Too many cursors (more than 1024) could lead to memory corruption.
This affects both, stored routines and C API cursors, and the
threshold is per-server, not per-connection.  Similarly, the
corruption could happen when the server was under heavy load
(executing more than 1024 simultaneous complex queries), and this is
the reason why this bug is fixed in 4.1, which doesn't support
cursors.

The corruption was caused by a bug in the temporary tables code, when
an attempt to create a table could lead to a write beyond allocated
space.  Note, that only internal tables were affected (the tables
created internally by the server to resolve the query), not tables
created with CREATE TEMPORARY TABLE.  Another pre-condition for the
bug is TRUE value of --temp-pool startup option, which, however, is a
default.

The cause of a bug was that random memory was overwritten in
bitmap_set_next() due to out-of-bound memory access.


mysys/my_bitmap.c:
  Local 'bitmap_size' is measured in bytes, no need to multiply it by 8.
sql/sql_select.cc:
  Clear the temp_pool_slot bit only if we have set it previously.
tests/mysql_client_test.c:
  Add test case for bug#21206: memory corruption when too many cursors
  are opened at once.

    (Re-apply a patch from the general tree to the clone.)


mysql-test/mysql-test-run.pl:
  "mysql-test-run.pl" must write a "Logging:" line for the evaluation of RPM build tests.
  (Re-apply a patch from the general tree to the clone.)

      BUG#20850: Assert during slave shutdown in many rpl_* tests
      This patch has already been applied to 5.1.


sql/slave.cc:
      BUG#20850: Assert during slave shutdown in many rpl_* tests
      This patch has already been applied to 5.1.

  Place mysqlmanager 'pdb' file in 'client_debug' directory
mysys.vcproj:
  Removed define of __NT__ from 'Debug' target
mysqld.vcproj:
  Always generate 'pdb' and 'map' files


server-tools/instance-manager/mysqlmanager.vcproj:
  Place mysqlmanager 'pdb' file in 'client_debug' directory
VC++Files/mysys/mysys.vcproj:
  Removed define of __NT__ from 'Debug' target
VC++Files/sql/mysqld.vcproj:
  Always generate 'pdb' and 'map' files

"real" table fails in JOINs".

This is a regression caused by the fix for Bug 18444. 
This fix removed the assignment of empty_c_string to table->db performed 
in add_table_to_list, as neither me nor anyone else knew what it was 
there for. Now we know it and it's covered with tests: the only case 
when a table database name can be empty is when the table is a derived 
table. The fix puts the assignment back but makes it a bit more explicit.

Additionally, finally drop sp.result.orig which was checked in by mistake. 


BitKeeper/deleted/.del-sp.result.orig:
  Delete: mysql-test/r/sp.result.orig
mysql-test/r/derived.result:
  Updated result file.
mysql-test/r/sp.result:
  Test results fixed (Bug#21002)
mysql-test/t/derived.test:
  New error return for the case when MULTI-DELETE tries to delete from
  a derived table: now derived tables belong to their own db (""), and
  MUTLI-DELETE can't find the correspondent table for it in the 
  DELETE list, as it can't resolve tables in different dbs by alias
  (See Bug#21148 for details)
mysql-test/t/sp.test:
  Add a test case for Bug#21002 "Derived table not selecting from a "real"
   table fails in JOINs"
sql/sp.cc:
  Make empty_c_string globally accessible.
sql/sql_class.cc:
  Add empty_c_string definition.
sql/sql_class.h:
  Add a comment for the constructor of Table_ident which is
  used for derived tables. Make sure this constructor also initializes
  the database name, not only the table name.
sql/sql_parse.cc:
  Don't call check_db_name for empty database. 
  Currently the only case when a table database name can be empty
  is when the table is a derived table.
  Report the right error if the database name is wrong (ER_WRONG_DB_NAME,
  not ER_WRONG_TABLE_NAME).

REPLACE ... SELECT would require INSERT privileges on certain tables
when SELECT really suffices. Require INSERT only on target table.


mysql-test/r/insert_select.result:
  Bug#20989: View '(null).(null)' references invalid table(s)... on SQL SECURITY INVOKER
  
  Show that REPLACE ... SELECT requires INSERT privileges only on target table.
  (revised test with more view-fu)
mysql-test/t/insert_select.test:
  Bug#20989: View '(null).(null)' references invalid table(s)... on SQL SECURITY INVOKER
  
  Show that REPLACE ... SELECT requires INSERT privileges only on target table.
  (revised test with more view-fu)
sql/sql_insert.cc:
  Bug#20989: View '(null).(null)' references invalid table(s)... on SQL SECURITY INVOKER
  
  require SELECT rather than INSERT privs on tables that constitute the views we'll read

client/mysqldump.c:
  When dumping more than one database, make sure that the proper database is selected before restoring that database's views.
  Replaced hard-coded database name length with appropiate token.
mysql-test/r/mysqldump.result:
  Added new result and corrected results for existing test cases.
mysql-test/t/mysqldump.test:
  Added new case for dumping and restoring multiple databases each containing a view.

mysqldump did not select the correct database before trying to dump
views from it. this resulted in an empty result set, which in turn
startled mysql-dump into a core-dump.  this only happened for views,
not for tables, and was only visible with multiple databases that
weren't by sheer luck in the order mysqldump required, anyway. this
fixes by selecting the correct database before dumping views; it also
catches the empty set-condition if it should occur for other reasons.


client/mysqldump.c:
  Bug#21014: Segmentation fault of mysqldump on view
  
  failsafe: if "select ... from information_schema.views" returns an
  empty set, don't deref NULL; throw an error instead.
  
  fix: select the correct database not only before dumping tables, but
  before dumping views, as well.
mysql-test/r/mysqldump.result:
  Bug#21014: Segmentation fault of mysqldump on view
  
  show that mysqldump selects the correct database before trying to dump
  views from it.
mysql-test/t/mysqldump.test:
  Bug#21014: Segmentation fault of mysqldump on view
  
  show that mysqldump selects the correct database before trying to dump
  views from it.

support-files/mysql.spec.sh:
  Fix a typing error in the "make" target for the Perl script to run the tests.

into  trift2.:/M50/clone-5.0

support-files/mysql.spec.sh:
  Use the Perl script to run the tests, because it will automatically check
  whether the server is configured with SSL.
  (The shell script needs an explicit flag, and we cannot pass that though "make".)

