tables on any SQL nodes other than the one having sole access
to the cluster. (Bug#25275)
NDB Cluster: The failure of a data node
while restarting could cause other data nodes to hang or
crash. (Bug#27003)
NDB Cluster: The management client command
node_id STATUS
displayed the message Node
node_id: not connected
when node_id was not the node ID of
a data node. (Bug#21715)
NDB Cluster: It was not possible to set
LockPagesInMainMemory equal to
0. (Bug#27291)
NDB Cluster: A race condition could
sometimes occur if the node acting as master failed while node
IDs were still being allocated during startup. (Bug#27286)
NDB Cluster: When a data node was taking
over as the master node, a race condition could sometimes
occur as the node was assuming responsibility for handling of
global checkpoints. (Bug#27283)
NDB Cluster: mysqld
processes would sometimes crash under high load. (Bug#26825)
NDB Cluster: Some values of
MaxNoOfTables caused the error
Job buffer congestion to occur. (Bug#19378)
Some equi-joins containing a WHERE clause
that included a NOT IN subquery caused a
server crash. (Bug#27870)
Windows binaries contained no debug symbol file. Now
.map and .pdb files
are included in 32-bit builds for
mysqld-nt.exe,
mysqld-debug.exe, and
mysqlmanager.exe. (Bug#26893)
The test for the
MYSQL_OPT_SSL_VERIFY_SERVER_CERT option for
mysql_options() was performed incorrectly.
Also changed as a result of this bugfix: The
arg option for the
mysql_options() C API function was changed
from char * to void *.
(Bug#24121)
The range optimizer could consume a combinatorial amount of
memory for certain classes of WHERE
clauses. (Bug#26624)
Conversion of DATETIME values in numeric
contexts sometimes did not produce a double
(YYYYMMDDHHMMSS.uuuuuu) value. (Bug#16546)
Passing nested row expressions with different structures to an
IN predicate caused a server crash. (Bug#27484)
SELECT DISTINCT could return incorrect
results if the select list contained duplicated columns. (Bug#27659)
A subquery could get incorrect values for references to outer
query columns when it contained aggregate functions that were
aggregated in outer context. (Bug#27321)
In some cases, the optimizer preferred a range or full index
scan access method over lookup access methods when the latter
were much cheaper. (Bug#19372)
Duplicates were not properly identified among (potentially)
long strings used as arguments for
GROUP_CONCAT(DISTINCT). (Bug#26815)
For InnoDB, fixed consistent-read behavior
of the first read statement, if the read was served from the
query cache, for the READ COMMITTED
isolation level. (Bug#21409)
The decimal.h header file was incorrectly
omitted from binary distributions. (Bug#27456)
Duplicate members in SET definitions were
not detected. Now they result in a warning; if strict SQL mode
is enabled, an error occurs instead. (Bug#27069)
For INSERT INTO ... SELECT where index
searches used column prefixes, insert errors could occur when
key value type conversion was done. (Bug#26207)
For SHOW ENGINE INNODB STATUS, the
LATEST DEADLOCK INFORMATION was not always
cleared properly. (Bug#25494)
mysqldump could crash or exhibit incorrect
behavior when some options were given very long values, such
as --fields-terminated-by="some very long
string". The code has been cleaned up
to remove a number of fixed-sized buffers and to be more
careful about error conditions in memory allocation. (Bug#26346)
Setting a column to NOT NULL with an
ON DELETE SET NULL clause foreign key
crashes the server. (Bug#25927)
The values displayed for the
Innodb_row_lock_time,
Innodb_row_lock_time_avg, and
Innodb_row_lock_time_max status variables
were incorrect. (Bug#23666)
COUNT(decimal_expr)
sometimes generated a spurious truncation warning. (Bug#21976)
With NO_AUTO_VALUE_ON_ZERO SQL mode
enabled, LOAD DATA operations could assign
incorrect AUTO_INCREMENT values. (Bug#27586)
Incorrect results could be returned for some queries that
contained a select list expression with IN
or BETWEEN together with an ORDER
BY or GROUP BY on the same
expression using NOT IN or NOT
BETWEEN. (Bug#27532)
Queries containing subqueries with COUNT(*)
aggregated in an outer context returned incorrect results.
This happened only if the subquery did not contain any
references to outer columns. (Bug#27257)
Use of an aggregate function from an outer context as an
argument to GROUP_CONCAT() caused a server
crash. (Bug#27229)
REPAIR TABLE ... USE_FRM with an
ARCHIVE table deleted all records from the
table. (Bug#26138)
On Windows, debug builds of mysqld could
fail with heap assertions. (Bug#25765)
On Windows, debug builds of mysqlbinlog
could fail with a memory error. (Bug#23736)
String truncation upon insertion into an integer or year
column did not generate a warning (or an error in strict
mode). (Bug#26359, Bug#27176)
In out-of-memory conditions, the server might crash or
otherwise not report an error to the Windows event log. (Bug#27490)
The temporary file-creation code was cleaned up on Windows to
improve server stability. (Bug#26233)
Out-of-memory errors for slave I/O threads were not reported.
Now they are written to the error log. (Bug#26844)
mysqldump crashed for
MERGE tables if the
--complete-insert (-c)
option was given. (Bug#25993)
In certain situations, MATCH ... AGAINST
returned false hits for NULL values
produced by LEFT JOIN when no full-text
index was available. (Bug#25729)
OPTIMIZE TABLE might fail on Windows when
it attempts to rename a temporary file to the original name if
the original file had been opened, resulting in loss of the
.MYD file. (Bug#25521)
GRANT statements were not replicated if the
server was started with the
--replicate-ignore-table or
--replicate-wild-ignore-table option. (Bug#25482)
A problem in handling of aggregate functions in subqueries
caused predicates containing aggregate functions to be ignored
during query execution. (Bug#24484)
Improved out-of-memory detection when sending logs from a
master server to slaves, and log a message when allocation
fails. (Bug#26837)
MBROverlaps() returned incorrect values in
some cases. (Bug#24563)
SHOW CREATE VIEW qualified references to
stored functions in the view definition with the function's
database name, even when the database was the default
database. This affected mysqldump (which
uses SHOW CREATE VIEW to dump views)
because the resulting dump file could not be used to reload
the database into a different database. SHOW CREATE
VIEW now suppresses the database name for references
to functions in the default database. (Bug#23491)
With innodb_file_per_table enabled,
attempting to rename an InnoDB table to a
non-existent database caused the server to exit. (Bug#27381)
mysql_install_db could terminate with an
error after failing to determine that a system table already
existed. (Bug#27022)
For InnoDB tables having a clustered index
that began with a CHAR or
VARCHAR column, deleting a record and then
inserting another before the deleted record was purged could
result in table corruption. (Bug#26835)
Selecting the result of AVG() within a
UNION could produce incorrect values. (Bug#24791)
An INTO OUTFILE clause is allowed only for
the final SELECT of a
UNION, but this restriction was not being
enforced correctly. (Bug#23345)
Duplicate entries were not assessed correctly in a
MEMORY table with a
BTREE primary key on a
utf8ENUM column. (Bug#24985)
For MyISAM tables,
COUNT(*) could return an incorrect value if
the WHERE clause compared an indexed
TEXT column to the empty string
(''). This happened if the column contained
empty strings and also strings starting with control
characters such as tab or newline. (Bug#26231)
For DELETE FROM tbl_name ORDER BY
col_name (with no
WHERE or LIMIT clause),
the server did not check whether
col_name was a valid column in the
table. (Bug#26186)
ALTER VIEW requires the CREATE
VIEW and DROP privileges for the
view. However, if the view was created by another user, the
server erroneously required the SUPER
privilege. (Bug#26813)
In a view, a column that was defined using a
GEOMETRY function was treated as having the
LONGBLOB data type rather than the
GEOMETRY type. (Bug#27300)
With the NO_AUTO_VALUE_ON_ZERO SQL mode
enabled, LAST_INSERT_ID() could return 0
after INSERT ... ON DUPLICATE KEY UPDATE.
Additionally, the next rows inserted (by the same
INSERT, or the following
INSERT with or without ON
DUPLICATE KEY UPDATE), would insert 0 for the
auto-generated value if the value for the
AUTO_INCREMENT column was
NULL or missing. (Bug#23233)
For a stored procedure containing a SELECT
statement that used a complicated join with an
ON expression, the expression could be
ignored during re-execution of the procedure, yielding an
incorrect result. (Bug#20492)
When RAND() was called multiple times inside a stored
procedure, the server did not write the correct random seed
values to the binary log, resulting in incorrect replication.
