The problem was in dummy grep on AIX and HPUX.

The fix is to use more portable patterns.

The patch is only for test suite
(i.e. does not touch server codebase).


mysql-test/r/im_instance_conf.result:
  Updated result file.
mysql-test/t/disabled.def:
  Fix typo.
mysql-test/t/im_instance_conf.imtest:
  Make grep-pattern aix/hpux-compatible.
mysql-test/t/im_options.imtest:
  Make grep-pattern aix/hpux-compatible.
mysql-test/t/im_options-im.opt:
  Speedup IM-tests.

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

mysql-test/lib/mtr_process.pl:
  Apply manually the merge from 5.0
mysql-test/mysql-test-run.pl:
  Apply manually the merge from 5.0
mysql-test/r/grant.result:
  A post-merge fix.
mysql-test/r/im_cmd_line.result:
  A post-merge fix.
mysql-test/r/im_instance_conf.result:
  A post-merge fix.
mysql-test/r/sp.result:
  A post-merge fix.
mysql-test/t/grant.test:
  A post-merge fix.
mysql-test/t/im_cmd_line.imtest:
  A post-merge fix.
mysql-test/t/im_instance_conf.imtest:
  A post-merge fix.
sql/field.cc:
  A post-merge fix.
sql/item_cmpfunc.cc:
  A post-merge fix.
sql/sp_head.cc:
  A post-merge fix.
sql/sp_head.h:
  A post-merge fix.

CMake versions > 2.4 allow linking to STATIC or SHARED libraries only.



libmysql/CMakeLists.txt:
  Fix for Cmake BC problems (as suggested by Elliot)

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


BitKeeper/deleted/.del-im_check_os.inc:
  Auto merged
BitKeeper/deleted/.del-im_options_set.imtest~b53d9d60e5684833:
  Auto merged
BitKeeper/deleted/.del-im_options_set.result~59278f56be61d921:
  Auto merged
BitKeeper/deleted/.del-im_options_unset.imtest~768eb186b51d0048:
  Auto merged
configure.in:
  Auto merged
BitKeeper/deleted/.del-im_options_unset.result~20a4790cd3c70a4f:
  Auto merged
include/mysql_com.h:
  Auto merged
mysql-test/lib/mtr_io.pl:
  Auto merged
mysql-test/r/im_daemon_life_cycle.result:
  Auto merged
mysql-test/r/im_life_cycle.result:
  Auto merged
mysql-test/r/im_utils.result:
  Auto merged
mysql-test/r/sp-error.result:
  Auto merged
mysql-test/r/trigger.result:
  Auto merged
mysql-test/r/type_varchar.result:
  Auto merged
mysql-test/r/view.result:
  Auto merged
mysql-test/t/im_daemon_life_cycle.imtest:
  Auto merged
mysql-test/t/im_life_cycle.imtest:
  Auto merged
mysql-test/t/im_utils.imtest:
  Auto merged
mysql-test/t/sp-error.test:
  Auto merged
mysql-test/t/trigger.test:
  Auto merged
mysql-test/t/type_varchar.test:
  Auto merged
mysql-test/t/view.test:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_row.cc:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/item_strfunc.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/net_serv.cc:
  Auto merged
sql/protocol.cc:
  Auto merged
sql/sp_head.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_cache.cc:
  Auto merged
sql/sql_cache.h:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_error.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_trigger.h:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
mysql-test/mysql-test-run.pl:
  Use local. Alik will merge his changes manually.
mysql-test/lib/mtr_process.pl:
  Use local.
mysql-test/r/grant.result:
  Use local.
mysql-test/r/sp.result:
  Use local.
mysql-test/r/ps.result:
  Manual merge.
mysql-test/t/grant.test:
  Manual merge.
mysql-test/t/ps.test:
  Manual merge.
mysql-test/t/sp.test:
  Manual merge.
sql/Makefile.am:
  Manual merge.
sql/field.cc:
  Manual merge.
sql/mysqld.cc:
  Manual merge.
sql/share/errmsg.txt:
  Manual merge.
sql/sp.cc:
  Manual merge.
sql/sp_head.h:
  Manual merge.
sql/sql_trigger.cc:
  Manual merge.
sql/sql_view.cc:
  Manual merge.

doesn't find the column"

When a user was using 4.1 tables with VARCHAR column and 5.0 server
and a query that used a temporary table to resolve itself, the
table metadata for the varchar column sent to client was incorrect:
MYSQL_FIELD::table member was empty.

