One of the hash functions employed by the BNLH join algorithm
calculates the the value of hash index for key value utilizing
every byte of the key buffer. To make this calculation valid
one has to ensure that for any key value unused bytes of the
buffer are filled with with a certain filler. We choose 0 as
a filler for these bytes.
Added an optional boolean parameter with_zerofill to the function
key_copy. If the value of the parameter is TRUE all unused bytes
of the key buffer is filled with 0.
In some cases the function make_cond_for_index() was mistaken
when detecting index only pushdown conditions for a table:
a pushdown condition that was not index only could be marked
as such.
It happened because the procedure erroneously used the markers
for index only conditions that remained from the calls of
this function that extracted the index conditions for other
tables.
Fixed by erasing index only markers as soon as they are need
anymore.
- This allows us to detect missing my_afree() calls and also find overruns (when running with valgrind) to alloca() areas.
- Added missing my_afree() calls
- Fixed wrong call to my_afree()
include/my_sys.h:
When compiling with valgrind, change my_alloca() to use my_malloc()
mysql-test/suite/innodb/t/innodb_bug57255.test:
Speed up taste case (patch from Stewart Smith)
mysql-test/suite/innodb_plugin/t/innodb_bug57255.test:
Speed up taste case (patch from Stewart Smith)
sql/ha_partition.cc:
Removed casts from my_afree()
sql/opt_range.cc:
Add missing my_afree() calls.
storage/maria/ma_rt_split.c:
Fixed wrong parameter to my_afree()
Made archive.test a bit more safe
mysql-test/r/archive.result:
Added removal of files to make rerun of failed test work
mysql-test/t/archive.test:
Added removal of files to make rerun of failed test work
mysys/thr_lock.c:
Better warning message if lock test fails
Also:
Changed the value of TIME_FOR_COMPARE_ROWID to make it the same as for MWL 21.
Changed some queries in range_vs_index_merge.test to make them generate
the same plans as earlier.
- Make Mrr_ordered_index_reader() save the rowid across scan interruptions
Also
- Fix compiler warning for setup_buffer_sizes()
- Add commented key_copy/key_restore for better handling of a similar issue
with index record being destroyed by scan interruption (which causes
incorrect evaluation of pushed index condition later on).
Fixed compiler warning
mysql-test/r/named_pipe.result:
Fixed test results for windows builds
mysql-test/r/shm.result:
Fixed test results for windows builds
sql/item_cmpfunc.cc:
Fixed compiler warning about uninitialized "first"
Problem is that these tests run with --innodb-lock-wait-timeout=2 in .opt
(and this is necessary as built-in innodb does not allow to change this
dynamically). This cases another part of the test to occasionally time
out an UPDATE, which subsequently caused the test case to timeout due to
waiting for a condition (successful UPDATE) that never occurs.
Fixed by re-trying the update in case of timeout.
Tested by inserting a sleep() in the connection that the UPDATE is waiting
for, and checking that the retry loops a couple of times until the other
connection is done and COMMITs.
When ORing two AND-OR formulas the range optimizer could miss
a conjunct in one of AND-OR formulas in the result. If the
index merge union plan to access a table is formed by this
formula that, in general, is not inferred from the original
where/on condition,the query could return an incorrect result set.
- Fixed problem with oqgraph and 'make dist'
Note that after this merge we have a problem show in join_outer where we examine too many rows in one specific case (related to BUG#57024).
This will be fixed when mwl#128 is merged into 5.3.
A crash may happenin the cases when the range optimizer tried to OR
two index merge such that the second one contained less range trees
than the first one.
The bug was introduced by the patch of MWL#24:
"index_merge: fair choice between index_merge union and range access".
If a primary key was used in the index intersection for
an InnoDB database the size of the memory allocated
for the best index intersection plan was one element less
than it was needed. That could cause a memory overwrite
and a crash as a result of it.
- Moved end_pagecache() to after maria_close()
- Flush page cache before closing files (in maria_pack)
Fixed test suite failure for PBXT
mysql-test/suite/pbxt/r/select.result:
We mask out the 'rows' column because it may differ from run to run
mysql-test/suite/pbxt/t/select.test:
We mask out the 'rows' column because it may differ from run to run
storage/maria/maria_chk.c:
Moved end_pagecache() to after maria_close() to not trigger end-consistency testing of pagecache.
storage/maria/maria_pack.c:
Moved end_pagecache() to after maria_close() to not trigger end-consistency testing of pagecache.
flush page cache before closing files.
A crash may happenin the cases when the range optimizer tried to OR
two index merge such that the second one contained less range trees
than the first one.
The bug was introduced by the patch of MWL#24:
"index_merge: fair choice between index_merge union and range access".
independent execution plans.
Fixed a bug in Unique::unique_add that caused a crash for a query from
index_intersect_innodb on some platforms.
Fixed two bugs in opt_range.cc that led to the choice of not the
cheapest plans for index intersections.
Fixed timing test failures.
Fixed a failure in the Aria engines page cache and log handler (found with maria.maria-big test)
- This could cause a core dump when deleting big blobs.
- Added test to end_pagecache() to verify that page cache was correctly used.
- inc_counter_for_resize_op and dec_counter_for_resize_op are called same number of times.
- All page cache blocks was properly deallocated (empty)
mysql-test/suite/innodb/t/innodb_bug38231.test:
Fixed timing issue (code comment says it all)
mysql-test/suite/innodb_plugin/t/innodb_bug38231.test:
Fixed timing issue (code comment says it all)
sql/debug_sync.cc:
Fixed compiler warning
storage/maria/ma_loghandler.c:
Fixed bug found by maria.maria-big test:
- Fixed race condition between update thread logging a very big blog and checkpoint thread.
storage/maria/ma_pagecache.c:
Added assert to ensure mutex was properly locked.
Added test to end_pagecache() to verify that page cache was correctly used.
- inc_counter_for_resize_op and dec_counter_for_resize_op are called same number of times.
- All page cache blocks was properly deallocated (empty)
In pagecache_delete_internal(), properly reset counters and pins if functions aborts.
Added missing inc_counter_for_resize_op() to pagecache_wait_lock().
Added missing dec_counter_for_resize_op() to pagecache_delete()
Analysis:
The fix for LP BUG#680846 avoids evaluation of constant expressions
with subqueries in the GROUP/ORDER clauses in the procedure
remove_const(). The purpose of remove_const is to remove constant
expressions in the GROUP/ORDER clauses.
In order delay until execution the evaluation of such subqueries,
they were not removed in the GROUP/ORDER clause. As a result temp
table creation during execution attempted to create a column in the
temp table for each constant GROUP/ORDER expression. However, the
logic in create_tmp_table is to not create temp table columns for
constant items. The crash was due to a group Item without a
corresponding column in the temp table for GROUP BY.
Solution:
The patch adds back removal of constant expressions with subqueries.
In order for such expressions to be evaluated, so that the server can
ensure that such subquries return 1 row, the evaluation of these
expressions is delayed until execution.