(Bug#25543)
SOUNDEX() returned an invalid string for
international characters in multi-byte character sets. (Bug#22638)
Row equalities in WHERE clauses could cause
memory corruption. (Bug#27154)
GROUP BY on a ucs2
column caused a server crash when there was at least one empty
string in the column. (Bug#27079)
Evaluation of an IN() predicate containing
a decimal-valued argument caused a server crash. (Bug#27362)
Storing NULL values in spatial fields
caused excessive memory allocation and crashes on some
systems. (Bug#27164)
mysql_stmt_fetch() did an invalid memory
deallocation when used with the embedded server. (Bug#25492)
In a MEMORY table, using a
BTREE index to scan for updatable rows
could lead to an infinite loop. (Bug#26996)
The range optimizer could cause the server to run out of
memory. (Bug#26625)
The parser accepted illegal code in SQL exception handlers,
leading to a crash at runtime when executing the code. (Bug#26503)
Difficult repair or optimization operations could cause an
assertion failure, resulting in a server crash. (Bug#25289)
Increasing the width of a DECIMAL column
could cause column values to be changed. (Bug#24558)
Replication between master and slave would infinitely retry
binary log transmission where the
max_allowed_packet on the master was larger
than that on the slave if the size of the transfer was between
these two values. (Bug#23775)
Invalid optimization of pushdown conditions for queries where
an outer join was guaranteed to read only one row from the
outer table led to results with too few rows. (Bug#26963)
For INSERT ... ON DUPLICATE KEY UPDATE
statements on tables containing
AUTO_INCREMENT columns,
LAST_INSERT_ID() was reset to 0 if no rows
were successfully inserted or changed. “Not
changed” includes the case where a row was updated to
its current values, but in that case,
LAST_INSERT_ID() should not be reset to 0.
Now LAST_INSERT_ID() is reset to 0 only if
no rows were successfully inserted or touched, whether or not
touched rows were changed. (Bug#27033)
For an INSERT statement that should fail
due to a column with no default value not being assigned a
value, the statement succeeded with no error if the column was
assigned a value in an ON DUPLICATE KEY
UPDATE clause, even if that clause was not used.
(Bug#26261)
A result set column formed by concatention of string literals
was incomplete when the column was produced by a subquery in
the FROM clause. (Bug#26738)
When using the result of SEC_TO_TIME() for
time value greater than 24 hours in an ORDER
BY clause, either directly or through a column
alias, the rows were sorted incorrectly as strings. (Bug#26672)
If the server was started with
--skip-grant-tables, Selecting from
INFORMATION_SCHEMA tables causes a server
crash. (Bug#26285)
Incompatible change:
INSERT DELAYED statements are not supported
for MERGE tables, but the
MERGE storage engine was not rejecting such
statements, resulting in table corruption. Applications
previously using INSERT DELAYED into
MERGE table will break when upgrading to
versions with this fix. To avoid the problem, remove
DELAYED from such statements. (Bug#26464)
NDB Cluster: An invalid pointer was
returned following a FSCLOSECONF signal
when accessing the REDO logs during a node restart or system
restart. (Bug#26515)
NDB Cluster: An inadvertent use of
unaligned data caused ndb_restore to fail
on some 64-bit platforms, including Sparc and Itanium-2. (Bug#26739)
NDB Cluster: An infinite loop in an
internal logging function could cause trace logs to fill up
with Unknown Signal type error messages
and thus grow to unreasonable sizes. (Bug#26720)
NDB Cluster: The failure of a data node
when restarting it with --initial could lead
to failures of subsequent data node restarts. (Bug#26481)
NDB Cluster: Takeover for local
checkpointing due to multiple failures of master nodes was
sometimes incorrect handled. (Bug#26457)
NDB Cluster: The
LockPagesInMemory parameter was not read
until after distributed communication had already started
between cluster nodes. When the value of this parameter was
1, this could sometimes result in data node
failure due to missed heartbeats. (Bug#26454)
NDB Cluster: Under some circumstances,
following the restart of a management, all cluster data nodes
would connect to it normally, but some of them subsequently
failed to log any events to the management node. (Bug#26293)
NDB Cluster: An error was produced when
SHOW TABLE STATUS was used on an
NDB table that had no
AUTO_INCREMENT column. (Bug#21033)
SELECT ... INTO OUTFILE with a long
FIELDS ENCLOSED BY value could crash the
server. (Bug#27231)
DOUBLE values such as
20070202191048.000000 were being treated as
illegal arguments by WEEK(). (Bug#23616)
AFTER UPDATE triggers were not activated by
the update part of INSERT ... ON DUPLICATE KEY
UPDATE statements. (Bug#27006, Bug#27210)
For INSERT ... ON DUPLICATE KEY UPDATE
statements where some AUTO_INCREMENT values
were generated automatically for inserts and some rows were
updated, one auto-generated value was lost per updated row,
leading to faster exhaustion of the range of the
AUTO_INCREMENT column. (Bug#24432)
Because the original problem can affect replication (different
values on master and slave), it is recommended that the master
and its slaves be upgraded to the current version.
IN ((subquery)),
IN
(((subquery))), and so
forth, are equivalent to IN
(subquery), which is
always interpreted as a table subquery (so that it is allowed
to return more than one row). MySQL was treating the
“over-parenthesized” subquery as a single-row
subquery and rejecting it if it returned more than one row.
This bug primarily affected automatically generated code (such
as queries generated by Hibernate), because humans rarely
write the over-parenthesized forms. (Bug#21904)
For MERGE tables defined on underlying
tables that contained a short VARCHAR
column (shorter than four characters), using ALTER
TABLE on at least one but not all of the underlying
tables caused the table definitions to be considered different
from that of the MERGE table, even if the
ALTER TABLE did not change the definition.
(Bug#26881)
If a thread previously serviced a connection that was killed,
excessive memory and CPU use by the thread occurred if it
later serviced a connection that had to wait for a table lock.
(Bug#25966)
CURDATE() is less than
NOW(), either when comparing
CURDATE() directly (CURDATE() <
NOW() is true) or when casting
CURDATE() to DATE
(CAST(CURDATE() AS DATE) < NOW() is
true). However, storing CURDATE() in a
DATE column and comparing
col_name <
NOW() incorrectly yielded false. This is fixed by
comparing a DATE column as
DATETIME for comparisons to a
DATETIME constant. (Bug#21103)
A view on a join is insertable for INSERT
statements that store values into only one table of the join.
However, inserts were being rejected if the inserted-into
table was used in a self-join because MySQL incorrectly was
considering the insert to modify multiple tables of the view.
(Bug#25122)
Expressions involving SUM(), when used in
an ORDER BY clause, could lead to
out-of-order results. (Bug#25376)
LOAD DATA INFILE sent an okay to the client
before writing the binary log and committing the changes to
the table had finished, thus violating ACID requirements. (Bug#26050)
Views that used a scalar correlated subquery returned
incorrect results. (Bug#26560)
IF(expr,
unsigned_expr,
unsigned_expr) was evaluated to a
signed result, not unsigned. This has been corrected. The fix
also affects constructs of the form IS [NOT]
{TRUE|FALSE}, which were transformed internally into
IF() expressions that evaluated to a signed
result. (Bug#24532)
For existing views that were defined using IS [NOT]
{TRUE|FALSE} constructs, there is a related
implication. The definitions of such views were stored using
the IF() expression, not the original
construct. This is manifest in that SHOW CREATE
VIEW shows the transformed IF()
expression, not the original one. Existing views will evaluate
correctly after the fix, but if you want SHOW CREATE
VIEW to display the original construct, you must
drop the view and re-create it using its original definition.
New views will retain the construct in their definition.
BENCHMARK() did not work correctly for
expressions that produced a DECIMAL result.
(Bug#26093)
For some values of the position argument, the
INSERT() function could insert a NUL byte
into the result. (Bug#26281)
Inserting utf8 data into a
TEXT column that used a single-byte
character set could result in spurious warnings about
truncated data. (Bug#25815)
EXPLAIN EXTENDED did not show
WHERE conditions that were optimized away.
(Bug#22331)
INSERT DELAYED statements inserted
incorrect values into BIT columns. (Bug#26238)
For expr
IN(value_list), the
result could be incorrect if BIGINT
UNSIGNED values were used for
expr or in the value list. (Bug#19342)
When a TIME_FORMAT() expression was used as
a column in a GROUP BY clause, the
expression result was truncated. (Bug#20293)
For SUBSTRING() evaluation using a
temporary table, when SUBSTRING() was used
on a LONGTEXT column, the max_length
metadata value of the result was incorrectly calculated and
set to 0. Consequently, an empty string was returned instead
of the correct result. (Bug#15757)
Use of a GROUP BY clause that referred to a
stored function result together with WITH
ROLLUP caused incorrect results. (Bug#25373)
Use of a subquery containing GROUP BY and
WITH ROLLUP caused a server crash. (Bug#26830)
Use of a subquery containing a UNION with
an invalid ORDER BY clause caused a server
crash. (Bug#26661)
In certain cases it could happen that deleting a row corrupted
an RTREE index. This affected indexes on
spatial columns. (Bug#25673)
Added support for --debugger=dbx for
mysql-test-run.pl and fixed support for
--debugger=devenv,
--debugger=DevEnv, and
--debugger=/path/to/devenv.
(Bug#26792)
X() IS NULL and Y() IS
NULL comparisons failed when X()
and Y() returned NULL.
(Bug#26038)
UNHEX() IS NULL comparisons failed when
UNHEX() returned NULL.
(Bug#26537)
The REPEAT() function did not allow a
column name as the count parameter.