The bug was caused by implicit "upgrade" from old VARCHAR to new
VARCHAR hard-coded in Field::new_field, which did not preserve
the information about the original table. Thus, the field metadata
of the "upgraded" field pointed to an auxiliary temporary table
created for query execution.

The fix is to copy the pointer to the original table to the new field.


mysql-test/r/type_varchar.result:
  Update test results (Bug#14897)
mysql-test/t/type_varchar.test:
  Add a test case for Bug#14897 "ResultSet.getString("table.column") 
  sometimes doesn't find the column"
sql/field.cc:
  Preserve the original table name when converting fields from 
  old VARCHAR to new VARCHAR.
mysql-test/std_data/14897.frm:
  New BitKeeper file ``mysql-test/std_data/14897.frm''

into  lamia.home:/home/timka/mysql/src/5.1-bug-21456


mysql-test/r/distinct.result:
  Auto merged
sql/sql_select.cc:
  Auto merged

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.0-bug17591

  - BUG#15934: Instance manager fails to work;
  - BUG#18020: IM connect problem;
  - BUG#18027: IM: Server_ID differs;
  - BUG#18033: IM: Server_ID not reported;
  - BUG#21331: Instance Manager: Connect problems in tests;

The only test suite has been changed
(server codebase has not been modified).


BitKeeper/deleted/.del-im_check_os.inc:
  Rename: mysql-test/include/im_check_os.inc -> BitKeeper/deleted/.del-im_check_os.inc
mysql-test/include/im_check_env.inc:
  Include only this file from all IM-tests.
mysql-test/lib/mtr_io.pl:
  Update mtr_get_pid_from_file() to workaround race,
  described in BUG#21884.
mysql-test/lib/mtr_process.pl:
  Refactor im_start()/im_stop() so that they will be more
  reliable. There are the following user-visible changes:
    - if one of these functions fails, the test suite
      is aborted;
    - mtr_im_stop() now determines whether the component is
      alive or not not only by checking PID, but also by trying
      to connect to the component;
    - after starting IM, the test suite waits for it to start
      accepting client connections and to start all its guarded
      mysqld instances;
    - a lot of debug-logs have been added in order to simplify
      investigation of future failures.
mysql-test/mysql-test-run.pl:
  1. Get rid of kill_and_cleanup();
  2. Move im_start()/im_stop() to mtr_process.pl;
  3. Change default IM port to 9311 so that it does not interfere
     with default slave port;
mysql-test/r/im_daemon_life_cycle.result:
  Updated result file.
mysql-test/r/im_life_cycle.result:
  Updated result file.
mysql-test/r/im_options_set.result:
  Updated result file.
mysql-test/r/im_options_unset.result:
  Updated result file.
mysql-test/r/im_utils.result:
  Updated result file.
mysql-test/t/im_daemon_life_cycle.imtest:
  Updated IM-test.
mysql-test/t/im_life_cycle.imtest:
  Updated IM-test.
mysql-test/t/im_options_set.imtest:
  Updated IM-test.
mysql-test/t/im_options_unset.imtest:
  Updated IM-test.
mysql-test/t/im_utils.imtest:
  Updated IM-test.

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.0-bug17591


mysql-test/r/view.result:
  Manual merge.
mysql-test/t/view.test:
  Manual merge.

When a view was used inside a trigger or a function, lock type for
tables used in a view was always set to READ (thus making the view
non-updatable), even if we were trying to update the view.

