If a materialized derived table / view is empty then for this table
the value of file->ref is 0. This was not taken into account by
the function JOIN_CACHE::write_record_data. As a result a query
using an empty materialized derived tables as inner tables of outer
joins and IN subqueries in WHERE conditions could cause server crashes
when the optimizer employed join caches and duplicate elimination for
semi-joins.
This bug happened for the queries over multi-table mergeable views
because the bitmap TABLE::read_set of the underlying tables were not
updated after the views had been merged into the query.
Now this bitmaps are updated properly.
Also the bitmap TABLE::merge_keys now is updated in prevention of
future bugs.
The function JOIN::drop_unused_derived_keys could erroneously set
the value of REF::key to 0 for a joined materialized view/derived table
in the case when no REF access to the table was used by the query
execution plan. This could cause a crash of the server.
This bug happened due to incompleteness of the fix for bug 872735:
the occurrences of the fields in the conditions of correlated
subqueries were not taken into account when recalculating
covering keys bit maps.
mysql-test/include/check_ipv6.inc:
don't try to connect to ipv6 address - the server isn't necessarily listening
(e.g. a master doesn't, but a slave does. or vice versa)
mysql-test/include/default_mysqld.cnf:
move hard-coded values from ConfigFactory.pm to a template.
really disable syncs
mysql-test/include/have_archive_plugin.inc:
wrong test. plugin is loaded in the test, it cannot be available before it
mysql-test/include/have_blackhole_plugin.inc:
wrong test. plugin is loaded in the test, it cannot be available before it
mysql-test/include/have_federated_plugin.inc:
wrong test. plugin is loaded in the test, it cannot be available before it
mysql-test/lib/My/ConfigFactory.pm:
move hard-coded values from ConfigFactory.pm to a template.
really disable syncs
mysql-test/mysql-test-run.pl:
formatting
mysql-test/suite/funcs_1/t/is_engines_federated.opt:
federated can be a plugin
mysql-test/suite/innodb/suite.pm:
don't load xtradb plugin in embedded server - it lacks some symbols that xtradb needs
mysql-test/suite/unit/suite.pm:
don't run unit tests in --embedded-server
(for simplicity and speed)
sql/sql_insert.cc:
CREATE ... IF NOT EXISTS may do nothing, but
it is still not a failure. don't forget to my_ok it.
******
CREATE ... IF NOT EXISTS may do nothing, but
it is still not a failure. don't forget to my_ok it.
sql/sql_table.cc:
small cleanup
******
small cleanup
This bug manifested itself with queries containing non-correlated
IN subqueries over materialized views/derived tables.
The bug happened because the code of the function generate_derived_keys did
not take into account that the function could be called twice when the
optimizer was deciding whether in-exist transformation should be applied.
This bug happened because the maps of covering keys for mergeable derived
tables/views was not recalculated after the derived tables/vies had been
merged into the main query.
- in make_join_select(), use the correct condition to check whether the current table is a SJM nest (the previous
condition used to be correct before, but then sj-materialization temp table creation was moved to happen before
make_join_select was called)
This bug is a consequence of the fix in the function add_ref_to_table_cond
for LP bug 826935 that turned out to be not quite correct: it tried to AND
the same generated condition with two different other conditions.
This patch creates a copy of the generated condition if the condition needs
to be ANDed with two different items.
Cleanup: Changed procedure type from a int/char to an enum for easier to manage and debug code.
mysql-test/r/trigger.result:
Test that mysql.proc is not used as part of creating or using a trigger.
mysql-test/t/trigger.test:
Test that mysql.proc is not used as part of creating or using a trigger.
sql/sp.cc:
The main bug fix is to not look up triggers in mysql.proc; This is done by ignoreing type == TYPE_ENUM_TRIGGER in sp_add_used_routine()
Cleanup: Changed procedure type from a int/char to an enum.
sql/sp.h:
Cleanup: Changed procedure type from a int/char to an enum.
sql/sp_head.h:
Cleanup: Changed procedure type from a int/char to an enum.