(Bug#25197)
On 64-bit Windows, large timestamp values could be handled
incorrectly. (Bug#26536)
In some error messages, inconsistent format specifiers were
used for the translations in different languages.
comp_err (the error message compiler) now
checks for mismatches. (Bug#26571)
On Windows, the server exhibited a file-handle leak after
reaching the limit on the number of open file descriptors.
(Bug#25222)
A reference to a non-existent column in the ORDER
BY clause of an UPDATE ... ORDER
BY statement could cause a server crash. (Bug#25126)
A multiple-row delayed insert with an auto increment column
could cause duplicate entries to be created on the slave in a
replication environment. (Bug#25507, Bug#26116)
Duplicating the usage of a user variable in a stored procedure
or trigger would not be replicated correctly to the slave.
(Bug#25167)
User defined variables used within stored procedures and
triggers are not replicated correctly when operating in
statement-based replication mode. (Bug#20141, Bug#14914)
Loading data using LOAD DATA INFILE may not
replicate correctly (due to character set incompatibilities)
if the character_set_database variable is
set before the data is loaded. (Bug#15126)
DROP TRIGGER statements would not be
filtered on the slave when using the
replication-wild-do-table option. (Bug#24478)
MySQL would not compile when configured using
--without-query-cache. (Bug#25075)
When using certain server SQL modes, the
mysql.proc table was not created by
mysql_install_db. In addition, the creation
of this and other MySQL system tables was not checked for by
mysql-test-run.pl. (Bug#23669, Bug#20166)
VIEW restrictions were applied to
SELECT statements after a CREATE
VIEW statement failed, as though the
CREATE had succeeded. (Bug#25897)
An INSERT trigger invoking a stored routine
that inserted into a table other than the one on which the
trigger was defined would fail with a Table '...'
doesn't exist referring to the second table when
attempting to delete records from the first table. (Bug#21825)
A stored procedure that made use of cursors failed when the
procedure was invoked from a stored function. (Bug#25345)
When nesting stored procedures within a trigger on a table, a
false dependency error was thrown when one of the nested
procedures contained a DROP TABLE
statement. (Bug#22580)
When attempting to call a stored procedure creating a table
from a trigger on a table tbl in a database
db, the trigger failed with
ERROR 1146 (42S02): Table 'db.tbl' doesn't
exist. However, the actual reason that such a
trigger fails is due to the fact that CREATE
TABLE causes an implicit COMMIT,
and so a trigger cannot invoke a stored routine containing
this statement. A trigger which does so now fails with
ERROR 1422 (HY000): Explicit or implicit commit is
not allowed in stored function or trigger, which
makes clear the reason for the trigger's failure. (Bug#18914)
Local variables in stored routines or triggers, when declared
as the BIT type, were interpreted as
strings. (Bug#12976)
When a stored routine attempted to execute a statement
accessing a nonexistent table, the error was not caught by the
routine's exception handler. (Bug#8407, Bug#20713)
NOW() returned the wrong value in
statements executed at server startup with the
--init-file option. (Bug#23240)
Instance Manager did not remove the angel PID file on a clean
shutdown. (Bug#22511)
The server could crash if two or more threads initiated query
cache resize operation at moments very close in time. (Bug#23527)
The conditions checked by the optimizer to allow use of
indexes in IN predicate calculations were
unnecessarily tight and were relaxed. (Bug#20420)
Several deficiencies in resolution of column names for
INSERT ... SELECT statements were
corrected. (Bug#25831)
Indexes on TEXT columns were ignored when
ref accesses were evaluated. (Bug#25971)
The update columns for INSERT ... SELECT ... ON
DUPLICATE KEY UPDATE could be assigned incorrect
values if a temporary table was used to evaluate the
SELECT. (Bug#16630)
CONNECTION is no longer treated as a
reserved word. (Bug#12204)
A user-defined variable could be assigned an incorrect value
if a temporary table was employed in obtaining the result of
the query used to determine its value. (Bug#24010)
Queries that used a temporary table for the outer query when
evaluating a correlated subquery could return incorrect
results. (Bug#23800)
For index reads, the BLACKHOLE engine did
not return end-of-file (which it must because
BLACKHOLE tables contain no rows), causing
some queries to crash. (Bug#19717)
D.1.2. Release Notes for MySQL Community Server 5.0.37 (27 February 2007)
This is a bugfix release for the current production release
family. It replaces MySQL 5.0.33.
Functionality added or changed:
This is the last version for which MySQL-Max RPM distributions
are available. (This change was already made for non-RPM
binary distributions in 5.0.27.)
Added the Uptime_since_flush_status status
variable, which indicates the number of seconds since the most
recent FLUSH STATUS statement. (From Jeremy
Cole) (Bug#24822)
Incompatible change:
Previously, the DATE_FORMAT() function
returned a binary string. Now it returns a string with a
character set and collation given by
character_set_connection and
collation_connection so that it can return
month and weekday names containing non-ASCII characters. (Bug#22646)
NDB Cluster: The
LockPagesInMainMemory configuration
parameter has changed its type and possible values. For more
information, see
LockPagesInMainMemory.
(Bug#25686)
Important: The values
true and false are no
longer accepted for this parameter. If you were using this
parameter and had it set to false in a
previous release, you must change it to 0.
If you had this parameter set to true, you
should instead use 1 to obtain the same
behavior as previously, or 2 to take
advantage of new functionality introduced with this release
described in the section cited above.
Important: When using
MERGE tables the definition of the
MERGE table and the
MyISAM tables are checked each time the
tables are opened for access (including any
SELECT or INSERT
statement. Each table is compared for column order, types,
sizes and associated. If there is a difference in any one of
the tables then the statement will fail.
The localhost anonymous user account
created during MySQL installation on Windows now has no global
privileges. Formerly this account had all global privileges.
For operations that require global privileges, the
root account can be used instead. (Bug#24496)
The bundled yaSSL library was upgraded to version 1.5.8.
The --skip-thread-priority option now is
enabled by default for binary Mac OS X distributions. Use of
thread priorities degrades performance on Mac OS X. (Bug#18526)
Added the --disable-grant-options option to
configure. If configure
is run with this option, the --bootstrap,
--skip-grant-tables, and
--init-file options for
mysqld are disabled and cannot be used. For
Windows, the configure.js script recognizes
the DISABLE_GRANT_OPTIONS flag, which has
the same effect.
Bugs fixed:
Incompatible change: For
ENUM columns that had enumeration values
containing commas, the commas were mapped to 0xff internally.
However, this rendered the commas indistinguishable from true
0xff characters in the values. This no longer occurs. However,
the fix requires that you dump and reload any tables that have
ENUM columns containing true 0xff in their
values: Dump the tables using mysqldump
with the current server before upgrading from a version of
MySQL 5.0 older than 5.0.36 to version 5.0.36 or newer. (Bug#24660)
On Windows, if the server was installed as a service, it did
not auto-detect the location of the data directory. (Bug#20376)
If the duplicate key value was present in the table,
INSERT ... ON DUPLICATE KEY UPDATE reported
a row count indicating that a record was updated, even when no
record actually changed due to the old and new values being
the same. Now it reports a row count of zero. (Bug#19978)
Some UPDATE statements were slower than in
previous versions when the search key could not be converted
to a valid value for the type of the search column. (Bug#24035)
The WITH CHECK OPTION clause for views was
ignored for updates of multiple-table views when the updates
could not be performed on fly and the rows to update had to be
put into temporary tables first. (Bug#25931)
Using ORDER BY or GROUP
BY could yield different results when selecting from
a view and selecting from the underlying table. (Bug#26209)
LAST_INSERT_ID() was not reset to 0 if
INSERT ... SELECT inserted no rows. (Bug#23170)
Storing values specified as hexadecimal values 64 or more bits
long into BIT(64),
BIGINT, or BIGINT
UNSIGNED columns did not raise any warning or error
if the value was out of range. (Bug#22533)
Inserting DEFAULT into a column with no
default value could result in garbage in the column. Now the
same result occurs as when inserting NULL
into a NOT NULL column. (Bug#20691)
The presence of ORDER BY in a view
definition prevented the MERGE algorithm
from being used to resolve the view even if nothing else in
the definition required the TEMPTABLE
algorithm. (Bug#12122)
ISNULL(DATE(NULL)) and
ISNULL(CAST(NULL AS DATE)) erroneously
returned false. (Bug#23938)
If a slave server closed its relay log (for example, due to an
error during log rotation), the I/O thread did not recognize
this and still tried to write to the log, causing a server
crash. (Bug#10798)
Using an INFORMATION_SCHEMA table with
ORDER BY in a subquery could cause a server
crash. (Bug#24630, Bug#26556)
Collation for LEFT JOIN comparisons could
be evaluated incorrectly, leading to improper query results.
(Bug#26017)
For the IF() and
COALESCE() function and
CASE expressions, large unsigned integer
values could be mishandled and result in warnings. (Bug#22026)
The number of setsockopt() calls performed
for reads and writes to the network socket was reduced to
decrease system call overhead. (Bug#22943)
A WHERE clause that used
BETWEEN for DATETIME
values could be treated differently for a
SELECT and a view defined as that
SELECT. (Bug#26124)
ORDER BY on DOUBLE
values could change the set of rows returned by a query. (Bug#19690)
The code for generating USE statements for
binary logging of CREATE PROCEDURE
statements resulted in confusing output from
mysqlbinlog for DROP
PROCEDURE statements. (Bug#22043)
LOAD DATA INFILE did not work with pipes.
