A client doing multiple mysql_library_init() and
mysql_library_end() calls over the lifetime of the process may
experience lost character set data, potentially even a
SIGSEGV.
This patch reinstates the reloading of character set data when
a mysql_library_init() is done after a mysql_library_end().
Incremental commit based on previous patch.
Addresses reviewer comments to move reseting of
thd->current_stmt_binlog_row_based to after binlog_query
takes place.
The problem was that the CSV storage engine does not support NULL
fields, yet in some early 5.1 version the log tables (general_log
and slow_log) were created with null fields. On top of this, when
altering a CSV table column, all fields of the table must be NOT
NULL otherwise the alteration fails.
The solution is to ensure that during upgrade all columns of the
log tables are NOT NULL.
The test failed due to Bug #29790.
However, logics of the failing part does not need I_S selecting.
Fixing to remove the non-deterministic I_S selecting as redundant
from a part of the test dealing with BUG@22864.
The problem is that cond->fix_fields(thd, 0) breaks
condition(cuts off 'having'). The reason of that is
that NULL valued Item pointer is present in the
middle of Item list and it breaks the Item processing
loop.
performance degradation.
Filesort + join cache combination is preferred to full index scan because it
is usually faster. But it's not the case when the index is clustered one.
Now test_if_skip_sort_order function prefers filesort only if index isn't
clustered.
Detailed revision comments:
r6669 | jyang | 2010-02-11 12:24:19 +0200 (Thu, 11 Feb 2010) | 7 lines
branches/5.1: Fix bug #50691, AIX implementation of readdir_r
causes InnoDB errors. readdir_r() returns an non-NULL value
in the case of reaching the end of a directory. It should
not be treated as an error return.
rb://238 approved by Marko
Detailed revision comments:
r6613 | inaam | 2010-02-09 20:23:09 +0200 (Tue, 09 Feb 2010) | 11 lines
branches/5.1: Fix Bug #38901
InnoDB logs error repeatedly when trying to load page into buffer pool
In buf_page_get_gen() if we are unable to read a page (because of
corruption or some other reason) we keep on retrying. This fills up
error log with millions of entries in no time and we'd eventually run
out of disk space. This patch limits the number of attempts that we
make (currently set to 100) and after that we abort with a message.
rb://241 Approved by: Heikki
Detailed revision comments:
r6545 | jyang | 2010-02-03 03:57:32 +0200 (Wed, 03 Feb 2010) | 8 lines
branches/5.1: Fix bug #49001, "SHOW INNODB STATUS deadlock info
incorrect when deadlock detection aborts". Print the correct
lock owner when recursive function lock_deadlock_recursive()
exceeds its maximum depth LOCK_MAX_DEPTH_IN_DEADLOCK_CHECK.
rb://217, approved by Marko.
Detailed revision comments:
r6538 | sunny | 2010-01-30 00:43:06 +0200 (Sat, 30 Jan 2010) | 6 lines
branches/5.1: Check *first_value every time against the column max
value and set *first_value to next autoinc if it's > col max value.
ie. not rely on what is passed in from MySQL.
[49497] Error 1467 (ER_AUTOINC_READ_FAILED) on inserting a negative value
rb://236
Detailed revision comments:
r6536 | sunny | 2010-01-30 00:13:42 +0200 (Sat, 30 Jan 2010) | 6 lines
branches/5.1: Check *first_value everytime against the column max
value and set *first_value to next autoinc if it's > col max value.
ie. not rely on what is passed in from MySQL.
[49497] Error 1467 (ER_AUTOINC_READ_FAILED) on inserting a negative value
rb://236
Detailed revision comments:
r6535 | sunny | 2010-01-30 00:08:40 +0200 (Sat, 30 Jan 2010) | 11 lines
branches/5.1: Undo the change from r6424. We need to return DB_SUCCESS even
if we were unable to initialize the tabe autoinc value. This is required for
the open to succeed. The only condition we currently treat as a hard error
is if the autoinc field instance passed in by MySQL is NULL.
Previously if the table autoinc value was 0 and the next value was requested
we had an assertion that would fail. Change that assertion and treat a value
of 0 to mean that the autoinc system is unavailable. Generation of next
value will now return failure.
rb://237
Propagation of a large unsigned numeric constant
in the WHERE expression led to wrong result.
For example,
"WHERE a = CAST(0xFFFFFFFFFFFFFFFF AS USIGNED) AND FOO(a)",
where a is an UNSIGNED BIGINT, and FOO() accepts strings,
was transformed to "... AND FOO('-1')".
That has been fixed.
Also EXPLAIN EXTENDED printed incorrect numeric constants in
transformed WHERE expressions like above. That has been
fixed too.
The problem was in an incorrect debug assertion. The expression
used in the failing assertion states that when finding
references matching ORDER BY expressions, there can be only one
reference to a single table. But that does not make any sense,
all test cases for this bug are valid examples with multiple
identical WHERE expressions referencing the same table which
are also present in the ORDER BY list.
Fixed by removing the failing assertion. We also have to take
care of the 'found' counter so that we count multiple
references only once. We rely on this fact later in
eq_ref_table().
For temporary tables that are created with an engine that does
not provide the HTON_CAN_RECREATE, the truncate operation is
performed resorting to the optimized handler::ha_delete_all_rows
method. However, this means that the truncate will share
execution path, from mysql_delete, with truncate on regular
tables and other delete operations. As a consequence the truncate
operation, for the temporary table is logged, even if in row mode
because there is no distinction between this and the other delete
operations at binlogging time.
We fix this by checking if: (i) the binlog format, when the
truncate operation was issued, is ROW; (ii) if the operation is a
truncate; and (iii) if the table is a temporary table; before
writing to the binary log. If all three conditions are met, we
skip writing to the binlog. A side effect of this fix is that we
limit the scope of setting and resetting the
current_stmt_binlog_row_based. Now we just set and reset it
inside mysql_delete in the boundaries of the
handler::ha_write_row loop. This way we have access to
thd->current_stmt_binlog_row_based real value inside
mysql_delete.
"TYPE=storage_engine" is deprecated, and will be removed
in the Celosia release of MySQL. Since the option is
present in the Betony release and the version number of
Celosia is still not decided, we need to bump the
deprecation version number back up to "6.0".
When EXPLAIN EXTENDED tries to print column names, it checks whether the
referenced table is CONST (in which case, the column's value rather than
its name will be printed). If no proper table is reference (i.e. because
a derived table was used that has since gone out of scope), this will fail
spectacularly.
This ports an equivalent of the fix for Bug 43354.
