Commit graph

9636 commits

Author SHA1 Message Date
unknown
7731acb514 Merge neptunus.(none):/home/msvensson/mysql/work/my41-work
into  neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint
2006-09-25 20:15:51 +02:00
unknown
6f3c9bfaa1 Bug#18888 Trying to overwrite sql/lex_hash.h during build
-Backport fix for bug19738 to 4.1 


sql/Makefile.am:
  Generated source should depend on their sources not the tool
2006-09-25 20:01:39 +02:00
unknown
53d2e32b81 Merge bk-internal.mysql.com:/home/bk/mysql-4.1
into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-4.1-maint
2006-09-23 09:55:16 -04:00
unknown
14ad51e09e Merge mysql.com:/users/lthalmann/bkroot/mysql-4.1-rpl
into  mysql.com:/users/lthalmann/bk/MERGE/mysql-4.1-merge


BitKeeper/etc/ignore:
  auto-union
mysql-test/r/myisam.result:
  Auto merged
mysql-test/t/myisam.test:
  Auto merged
sql/sql_select.cc:
  Auto merged
2006-09-23 05:58:48 +02:00
unknown
5d3a59fae7 Fix for bug #20204: "order by" changes the results returned
Item_substr's results are improperly stored in a temporary table due to       
wrongly calculated max_length value for multi-byte charsets if two            
arguments specified.                                                          


mysql-test/r/ctype_utf8.result:
  Fix for bug #20204: "order by" changes the results returned
    - test case.
mysql-test/t/ctype_utf8.test:
  Fix for bug #20204: "order by" changes the results returned
    - test result.
sql/item_strfunc.cc:
  Fix for bug #20204: "order by" changes the results returned
    - always take into account current mbmaxlen value calculating max_length.
2006-09-21 16:05:01 +05:00
unknown
c19ac9ec91 Merge rkalimullin@bk-internal.mysql.com:/home/bk/mysql-4.1
into  mysql.com:/usr/home/ram/work/mysql-4.1-maint


mysql-test/r/func_time.result:
  Auto merged
mysql-test/t/func_time.test:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
2006-09-21 09:35:17 +05:00
unknown
941e502079 Merge mysql.com:/users/lthalmann/bkroot/mysql-4.1-rpl
into  mysql.com:/users/lthalmann/bk/MERGE/mysql-4.1-merge


sql/sql_yacc.yy:
  Auto merged
2006-09-20 16:17:30 +02:00
unknown
82a72ee17e Merge bk-internal:/home/bk/mysql-4.0
into  chilla.local:/home/mydev/mysql-4.1-bug14400-monty


BitKeeper/etc/ignore:
  auto-union
include/my_global.h:
  Auto merged
myisam/mi_rkey.c:
  Manual null merge as a better fix is already present.
mysql-test/r/myisam.result:
  Manual null merge as a better fix is already present.
mysql-test/t/myisam.test:
  Manual null merge as a better fix is already present.
sql/sql_select.cc:
  Manual merge of purify improvements.
2006-09-19 10:17:25 +02:00
unknown
96dbaffda6 Merge bk-internal:/home/bk/mysql-4.1-opt
into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-4.1-opt
2006-09-18 11:09:56 +02:00
unknown
e5345197ed Merge bk-internal:/home/bk/mysql-4.1-opt
into  macbook.gmz:/Users/kgeorge/mysql/work/B21180-4.1-opt


mysql-test/r/subselect.result:
  merge of 4.1-opt
mysql-test/t/subselect.test:
  merge of 4.1-opt
sql/opt_range.h:
  merge of 4.1-opt
2006-09-15 18:56:05 +03:00
unknown
341cc55ab6 Merge dl145s.mysql.com:/data/bk/team_tree_merge/CLEAN/mysql-4.1
into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-4.1-opt
2006-09-15 11:43:28 +02:00
unknown
a72cd53832 Merge mysql.com:/users/lthalmann/bkroot/mysql-4.1-rpl
into  mysql.com:/users/lthalmann/bk/MERGE/mysql-4.1-merge
2006-09-15 01:15:39 +02:00
unknown
76c48d4368 Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1-opt
into  moonbone.local:/work/21677-bug-4.1-opt-mysql
2006-09-14 18:46:44 +04:00
unknown
5d7cdfb358 Merge polly.local:/tmp/20924/bug20294/my41-bug20294
into  polly.local:/home/kaa/src/maint/m41-maint--07OGk


sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_func.h:
  Auto merged
sql/sql_class.h:
  Auto merged
2006-09-13 16:01:46 +04:00
unknown
418ae41b48 Cset exclude: kaa@polly.local|ChangeSet|20060912122540|09861
Cset exclude: kaa@polly.local|ChangeSet|20060908100829|09983


