on index

'my_decimal' class has two members which can be used to access the 
value. The member variable buf (inherited from parent class decimal_t) 
is set to member variable buffer so that both are pointing to same value.

Item_copy_decimal::copy() uses memcpy to clone 'my_decimal'. The member
buffer is declared as an array and memcpy results in copying the values
of the array, but the inherited member buf, which should be pointing at
the begining of the array 'buffer' starts pointing to the begining of 
buffer in original object (which is being cloned). Further updates on 
'my_decimal' updates only the inherited member 'buf' but leaves 
buffer unchanged.

Later when the new object (which now holds a inconsistent value) is cloned
again using proper cloning function 'my_decimal2decimal' the buf pointer
is fixed resulting in loss of the current value.

Using my_decimal2decimal instead of memcpy in Item_copy_decimal::copy()
fixed this problem.


mysql-test/r/subselect.result:
  Updated result file after addding test case for bug#47904.
mysql-test/t/subselect.test:
  Added test case for bug#47904.
sql/item.cc:
  Memcopy shouldn't be used to clone my_decimal. Use my_decimal2decimal
  instead.

            data and index files

It was possible if DATA/INDEX DIRECTORY is pointing to
symlinked MySQL data home directory.

Do not allow to drop data/index files implicitly symlinked
to data home directory. For such tables remove symlink only.

mysql-test/r/symlink.result:
  A test case for BUG#40980.
mysql-test/t/symlink.test:
  A test case for BUG#40980.
storage/myisam/mi_delete_table.c:
  Do not allow to drop data/index files implicitly symlinked
  to data home directory. For such tables remove symlink only.

Detailed revision comments:

r6900 | mmakela | 2010-03-29 13:54:57 +0300 (Mon, 29 Mar 2010) | 5 lines
branches/zip: Merge c6899 from branches/innodb+:

Add debug assertions to track down Bug #52360.
hash_table_t::magic_n: Add HASH_TABLE_MAGIC_N checks, which were fully absent.
ut_hash_ulint(): Assert table_size > 0 before division.

Detailed revision comments:

r6897 | mmakela | 2010-03-29 11:36:19 +0300 (Mon, 29 Mar 2010) | 3 lines
branches/zip: innodb_mutex_show_status(): Fix a condition
that was accidentally negated in r6781, making SHOW ENGINE INNODB MUTEX STATUS
display only locks with no OS waits.

Detailed revision comments:

r6891 | vdimov | 2010-03-26 16:19:01 +0200 (Fri, 26 Mar 2010) | 5 lines
Non-functional change: update copyright year to 2010 of the files
that have been modified after 2010-01-01 according to svn.

for f in $(svn log -v -r{2010-01-01}:HEAD |grep "^   M " |cut -b 16- |sort -u) ; do sed -i "" -E 's/(Copyright \(c\) [0-9]{4},) [0-9]{4}, (.*Innobase Oy.+All Rights Reserved)/\1 2010, \2/' $f ; done

Detailed revision comments:

r6875 | vdimov | 2010-03-25 18:18:15 +0200 (Thu, 25 Mar 2010) | 4 lines
branches/zip:

Wrap line at 78 column in ChangeLog.

Detailed revision comments:

r6874 | vdimov | 2010-03-25 17:17:52 +0200 (Thu, 25 Mar 2010) | 4 lines
branches/zip:

Wrap ChangeLog at 78th column

Detailed revision comments:

r6873 | vdimov | 2010-03-25 17:06:56 +0200 (Thu, 25 Mar 2010) | 4 lines
branches/zip:

Use Bug#N instead of Bug #N to be consistent with the rest of the fil.

Detailed revision comments:

r6872 | vdimov | 2010-03-25 17:03:17 +0200 (Thu, 25 Mar 2010) | 4 lines
branches/zip:

Fix ChangeLog - write only the bug title in bugs.mysql.com-related entires.

Detailed revision comments:

r6871 | vdimov | 2010-03-25 16:39:44 +0200 (Thu, 25 Mar 2010) | 4 lines
branches/zip:

Whitespace fixup to be consistent with the rest of the file.

Detailed revision comments:

r6868 | mmakela | 2010-03-25 13:03:08 +0200 (Thu, 25 Mar 2010) | 1 line
branches/zip: page_validate(): Check the buf[] bounds.

Detailed revision comments:

r6864 | mmakela | 2010-03-24 14:05:53 +0200 (Wed, 24 Mar 2010) | 1 line
branches/zip: dtype_new_store_for_order_and_null_size(): Add ut_ad() on mtype.