(Bug#25807)
DISTINCT queries that were executed using a
loose scan for an InnoDB table that had
been emptied caused a server crash. (Bug#26159)
The InnoDB parser sometimes did not account
for null bytes, causing spurious failure of some queries. (Bug#25596)
Type conversion errors during formation of index search
conditions were not correctly checked, leading to incorrect
query results. (Bug#22344)
Within a stored routine, accessing a declared routine variable
with PROCEDURE ANALYSE() caused a server
crash. (Bug#23782)
Use of already freed memory caused SSL connections to hang
forever. (Bug#19209)
mysql.server stop timed out too quickly (35
seconds) waiting for the server to exit. Now it waits up to 15
minutes, to ensure that the server exits. (Bug#25341)
A yaSSL program named test was installed,
causing conflicts with the test system
utility. It is no longer installed. (Bug#25417)
perror crashed on some platforms due to
failure to handle a NULL pointer. (Bug#25344)
mysql_stmt_fetch() did an invalid memory
deallocation when used with the embedded server. (Bug#25492)
mysql_kill() caused a server crash when
used on an SSL connection. (Bug#25203)
The readline library wrote to uninitialized
memory, causing mysql to crash. (Bug#19474)
yaSSL was sensitive to the presence of whitespace at the ends
of lines in PEM-encoded certificates, causing a server crash.
(Bug#25189)
mysqld_multi and
mysqlaccess looked for option files in
/etc even if the
--sysconfdir option for
configure had been given to specify a
different directory. (Bug#24780)
The SEC_TO_TIME() and
QUARTER() functions sometimes did not
handle NULL values correctly. (Bug#25643)
With ONLY_FULL_GROUP_BY enables, the server
was too strict: Some expressions involving only aggregate
values were rejected as non-aggregate (for example,
MAX(a) - MIN(a)). (Bug#23417)
The arguments of the ENCODE() and the
DECODE() functions were not printed
correctly, causing problems in the output of EXPLAIN
EXTENDED and in view definitions. (Bug#23409)
An error in the name resolution of nested JOIN ...
USING constructs was corrected. (Bug#25575)
A return value of -1 from user-defined
handlers was not handled well and could result in conflicts
with server code. (Bug#24987)
The server might fail to use an appropriate index for
DELETE when ORDER BY,
LIMIT, and a non-restricting
WHERE are present. (Bug#17711)
Use of ON DUPLICATE KEY UPDATE defeated the
usual restriction against inserting into a join-based view
unless only one of the underlying tables is used. (Bug#25123)
Some queries against INFORMATION_SCHEMA
that used subqueries failed. (Bug#23299).
SHOW COLUMNS reported some NOT
NULL columns as NULL. (Bug#22377)
View definitions that used the ! operator
were treated as containing the NOT
operator, which has a different precedence and can produce
different results. (Bug#25580).
For a UNIQUE index containing many
NULL values, the optimizer would prefer the
index for col IS
NULL conditions over other more selective indexes.
(Bug#25407).
GROUP BY and DISTINCT
did not group NULL values for columns that
have a UNIQUE index. (Bug#25551).
ALTER TABLE ... ENABLE KEYS acquired a
global lock, preventing concurrent execution of other
statements that use tables. (Bug#25044).
For an InnoDB table with any ON
DELETE trigger, TRUNCATE TABLE
mapped to DELETE and activated triggers.
Now a fast truncation occurs and triggers are not activated.
(Bug#23556).
For ALTER TABLE, using ORDER BY
expression could cause a
server crash. Now the ORDER BY clause
allows only column names to be specified as sort criteria
(which was the only documented syntax, anyway). (Bug#24562)
readline detection did not work correctly
on NetBSD. (Bug#23293)
The --with-readline option for
configure does not work for commercial
source packages, but no error message was printed to that
effect. Now a message is printed. (Bug#25530)
If an ORDER BY or GROUP
BY list included a constant expression being
optimized away and, at the same time, containing single-row
subselects that return more that one row, no error was
reported. If a query requires sorting by expressions
containing single-row subselects that return more than one
row, execution of the query may cause a server crash. (Bug#24653)
Attempts to access a MyISAM table with a
corrupt column definition caused a server crash. (Bug#24401)
To enable installation of MySQL RPMs on Linux systems running
RHEL 4 (which includes SE-Linux) additional information was
provided to specify some actions that are allowed to the MySQL
binaries. (Bug#12676)
When SET PASSWORD was written to the binary
log double quotes were included in the statement. If the slave
was running in with the sql_mode set to
ANSI_QUOTES the event would fail and halt
the replication process. (Bug#24158)
Accessing a fixed record format table with a crashed key
definition results in server/myisamchk
segmentation fault. (Bug#24855)
When opening a corrupted .frm file during
a query, the server crashes. (Bug#24358)
If there was insufficient memory to store or update a blob
record in a MyISAM table then the table
will marked as crashed. (Bug#23196)
When updating a table that used a JOIN of
the table itself (for example, when building trees) and the
table was modified on one side of the expression, the table
would either be reported as crashed or the wrong rows in the
table would be updated. (Bug#21310)
Queries that evaluate NULL IN (SELECT ... UNION
SELECT ...) could produce an incorrect result
(FALSE instead of NULL).
(Bug#24085)
When reading from the standard input on Windows,
mysqlbinlog opened the input in text mode
rather than binary mode and consequently misinterpreted some
characters such as Control-Z. (Bug#23735)
Within stored routines or prepared statements, inconsistent
results occurred with multiple use of INSERT ...
SELECT ... ON DUPLICATE KEY UPDATE when the
ON DUPLICATE KEY UPDATE clause erroneously
tried to assign a value to a column mentioned only in its
SELECT part. (Bug#24491)
Expressions of the form (a, b) IN (SELECT a, MIN(b)
FROM t GROUP BY a) could produce incorrect results
when column a of table t
contained NULL values while column
b did not. (Bug#24420)
Expressions of the form (a, b) IN (SELECT c, d
...) could produce incorrect results if
a, b, or both were
NULL. (Bug#24127)
No warning was issued for use of the DATA
DIRECTORY or INDEX DIRECTORY
table options on a platform that does not support them. (Bug#17498)
When a prepared statement failed during the prepare operation,
the error code was not cleared when it was reused, even if the
subsequent use was successful. (Bug#15518)
mysql_upgrade failed when called with a
basedir pathname containing spaces. (Bug#22801)
Hebrew-to-Unicode conversion failed for some characters.
Definitions for the following Hebrew characters (as specified
by the ISO/IEC 8859-8:1999) were added: LEFT-TO-RIGHT MARK
(LRM), RIGHT-TO-LEFT MARK (RLM) (Bug#24037)
An AFTER UPDATE trigger on an
InnoDB table with a composite primary key
caused the server to crash. (Bug#25398)
A query that contained an EXIST subquery
with a UNION over correlated and
uncorrelated SELECT queries could cause the
server to crash. (Bug#25219)
A query with ORDER BY and GROUP
BY clauses where the ORDER BY
clause had more elements than the GROUP BY
clause caused a memory overrun leading to a crash of the
server. (Bug#25172)
If there was insufficient memory available to
mysqld, this could sometimes cause the
server to hang during startup. (Bug#24751)
If a prepared statement accessed a view, access to the tables
listed in the query after that view was checked in the
security context of the view. (Bug#24404)
A query using WHERE
unsigned_column NOT IN
('negative_value') could
cause the server to crash. (Bug#24261)
A FETCH statement using a cursor on a table
which was not in the table cache could sometimes cause the
server to crash. (Bug#24117)
SSL connections could hang at connection shutdown. (Bug#24148)
The STDDEV() function returned a positive
value for data sets consisting of a single value. (Bug#22555)
mysqltest incorrectly tried to retrieve
result sets for some queries where no result set was
available. (Bug#19410)
mysqltest crashed with a stack overflow.
(Bug#24498)
Passing a NULL value to a user-defined
function from within a stored procedure crashes the server.
(Bug#25382)
The row count for MyISAM tables was not
updated properly, causing SHOW TABLE STATUS
to report incorrect values. (Bug#23526)
The BUILD/check-cpu script did not
recognize Celeron processors. (Bug#20061)
On Windows, the SLEEP() function could
sleep too long, especially after a change to the system clock.
(Bug#14094, Bug#17635, Bug#24686)
A stored routine containing semicolon in its body could not be
reloaded from a dump of a binary log. (Bug#20396)
For SET, SELECT, and
DO statements that invoked a stored
function from a database other than the default database, the
function invocation could fail to be replicated. (Bug#19725)
SET lc_time_names =
value allowed only exact
literal values, not expression values. (Bug#22647)
Changes to the lc_time_names system
variable were not replicated. (Bug#22645)
SELECT ... FOR UPDATE, SELECT ...