The solution is to set lock type properly.


mysql-test/r/view.result:
  Add result for bug#17591: Updatable view not possible with trigger
  or stored function.
mysql-test/t/view.test:
  Add test case for bug#17591: Updatable view not possible with trigger
  or stored function.
sql/sql_view.cc:
  Move the code that sets requested lock type before the point where
  we exit from mysql_make_view() when we process a placeholder for
  prelocked table.

into  zim.(none):/home/brian/mysql/arch-5.1


BUILD/compile-alpha-cxx:
  Auto merged
BUILD/compile-alpha-debug:
  Auto merged
BUILD/compile-dist:
  Auto merged
BUILD/compile-ia64-debug-max:
  Auto merged
CMakeLists.txt:
  Auto merged
client/mysql.cc:
  Auto merged
sql/handler.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/sql_plugin.cc:
  Auto merged
storage/csv/ha_tina.cc:
  Auto merged
BUILD/FINISH.sh:
  Innodbase config still needed.

into  zim.(none):/home/brian/mysql/arch-5.1


sql/handler.cc:
  Auto merged

Fixed "discover" in the handler API.

Fixed problem where handlerton was not zero'ed. I need to look around, I suspect this problem is more widespread. 


sql/ha_innodb.h:
  Unused variable
sql/ha_ndbcluster.cc:
  Added "discover" to handlerton.
sql/handler.cc:
  Added plugin loop and correctly now use handler API.
sql/handler.h:
  Removed unused variable. Added discover to handler API
sql/mysqld.cc:
  Removed unused variables.
sql/sql_plugin.cc:
  Fixed DBUG Enter comment (obvious cut paste mistake)
storage/csv/ha_tina.cc:
  Found that if we don't bzero handlerton, that things can go boom!
  
  This probably needs to be fixed for all handlers

into  example.com:/work/mysql-5.0-runtime

erroneous check

Problem: Actually there were two problems in the server code. The check
for SQLCOM_FLUSH in SF/Triggers were not according to the existing
architecture which uses sp_get_flags_for_command() from sp_head.cc .
This function was also missing a check for SQLCOM_FLUSH which has a
problem combined with prelocking. This changeset fixes both of these
deficiencies as well as the erroneous check in
sp_head::is_not_allowed_in_function() which was a copy&paste error.


mysql-test/r/sp-error.result:
  update result
mysql-test/r/trigger.result:
  update result
mysql-test/t/sp-error.test:
  FLUSH can create a problem with prelocking, hence it's disabled.
  There is a better way to check this than a check in the parser.
  Now we use sp_get_flags_for_command() and the error returned is
  different.
mysql-test/t/trigger.test:
  FLUSH can create a problem with prelocking, hence it's disabled.
  There is a better way to check this than a check in the parser.
  Now we use sp_get_flags_for_command() and the error returned is
  different.
sql/sp_head.cc:
  FLUSH and RESET are not allowed inside a SF/Trigger.
  Because they don't imply a COMMIT sp_head::HAS_COMMIT_OR_ROLLBACK
  cannot be used. Two new flags were introduced for that reason.
sql/sp_head.h:
  Don't check m_type as this check is erroneous. This is probably
  a copy and paste error when moving code from somewhere else. Another
  fact which supports this was prefixing the enum value with the name
  of class sp_head.
  
  Adding two new flags HAS_SQLCOM_RESET and HAS_SQLCOM_FLUSH. The values
  are 2048 and 4096 because in the 5.1 branch there are already new flags
  which are with values up-to 1024.
sql/sql_parse.cc:
  FLUSH can cause a problem with prelocking in SF/Trigger and
  therefore is already disabled. RESET is also disabled because
  is handled by the same code as FLUSH. We won't allow RESET inside
  SF/Trigger at that stage without thorough analysis. The check for
  them is already done in the parser by calling
  is_not_allowed_in_function()
sql/sql_yacc.yy:
  By listing SQLCOM_FLUSH as command which implies COMMIT
  in sp_get_flags_for_command() the check in sql_yacc.yy is
  obsolete.

into  alik.:/mnt/raid/alik/MySQL/devel/5.0-rt-bug16899

CMakeLists.txt:
  add for federated
libmysqld/CMakeLists.txt:
  ha_heap.cc and ha_myisam.cc are removed
  add for federated
sql/CMakeLists.txt:
  add for federated
sql/handler.cc:
  fix for fussy compilers
storage/heap/CMakeLists.txt:
  add ha_heap.cc
storage/myisammrg/CMakeLists.txt:
  add ha_myisammrg.cc

The following procedure was not possible if max_sp_recursion_depth is 0
create procedure show_proc() show create procedure show_proc;
  
Actually there is no recursive call but the limit is checked.
  