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0-release


sql/ha_ndbcluster.cc:
  Auto merged

- partial backport of code from 5.1, do cot compare_record for engines that do not read all columns during update

  
Two functions have different ideas of what a string should look like;
one of them reads memory it assumes the other one may have written.
And "if you assume ..."
  
We now use a more defensive variety of the assuming function, this fixes
a warning thrown by the valgrind tool.


sql/item_cmpfunc.cc:
  c_ptr() makes incorrect assumptions about the string we get from
  out of args[0]->val_str(&tmp); c_str_safe() is more defensive.

  Define 'mysql_get_ssl_cipher' even if no SSL built in, it is referenced in libmysql.def


sql-common/client.c:
  Define 'mysql_get_ssl_cipher' even if no SSL built in, it is referenced in libmysql.def

into mysql.com:/Users/kent/mysql/bk/mysql-5.0-release

  Use Perl for filtering, do more filtering


netware/BUILD/mwasmnlm:
  Use Perl for filtering, do more filtering
netware/BUILD/mwccnlm:
  Use Perl for filtering, do more filtering
netware/BUILD/mwldnlm:
  Use Perl for filtering, do more filtering

  Avoid duplicate symbol errors on Netware
mwldnlm, mwccnlm, mwasmnlm:
  Filter garbage characters from output


netware/BUILD/mwasmnlm:
  Filter garbage characters from output
netware/BUILD/mwccnlm:
  Filter garbage characters from output
netware/BUILD/mwldnlm:
  Filter garbage characters from output
tests/Makefile.am:
  Avoid duplicate symbol errors on Netware

  Don't define __NT__ for 'Max' target


VC++Files/sql/mysqld.vcproj:
  Don't define __NT__ for 'Max' target

  Added missing parameter type change for _my_strdup_with_length()


include/my_sys.h:
  Added missing parameter type change for _my_strdup_with_length()

   1.2525 06/06/30 18:29:27 monty@mysql.com +3 -0
   Reverted wrong bug fix (Bug#11228)


mysql-test/r/key.result:
  Manual transfer of the following fix into the 5.0.23 release clone:
     1.27 06/06/30 18:29:25 monty@mysql.com +9 -1
     Fixed result after removing wrong bug fix
mysql-test/t/key.test:
  Manual transfer of the following fix into the 5.0.23 release clone:
     1.24 06/06/30 18:29:25 monty@mysql.com +1 -0
     Added SHOW CREATE TABLE, which is the proper way to check for table definitions
sql/table.cc:
  Manual transfer of the following fix into the 5.0.23 release clone:
     1.135 06/06/30 18:29:25 monty@mysql.com +21 -0
     Reverted wrong bug fix.   ...

- added missing retrieval of hidden primary key

into  mysql.com:/usr/local/mysql/mysql-5.0-release

In some functions dealing with strings and character sets, the wrong
pointers were saved for restoration in THD::rollback_item_tree_changes().
This could potentially cause random corruption or crashes.

Fixed by passing the original Item ** locations, not local stack copies.

Also remove unnecessary use of default arguments.


sql/item.cc:
  Function agg_item_charsets() now handles non-consequtive Item *'s.
sql/item.h:
  Remove use of default argument.
sql/item_cmpfunc.cc:
  Remove use of default argument.
sql/item_func.cc:
  Remove use of default argument.
sql/item_func.h:
  Function agg_item_charsets() now handles non-consequtive Item *'s.
sql/item_strfunc.cc:
  Pass original Item **'s to agg_arg_charsets(), not local copies, to ensure
  proper restoration in THD::rollback_item_tree_changes().
sql/item_sum.cc:
  Remove use of default argument.

  Disable old RPM strip
my_global.h:
  Fixed wrong cast, which caused problems with gcc 4.0 and
  floats in prepared statements (Bug #19694)
mysqlmanager.vcproj:
  Place output files in common release/debug directory


server-tools/instance-manager/mysqlmanager.vcproj:
  Place output files in common release/debug directory
include/my_global.h:
  Fixed wrong cast, which caused problems with gcc 4.0 and
  floats in prepared statements (Bug #19694)
support-files/mysql.spec.sh:
  Disable old RPM strip

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0


sql/ha_ndbcluster.cc:
  manual merge

Re-apply a patch by Knielsen in the 5.0.23 build clone: Replace port number by "SLAVE_PORT".


mysql-test/r/federated.result:
  Re-apply a patch by Knielsen in the 5.0.23 build clone: Replace port number by "SLAVE_PORT".
mysql-test/t/federated.test:
  Re-apply a patch by Knielsen in the 5.0.23 build clone: Replace port number by "SLAVE_PORT".

into  mysql.com:/users/lthalmann/bkroot/mysql-5.0-release

into  mysql.com:/users/lthalmann/bkroot/mysql-5.0-release


include/my_sys.h:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
sql/log.cc:
  Auto merged

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


mysql-test/r/variables.result:
  Auto merged
mysql-test/r/information_schema.result:
  Manual merge.

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0-release

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0-main

into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.0-main