LOCK IN SHARE MODE, DELETE, and
UPDATE statements executed using a full
table scan were not releasing locks on rows that did not
satisfy the WHERE condition. (Bug#20390)
A stored procedure, executed from a connection using a binary
character set, and which wrote multibyte data, would write
incorrectly escaped entries to the binary log. This caused
syntax errors, and caused replication to fail. (Bug#23619,
Bug#24492)
mysqldump --order-by-primary failed if the
primary key name was an identifier that required quoting. (Bug#13926)
Re-execution of CREATE DATABASE,
CREATE TABLE, and ALTER
TABLE statements in stored routines or as prepared
statements caused incorrect results or crashes. (Bug#22060)
The internal functions for table preparation, creation, and
alteration were not re-execution friendly, causing problems in
code that: repeatedly altered a table; repeatedly created and
dropped a table; opened and closed a cursor on a table,
altered the table, and then reopened the cursor. (Bug#4968,
Bug#6895, Bug#19182, Bug#19733)
A workaround was implemented to avoid a race condition in the
NPTL pthread_exit() implementation. (Bug#24507)
NDB Cluster (Cluster APIs):
libndbclient.so was not versioned. (Bug#13522)
NDB Cluster: The
ndb_size.tmpl file (necessary for using
the ndb_size.pl script) was missing from
binary distributions. (Bug#24191)
NDB Cluster: A query with an
IN clause against an NDB
table employing explicit user-defined partitioning did not
always return all matching rows. (Bug#25821)
NDB Cluster: An UPDATE
using an IN clause on an
NDB table on which there was a trigger
caused mysqld to crash. (Bug#25522)
NDB Cluster (Cluster APIs): Deletion of an
Ndb_cluster_connection object took a very
long time. (Bug#25487)
NDB Cluster: It was not possible to create
an NDB table with a key on two
VARCHAR columns where both columns had a
storage length in excess of 256. (Bug#25746)
NDB Cluster: In some circumstances,
shutting down the cluster could cause connected
mysqld processes to crash. (Bug#25668)
NDB Cluster: Memory allocations for
TEXT columns were calculated incorrectly,
resulting in space being wasted and other issues. (Bug#25562)
NDB Cluster: The failure of a master node
during a node restart could lead to a resource leak, causing
later node failures. (Bug#25554)
NDB Cluster: The management server did not
handle logging of node shutdown events correctly in certain
cases. (Bug#22013)
NDB Cluster: A node shutdown occurred if
the master failed during a commit. (Bug#25364)
NDB Cluster: Creating a non-unique index
with the USING HASH clause silently created
an ordered index instead of issuing a warning. (Bug#24820)
NDB Cluster: SELECT
statements with a BLOB or
TEXT column in the selected column list and
a WHERE condition including a primary key
lookup on a VARCHAR primary key produced
empty result sets. (Bug#19956)
Optimizations that are legal only for subqueries without
tables and WHERE conditions were applied
for any subquery without tables. (Bug#24670)
The server was built even when configure
was run with the --without-server option.
(Bug#23973)
mysqld_error.h was not installed when
only the client libraries were built. (Bug#21265)
Using a view in combination with a USING
clause caused column aliases to be ignored. (Bug#25106)
A view was not handled correctly if the
SELECT part contained
‘\Z’. (Bug#24293)
Inserting a row into a table without specifying a value for a
BINARY(N) NOT
NULL column caused the column to be set to spaces,
not zeroes. (Bug#14171)
An assertion failed incorrectly for prepared statements that
contained a single-row uncorrelated subquery that was used as
an argument of the IS NULL predicate. (Bug#25027)
A table created with the ROW_FORMAT = FIXED
table option loses the option if an index is added or dropped
with CREATE INDEX or DROP
INDEX. (Bug#23404)
Dropping a user-defined function sometimes did not remove the
UDF entry from the mysql.proc table. (Bug#15439)
Changing the value of MI_KEY_BLOCK_LENGTH
in myisam.h and recompiling MySQL
resulted in a myisamchk that saw existing
MyISAM tables as corrupt. (Bug#22119)
Instance Manager could crash during shutdown. (Bug#19044)
A deadlock could occur, with the server hanging on
Closing tables, with a sufficient number of
concurrent INSERT DELAYED, FLUSH
TABLES, and ALTER TABLE
operations. (Bug#23312)
A user-defined variable could be assigned an incorrect value
if a temporary table was employed in obtaining the result of
the query used to determine its value. (Bug#16861)
The optimizer removes expressions from GROUP
BY and DISTINCT clauses if they
happen to participate in
expression =
constant predicates of
the WHERE clause, the idea being that, if
the expression is equal to a constant, then it cannot take on
multiple values. However, for predicates where the expression
and the constant item are of different result types (for
example, when a string column is compared to 0), this is not
valid, and can lead to invalid results in such cases. The
optimizer now performs an additional check of the result types
of the expression and the constant; if their types differ,
then the expression is not removed from the GROUP
BY list. (Bug#15881)
Referencing an ambiguous column alias in an expression in the
ORDER BY clause of a query caused the
server to crash. (Bug#25427)
Some CASE statements inside stored routines
could lead to excessive resource usage or a crash of the
server. (Bug#24854, Bug#19194)
Some joins in which one of the joined tables was a view could
return erroneous results or crash the server. (Bug#24345)
User-defined variables could consume excess memory, leading to
a crash caused by the exhaustion of resources available to the
MEMORY storage engine, due to the fact that
this engine is used by MySQL for variable storage and
intermediate results of GROUP BY queries.
Where SET had been used, such a condition
could instead give rise to the misleading error message
You may only use constant expressions with
SET, rather than Out of memory (Needed
NNNNNN bytes). (Bug#23443)
InnoDB: During a restart of the MySQL
Server that followed the creation of a temporary table using
the InnoDB storage engine, MySQL failed to
clean up in such a way that InnoDB still
attempted to find the files associated with such tables. (Bug#20867)
A multiple-table DELETE QUICK could
sometimes cause one of the affected tables to become
corrupted. (Bug#25048)
A compressed MyISAM table that became
corrupted could crash myisamchk and
possibly the MySQL Server. (Bug#23139)
A crash of the MySQL Server could occur when unpacking a
BLOB column from a row in a corrupted
MyISAM table. This could happen when trying to repair a table
using either REPAIR TABLE or
myisamchk; it could also happen when trying
to access such a “broken” row using statements
like SELECT if the table was not marked as
crashed. (Bug#22053)
The FEDERATED storage engine did not
support the euckr character set. (Bug#21556)
The FEDERATED storage engine did not
support the utf8 character set. (Bug#17044)
NDB Cluster: Hosts in clusters with a large
number of nodes could experience excessive CPU usage while
obtaining configuration data. (Bug#25711)
NDB Cluster (NDB API): Invoking the
NdbTransaction::execute() method using
execution type Commit and abort option
AO_IgnoreError could lead to a crash of the
transaction coordinator (DBTC). (Bug#25090)
NDB Cluster (NDB API): A unique index
lookup on a non-existent tuple could lead to a data node
timeout (error 4012). (Bug#25059)
NDB Cluster: When a data node was shut down
using the management client STOP command, a
connection event (NDB_LE_Connected) was
logged instead of a disconnection event
(NDB_LE_Disconnected). (Bug#22773)
D.1.3. Release Notes for MySQL Community Server 5.0.33 (09 January 2007)
This is a bugfix release for the current production release
family. It replaces MySQL 5.0.27.
Note
This version of MySQL Community Server has been released as a
source tarball only; there are no binaries built by MySQL.
Functionality added or changed:
Incompatible change: The
prepared_stmt_count system variable has
been converted to the Prepared_stmt_count
global status variable (viewable with the SHOW GLOBAL
STATUS statement). (Bug#23159)
NDB Cluster: Setting the configuration
parameter LockPagesInMainMemory had no
effect. (Bug#24461)
NDB Cluster: It is now possible to create a
unique hashed index on a column that is not defined as
NOT NULL. Note that this change
applies only to tables using the NDB
storage engine.
Unique indexes on columns in NDB tables do
not store null values because they are mapped to primary keys
in an internal index table (and primary keys cannot contain
nulls).
Normally, an additional ordered index is created when one
creates unique indexes on NDB table
columns; this can be used to search for
NULL values. However, if USING
HASH is specified when such an index is created, no
ordered index is created.
The reason for permitting unique hash indexes with null values
is that, in some cases, the user wants to save space if a
large number of records are pre-allocated but not fully
initialized. This also assumes that the user will
not try to search for null values. Since
MySQL does not support indexes that are not allowed to be
searched in some cases, the NDB storage
engine uses a full table scan with pushed conditions for the
referenced index columns to return the correct result.
Note that a warning is returned if one creates a unique
nullable hash index, since the query optimizer should be
provided a hint not to use it with NULL
values if this can be avoided.
