BUG#34790 - 'create server' doesn't handle out of memory scenario
            well enough

This is an addition to fixes for these bugs, which makes gcov
happy.

            if binlog_format=mixed

Addition to fix for BUG#34768: fixed test case failures discovered
by pushbuild.

into  mysql.com:/home/svoj/devel/mysql/push/mysql-5.1-engines

into  mysql.com:/home/svoj/devel/mysql/push/mysql-5.1-engines

into  mysql.com:/home/svoj/devel/mysql/push/mysql-5.1-engines

into  mysql.com:/home/svoj/devel/mysql/push/mysql-5.1-engines

into  mysql.com:/home/svoj/devel/mysql/BUG34768/mysql-5.1-engines

            correctly - crashes server !

Creating federated table with connect string containing empty
(zero-length) host name and port is evaluated as 0 (port is
incorrect, omitted or 0) crashes server.

This happens because federated calls strcmp() with NULL pointer.

Fixed by avoiding strcmp() call if hostname is set to NULL.

When CREATE SERVER is issued, it allocates memory on memory root
to store cached server structure. When DROP SERVER is issued,
it doesn't release this memory, as it is impossible with the
memory root.

We use the same allocation strategy for plugins and acl. The problem
here that there was no way (except for the server restart) to force
'servers' code to release this memory.

With this fix it is possible to release unused server cache memory
by FLUSH PRIVILEGES.

No test case for this fix.

            well enough

CREATE SERVER may cause server crash if there is not enough memory
to execute this operation.

Fixed that create_server() and prepare_server_struct_for_insert()
didn't check return value of functions that allocate memory.

As this is out of memory issue fix, not test case available.

            binlog_format=mixed

Statement-based replication of DELETE ... LIMIT, UPDATE ... LIMIT,
INSERT ... SELECT ... LIMIT is not safe as order of rows is not
defined.

With this fix, we issue a warning that this statement is not safe to
replicate in statement mode, or go to row-based mode in mixed mode.

Note that we may consider a statement as safe if ORDER BY primary_key
is present. However it may confuse users to see very similiar statements
replicated differently.

Note 2: regular UPDATE statement (w/o LIMIT) is unsafe as well, but
this patch doesn't address this issue. See comment from Kristian
posted 18 Mar 10:55.

into  mysql.com:/home/svoj/devel/mysql/cov/mysql-5.1-engines

Have changed the DATA/INDEX dir to not be a database dir.
(and made some changes for better result files.)

Updated the test due to bug 32167

Corrected spelling of error message

into -engines tree.

hander::table_share was not updated after changing table->s.

into  pcg5ppc.xiphis.org:/Network/Servers/anubis.xiphis.org/home/antony/work/merge.20080307/mysql-5.1

into  pcg5ppc.xiphis.org:/Network/Servers/anubis.xiphis.org/home/antony/work/merge.20080307/mysql-5.0

After merge fix.

into  pcg5ppc.xiphis.org:/Network/Servers/anubis.xiphis.org/home/antony/work/merge.20080307/mysql-5.1

into  pcg5ppc.xiphis.org:/Network/Servers/anubis.xiphis.org/home/antony/work/merge.20080307/mysql-5.0

Merge pcg5ppc.xiphis.org:/Network/Servers/anubis.xiphis.org/home/antony/work/merge.20080307/mysql-5.0
into  pcg5ppc.xiphis.org:/Network/Servers/anubis.xiphis.org/home/antony/work/merge.20080307/mysql-5.1

into  pcg5ppc.xiphis.org:/Network/Servers/anubis.xiphis.org/home/antony/work/merge.20080307/mysql-5.1

into  pcg5ppc.xiphis.org:/Network/Servers/anubis.xiphis.org/home/antony/work/merge.20080307/mysql-5.0

into  mysql.com:/home/svoj/devel/mysql/BUG28248/mysql-5.1-engines

into  mysql.com:/home/svoj/devel/mysql/BUG28248/mysql-5.0-engines

When there are no underlying tables specified for a merge table,
SHOW CREATE TABLE outputs a statement that cannot be executed. The
same is true for mysqldump (it generates dumps that cannot be
executed).

This happens because SQL parser does not accept empty UNION() clause.

This patch changes the following:
- it is now possible to execute CREATE/ALTER statement with
  empty UNION() clause.
- the same as above, but still worth noting: it is now possible to
  remove underlying tables mapping using ALTER TABLE ... UNION=().
- SHOW CREATE TABLE does not output UNION() clause if there are
  no underlying tables specified for a merge table. This makes
  mysqldump slightly smaller.

into  mysql.com:/home/svoj/devel/mysql/BUG13861/mysql-5.1-engines

            log-slave-updates and circul repl

This is a test case fix for BUG#13861.

into  kaamos.(none):/data/src/opt/mysql-5.1-opt

  
Disable test case for bug 29948, which is causing sporadically
failures in other tests inside mysql_client_test.

bug12713.

into  kaamos.(none):/data/src/opt/mysql-5.1-opt

into  kaamos.(none):/data/src/opt/mysql-5.1-opt

into  kaamos.(none):/data/src/opt/mysql-5.1-opt