Solved by temporarily increasing the thread's limit just before the fetch from cache
and decreasing after that.


mysql-test/r/sp.result:
  update result
mysql-test/t/sp.test:
  Test for bug #21416 SP: Recursion level higher than zero needed for non-recursive call
sql/sp.cc:
  Increase the max_sp_recursion_depth temporarily for SHOW CREATE PROCEDURE call.
  This call is in fact not recursive but is counted as such. Outcome, it will work
  always but if max_sp_recursion_depth is reached we are going to cache one more
  sp_head instance.

Changed trigger-handling code so that there will be the one
place for generate statement string for replication log
and for trigger file.


sql/sql_trigger.cc:
  Changed trigger-handling code so that there will be the one
  place for generate statement string for replication log
  and for trigger file.
sql/sql_trigger.h:
  Changed trigger-handling code so that there will be the one
  place for generate statement string for replication log
  and for trigger file.

into  mysql.com:/home/cps/mysql/trees/mysql-5.1-virgin

Changes in an item tree done by optimizer weren't properly
registered and went unnoticed, which resulted in preliminary freeing
of used memory.


mysql-test/r/ps.result:
  Add result for bug#21166: Prepared statement causes signal 11
  on second execution.
mysql-test/t/ps.test:
  Add test case for bug#21166: Prepared statement causes signal 11
  on second execution.
sql/item.cc:
  Move Item::transform() and Item_default_value::transform() from
  item.h here and use THD::change_item_tree() instead of plain
  assignment.
  Change Item_field::set_no_const_sub() to be used with Item::walk()
  instead of Item::transform().
sql/item.h:
  Move definition of Item::transform() and Item_default_value::transform()
  to item.cc.
  Change Item::set_no_const_sub() to be used with Item::walk()
  instead of Item::transform().
sql/item_cmpfunc.cc:
  Use Item::walk() to execute Item::set_no_const_sub().
  Use THD::change_item_tree() instead of plain assignment.
sql/item_func.cc:
  Add assert and comment to Item_func::traverse_cond().
sql/item_row.cc:
  Use THD::change_item_tree() instead of plain assignment.
sql/item_strfunc.cc:
  Move Item_func_make_set::transform() from item_strfunc.h here and use
  THD::change_item_tree() instead of plain assignment.
sql/item_strfunc.h:
  Move definition of Item_func_make_set::transform() to item_strfunc.cc.

client/mysql.cc:
  Windows warnings clean up
server-tools/instance-manager/parse.cc:
  Cleanedup warning
sql/field.cc:
  Removed unused variables
sql/filesort.cc:
  Removed unused variables
sql/ha_innodb.cc:
  Removed unused variables
sql/ha_partition.cc:
  Fixing warning
sql/partition_element.h:
  Fixing declaration for warnings

BitKeeper/deleted/.del-configure.in:
  Delete: storage/innobase/configure.in
BUILD/FINISH.sh:
  Removed work for Innodb's configure
BUILD/autorun.sh:
  Removed pieces for Innodb's build
storage/innobase/Makefile.am:
  Removed ib_config.h needs
storage/innobase/include/Makefile.i:
  Expanded includes.
storage/innobase/include/univ.i:
  Removed ib_config need
storage/innobase/plug.in:
  Added support taken from configure.in for building Innodb

  
User name (host name) has limit on length. The server code relies on these
limits when storing the names. The problem was that sometimes these limits
were not checked properly, so that could lead to buffer overflow.