In MySQL 5.0.13 and up, InnoDB rolls back
only the last statement on a transaction timeout. A new
option, --innodb_rollback_on_timeout, causes
InnoDB to abort and roll back the entire
transaction if a transaction timeout occurs (the same behavior
as before MySQL 5.0.13). (Bug#24200)
DROP TRIGGER now supports an IF
EXISTS clause. (Bug#23703)
The Com_create_user status variable was
added (for counting CREATE USER
statements). (Bug#22958)
The --memlock option relies on system calls
that are unreliable on some operating systems. If a crash
occurs, the server now checks whether
--memlock was specified and if so issues some
information about possible workarounds. (Bug#22860)
The bundled yaSSL library was upgraded to version 1.5.0.
In MySQL 5.0.13 and up, InnoDB rolls back
only the last statement on a transaction timeout. A new
option, --innodb_rollback_on_timeout, causes
InnoDB to abort and roll back the entire
transaction if a transaction timeout occurs (the same behavior
as before MySQL 5.0.13). (Bug#24200)
If the user specified the server options
--max-connections=N
or
--table-open-cache=M,
a warning would be given in some cases that some values were
recalculated, with the result that
--table-open-cache could be assigned greater
value.
It should be noted that, in such cases, both the warning and
the increase in the --table-open-cache value
were completely harmless. Note also that it is not possible
for the MySQL Server to predict or to control limitations on
the maximum number of open files, since this is determined by
the operating system.
The recalculation code has now been fixed to ensure that the
value of --table-open-cache is no longer
increased automatically, and that a warning is now given only
if some values had to be decreased due to operating system
limits.
NDB Cluster: The HELP
command in the Cluster management client now provides
command-specific help. For example, HELP
RESTART in ndb_mgm provides
detailed information about the START
command. (Bug#19620)
NDB Cluster: Added the --bind-address
option for ndbd. This allows a data node
process to be bound to a specific network interface. (Bug#22195)
NDB Cluster: The
Ndb_number_of_storage_nodes system variable
was renamed to Ndb_number_of_data_nodes.
(Bug#20848)
NDB Cluster: The
ndb_config utility now accepts
-c as a short form of the
--ndb-connectstring option. (Bug#22295)
SHOW STATUS is no longer logged to the slow
query log. (Bug#19764)
mysqldump --single-transaction now uses
START TRANSACTION /*!40100 WITH CONSISTENT SNAPSHOT
*/ rather than BEGIN to start a
transaction, so that a consistent snapshot will be used on
those servers that support it. (Bug#19660)
mysql_upgrade now passes all the parameters
specified on the command line to both
mysqlcheck and mysql
using the upgrade_defaults file. (Bug#20100)
For the CALL statement, stored procedures
that take no arguments now can be invoked without parentheses.
That is, CALL p() and CALL
p are equivalent. (Bug#21462)
Bugs fixed:
NDB Cluster: Sudden disconnection of an SQL
or data node could lead to shutdown of data nodes with the
error failed ndbrequire. (Bug#24447)
NDB Cluster: ndb_config
failed when trying to use 2 management servers and node IDs.
(Bug#23887)
NDB Cluster (Cluster APIs): Using
BIT values with any of the comparison
methods of the NdbScanFilter class caused
the cluster's data nodes to fail. (Bug#24503)
NDB Cluster: The failure of a data node
failure during a schema operation could lead to additional
node failures. (Bug#24752)
NDB Cluster: A committed read could be
attempted before a data node had time to connect, causing a
timeout error. (Bug#24717)
NDB Cluster (Cluster APIs): Some MGM API
function calls could yield incorrect return values in certain
cases where the cluster was operating under a very high load,
or experienced timeouts in inter-node communications. (Bug#24011)
NDB Cluster: A unique constraint violation
was not ignored by an UPDATE IGNORE
statement when the constraint violation occurred on a
non-primary key. (Bug#18487, Bug#24303)
mysql_fix_privilege_tables did not handle a
password containing embedded space or apostrophe characters.
(Bug#17700)
Foreign key identifiers for InnoDB tables
could not contain certain characters. (Bug#24299)
In some cases, the parser failed to distinguish a user-defined
function from a stored function. (Bug#21809)
With innodb_file_per_table enabled,
InnoDB displayed incorrect file times in
the output from SHOW TABLE STATUS. (Bug#24712)
The stack size for NetWare binaries was increased to 128KB to
prevent problems caused by insufficient stack size. (Bug#23504)
Attempting to use a view containing DEFINER
information for a non-existent user resulted in an error
message that revealed the definer account. Now the definer is
revealed only to superusers. Other users receive only an
access denied message. (Bug#17254)
mysql_upgrade failed if the
--password (or -p) option
was given. (Bug#24896)
For a nonexistent table, DROP TEMPORARY
TABLE failed with an incorrect error message if
read_only was enabled. (Bug#22077)
The code for generating USE statements for
binary logging of CREATE PROCEDURE
statements resulted in confusing output from
mysqlbinlog for DROP
PROCEDURE statements. (Bug#22043)
The InnoDB mutex structure was simplified
to reduce memory load. (Bug#24386)
The REPEAT() function could return
NULL when passed a column for the count
argument. (Bug#24947)
Accuracy was improved for comparisons between
DECIMAL columns and numbers represented as
strings. (Bug#23260)
InnoDB crashed while performing XA recovery
of prepared transactions. (Bug#21468)
ROW_COUNT() did not work properly as an
argument to a stored procedure. (Bug#23760)
The size of MEMORY tables and internal
temporary tables was limited to 4GB on 64-bit Windows systems.
(Bug#24052)
For queries that select from a view, the server was returning
MYSQL_FIELD metadata inconsistently for
view names and table names. For view columns, the server now
returns the view name in the table field
and, if the column selects from an underlying table, the table
name in the org_table field. (Bug#20191)
It was possible to use DATETIME values
whose year, month, and day parts were all zeroes but whose
hour, minute, and second parts contained nonzero values, an
example of such an illegal DATETIME being
'0000-00-00 11:23:45'. (Bug#21789)
It was possible to set the backslash character
(“\”) as the delimiter
character using DELIMITER, but not actually
possible to use it as the delimiter. (Bug#21412)
The loose index scan optimization for GROUP
BY with MIN or
MAX was not applied within other queries,
such as CREATE TABLE ... SELECT ...,
INSERT ... SELECT ..., or in the
FROM clauses of subqueries. (Bug#24156)
ALTER ENABLE KEYS or ALTER TABLE
DISABLE KEYS combined with another ALTER
TABLE option other than RENAME TO
did nothing. In addition, if ALTER TABLE was used on a table
having disabled keys, the keys of the resulting table were
enabled. (Bug#24395)
Queries using a column alias in an expression as part of an
ORDER BY clause failed, an example of such
a query being SELECT mycol + 1 AS mynum FROM mytable
ORDER BY 30 - mynum. (Bug#22457)
Trailing spaces were not removed from Unicode
CHAR column values when used in indexes.
This resulted in excessive usage of storage space, and could
affect the results of some ORDER BY queries
that made use of such indexes.
Note: When upgrading, it is
necessary to re-create any existing indexes on Unicode
CHAR columns in order to take advantage of
the fix. This can be done by using a REPAIR
TABLE statement on each affected table.
Warnings were generated when explicitly casting a character to
a number (for example, CAST('x' AS
SIGNED)), but not for implicit conversions in simple
arithmetic operations (such as 'x' + 0).
Now warnings are generated in all cases. (Bug#11927)
STR_TO_DATE() returned
NULL if the format string contained a space
following a non-format character. (Bug#22029)
yaSSL crashed on pre-Pentium Intel CPUs. (Bug#21765)
Selecting into variables sometimes returned incorrect wrong
results. (Bug#20836)
Inserting DEFAULT into a column with no
default value could result in garbage in the column. Now the
same result occurs as when inserting NULL
into a NOT NULL column. (Bug#20691)
mysql_fix_privilege_tables.sql altered
the table_privs.table_priv column to
contain too few privileges, causing loss of the
CREATE VIEW and SHOW
VIEW privileges. (Bug#20589)
A query with a subquery that references columns of a view from
the outer SELECT could return an incorrect
result if used from a prepared statement. (Bug#20327)
A server crash occurred when using LOAD
DATA to load a table containing a NOT
NULL spatial column, when the statement did not load
the spatial column. Now a NULL supplied to NOT NULL
column error occurs. (Bug#22372)
Unsigned BIGINT values treated as signed
values by the MOD() function. (Bug#19955)
Compiling PHP 5.1 with the MySQL static libraries failed on
some versions of Linux. (Bug#19817)
The DELIMITER statement did not work
correctly when used in an SQL file run using the
SOURCE statement. (Bug#19799)
VARBINARY column values inserted on a MySQL
4.1 server had trailing zeroes following upgrade to MySQL 5.0
or later. (Bug#19371)
Constant expressions and some numeric constants used as input
parameters to user-defined functions were not treated as
constants. (Bug#18761)
Subqueries of the form NULL IN (SELECT ...)
