The problem was that the events_bugs test could randomly fail due to
races in the test case.

The solution is to replace fixed sleeps with reliable polling of a
certain state to settle.  For that, a new auxiliary script
include/wait_condition.inc is used, that allows waiting for a given
query to return true.

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.0-runtime-debug-max

by the patch for Bug#4968

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.0-runtime

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  mockturtle.local:/home/dlenev/src/mysql-5.0-bg20390-2

into  mockturtle.local:/home/dlenev/src/mysql-5.1-bg20390

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-6298

into  bodhi.local:/opt/local/work/mysql-5.1-root

into  bodhi.local:/opt/local/work/mysql-5.0-runtime

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.0-runtime

into  trift2.:/MySQL/M50/push-5.0

into  mockturtle.local:/home/dlenev/src/mysql-5.1-bg20390

into  mockturtle.local:/home/dlenev/src/mysql-5.0-bg20390-2

into  bodhi.local:/opt/local/work/mysql-5.0-4968-to-push

into  bodhi.local:/opt/local/work/mysql-4.1-4968-to-push

into  bodhi.local:/opt/local/work/mysql-5.1-4968-null-merge

into  mockturtle.local:/home/dlenev/src/mysql-5.1-bg20390

into  mysql.com:/home/kent/bk/tmp2/mysql-5.1-build

of untouched rows in full table scans".

SELECT ... FOR UPDATE/LOCK IN SHARE MODE statements as well as
UPDATE/DELETE statements which were executed using full table
scan were not releasing locks on rows which didn't satisfy
WHERE condition.
This bug surfaced in 5.0 and affected NDB tables. (InnoDB tables
intentionally don't support such unlocking in default mode).

This problem occured because code implementing join didn't call
handler::unlock_row() for rows which didn't satisfy part of condition
attached to this particular table/level of nested loop. So we solve
the problem adding this call.
Note that we already had this call in place in 4.1 but it was lost
(actually not quite correctly placed) when we have introduced nested 
joins.

Also note that additional QA should be requested once this patch is
pushed as interaction between handler::unlock_row() and many recent
MySQL features such as subqueries, unions, views is not tested enough.

into  mysql.com:/home/kent/bk/tmp2/mysql-5.1-build

into  trift2.:/MySQL/M51/tmp-5.1

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.0-runtime

into  bodhi.local:/opt/local/work/mysql-5.0-runtime

into  trift2.:/MySQL/M50/push-5.0