Detailed revision comments:

r6861 | vdimov | 2010-03-23 19:31:02 +0200 (Tue, 23 Mar 2010) | 36 lines
branches/zip:

Merge joerg@mysql.com-20100322150231-vdq0afbqtmbs6phy from BZR,

Including univ.i before mysql/plugin.h is needed to avoid this
compiler error:

o  This is how gcc puts it:
o  > > ccache /usr/local/gcc-4.3.2/bin/gcc -static-libgcc -DHAVE_CONFIG_H -I. -I../../include -I../../include -I../../include -I../../regex -I./include -I../../sql -I. -I../../zlib    -g -O3 -march=i686   -DUNIV_LINUX -MT libinnobase_a-trx0i_s.o -MD -MP -MF .deps/libinnobase_a-trx0i_s.Tpo -c -o libinnobase_a-trx0i_s.o `test -f 'trx/trx0i_s.c' || echo './'`trx/trx0i_s.c
o  > > In file included from ./include/univ.i:114,
o  > >                  from trx/trx0i_s.c:36:
o  > > ../../include/my_pthread.h:628: error: expected ')' before '*' token
o  > > In file included from ../../include/my_pthread.h:732,
o  > >                  from ./include/univ.i:114,
o  > >                  from trx/trx0i_s.c:36:
o  > > ../../include/mysql/psi/mysql_thread.h:100: error: expected specifier-qualifier-list before 'pthread_rwlock_t'
o  > > ../../include/mysql/psi/mysql_thread.h:116: error: expected specifier-qualifier-list before 'pthread_rwlock_t'
o  > > ../../include/mysql/psi/mysql_thread.h: In function 'inline_mysql_rwlock_init':
o  > > ../../include/mysql/psi/mysql_thread.h:711: error: 'mysql_rwlock_t' has no member named 'm_psi'
o  > > ../../include/mysql/psi/mysql_thread.h:716: error: 'mysql_rwlock_t' has no member named 'm_rwlock'
o  > > .... ((continued))
o  
o  Intel's icc gives slightly clearer messages:
o  > > icc -static-intel -static-libgcc -DHAVE_CONFIG_H -I. -I../../include -I../../include -I../../include -I../../regex -I./include -I../../sql -I. -I../../zlib    -O3 -g -unroll2 -ip -mp -restrict -no-ftz -no-prefetch   -DUNIV_LINUX -MT libinnobase_a-trx0i_s.o -MD -MP -MF .deps/libinnobase_a-trx0i_s.Tpo -c -o libinnobase_a-trx0i_s.o `test -f 'trx/trx0i_s.c' || echo './'`trx/trx0i_s.c
o  > > ../../include/my_pthread.h(628): error: identifier "pthread_rwlock_t" is undefined
o  > >   extern int rw_pr_init(rw_pr_lock_t *);
o  > >                         ^
o  > > 
o  > > ../../include/mysql/psi/mysql_thread.h(100): error: identifier "pthread_rwlock_t" is undefined
o  > >     rw_lock_t m_rwlock;
o  > >     ^
o  > > 
o  > > ../../include/mysql/psi/mysql_thread.h(116): error: identifier "pthread_rwlock_t" is undefined
o  > >     rw_pr_lock_t m_prlock;
o  > >     ^

Detailed revision comments:

r6860 | jyang | 2010-03-23 18:20:36 +0200 (Tue, 23 Mar 2010) | 5 lines
branches/zip: This is patch from Inaam that uses red-black tree
to speed up insertions into the flush_list and thus the recovery
process. The patch has been tested by Nokia.

Detailed revision comments:

r6858 | mmakela | 2010-03-23 14:09:24 +0200 (Tue, 23 Mar 2010) | 1 line
branches/zip: innodb_read_ahead_threshold: Add missing space to help string.

Detailed revision comments:

r6857 | mmakela | 2010-03-23 14:07:53 +0200 (Tue, 23 Mar 2010) | 1 line
branches/zip: innodb_change_buffering: Correct the documentation.

Detailed revision comments:

r6853 | marko | 2010-03-22 13:35:29 +0200 (Mon, 22 Mar 2010) | 1 line
branches/zip: mutex_own(), rw_lock_own(): Add attribute((warn_unused_result)).

Detailed revision comments:

r6840 | calvin | 2010-03-19 00:32:23 +0200 (Fri, 19 Mar 2010) | 6 lines
branches/zip: Fix Bug #52102 InnoDB Plugin shows performance drop
comparing to builtin InnoDB (Windows only).

Disable Windows atomics by default.

Approved by: Inaam

Detailed revision comments:

r6830 | marko | 2010-03-18 09:48:18 +0200 (Thu, 18 Mar 2010) | 3 lines
branches/zip: buf_page_peek_if_too_old(): Use 32-bit arithmetics
when comparing the age of access_time to buf_LRU_old_threshold_ms.
This fixes a bug on 64-bit systems.