returned invalid results. (Bug#8804, Bug#23485)
The --extern option for
mysql-test-run.pl did not function
correctly. (Bug#24354)
INET_ATON() returned a signed
BIGINT value, not an unsigned value. (Bug#21466)
ALTER TABLE statements that performed both
RENAME TO and {ENABLE|DISABLE}
KEYS operations caused a server crash. (Bug#24089)
myisampack wrote to unallocated memory,
causing a crash. (Bug#17951)
Some small double precision numbers (such as
1.00000001e-300) that should have been
accepted were truncated to zero. (Bug#22129)
The mysql.server script used the
source command, which is less portable than
the . command; it now uses
. instead. (Bug#24294)
DATE_ADD() requires complete dates with no
“zero” parts, but sometimes did not return
NULL when given such a date. (Bug#22229)
Using FLUSH TABLES in one connection while
another connection is using HANDLER
statements caused a server crash. (Bug#21587)
FLUSH LOGS or mysqladmin
flush-logs caused a server crash if the binary log
was not open. (Bug#17733)
Subqueries for which a pushed-down condition did not produce
exactly one key field could cause a server crash. (Bug#24056)
LAST_DAY('0000-00-00') could cause a server
crash. (Bug#23653)
Through the C API, the member strings in
MYSQL_FIELD for a query that contains
expressions may return incorrect results. (Bug#21635)
mysql_affected_rows() could return values
different from mysql_stmt_affected_rows()
for the same sequence of statements. (Bug#23383)
IN() and CHAR() can
return NULL, but did not signal that to the
query processor, causing incorrect results for IS
NULL operations. (Bug#17047)
A trigger that invoked a stored function could cause a server
crash when activated by different client connections. (Bug#23651)
CONCURRENT did not work correctly for
LOAD DATA INFILE. (Bug#20637)
Inserting a default or invalid value into a spatial column
could fail with Unknown error rather than a
more appropriate error. (Bug#21790)
The server could send incorrect column count information to
the client for queries that produce a larger number of columns
than can fit in a two-byte number. (Bug#19216)
Evaluation of subqueries that require the filesort algorithm
were allocating and freeing the
sort_buffer_size buffer many times,
resulting in slow performance. Now the buffer is allocated
once and reused. (Bug#21727)
SQL statements close to the size of
max_allowed_packet could produce binary log
events larger than max_allowed_packet that
could not be read by slave servers. (Bug#19402)
View columns were always handled as having implicit
derivation, leading to illegal mix of collation
errors for some views in UNION
operations. Now view column derivation comes from the original
expression given in the view definition. (Bug#21505)
If elements in a non-top-level IN subquery
were accessed by an index and the subquery result set included
a NULL value, the quantified predicate that
contained the subquery was evaluated to
NULL when it should return a
non-NULL value. (Bug#23478)
Calculation of COUNT(DISTINCT),
AVG(DISTINCT), or
SUM(DISTINCT) when they are referenced more
than once in a single query with GROUP BY
could cause a server crash. (Bug#23184)
For a cast of a DATETIME value containing
microseconds to DECIMAL, the microseconds
part was truncated without generating a warning. Now the
microseconds part is preserved. (Bug#19491)
Metadata for columns calculated from scalar subqueries was
limited to integer, double, or string, even if the actual type
of the column was different. (Bug#11032)
Using EXPLAIN caused a server crash for
queries that selected from
INFORMATION_SCHEMA in a subquery in the
FROM clause. (Bug#22413)
Invalidating the query cache caused a server crash for
INSERT INTO ... SELECT statements that
selected from a view. (Bug#20045)
Slave servers would retry the execution of a SQL statement an
infinite number of times, ignoring the value
SLAVE_TRANSACTION_RETRIES when using the
NDB engine. (Bug#16228)
On slave servers, transactions that exceeded the lock wait
timeout failed to roll back properly. (Bug#20697)
Changes to character set variables prior to an action on a
replication-ignored table were forgotten by slave servers.
(Bug#22877)
With lower_case_table_names set to 1,
SHOW CREATE TABLE printed incorrect output
for table names containing Turkish I (LATIN CAPITAL LETTER I
WITH DOT ABOVE). (Bug#20404)
When applying the group_concat_max_len
limit, GROUP_CONCAT() could truncate
multi-byte characters in the middle. (Bug#23451)
For some problems relating to character set conversion or
incorrect string values for INSERT or
UPDATE, the server was reporting truncation
or length errors instead. (Bug#18908)
Several string functions could return incorrect results when
given very large length arguments. (Bug#10963)
Certain malformed INSERT statements could
crash the mysql client. (Bug#21142)
NDB Cluster: Data nodes added while the
cluster was running in single user mode were all assigned node
ID 0, which could later cause multiple node failures. Adding
of nodes in single user mode is no longer possible. (Bug#20395)
NDB Cluster: Attempting to create an
NDB table on a MySQL with an existing
non-Cluster table with the same name in the same database
could result in data loss or corruption. MySQL now issues a
warning when a SHOW TABLES or other
statement causing table discovery finds such a table. (Bug#21378)
NDB Cluster (NDB API): Inacivity timeouts
for scans were not correctly handled. (Bug#23107)
NDB Cluster (NDB API): Attempting to read a
nonexistent tuple using Commit mode for
NdbTransaction::execute() caused node
failures. (Bug#22672)
NDB Cluster (NDB API): Scans closed before
being executed were still placed in the send queue. (Bug#21941)
NDB Cluster (NDB API): The
NdbOperation::getBlobHandle() method, when
called with the name of a nonexistent column, caused a
segmentation fault. (Bug#21036)
NDB Cluster: A problem with takeover during
a system restart caused ordered indexes to be rebuilt
incorrectly. (Bug#15303)
NDB Cluster: The
ndb_config utility did not perform host
lookups correctly when using the --host
option. (Bug#17582)
NDB Cluster: The
ndb_config utility did not perform host
lookups correctly when using the --host
option (Bug#17582)
NDB Cluster: The error returned by the
cluster when too many nodes were defined did not make clear
the nature of the problem. (Bug#19045)
NDB Cluster: ndb_mgm -e show |
head would hang after displaying the first 10 lines
of output. (Bug#19047)
NDB Cluster: In rare situations with
resource shortages, a crash could result from insufficient
IndexScanOperations. (Bug#19198)
NDB Cluster: ndb_restore
did not always make clear that it had recovered successfully
from temporary errors while restoring a cluster backup. (Bug#19651)
NDB Cluster: Error messages given when
trying to make online changes parameters such as
NoOfReplicas thast can only be changed via
a complete shutdown and restart of the cluster did not
indicate the true nature of the problem. (Bug#19787)
NDB Cluster: Following the restart of an
MGM node, the Cluster management client did not automatically
reconnect. (Bug#19873)
NDB Cluster: In some cases where
SELECT COUNT(*) from an
NDB table should have yielded an error,
MAX_INT was returned instead. (Bug#19914)
NDB Cluster (NDB API): When multiple
processes or threads in parallel performed the same ordered
scan with exclusive lock and updating the retrieved records,
the scan could skip some records, which were not updated as a
result. (Bug#20446)
NDB Cluster: Using an invalid node ID with
the management client STOP command could
cause ndb_mgm to hang. (Bug#20575)
NDB Cluster: Under some circumstances,
local checkpointing would hang, keeping any unstarted nodes
from being started. (Bug#20895)
NDB Cluster: Condition pushdown did not
work correctly with DATETIME columns. (Bug#21056)
NDB Cluster: When inserting a row into an
NDB table with a duplicate value for a
non-primary unique key, the error issued would reference the
wrong key. (Bug#21072)
NDB Cluster: Cluster logs were not rotated
following the first rotation cycle. (Bug#21345)
NDB Cluster: The ndb_mgm
management client did not set the exit status on errors,
always returning 0 instead. (Bug#21530)
NDB Cluster: Partition distribution keys
were updated only for the primary and starting replicas during
node recovery. This could lead to node failure recovery for
clusters having an odd number of replicas. (Bug#21535)
Note: We recommend values for
NumberOfReplicas that are even powers of 2,
for best results.
NDB Cluster: The output for the
--help option used with
NDB executable programs
(ndbd, ndb_mgm,
ndb_restore, ndb_config,
and so on) referred to the Ndb.cfg file,
instead of my.cnf. (Bug#21585)
NDB Cluster: The node recovery algorithm
was missing a version check for tables in the
ALTER_TABLE_COMMITTED state (as opposed to
the TABLE_ADD_COMMITTED state, which has
the version check). This could cause inconsistent schemas
across nodes following node recovery. (Bug#21756)
NDB Cluster: A scan timeout returned Error
4028 (Node failure caused abort of
transaction) instead of Error 4008
(Node failure caused abort of
transaction...). (Bug#21799)
NDB Cluster: The --help
output from NDB binaries did not include
file-related options. (Bug#21994)
NDB Cluster: Multiple node restarts in
rapid succession could cause a system restart to fail (Bug#22892), or induce a race condition (Bug#23210).
NDB Cluster: If a node restart could not be
performed from the REDO log, no node takeover took place. This
could cause partitions to be left empty during a system
restart. (Bug#22893)
NDB Cluster: INSERT ... ON
DUPLICATE KEY UPDATE on an NDB
table could lead to deadlocks and memory leaks. (Bug#23200)
NDB Cluster: The management client command
ALL DUMP 1000 would cause the cluster to
crash if data nodes were connected to the cluster but not yret
fully started. (Bug#23203)
NDB Cluster: Cluster backups would fail
when there were more than 2048 schema objects in the cluster.
