mutually-nested subqueries

Queries of the form

  SELECT * FROM (SELECT 1) AS t1,
                (SELECT 2) AS t2,...
                (SELECT 32) AS t32

caused the "Too high level of nesting for select" error
as if the query has a form

  SELECT * FROM (SELECT 1 FROM (SELECT 2 FROM (SELECT 3 FROM...


The table_factor parser rule has been modified to adjust
the LEX::nest_level variable value after every derived table.


mysql-test/r/derived.result:
  Added test case for bug #41156.
mysql-test/t/derived.test:
  Added test case for bug #41156.
sql/sql_yacc.yy:
  Bug #41156: List of derived tables acts like a chain of
              mutually-nested subqueries
  
  The select_derived2 parser rule calls mysql_new_select()
  calls push_context() and nest_level++, however only
  the pop_context() was called at the end of derived table
  parsing at the table_factor rule.
  
  The table_factor parser rule has been modified to adjust
  the LEX::nest_level variable value after every derived table.

Remove commented-out test case. It has been moved to innodb_bug21704.test

  sort_buffer_size cannot allocate

The NULL return from tree_insert() (on low memory) was not
checked for in Item_func_group_concat::add(). As a result
on low memory conditions a crash happens.

Fixed by properly checking the return code.

1. BUG#21704 - Renaming column does not update FK definition

2. Changes in mysql-test/include/mtr_warnings.sql so that the testcase
   for BUG#21704 doesn't fail because of the warnings generated.

Detailed revision comments:

r5488 | vasil | 2009-07-09 19:16:44 +0300 (Thu, 09 Jul 2009) | 13 lines
branches/5.1:

Fix Bug#21704 Renaming column does not update FK definition

by checking whether a column that participates in a FK definition is being
renamed and denying the ALTER in this case.

The patch was originally developed by Davi Arnaut <Davi.Arnaut@Sun.COM>:
http://lists.mysql.com/commits/77714
and was later adjusted to conform to InnoDB coding style by me (Vasil),
I also added some more comments and moved the bug specific mysql-test to
a separate file to make it more manageable and flexible.

            and base tables 

myrg_attach_children() could reuse a buffer that was allocated 
previously based on a definition of a child table. The problem 
was that the child's definition might have been changed, so 
reusing the buffer could lead to crashes or valgrind errors 
under some circumstances. 
 
Fixed by changing myrg_attach_children() so that the 
rec_per_key_part buffer is reused only when the child table
have not changed, and reallocated otherwise (the old buffer is 
deallocated if necessary).


include/myisammrg.h:
  Added a pointer to need_compat_check as an argument to
  myrg_attach_children().
mysql-test/r/merge.result:
  Added a test case for bug #45796.
mysql-test/t/merge.test:
  Added a test case for bug #45796.
storage/myisammrg/ha_myisammrg.cc:
  Pass a pointer to need_compat_check to myrg_attach_children().
storage/myisammrg/myrg_open.c:
  Changed myrg_attach_children() so that the 
  rec_per_key_part buffer is reused only when the child table
  have not changed, and reallocated otherwise (the old buffer 
  is deallocated if necessary).

Detailed revision comments:

r5440 | vasil | 2009-06-30 13:04:29 +0300 (Tue, 30 Jun 2009) | 8 lines
branches/5.1:

Fix Bug#45814 URL reference in InnoDB server errors needs adjusting to match documentation

by changing the URL from
http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html to
http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting-datadict.html

BUG#45749 - Race condition in SET GLOBAL innodb_commit_concurrency=DEFAULT

Detailed revision comments:

r5419 | marko | 2009-06-25 16:11:57 +0300 (Thu, 25 Jun 2009) | 18 lines
branches/5.1: Merge r5418 from branches/zip:

  ------------------------------------------------------------------------
  r5418 | marko | 2009-06-25 15:55:52 +0300 (Thu, 25 Jun 2009) | 5 lines
  Changed paths:
     M /branches/zip/ChangeLog
     M /branches/zip/handler/ha_innodb.cc
     M /branches/zip/mysql-test/innodb_bug42101-nonzero.result
     M /branches/zip/mysql-test/innodb_bug42101-nonzero.test
     M /branches/zip/mysql-test/innodb_bug42101.result
     M /branches/zip/mysql-test/innodb_bug42101.test
  
  branches/zip: Fix a race condition caused by
  SET GLOBAL innodb_commit_concurrency=DEFAULT. (Bug #45749)
  When innodb_commit_concurrency is initially set nonzero,
  DEFAULT would change it back to 0, triggering Bug #42101.
  rb://139 approved by Heikki Tuuri.
  ------------------------------------------------------------------------

1. Fixes build warnings caused by applying snapshot 5.1-ss5282

2. Fix the Makefile.am in storage/innobase to remove the header file
   'fsp0types.h' which was added twice to fix build warning generated 
   after applying the 5.1-ss5282 snapshot

Detailed revision comments:

r5410 | marko | 2009-06-24 22:26:34 +0300 (Wed, 24 Jun 2009) | 2 lines
branches/5.1: Add missing #include "mtr0log.h" to avoid warnings
when compiling with -DUNIV_MUST_NOT_INLINE.

unnecessarily
      
The problem is that libmysqlclient.so is built with THREAD
undefined, while a client compiling against the same header
files will see THREAD as defined and definitions in
my_pthread.h will be included, possibly resulting in undefined
symbols that cannot be resolved with libmysqlclient.so.
      
The suggested solution is to require that clients wanting to
link with libmysqlclient.so should be built with
MYSQL_CLIENT_NO_THREADS defined. This requires a documentation
change, and more details for this will be supplied if this
patch is approved.
      