sql/item_cmpfunc.cc:
  Exclude
sql/item_cmpfunc.h:
  Exclude
sql/item_func.cc:
  Exclude
sql/item_func.h:
  Exclude
sql/log_event.cc:
  Exclude
sql/sql_class.h:
  Exclude
mysql-test/r/case.result:
  Exclude
mysql-test/r/func_if.result:
  Exclude
mysql-test/r/func_test.result:
  Exclude
mysql-test/r/user_var.result:
  Exclude
mysql-test/t/case.test:
  Exclude
mysql-test/t/func_if.test:
  Exclude
mysql-test/t/func_test.test:
  Exclude
mysql-test/t/user_var.test:
  Exclude
2006-09-13 14:41:28 +04:00
unknown
b479dcd15c Merge polly.local:/tmp/20924/bug20294/my41-bug20294
into  polly.local:/home/kaa/src/maint/m41-maint--07OGk


sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_func.h:
  Auto merged
sql/sql_class.h:
  Auto merged
2006-09-12 19:28:57 +04:00
unknown
f3e838706d item_cmpfunc.cc:
Removed changes to the Item_func_between::fix_length_and_dec() made in the fix for bug#16377
query_cache.result:
  Corrected a test case after removing a fix for bug#16377


mysql-test/r/query_cache.result:
  Corrected a test case after removing a fix for bug#16377
sql/item_cmpfunc.cc:
  Removed changes to the Item_func_between::fix_length_and_dec() made in the fix for bug#16377
2006-09-12 19:06:26 +04:00
unknown
5aa6e8615e Post-review fixes for bug #20924
mysql-test/r/case.result:
  Post-review fix for bug #20924
mysql-test/r/func_if.result:
  Post-review fix for bug #20924
mysql-test/r/func_test.result:
  Post-review fix for bug #20924
mysql-test/r/user_var.result:
  Post-review fix for bug #20924
mysql-test/t/case.test:
  Post-review fix for bug #20924
mysql-test/t/func_if.test:
  Post-review fix for bug #20924
mysql-test/t/func_test.test:
  Post-review fix for bug #20924
mysql-test/t/user_var.test:
  Post-review fix for bug #20924
sql/item_func.cc:
  Post-review fix for bug #20924
sql/item_func.h:
  Post-review fix for bug #20924
sql/log_event.cc:
  Post-review fix for bug #20924
2006-09-12 16:25:40 +04:00
unknown
2780bad053 Merge mysql.com:/users/lthalmann/bkroot/mysql-4.1-rpl
into  mysql.com:/users/lthalmann/bk/MERGE/mysql-4.1-merge
2006-09-11 11:25:55 +02:00
unknown
f64483cb90 Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
- Honor unsigned_flag in the corresponding functions
- Use compare_int_signed_unsigned()/compare_int_unsigned_signed() instead of explicit comparison in GREATEST() and LEAST()


mysql-test/r/case.result:
  Added test case for bug #20924
mysql-test/r/func_if.result:
  Added test case for bug #20924
mysql-test/r/func_test.result:
  Added test case for bug #20924
mysql-test/r/user_var.result:
  Added test case for bug #20924
mysql-test/t/case.test:
  Added test case for bug #20924
mysql-test/t/func_if.test:
  Added test case for bug #20924
mysql-test/t/func_test.test:
  Added test case for bug #20924
mysql-test/t/user_var.test:
  Added test case for bug #20924
sql/item_cmpfunc.cc:
  Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
  
  - Moved some code out of Arg_comparator to external functions to be reused in Item_func_min_max
  - Fixed IFNULL(), IF(), CASE() and COALESCE()
sql/item_cmpfunc.h:
  Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
  
  - Moved some code out of Arg_comparator to external functions to be reused in Item_func_min_max
sql/item_func.cc:
  Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
  
  Fixed LEAST(), GREATEST() and "SET @a=..." parts
sql/item_func.h:
  Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
  
  Fixed "SET @a=..." part
sql/sql_class.h:
  Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
  
  Fixed "SET @a=..." part
2006-09-08 14:08:29 +04:00
unknown
54caf667ca Bug#21555: incorrect behavior with INSERT ... ON DUPL KEY UPDATE and VALUES
VALUES() was considered a constant. This caused replacing 
 (or pre-calculating) it using uninitialized values before the actual
 execution takes place.
 Mark it as a non-constant (still not dependent of tables) to prevent
 the pre-calculation.


mysql-test/r/insert_update.result:
  Bug#21555: incorrect behavior with INSERT ... ON DUPL KEY UPDATE and VALUES
   - test case.
   - EXPLAIN output changed due to VALUES() not being considered a constant 
     anymore
mysql-test/t/insert_update.test:
  Bug#21555: incorrect behavior with INSERT ... ON DUPL KEY UPDATE and VALUES
   - test case.
sql/item.h:
  Bug#21555: incorrect behavior with INSERT ... ON DUPL KEY UPDATE and VALUES
   - mark Item_insert_value as non-constant to prevent early calculation.
2006-09-08 10:24:14 +03:00
unknown
aa840645e6 query_cache.result, func_time.test, type_date.result, func_time.result:
Corrected test case after removal of fix for bug#16377         
type_date.test:
  Corrected test case after removal of fix for bug#16377
item_cmpfunc.cc:
  Removed changes to the agg_cmp_type() made in the for bug#16377


