cause ROLLBACK of statement", part 1. Review fixes.

Do not send OK/EOF packets to the client until we reached the end of 
the current statement.
This is a consolidation, to keep the functionality that is shared by all 
SQL statements in one place in the server.
Currently this functionality includes:
- close_thread_tables()
- log_slow_statement().

After this patch and the subsequent patch for Bug#12713, it shall also include:
- ha_autocommit_or_rollback()
- net_end_statement()
- query_cache_end_of_result().

In future it may also include:
- mysql_reset_thd_for_next_command().

into  mysql.com:/Users/davi/mysql/mysql-5.1-runtime

Only select entries from the general_log that were issued by the current
connection.

Disable failing test case.

Disable failing test case.

into  mysql.com:/Users/davi/mysql/mysql-5.1-runtime

into  mysql.com:/Users/davi/mysql/mysql-5.1-runtime

The problem was that THD::killed was reset after a command was
read from the socket, but before it was actually handled. That lead
to a race: if another KILL statement was issued for this connection
in the middle of reading from the socket and processing a command,
THD::killed state would be cleaned.

The fix is to move this cleanup into net_send_error() function.

A sample test case exists in binlog_killed.test:
  - connection 1: start a new transaction on table t1;
  - connection 2: send query to the server (w/o waiting for the
    result) to update data in table t1 -- this query will be blocked
    since there is unfinished transaction;
  - connection 1: kill query in connection 2 and finish the transaction;
  - connection 2: get result of the previous query -- it should be
    the "query-killed" error.

This test however contains race condition, which can not be fixed
with the current protocol: there is no way to guarantee, that the
server will receive and start processing the query in connection 2
(which is intended to get blocked) before the KILL command (sent in
the connection 1) will arrive. In other words, there is no way to
ensure that the following sequence will not happen:

  - connection 1: start a new transaction on table t1;
  - connection 1: kill query in connection 2 and finish the transaction;
  - connection 2: send query to the server (w/o waiting for the
    result) to update data in table t1 -- this query will be blocked
    since there is unfinished transaction;
  - connection 2: get result of the previous query -- the query will
    succeed.

So, there is no test case for this bug, since it's impossible
to write a reliable test case under the current circumstances.

Enabling the test case.

Parser rejects valid INTERVAL() expressions when associated with
arithmetic operators. The problem is the way in which the expression
and interval grammar rules were organized caused shift/reduce conflicts.

The solution is to tweak the interval rules to avoid shift/reduce
conflicts by removing the broken interval_expr rule and explicitly
specify it's content where necessary.

Original fix by Davi Arnaut, revised and improved rules by Marc Alff

The following clarification should be made in The Manual:

Standard SQL is quite clear that, if new columns are added
to a table after a view on that table is created with
"select *", the new columns will not become part of the view.
In all cases, the view definition (view structure) is frozen
at CREATE time, so changes to the underlying tables do not
affect the view structure.

This bug is actually two bugs in one, one of which is CREATE TRIGGER under
LOCK TABLES and the other is CREATE TRIGGER under LOCK TABLES simultaneous
to a FLUSH TABLES WITH READ LOCK (global read lock). Both situations could
lead to a server crash or deadlock.

The first problem arises from the fact that when under LOCK TABLES, if the
table is in the set of locked tables, the table is already open and it doesn't
need to be reopened (not a placeholder). Also in this case, if the table is
not write locked, a exclusive lock can't be acquired because of a possible
deadlock with another thread also holding a (read) lock on the table. The
second issue arises from the fact that one should never wait for a global
read lock if it's holding any locked tables, because the global read lock
is waiting for these tables and this leads to a circular wait deadlock.

The solution for the first case is to check if the table is write locked
and upgraded the write lock to a exclusive lock and fail otherwise for non
write locked tables. Grabbin the exclusive lock in this case also means
to ensure that the table is opened only by the calling thread. The second
issue is partly fixed by not waiting for the global read lock if the thread
is holding any locked tables.

The second issue is only partly addressed in this patch because it turned
out to be much wider and also affects other DDL statements. Reported as
Bug#32395

into  lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.1-rt-merge

into  lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.1-rt-merge

into  lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.1-rt-merge

into  mysql.com:/Users/davi/mysql/mysql-5.1-runtime

into  lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.0-rt-merge

into  mysql.com:/Users/davi/mysql/mysql-5.0-runtime

Kill of a CREATE TABLE source_table LIKE statement waiting for a
name-lock on the source table causes a bad lock interaction.

The mysql_create_like_table() has a bug that if the connection is
killed while waiting for the name-lock on the source table, it will
jump to the wrong error path and try to unlock the source table and
LOCK_open, but both weren't locked.

The solution is to simple return when the name lock request is killed,
it's safe to do so because no lock was acquired and no cleanup is needed.

Original bug report also contains description of other problems
related to this scenario but they either already fixed in 5.1 or
will be addressed separately (see bug report for details).

into  stella.local:/home2/mydev/mysql-5.1-axmrg

Moved disabling to rpl suite.
Bug#32801 wait_timeout.test fails randomly
Disabled test case.

Disabled test case.

into  adventure.(none):/home/thek/Development/cpp/mysql-5.1-runtime

into  stella.local:/home2/mydev/mysql-5.1-axmrg

into  stella.local:/home2/mydev/mysql-5.1-axmrg

into  stella.local:/home2/mydev/mysql-5.0-axmrg

into  stella.local:/home2/mydev/mysql-5.0-axmrg

Disabled the test case.

into  mysql.com:/home/ram/work/b30495/b30495.5.0

into  lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.1-rt-merge

into  mysql.com:/home/ram/work/b30495/b30495.5.1

into  lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.0-rt-merge

into  stella.local:/home2/mydev/mysql-5.0-axmrg

into  mysql.com:/home/ram/work/b30495/b30495.5.0

  - archive test/result adjusted.
  - OPTIMIZE/ANALYZE PARTITION EXTENDED test case added.

Some test cases were missing preparation to deal with failed
predecessor test cases.

Added preparation (drop table if exists) to some test cases.