Detailed revision comments:

r6828 | calvin | 2010-03-17 17:16:38 +0200 (Wed, 17 Mar 2010) | 7 lines
branches/zip: rename IB_HAVE_PAUSE_INSTRUCTION to
HAVE_IB_PAUSE_INSTRUCTION in CMakeLists.txt.

The rename was done as r5871, but CMakeLists.txt was
forgotten. Also, add INNODB_RW_LOCKS_USE_ATOMICS to
CMake.

Detailed revision comments:

r6805 | inaam | 2010-03-11 23:15:17 +0200 (Thu, 11 Mar 2010) | 6 lines
branches/zip issue#463

Fixed compiler warning about uninitialized variable.

Non-functional change.

Detailed revision comments:

r6801 | marko | 2010-03-11 13:34:28 +0200 (Thu, 11 Mar 2010) | 2 lines
branches/zip: mtr_memo_contains(): Relax the assertion of r6800,
allowing mtr->state == MTR_COMMITTING.

Detailed revision comments:

r6800 | marko | 2010-03-11 12:02:57 +0200 (Thu, 11 Mar 2010) | 1 line
branches/zip: Add ut_ad(mtr->state == MTR_ACTIVE) to various places.

Detailed revision comments:

r6799 | jyang | 2010-03-11 09:59:42 +0200 (Thu, 11 Mar 2010) | 5 lines
branches/zip: Once change in bug #47621 merges into zip branch,
zip only test innodb_bug44571 needs to be updated to reflect the
column name change would be successful be done in InnoDB as well.

Detailed revision comments:

r6798 | marko | 2010-03-11 09:53:01 +0200 (Thu, 11 Mar 2010) | 14 lines
branches/zip: Fix and clarify the latching of some buf_block_t members.

buf_block_t::check_index_page_at_flush: Note that this field is not
protected by any mutex. Make it a separate field, not a bitfield that
could share the machine word with other fields.

buf_block_t::lock_hash_val: Note that this field is protected by
buf_block_t::lock (or during block creation, by buf_pool_mutex and
buf_block_t::mutex).

buf_block_get_lock_hash_val(): Assert that block->lock is held by the
current thread.

Issue #465, rb://267 approved by Inaam Rana

Detailed revision comments:

r6792 | marko | 2010-03-10 13:56:41 +0200 (Wed, 10 Mar 2010) | 1 line
branches/zip: Copy tests from branches/5.1 that were lost in some merge.
r6793 | marko | 2010-03-10 14:02:19 +0200 (Wed, 10 Mar 2010) | 60 lines
branches/zip: Merge revisions 6669:6788 from branches/5.1:

  ------------------------------------------------------------------------
  r6774 | calvin | 2010-03-03 23:56:10 +0200 (Wed, 03 Mar 2010) | 2 lines
  Changed paths:
     M /branches/5.1/trx/trx0sys.c

  branches/5.1: fix bug#51653: outdated reference to set-variable
  Non functional change.
  ------------------------------------------------------------------------
  r6780 | vasil | 2010-03-08 19:13:20 +0200 (Mon, 08 Mar 2010) | 4 lines
  Changed paths:
     M /branches/5.1/plug.in

  branches/5.1:

  Whitespace fixup.
  ------------------------------------------------------------------------
  r6783 | jyang | 2010-03-09 17:54:14 +0200 (Tue, 09 Mar 2010) | 9 lines
  Changed paths:
     M /branches/5.1/handler/ha_innodb.cc
     M /branches/5.1/mysql-test/innodb_bug21704.result
     A /branches/5.1/mysql-test/innodb_bug47621.result
     A /branches/5.1/mysql-test/innodb_bug47621.test

  branches/5.1: Fix bug #47621 "MySQL and InnoDB data dictionaries
  will become out of sync when renaming columns". MySQL does not
  provide new column name information to storage engine to
  update the system table. To avoid column name mismatch, we shall
  just request a table copy for now.

  rb://246 approved by Marko.
  ------------------------------------------------------------------------
  r6785 | vasil | 2010-03-10 09:04:38 +0200 (Wed, 10 Mar 2010) | 11 lines
  Changed paths:
     M /branches/5.1/mysql-test/innodb_bug38231.test

  branches/5.1:

  Add the missing --reap statements in innodb_bug38231.test. Probably MySQL
  enforced the presence of those recently and the test started failing like:

    main.innodb_bug38231                     [ fail ]
            Test ended at 2010-03-10 08:48:32

