INDEX_READ_MAP HAD NO MATCH

If index_read_map is called for exact search and no matching records
exists it will position the cursor on the next record, but still having the
relative position to BTR_PCUR_ON.
This will make a call for index_next to read yet another next record,
instead of returning the record the cursor points to.

Fixed by setting pcur->rel_pos = BTR_PCUR_BEFORE if an exact
[prefix] search is done, but failed.

Also avoids optimistic restoration if rel_pos != BTR_PCUR_ON,
since btr_cur may be different than old_rec.

rb#3324, approved by Marko and Jimmy

As this mysql_install_db.pl file has always generated lots of confusion on Windows.  This fix will make sure to get it removed only from Windows

      Registry redirection was improper and hence not able to pick the value for the OLDERVERSION property. as a result in the install upgrade dialog null value wa being passed.

log_buffer_extend() should fill the new buffer with 0.

Changed to try to extend log buffer instead of crash, when log size is too large for the size.

Approved by Marko in rb#3229

The testcase for this bug fails randomly due to two reasons.
1. Due to ibuf merge happening background
2. Due to dict stats update which brings the evicted page back into
   buffer pool.

Fix ibuf_contract_ext() to not do any merges with ibuf_debug enabled and
also changed dict_stats_update() to return fake statistics without
bringing the secondary index pages into buffer pool.

Approved by Marko. rb#3419

No commit message

              DURING INNODB RECOVERY

Problem:
=======
The connection 'master' is dropped by mysqltest after
rpl_end.inc. At this point, dropping temporary tables
at the connection 'master' are not synced at slave.
So, the temporary tables replicated from master remain
on slave leading to an inconsistent close of the test.
The following test thus complains about the presence of
temporary table(s) left over from the previous test.

Fix:
===
- Put explicit drop commands in replication tests so
  that the temporary tables are dropped at slave as well.
- Added the check for Slave_open_temp_tables in
  mtr_check.sql to warn about the remaining temporary
  table, if any, at the close of a test.

RPL_SEMI_SYNC_MASTER_ENABLED OFF.

Problem:
=======
If master is waiting for a reply from slave, at this time
set global rpl_semi_sync_master_enabled=OFF, the master
server will crash.

Analysis:
========
When master is waiting for a reply from slave, at this time
if semi sync is switched off on master, during switch off if
active transactions are present the transactions will be
cleared and "active_tranxs_" variable will be set to NULL.

When the waiting master connection finds that semi sync is
switched of it tries to access "active_tranxs_" without
checking if the transaction list exists or not. Accessing
NULL transaction list causes the crash.

Fix:
===
A check has been added to see a valid list exists before
accessing the "active_tranxs_".

plugin/semisync/semisync_master.cc:
  Added check for the existence of valid 'active_transx_'.

Tested with:
gcc (GCC) 4.8.1 20130603 (Red Hat 4.8.1-1)

clang version 3.1 (tags/RELEASE_31/final)
Target: x86_64-apple-darwin10.8.0

  
my_strnxfrm_win1250ch could write into dest[destlen]
i.e. write a byte to the past-the-end of dest.

test change only.

Removed --source include/not_windows_embedded.inc
which was added due to that bug.

disable testcase due to BUG#17446090

	       IT IS DONE IN-PLACE

With change buffer enabled, InnoDB doesn't write a transaction log
record when it merges a record from the insert buffer to an secondary
index page if the insertion is performed as an update-in-place.

Fixed by logging the 'update-in-place' operation on secondary index
pages.

Approved by Marko. rb#2429

                WITH MY_B_VPRINTF()
Issue         : In LP 64 machine max long value can be 20 digit
                decimal value. But in my_b_vprintf() the intermediate
                buffer storage used is 17 bytes length. This will lead to
                buffer overflow.
Solution      : Increased the buffer storage from 17 to 32 bytes.
                code is backported from 5.6


mysys/mf_iocache2.c:
  In function my_b_vprintf increased the size of local buff from 17 to
  32 bytes.

For queries like
update t1 set ... where <unique key> order by ... limit ...
we need to handle the fact that unique keys allow NULL
values, and hence can return more than one row.


sql/opt_range.cc:
  When the unique key has multiple key parts,
  check each key_part for nullability, rather than the first key part.
  (s/key->part ==/key_tree->part ==/)
  
  Also: revert the if() test, for better readability.

                WITH MY_B_VPRINTF()

[Merge from 5.1]

Postfix, suppress the new warning generated by the bug's fix.

Dump thread may encounter an error when reading events from the active binlog
file. However the errors may be temporary, so dump thread will try to read
the event again. But dump thread seeked to an wrong position, it caused some
events was sent twice.

To fix the bug, prev_pos is defined out the while loop and is set the correct
position after reading every event correctly.

This patch also make binlog_can_be_corrupted more accurate, only the binlogs
not closed normally are marked binlog_can_be_corrupted.

Finally, two warnings are added when dump threads encounter the temporary
errors.

 Reverted the changes to spec file to ignore mysqld_safe.pid file, updated the logic to get the correct count of PID files

Merging from 5.1 to 5.5

      
Reverting the patch. Because this change is not to me made for GA versions.

Reverting the patch. Because this change is not to me made for GA versions.

Do not call abs(INT_MIN) as the result is undefined.

Add missing initialization in lex_start()

              FILES SPECIFIED WITH THE BASEDIR OPTION

Reverting the patch. Because asked for second review.