sql/sql_db.cc:
Fix include order
sql/sql_lex.cc:
Fix include order
sql/sql_parse.cc:
Cleanup: Changed procedure type from a int/char to an enum.
sql/sql_show.cc:
Fix include order
sql/sql_view.cc:
Fix include order
Added suppression message for valgrind failure found on OpenSuSE 11.1
mysql-test/mysql-test-run.pl:
Fix for issue found in buildbot where mysqld.*.err files was missing
Patch by Kristian Nielsen
mysql-test/valgrind.supp:
Added suppression message for valgrind failure found on OpenSuSE 11.1
sql/mysqld.cc:
Added missing space to comment
This is a redo for 5.5
Added 'innodb_file_format_max' as variable to ignore change to.
Tests that had to restore this amended
Two tests assumed it to be Antelope, make sure these run on a freshly
started server
Coordinate size limitation removed.
per-file comments:
mysql-test/r/gis-precise.result
test result updated.
sql/gcalc_slicescan.cc
Check coordinate extent to pick better precidion in the ::set_double()
sql/gcalc_slicescan.h
free_list() can lead to valgrind warnig. Fixed
sql/gcalc_tools.cc
free_list() call changed.
Problematic query:
insert ignore into `t1_federated` (`c1`) select `c1` from `t1_local` a
where not exists (select 1 from `t1_federated` b where a.c1 = b.c1);
When this query is killed in another connection it could lead to crash.
The problem is follwing:
An attempt to obtain table statistics for subselect table in killed query
fails with an error. So JOIN::optimize() for subquery is failed but
it does not prevent further subquery evaluation.
At the first subquery execution JOIN::optimize() is called
(see subselect_single_select_engine::exec()) and fails with
an error. 'executed' flag is set to TRUE and it prevents
further subquery evaluation. At the second call
JOIN::optimize() does not happen as 'JOIN::optimized' is TRUE
and in case of uncacheable subquery the 'executed' flag is set
to FALSE before subquery evaluation. So we loose 'optimize stage'
error indication (see subselect_single_select_engine::exec()).
In other words 'executed' flag is used for two purposes, for
error indication at JOIN::optimize() stage and for an
indication of subquery execution. And it seems it's wrong
as the flag could be reset.
mysql-test/r/error_simulation.result:
test case
mysql-test/t/error_simulation.test:
test case
sql/item_subselect.cc:
added new flag subselect_single_select_engine::optimize_error
which is used for error detection which could happen at optimize
stage.
sql/item_subselect.h:
added new flag subselect_single_select_engine::optimize_error
sql/sql_select.cc:
test case
Analysis:
The cause of the bug was that the method
subselect_rowid_merge_engine::partial_match()
was not designed for re-execution within the
same query. Specifically, it didn't cleanup
the bitmap of matching keys after completion.
The test query requires double execution of
the IN predicate because it first checks the
predicate as a constant condition. The second
execution during regular execution used the bitmap
of matching keys produced by the first execution
instead of starting with a clean one.
Solution:
Cleanup the bitmap of matching keys at the end of
the partial matching procedure.
bugfix: garbage in PLUGIN_VAR_STR variables when INSTALL'ing a plugin
mysql-test/include/default_mysqld.cnf:
disable feedback plugin by default.
when enabled - tag is as a test run
Analysis:
The cause of the bug was the changed meaning of
subselect_partial_match_engine::has_covering_null_row.
Previously it meant that there is row with NULLs in
all nullable fields of the materialized subquery table.
Later it was changed to mean a row with NULLs in all
fields of this table.
At the same time there was a shortcut in
subselect_rowid_merge_engine::partial_match() that
detected a special case where:
- there is no match in any of the columns with NULLs, and
- there is no NULL-only row that covers all columns with
NULLs.
With the change in the meaning of has_covering_null_row,
the condition that detected this special case was incomplete.
This resulted in an incorrect FALSE, when the result was a
partial match.
Solution:
Expand the condition that detected the special case with the
correct test for the existence of a row with NULL values in
all columns that contain NULLs (a kind of parially covering
NULL-row).