The fix is to check length of user/host name in parser and if string is too
long, throw an error.


mysql-test/r/grant.result:
  Updated result file.
mysql-test/r/sp.result:
  Updated result file.
mysql-test/r/trigger.result:
  Updated result file.
mysql-test/r/view.result:
  Updated result file.
mysql-test/t/grant.test:
  Added test for BUG#16899.
mysql-test/t/sp.test:
  Added test for BUG#16899.
mysql-test/t/trigger.test:
  Added test for BUG#16899.
mysql-test/t/view.test:
  Added test for BUG#16899.
sql/mysql_priv.h:
  Added prototype for new function.
sql/share/errmsg.txt:
  Added new resources.
sql/sql_acl.cc:
  Remove outdated checks.
sql/sql_parse.cc:
  Add a new function for checking string length.
sql/sql_yacc.yy:
  Check length of user/host name.

into  lamia.home:/home/timka/mysql/src/5.0-bug-21456


mysql-test/r/distinct.result:
  Merge the fix for BUG#21456
mysql-test/t/distinct.test:
  Merge the fix for BUG#21456
sql/sql_select.cc:
  Merge the fix for BUG#21456

into  example.com:/work/mysql-5.1-runtime

should work in Prepared Statements. Post-review changeset.

Problem: There are some commands which are avaiable to be executed in SP
         but cannot be prepared. This patch fixes this and makes it possible
         prepare these statements.

Changes: The commands later are made available in PS. RESET has been forbidden
         in SF/Trigger.

Solution: All current server commands where checked and those missing (see later)
          we added. Tests for all of the commands with repeated executions were
          added - testing with SP, SF and PS.

SHOW BINLOG EVENTS
SHOW (MASTER | SLAVE) STATUS
SHOW (MASTER | BINARY) LOGS
SHOW (PROCEDURE | FUNCTION) CODE (parsable only in debug builds)
SHOW CREATE (PROCEDURE | FUNCTION | EVENT | TABLE | VIEW)
SHOW (AUTHORS | CONTRIBUTORS | WARNINGS | ERRORS)
CHANGE MASTER
RESET (MASTER | SLAVE | QUERY CACHE)
SLAVE (START | STOP)
CHECKSUM (TABLE | TABLES)
INSTALL PLUGIN
UNINSTALL PLUGIN
CACHE INDEX
LOAD INDEX INTO CACHE
GRANT
REVOKE
KILL
(CREATE | RENAME | DROP) DATABASE
(CREATE | RENAME | DROP) USER
FLUSH (TABLE | TABLES | TABLES WITH READ LOCK | HOSTS | PRIVILEGES |
       LOGS | STATUS | MASTER | SLAVE | DES_KEY_FILE | USER_RESOURCES)


mysql-test/r/ps.result:
  update result
mysql-test/r/ps_1general.result:
  update result
mysql-test/r/ps_grant.result:
  update result
mysql-test/r/sp-dynamic.result:
  update result
mysql-test/t/ps.test:
  Add more statements, probably all currently missing which are possible in
  a SP but not preparable.
  Every statement is tested in a SP, in a SF and attempted to prepare.
mysql-test/t/ps_1general.test:
  - Enable some of the statements, which are already possible in SP.
  - 1295 -> ER_UNSUPPORTED_PS
mysql-test/t/ps_grant.test:
  Enable statements already possible in SP.
sql/sp_head.cc:
  - Reorder to keep some alphabet order.
  - Add missing SHOW_SCHEDULER_STATUS.
sql/sql_prepare.cc:
  Add possibility to prepare statements, which are already allowed in SP.

GROUP BY/DISTINCT pruning optimization must be done before ORDER BY 
optimization because ORDER BY may be removed when GROUP BY/DISTINCT
sorts as a side effect, e.g. in 
  SELECT DISTINCT <non-key-col>,<pk> FROM t1
  ORDER BY <non-key-col> DISTINCT
must be removed before ORDER BY as if done the other way around
it will remove both.


mysql-test/r/distinct.result:
  Test for BUG#21456.
mysql-test/t/distinct.test:
  Test for BUG#21456.
sql/sql_select.cc:
  Bug #21456: SELECT DISTINCT(x) produces incorrect results when using order by
  
  GROUP BY/DISTINCT pruning optimization must be done before ORDER BY 
  optimization because ORDER BY may be removed when GROUP BY/DISTINCT
  sorts as a side effect.

