Problem was that the partition containing NULL values
was pruned away, since '2001-01-01' < '2001-02-00' but
TO_DAYS('2001-02-00') is NULL.
Added the NULL partition for RANGE/LIST partitioning on TO_DAYS()
function to be scanned too.
Also fixed a bug that added ALLOW_INVALID_DATES to sql_mode
(SELECT * FROM t WHERE date_col < '1999-99-99' on a RANGE/LIST
partitioned table would add it).
when partition is reoganized.
Problem was that table->timestamp_field_type was not changed
before copying rows between partitions.
fixed by setting it to TIMESTAMP_NO_AUTO_SET as the first thing
in fast_alter_partition_table, so that all if-branches is covered.
We disallow the partitioning of a log table. You could however
partition a table first, and then point logging to it. This is
not only against the docs, it also crashes the server.
We catch this case now.
contains ONLY_FULL_GROUP_BY
The partitioning code needs to issue a Item::fix_fields()
on the partitioning expression in order to prepare
it for being evaluated.
It does this by creating a special table and a table list
for the scope of the partitioning expression.
But when checking ONLY_FULL_GROUP_BY the
Item_field::fix_fields() was relying that there always be
cached_table set and was trying to use it to get the
select_lex of the SELECT the field's table is in.
But the cached_table was not set by the partitioning code
that creates the artificial TABLE_LIST used to resolve the
partitioning expression and this resulted in a crash.
Fixed by rectifying the following errors :
1. Item_field::fix_fields() : the code that check for
ONLY_FULL_GROUP_BY relies on having tables with
cacheable_table set. This is mostly true, the only
two exceptions being the partitioning context table
and the trigger context table.
Fixed by taking the current parsing context if no pointer
to the TABLE_LIST instance is present in the cached_table.
2. fix_fields_part_func() :
2a. The code that adds the table being created to the
scope for the partitioning expression is mostly a copy
of the add_table_to_list and friends with one exception :
it was not marking the table as cacheable (something that
normal add_table_to_list is doing). This caused the
problem in the check for ONLY_FULL_GROUP_BY in
Item_field::fix_fields() to appear.
Fixed by setting the correct members to make the table
cacheable.
The ideal structural fix for this is to use a unified
interface for adding a table to a table list
(add_table_to_list?) : noted in a TODO comment
2b. The Item::fix_fields() was called with a NULL destination
pointer. This causes uninitalized memory reads in the
overloaded ::fix_fields() function (namely
Item_field::fix_fields()) as it expects a non-zero pointer
there. Fixed by passing the source pointer similarly to how
it's done in JOIN::prepare().
The problem: described in the bug report.
The fix:
--increase buffers where it's necessary
(buffers which are used in stxnmov)
--decrease buffer lengths which are used
Problem was an errornous date that lead to end partition
was before the start, leading to a crash.
Solution was to check greater or equal instead of only
equal between start and end partition.
NOTE: partitioning pruning handles incorrect dates
differently than index lookup, which can give different
results in a partitioned table versus a non partitioned
table for queries having 'bad' dates in the where clause.
The non documented command 'ALTER PARTITION t REORGANIZE PARTITION'
(without any partitions!) which only make sense for nativly
partitioned engines, such as NDB, crashes the server if there was
no change of number of partitions.
The problem was wrong usage of fast_end_partition function,
which led to usage of a non initialized variable.
Occurred with EXTRA_DEBUG on windows.
Problem was insufficient length of a local variable that stored path names.
Solution was to use the correct length.
The partitioning clause is only a very long single line, which is very
hard to interpret for a human. This patch breaks the partitioning
syntax into one line for the partitioning type, and one line per
partition/subpartition.
on non-partitioned table
Problem was that partitioning specific commands was accepted
for non partitioned tables and treated like
ANALYZE/CHECK/OPTIMIZE/REPAIR TABLE, after bug-20129 was fixed,
which changed the code path from mysql_alter_table to
mysql_admin_table.
Solution was to check if the table was partitioned before
trying to execute the admin command
InnoDB Plugin locks table
The fast/on-line add/drop index handler calls was not implemented
whithin the partitioning.
This implements it in the partitioning handler.
Since this is only used by the not included InnoDB plugin, there
is no test case. (Have tested it manually with the plugin, and
it does not allow unique indexes not including partitioning
function, or removal of pk, which in innodb generates a new pk,
which is not in the partitioning function.)
NOTE: This introduces a new handler method, and because of that
changes the storage engine api. (One cannot use a handlerton to
see the capabilities of a table's handler if it is partitioned.
So I added a wrapper function in the handler that defaults to
the handlerton function, which the partitioning handler overrides.
partition is corrupt
The main problem was that ALTER TABLE t ANALYZE/CHECK/OPTIMIZE/REPAIR
PARTITION took another code path (over mysql_alter_table instead of
mysql_admin_table) which differs in two ways:
1) alter table opens the tables in a different way than admin tables do
resulting in returning with error before it tried the command
2) alter table does not start to send any diagnostic rows to the client
which the lower admin functions continue to use -> resulting in
assertion crash
The fix:
Remapped ALTER TABLE t ANALYZE/CHECK/OPTIMIZE/REPAIR PARTITION to use
the same code path as ANALYZE/CHECK/OPTIMIZE/REPAIR TABLE t.
Adding check in mysql_admin_table to setup the partition list for
which partitions that should be used.
Partitioned tables will still not work with
REPAIR TABLE/PARTITION USE_FRM, since that requires moving partitions
to tables, REPAIR TABLE t USE_FRM, and check that the data still
fulfills the partitioning function and then move the table back to
being a partition.
NOTE: I have removed the following functions from the handler
interface:
analyze_partitions, check_partitions, optimize_partitions,
repair_partitions
Since they are not longer needed.
THIS ALTERS THE STORAGE ENGINE API
Fixed a missed case in the patch for Bug#31931.
Also makes Bug#33722 a duplicate of Bug#31931.
Added tests for better coverage.
Replaced some legacy function calls.
a SELECT doesn't cause ROLLBACK of statem".
The idea of the fix is to ensure that we always commit the current
statement at the end of dispatch_command(). In order to not issue
redundant disc syncs, an optimization of the two-phase commit
protocol is implemented to bypass the two phase commit if
the transaction is read-only.
Problem was that the mix of handlers was not consistent between
CREATE and ALTER
changed so that it works like:
- All partitions must use the same engine
AND it must be the same as the table.
- if one does NOT specify an engine on the table level
then one must either NOT specify any engine on any
partition/subpartition OR for ALL partitions/subpartitions
Note: that after a table have been created, the storage engine
is specified for all parts of the table (table/partition/subpartition)
and so when using alter, one does not need to specify it (unless one
wants to change the storage engine, then one have to specify it on the
table level)
called from a SELECT doesn't cause ROLLBACK of state"
Make private all class handler methods (PSEA API) that may modify
data. Introduce and deploy public ha_* wrappers for these methods in
all sql/.
This necessary to keep track of all data modifications in sql/,
which is in turn necessary to be able to optimize two-phase
commit of those transactions that do not modify data.