(Bug#23499)
NDB Cluster: Restoring a cluster failed if
there were any tables with 128 or more columns. (Bug#23502)
If an init_connect SQL statement produced
an error, the connection was silently terminated with no error
message. Now the server writes a warning to the error log.
(Bug#22158)
The internal SQL interpreter of InnoDB
placed an unnecessary lock on the supremum record when
innodb_locks_unsafe_for_binlog=1. This
caused an assertion failure when InnoDB was
built with debugging enabled. (Bug#23769)
If a table contains an AUTO_INCREMENT
column, inserting into an insertable view on the table that
does not include the AUTO_INCREMENT column
should not change the value of
LAST_INSERT_ID(), because the side effects
of inserting default values into columns not part of the view
should not be visible. MySQL was incorrectly setting
LAST_INSERT_ID() to zero. (Bug#22584)
M % 0 returns
NULL, but
(M % 0) IS NULL
evaluated to false. (Bug#23411)
Within a stored routine, a view definition cannot refer to
routine parameters or local variables. However, an error did
not occur until the routine was called. Now it occurs during
parsing of the routine creation statement. (Bug#20953)
Note: A side effect of this
fix is that if you have already created such routines, and
error will occur if you execute SHOW CREATE
PROCEDURE or SHOW CREATE
FUNCTION. You should drop these routines because
they are erroneous.
A client library crash was caused by executing a statement
such as SELECT * FROM t1 PROCEDURE
ANALYSE() using a server side cursor on a table
t1 that does not have the same number of
columns as the output from PROCEDURE
ANALYSE(). (Bug#17039)
mysql did not check for errors when
fetching data during result set printing. (Bug#22913)
Adding a day, month, or year interval to a
DATE value produced a
DATE, but adding a week interval produced a
DATETIME value. Now all produce a
DATE value. (Bug#21811)
The column default value in the output from SHOW
COLUMNS or SELECT FROM
INFORMATION_SCHEMA.COLUMNS was truncated to 64
characters. (Bug#23037)
For not-yet-authenticated connections, the
Time column in SHOW
PROCESSLIST was a random value rather than
NULL. (Bug#23379)
The Host column in SHOW
PROCESSLIST output was blank when the server was
started with the --skip-grant-tables option.
(Bug#22728)
The Handler_rollback status variable
sometimes was incremented when no rollback had taken place.
(Bug#22728)
Within a prepared statement, SELECT (COUNT(*) =
1) (or similar use of other aggregate functions) did
not return the correct result for statement re-execution. (Bug#21354)
Lack of validation for input and output
TIME values resulted in several problems:
SEC_TO_TIME() within subqueries incorrectly
clipped large values; SEC_TO_TIME() treated
BIGINT UNSIGNED values as signed; only
truncation warnings were produced when both truncation and
out-of-range TIME values occurred. (Bug#11655, Bug#20927)
Range searches on columns with an index prefix could miss
records. (Bug#20732)
With SQL_MODE=TRADITIONAL, MySQL
incorrectly aborted on warnings within stored routines and
triggers. (Bug#20028)
In mysql, invoking
connect or \r with very
long db_name or
host_name parameters caused buffer
overflow. (Bug#20894)
mysqldump --xml produced invalid XML for
BLOB data. (Bug#19745)
For a debug server, a reference to an undefined user variable
in a prepared statment executed with
EXECUTE caused an assertion failure. (Bug#19356)
Within a trigger for a base table, selecting from a view on
that base table failed. (Bug#19111)
DELETE IGNORE could hang for foreign key
parent deletes. (Bug#18819)
Transient errors in replication from master to slave may
trigger multiple Got fatal error 1236: 'binlog
truncated in the middle of event' errors on the
slave. (Bug#4053)
The value of the warning_count system
variable was not being calculated correctly (also affecting
SHOW COUNT(*) WARNINGS). (Bug#19024)
InnoDB exhibited thread thrashing with more
than 50 concurrent connections under an update-intensive
workload. (Bug#22868)
InnoDB showed substandard performance with
multiple queries running concurrently. (Bug#15815)
There was a race condition in the InnoDBfil_flush_file_spaces() function. (Bug#24089)
FROM_UNIXTIME() did not accept arguments up
to POWER(2,31)-1, which it had previously.
(Bug#9191)
Some yaSSL-related memory leaks detected by Valgrind were
fixed. (Bug#23981)
If COMPRESS() returned
NULL, subsequent invocations of
COMPRESS() within a result set or within a
trigger also returned NULL. (Bug#23254)
mysql would lose its connection to the
server if its standard output was not writable. (Bug#17583)
mysql-test-run did not work correctly for
RPM-based installations. (Bug#17194)
The return value from my_seek() was
ignored. (Bug#22828)
Use of PREPARE with a CREATE
PROCEDURE statement that contained a syntax error
caused a server crash. (Bug#21868)
Use of a DES-encrypted SSL certificate file caused a server
crash. (Bug#21868)
Column names were not quoted properly for replicated views.
(Bug#19736)
InnoDB used table locks (not row locks)
within stored functions. (Bug#18077)
Statements such as DROP PROCEDURE and
DROP VIEW were written to the binary log
too late due to a race condition. (Bug#14262)
MySQL would fail to build on the Alpha platform. (Bug#23256)
The optimizer failed to use equality propagation for
BETWEEN and IN
predicates with string arguments. (Bug#22753)
The optimizer used the ref join type rather
than eq_ref for a simple join on strings.
(Bug#22367)
The WITH CHECK OPTION for a view failed to
prevent storing invalid column values for
UPDATE statements. (Bug#16813)
A literal string in a GROUP BY clause could
be interpreted as a column name. (Bug#14019)
Some queries that used MAX() and
GROUP BY could incorrectly return an empty
result. (Bug#22342)
WITH ROLLUP could group unequal values.
(Bug#20825)
Use of a subquery that invoked a function in the column list
of the outer query resulted in a memory leak. (Bug#21798)
LIKE searches failed for indexed
utf8 character columns. (Bug#20471)
FLUSH INSTANCES in Instance Manager
triggered an assertion failure. (Bug#19368)
ALTER TABLE was not able to rename a view.
(Bug#14959)
Entries in the slow query log could have an incorrect
Rows_examined value. (Bug#12240)
Insufficient memory
(myisam_sort_buffer_size) could cause a
server crash for several operations on
MyISAM tables: repair table, create index
by sort, repair by sort, parallel repair, bulk insert. (Bug#23175)
OPTIMIZE TABLE with
myisam_repair_threads > 1 could result
in MyISAM table corruption. (Bug#8283)
Selecting from a MERGE table could result
in a server crash if the underlying tables had fewer indexes
than the MERGE table itself. (Bug#22937)
A locking safety check in InnoDB reported a
spurious error stored_select_lock_type is 0 inside
::start_stmt() for INSERT ...
SELECT statements in
innodb_locks_unsafe_for_binlog mode. The
safety check was removed. (Bug#10746)
For multiple-table UPDATE statements,
storage engines were not notified of duplicate-key errors.
(Bug#21381)
Incorrect results could be obtained from re-execution of a
parametrized prepared statement or a stored routine with a
SELECT that uses LEFT
JOIN with a second table having only one row. (Bug#21081)
An UPDATE that referred to a key column in
the WHERE clause and activated a trigger
that modified the column resulted in a loop. (Bug#20670)
Creating a TEMPORARY table with the same
name as an existing table that was locked by another client
could result in a lock conflict for DROP TEMPORARY
TABLE because the server unnecessarily tried to
acquire a name lock. (Bug#21096)
After FLUSH TABLES WITH READ LOCK followed
by UNLOCK TABLES, attempts to drop or alter
a stored routine failed with an error that the routine did not
exist, and attempts to execute the routine failed with a lock
conflict error. (Bug#21414)
SHOW VARIABLES truncated the
Value field to 256 characters. (Bug#20862)
Instance Manager didn't close the client socket file when
starting a new mysqld instance.
mysqld inherited the socket, causing
clients connected to Instance Manager to hang. (Bug#12751)
Instance Manager had a race condition involving
mysqld PID file removal. (Bug#22379)
It was possible for a stored routine with a
non-latin1 name to cause a stack overrun.
(Bug#21311)
MySQL 5.0.26 introduced an ABI incompatibility, which this
release reverts. Programs compiled against 5.0.26 are not
compatible with any other version and must be recompiled. (Bug#23427)
InnoDB: Reduced optimization level for
Windows 64 builds to handle possible memory overrun. (Bug#19424)
D.1.4. Release Notes for MySQL Community Server 5.0.27 (21 October 2006)
This is a bugfix release for the current production release
family. It replaces MySQL 5.0.26.
Functionality added or changed:
This is the last version for which binary MySQL-Max
distributions are available, except for RPM distributions.
(For RPM distributions, the last version is 5.0.37.)
Bugs fixed:
MySQL 5.0.26 introduced an ABI incompatibility, which this
release reverts. Programs compiled against 5.0.26 are not
compatible with any other version and must be recompiled. (Bug#23427)