into  mysql.com:/home/cps/mysql/trees/mysql-5.1-virgin


storage/csv/ha_tina.cc:
  merge later
mysql-test/r/csv.result:
  manual merge
mysql-test/t/csv.test:
  manual merge

into  mysql.com:/home/cps/mysql/trees/mysql-5.1-virgin


sql/mysql_priv.h:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_view.cc:
  Auto merged
sql/table.cc:
  Auto merged
sql/table.h:
  Auto merged
sql/handler.cc:
  manual merge

Implemented code review comments
Test cleanup


sql/protocol.cc:
  Bug#8153 (Stored procedure with subquery and continue handler, wrong result)
  
  Implemented code review comments

Plugins now when compiled or not compiled work correctly with status variables. 
Status variables from plugins now set their own names (removed bit where plugin name was pre-appended this broke Innodb and Cluster)
A few Makefile cleanups. 


sql/ha_innodb.cc:
  Cleanup to make status variables directly in engine
sql/ha_ndbcluster.cc:
  Engine interface now has variables for status
sql/handler.cc:
  handler now makes sure to init status variables
sql/mysqld.cc:
  Removed status variable hacks
sql/sql_delete.cc:
  Removed include file that was not required
storage/myisam/Makefile.am:
  Cleaned up line lengths and addded additional include to not install.
storage/myisam/ha_myisam.cc:
  Removed double plugin include

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-8153


mysql-test/r/sp.result:
  Auto merged
mysql-test/t/sp.test:
  Auto merged
sql/mysqld.cc:
  Auto merged

mysql-test/r/grant.result:
  Update result file format to 5.1 version

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.0-bug21051-2


include/mysql_com.h:
  Auto merged
sql/sql_class.cc:
  Auto merged

There were two problems: RESET QUERY CACHE took a long time to complete
and other threads were blocked during this time.

The patch does three things:
  1 fixes a bug with improper use of test-lock-test_again technique.
      AKA Double-Checked Locking is applicable here only in few places.
  2 Somewhat improves performance of RESET QUERY CACHE.
      Do my_hash_reset() instead of deleting elements one by one.  Note
      however that the slowdown also happens when inserting into sorted
      list of free blocks, should be rewritten using balanced tree.
  3 Makes RESET QUERY CACHE non-blocking.
      The patch adjusts the locking protocol of the query cache in the
      following way: it introduces a flag flush_in_progress, which is
      set when Query_cache::flush_cache() is in progress.  This call
      sets the flag on enter, and then releases the lock.  Every other
      call is able to acquire the lock, but does nothing if
      flush_in_progress is set (as if the query cache is disabled).
      The only exception is the concurrent calls to
      Query_cache::flush_cache(), that are blocked until the flush is
      over.  When leaving Query_cache::flush_cache(), the lock is
      acquired and the flag is reset, and one thread waiting on
      Query_cache::flush_cache() (if any) is notified that it may
      proceed.


include/mysql_com.h:
  Add comment for NET::query_cache_query.
sql/net_serv.cc:
  Use query_cache_init_query() for initialization of
  NET::query_cache_query if query cache is used.
  Do not access net->query_cache_query without a lock.
sql/sql_cache.cc:
  Fix bug with accessing query_cache_size, Query_cache_query::wri and
  thd->net.query_cache_query before acquiring the lock---leave
  double-check locking only in safe places.
  Wherever we check that cache is usable (query_cache_size > 0) we now
  also check that flush_in_progress is false, i.e. we are not in the
  middle of cache flush.
  Add Query_cache::not_in_flush_or_wait() method and use it in
  Query_cache::flush_cache(), so that threads doing cache flush will
  wait it to finish, while other threads will bypass the cache as if
  it is disabled.
  Extract Query_cache::free_query_internal() from Query_cache::free_query(),
  which does not removes elements from the hash, and use it together with
  my_hash_reset() in Query_cache::flush_cache().
sql/sql_cache.h:
  Add declarations for new members and methods.
  Make is_cacheable() a static method.
  Add query_cache_init_query() function.
sql/sql_class.cc:
  Use query_cache_init_query() for initialization of
  NET::query_cache_query.