When calculating the result length of an integer DIV function 
the number of decimals was used without checking the result type
first. Thus an uninitialized number of decimals was used for some 
types. This caused an excessive amount of memory to be allocated 
for the field's buffer and crashed the server.

 
Fixed by using the number of decimals only for data types that 
can have decimals and thus have valid decimals number.


mysql-test/r/func_math.result:
  Bug #30587: test case
mysql-test/t/func_math.test:
  Bug #30587: test case
sql/item_func.cc:
  Bug #30587: Don't use decimals on a type that doesn't have them.

into  mysql.com:/home/gluh/MySQL/Merge/5.0-opt

  Post-fix for bug#27695.


mysql-test/t/select.test:
  Post-fix for bug#27695.

into  devsrv-b.mysql.com:/data0/gshchepa/mysql-5.0-opt

into  magare.gmz:/home/kgeorge/mysql/autopush/B31001-5.0-opt

The optimizer sets index traversal in reverse order only if there are 
 used key parts that are not compared to a constant.
However using the primary key as an ORDER BY suffix rendered the check
incomplete : going in reverse order must still be used even if 
all the parts of the secondary key are compared to a constant.

Fixed by relaxing the check and set reverse traversal even when all
the secondary index keyparts are compared to a const.
Also account for the case when all the primary keys are compared to a
constant.


mysql-test/r/innodb_mysql.result:
  Bug #31001: test case
mysql-test/t/innodb_mysql.test:
  Bug #31001: test case
sql/sql_select.cc:
  Bug #31001: 
   - account for the case when all the primary key parts are compared
     to a constant
   - force test_if_skip_sort_order to go backwards over the key even 
     when the number of keyparts used is the same as the number of 
     keyparts equal to a constant. (because of the primary key 
     suffix).

into  mysql.com:/home/psergey/mysql-5.0-bug30324

- The bug was caused by COUNT(DISTINCT ...) code using Unique object in 
  a way that assumed that BIT(N) column occupies a contiguous space in
  temp_table->record[0] buffer. 
- The fix is to make COUNT(DISTINCT ...) code instruct create_tmp_table to
  create temporary table with column of type BIGINT, not BIT(N).


mysql-test/r/type_bit.result:
  BUG#30324: Grouping queries with COUNT(DISTINCT bit column) return wrong results
  - Testcase
mysql-test/t/type_bit.test:
  BUG#30324: Grouping queries with COUNT(DISTINCT bit column) return wrong results
  - Testcase
sql/item_sum.cc:
  BUG#30324: Grouping queries with COUNT(DISTINCT bit column) return wrong results
  - Make COUNT(DISTINCT ...) code instruct create_tmp_table to create 
    temporary table with BIGINT, not BIT(N) column.

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb-merge

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb-merge

into  devsrv-b.mysql.com:/data0/gshchepa/mysql-5.0-opt

into  gleb.loc:/home/uchum/work/bk/5.0-opt-27695

into  gleb.loc:/home/uchum/work/bk/5.0-opt

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

Declaring an all space column name in the SELECT FROM DUAL or in a view
leads to misleading warning message:
"Leading spaces are removed from name ' '".

The Item::set_name method has been modified to raise warnings like
"Name ' ' has become ''" in case of the truncation of an all
space identifier to an empty string identifier instead of the
"Leading spaces are removed from name ' '" warning message.


sql/item.cc:
  Fixed bug #27695.
  The Item::set_name method has been modified to raise warnings like
  "Name ' ' has become ''" in case of the truncation of an all
  space identifier to an empty string identifier instead of the
  "Leading spaces are removed from name ' '" warning message.
sql/share/errmsg.txt:
  Fixed bug #27695.
mysql-test/t/select.test:
  Added test case for bug #27695.
mysql-test/r/select.result:
  Added test case for bug #27695.

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.0-ndb

into  gleb.loc:/home/uchum/work/bk/5.0-opt

into  gleb.loc:/home/uchum/work/bk/5.0-opt


sql/sql_yacc.yy:
  Auto merged
mysql-test/r/sp.result:
  SCCS merged
mysql-test/t/sp.test:
  SCCS merged

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb-merge


mysql-test/Makefile.am:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb-bj

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb-merge


sql/ha_ndbcluster.cc:
  Auto merged

into  mysql.com:/home/psergey/mysql-5.0-bug30385


sql/opt_range.cc:
  Auto merged
mysql-test/r/delete.result:
  Manual merge
mysql-test/t/delete.test:
  Manual merge

in get_index_for_order(), don't walk over the end of the index key parts
when matching index description and needed ordering.


mysql-test/r/delete.result:
  BUG#30385: Testcase
mysql-test/t/delete.test:
  BUG#30385: Testcase

into  gleb.loc:/home/uchum/work/bk/5.0-opt


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

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


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

into  adventure.(none):/home/thek/Development/cpp/mysql-5.0-runtime


sql/sql_cache.cc:
  Auto merged

into  dl145s.mysql.com:/data0/mhansson/my50-bug30234-push


sql/sql_yacc.yy:
  Auto merged

  
DELETE FROM ... USING ... statements with the following type of 
ambiguous aliasing gave unexpected results:
DELETE FROM t1 AS alias USING t1, t2 AS alias WHERE t1.a = alias.a;
This query would leave table t1 intact but delete rows from t2.
Fixed by changing DELETE FROM ... USING syntax so that only alias 
references (as opposed to alias declarations) may be used in FROM.


mysql-test/r/delete.result:
  Bug#30234: Test Result
mysql-test/t/delete.test:
  Bug#30234: Test Case
sql/sql_yacc.yy:
  Bug#30234:
  - Added parser rule table_alias_ref_list that contains a list of table 
    aliases only.
  - Added parser rule table_alias_ref that sets the TL_OPTION_ALIAS in 
    order to turn off semantic checking that applies only for table names.

into  adventure.(none):/home/thek/Development/cpp/mysql-5.0-runtime


sql/sql_cache.cc:
  Auto merged

into  adventure.(none):/home/thek/Development/cpp/mysql-5.0-runtime


sql/sql_cache.cc:
  Auto merged

Invaldating a subset of a sufficiently large query cache can take a long time.
During this time the server is efficiently frozen and no other operation can
be executed. This patch addresses this problem by setting a time limit on
how long time a dictionary access request can take before giving up on the 
attempt. This patch does not work for query cache invalidations issued by
DROP, ALTER or RENAME TABLE operations.


sql/sql_cache.cc:
  Changed mutex locking to a timed spinn lock. If access to query cache dictionary
  takes "a long time" (currently more than 0.1 seconds) the system fall backs on
  ordinary statement execution.

Use view db name as thread default database, in order to ensure
that the view is parsed and prepared correctly.


mysql-test/r/sp.result:
  test result
mysql-test/t/sp.test:
  test case
sql/sql_parse.cc:
  copy thd->db_length to table_list->db_length
sql/sql_view.cc:
  Use view db name as thread default database, in order to ensure
  that the view is parsed and prepared correctly.

into  gleb.loc:/home/uchum/work/bk/5.0-opt