The MYSQL_CLIENT_NO_THREADS define was renamed from
UNDEF_THREADS_HACK, to get a more suitable (less suspicious)
name for the define. (The UNDEF_THREADS_HACK is retained for
backwards compatibility, though.)
      
This patch is also in anticipation of WL#4958, which will
remove this problem altogether by dropping the building of
libmysqlclient.

Item_field::fix_fields()

Added code to the .test file to skip this test on Win64 for PB2 stability.
Please remove this code when the bug is fixed.

use partial primary key if another index can prevent filesort

The fix for bug #28404 causes the covering ordering indexes to be 
preferred unconditionally over non-covering and ref indexes.

Fixed by comparing the cost of using a covering index to the cost of
using a ref index even for covering ordering indexes.
Added an assertion to clarify the condition the local variables should
be in.

mysql-test/include/mix1.inc:
  Bug #36259: fixed a non-stable test case
mysql-test/r/innodb_mysql.result:
  Bug #36259 and #45828 : test case
mysql-test/t/innodb_mysql.test:
  Bug #36259 and #45828 : test case
sql/sql_select.cc:
  Bug #36259 and #45828 : don't consider covering indexes supperior to
  ref keys.

purge_relay_logs() did not propagate an error happend in count_relay_log_space().

Fixed with the suggestesd setting the error= true.
Note, propagation generally out of purge_relay_logs() was fixed for Bug #44179,
and the issue does not exist in 6.0 thanks to a patch for WL#2775.



sql/rpl_rli.cc:
  the error is set on if count_relay_log_space(rli) fails.

Based upon patch contributed by Stewart Smith

mysql-test/lib/My/SafeProcess/safe_process.cc:
  Fix style -- remove unneeded spaces.
  Specify C linkage for the signal handling functions.
  Check return value from read()/write().

the auto_increment value
      
This is an alternative patch that instead of allowing RECREATE TABLE
on TRUNCATE TABLE it implements reset_auto_increment that is called
after delete_all_rows.

Note: this bug was fixed by Mattias Jonsson:
Pusing this patch: http://lists.mysql.com/commits/70370


mysql-test/suite/parts/r/partition_auto_increment_memory.result:
  Bug#35111: Truncate a MyISAM partitioned table does not reset
  the auto_increment value
mysql-test/suite/parts/r/partition_auto_increment_myisam.result:
  Bug#35111: Truncate a MyISAM partitioned table does not reset
  the auto_increment value
sql/ha_partition.cc:
  Bug#35111: Truncate a MyISAM partitioned table does not reset
  the auto_increment value
  
  Added reset_auto_increment, to be used after delete_all_rows
  to simulate truncate.
storage/heap/ha_heap.cc:
  Bug#35111: Truncate a MyISAM partitioned table does not reset
  the auto_increment value
  
  Added reset_auto_increment, to be used after delete_all_rows
  to simulate truncate
storage/heap/ha_heap.h:
  Bug#35111: Truncate a MyISAM partitioned table does not reset
  the auto_increment value
  
  Added reset_auto_increment, to be used after delete_all_rows
  to simulate truncate
storage/myisam/ha_myisam.cc:
  Bug#35111: Truncate a MyISAM partitioned table does not reset
  the auto_increment value
  
  Added reset_auto_increment, to be used after delete_all_rows
  to simulate truncate.
storage/myisam/ha_myisam.h:
  Bug#35111: Truncate a MyISAM partitioned table does not reset
  the auto_increment value
  
  Added reset_auto_increment, to be used after delete_all_rows
  to simulate truncate.

With ibmdb2i_create_index_option set to 1, creating an IBMDB2I table
with a primary key should produce an additional index that uses EBCDIC
hexadecimal sorting. However, this does not work. Adding indexes that
are not primary keys does work. The ibmdb2i_create_index_option should
be honoured when creating a table with a primary key.

This patch adds code to the create() function to check for the value
of the ibmdb2i_create_index_option variable and, when appropriate, to 
generate a *HEX-based shadow index in DB2 for the primary key. Previously 
this behavior was limited to secondary indexes.

Additionally, this patch restricts the creation of shadow indexes to
cases in which a non-*HEX sort sequence is used, as the documentation
for ibmdb2i_create_index_option describes. Previously, the shadow index
would in some cases be created even when the MySQL-specific index used
*HEX sorting, leading to redundant indexes.

Finally, the code used to generate the list of fields for indexes 
and the code used to generate the SQL statement for the shadow
indexes has been refactored into individual functions.

mysql-test/suite/ibmdb2i/r/ibmdb2i_bug_45983.result:
  Bug#45983 ibmdb2i_create_index_option=1 not working for primary key
  
  Result file for the test case.
mysql-test/suite/ibmdb2i/t/ibmdb2i_bug_45983.test:
  Bug#45983 ibmdb2i_create_index_option=1 not working for primary key
  
  Add tests to verify that the ibmdb2i_create_index_option is being honoured
  when creating a table with a primary key.
storage/ibmdb2i/ha_ibmdb2i.cc:
  Bug#45983 ibmdb2i_create_index_option=1 not working for primary key
  
  - Add code to the create() function to check for the value of the
    ibmdb2i_create_index_option variable and, when appropriate, to 
    generate a *HEX-based shadow index in DB2 for the primary key.
  
  - Restrict the creation of shadow indexes to cases in which a
    non-*HEX sort sequence is used.
  
  - Refractor code used to generate the list of fields for indexes
    and the code used to generate the SQL statement for the shadow
    indexes into individual functions.
storage/ibmdb2i/ha_ibmdb2i.h:
  Bug#45983 ibmdb2i_create_index_option=1 not working for primary key
  
  Add function prototypes for the functions that.
  
  - Generate the list of fields for indexes
  - Generate the SQL statement for the shadow
    indexes