    CURRENT_TEST: main.innodb_bug38231
    mysqltest: At line 49: Cannot run query on connection between send and reap
  ------------------------------------------------------------------------
  r6788 | vasil | 2010-03-10 10:53:21 +0200 (Wed, 10 Mar 2010) | 8 lines
  Changed paths:
     M /branches/5.1/mysql-test/innodb_bug38231.test

  branches/5.1:

  In innodb_bug38231.test: replace the fragile sleep 0.2 that depends on timing
  with a more robust condition which waits for the TRUNCATE and LOCK commands
  to appear in information_schema.processlist. This could also break if there
  are other sessions executing the same SQL commands, but there are none during
  the execution of the mysql test.
  ------------------------------------------------------------------------

Detailed revision comments:

r6791 | marko | 2010-03-10 13:39:06 +0200 (Wed, 10 Mar 2010) | 1 line
branches/zip: Add ChangeLog entries for r6789, r6790.

Detailed revision comments:

r6790 | jyang | 2010-03-10 13:09:41 +0200 (Wed, 10 Mar 2010) | 7 lines
branches/zip: Fix bug #51356: "many valgrind errors in error messages
with concurrent ddl". Null terminate the name string returned
from innobase_convert_identifier() call when reporting DB_DUPLICATE_KEY
error in create_table_def().
rb://266 approved by Marko

Detailed revision comments:

r6789 | jyang | 2010-03-10 11:18:18 +0200 (Wed, 10 Mar 2010) | 10 lines
branches/zip: If a unique index is on a column prefix, such
unique index cannot be upgrade to primary index even if there
is no primary index already defined. Also fix possible corruption
when initialize "ref_length" value in case there is a mismatch
between MySQL and InnoDB primary key. Fix bug #51378: "Init
'ref_length'  to correct value, in case an out of bound MySQL
primary_key".
rb://262 approved by Marko.

Detailed revision comments:

r6787 | marko | 2010-03-10 10:35:06 +0200 (Wed, 10 Mar 2010) | 10 lines
branches/zip: recv_parse_log_rec(): Remove a bogus assertion about page_no.
TODO: We might also consider removing recv_max_parsed_page_no, because
it does not make much sense with *.ibd files.

recv_report_corrupt_log(), recv_scan_log_recs(): Abort when a
corrupted log record has been found, unless innodb_force_recovery has
been set.

This fixes Issue #464.
rb://265 approved by Heikki Tuuri

Detailed revision comments:

r6786 | vasil | 2010-03-10 09:16:50 +0200 (Wed, 10 Mar 2010) | 4 lines
branches/zip:

Fix typo in comment

Detailed revision comments:

r6782 | marko | 2010-03-09 14:09:26 +0200 (Tue, 09 Mar 2010) | 1 line
branches/zip: fil0fil.c: Update comments on table->flags as of r6252.

Detailed revision comments:

r6781 | marko | 2010-03-09 09:41:08 +0200 (Tue, 09 Mar 2010) | 4 lines
branches/zip: Make SHOW ENGINE INNODB MUTEX display SUM(os_waits)
for block mutexes and blocks.

Designed by Michael and Marko. rb://188, Issue #358

Detailed revision comments:

r6779 | marko | 2010-03-08 14:35:42 +0200 (Mon, 08 Mar 2010) | 6 lines
branches/zip: Fix IMPORT TABLESPACE of compressed tables.  Previously,
a wrong parameter was passed to buf_flush_init_for_writing().

fil_reset_too_high_lsns(): Set up page_zip and use it if needed.

rb://264, Issue #352

Detailed revision comments:

r6777 | marko | 2010-03-04 13:01:25 +0200 (Thu, 04 Mar 2010) | 2 lines
branches/zip: trx_undo_update_rec_get_update(): Silence a bogus GCC warning
about a possibly uninitialized variable.

Detailed revision comments:

r6773 | marko | 2010-03-03 15:31:54 +0200 (Wed, 03 Mar 2010) | 2 lines
branches/zip: row_raw_format(): Silence a GCC 4.4.2 warning
of possibly uninitialized variable format_in_hex.

Detailed revision comments:

r6771 | marko | 2010-03-03 14:52:43 +0200 (Wed, 03 Mar 2010) | 1 line
Document r6770.

Detailed revision comments:

r6770 | marko | 2010-03-03 12:52:55 +0200 (Wed, 03 Mar 2010) | 12 lines
branches/zip: Disallow duplicate index name when creating an index.
This should fix Mantis Issue #461.

innodb.test, innodb.result, innodb-index.test, innodb-index.result:
Adjust the test result and mention that the introduced restriction
has been reported as MySQL Bug #51451.

innobase_check_index_keys(): Add a parameter for the InnoDB table and
check that no duplicate index name is added.  Report errors by
my_error() instead of sql_print_error().

rb://260 approved by Sunny Bains