mysql-test/t/type_date.test:
  Corrected test case after removal of fix for bug#16377
mysql-test/t/func_time.test:
  Corrected test case after removal of fix for bug#16377
mysql-test/r/type_date.result:
  Corrected test case after removal of fix for bug#16377
mysql-test/r/query_cache.result:
  Corrected test case after removal of fix for bug#16377
mysql-test/r/func_time.result:
  Corrected test case after removal of fix for bug#16377
sql/item_cmpfunc.cc:
  Removed changes to the agg_cmp_type() made in the for bug#16377
2006-09-08 00:59:34 +04:00
unknown
cfff435362 Merge maint1.mysql.com:/data/localhome/tsmith/bk/bfx/my41-bfx
into  maint1.mysql.com:/data/localhome/tsmith/bk/41


sql/mysqld.cc:
  Auto merged
2006-09-07 01:14:54 +02:00
unknown
7a77b3d80f Bug #21054: myisam_stats_method ignored in my.cnf and cmdline
Fix OPT_MYISAM_STATS_METHOD case, where the NULLS_EQUAL and NULLS_NOT_EQUAL methods were mixed up


sql/mysqld.cc:
  Fix OPT_MYISAM_STATS_METHOD case, bug #21054
2006-09-07 00:11:43 +02:00
unknown
ada41e2498 Bug #21250: esolve stack traces on AMD64 (backport to mysql-4.1)
sql/stacktrace.c:
  stacktrace dumps for amd64 (backport fix for bug 21250 to mysql-4.1)
sql/stacktrace.h:
  stacktrace dumps for amd64 (backport fix for bug 21250 to mysql-4.1)
2006-09-07 00:01:00 +02:00
unknown
c463d2cd7b Merge bk-internal.mysql.com:/home/bk/mysql-4.1-maint
into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-4.1-maint
2006-09-06 14:44:59 -04:00
unknown
b527a75e01 Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-4.1-opt
into  rakia.(none):/home/kgeorge/mysql/autopush/B16792-4.1-opt


mysql-test/r/subselect.result:
  Auto merged
sql/sql_select.cc:
  Auto merged
2006-09-05 19:22:55 +03:00
unknown
ec2512cf18 Merge perch.ndb.mysql.com:/home/jonas/src/mysql-4.1
into  perch.ndb.mysql.com:/home/jonas/src/mysql-4.1-ndb
2006-09-05 15:05:52 +02:00
unknown
ff1d115e3a Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-4.1-opt
into  rakia.(none):/home/kgeorge/mysql/autopush/B21392-4.1-opt


sql/sql_parse.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
2006-09-05 13:12:30 +03:00
unknown
1431966d02 Bug #21392: multi-table delete with alias table name fails with
1003: Incorrect table name
in multi-table DELETE the set of tables to delete from actually 
references then tables in the other list, e.g:
DELETE alias_of_t1 FROM t1 alias_of_t1 WHERE ....
is a valid statement.
So we must turn off table name syntactical validity check for alias_of_t1 
because it's not a table name (even if it looks like one).
In order to do that we add a special flag (TL_OPTION_ALIAS) to 
disable the name checking for the aliases in multi-table DELETE.


mysql-test/r/delete.result:
  Bug #21392: multi-table delete with alias table name fails with
              1003: Incorrect table name
   - test case
mysql-test/t/delete.test:
  Bug #21392: multi-table delete with alias table name fails with
              1003: Incorrect table name
   - test case
sql/mysql_priv.h:
  Bug #21392: multi-table delete with alias table name fails with
              1003: Incorrect table name
   - add a special flag to disable the name checking for the aliases
     in multi-table DELETE
sql/sql_parse.cc:
  Bug #21392: multi-table delete with alias table name fails with
              1003: Incorrect table name
   - add a special flag to disable the name checking for the aliases
     in multi-table DELETE
sql/sql_yacc.yy:
  Bug #21392: multi-table delete with alias table name fails with
              1003: Incorrect table name
   - add a special flag to disable the name checking for the aliases
     in multi-table DELETE
2006-09-04 18:40:30 +03:00
unknown
1039540807 BUG#21787: COUNT(*) + ORDER BY + LIMIT returns wrong result
Fix an error in the bug fix.


sql/sql_select.cc:
  Use a local variable to iterate over group items, since
  'group' is used later in a condition.
2006-09-04 16:53:03 +03:00
unknown
19dc0e4173 Merge perch.ndb.mysql.com:/home/jonas/src/41-work
into  perch.ndb.mysql.com:/home/jonas/src/mysql-4.1-ndb


sql/log.cc:
  Auto merged
2006-09-04 14:45:13 +02:00
unknown
d2d605e4ea bug#21965 - replication
fix deadlock if master switches log file in parallell with "show master logs"
  


sql/log.cc:
  add raw_get_current_log which dont take log mutex
sql/sql_class.h:
  add raw_get_current_log which dont take log mutex
sql/sql_repl.cc:
  Fix lock order i.e first log_lock then index_lock
2006-09-04 13:43:34 +02:00
unknown
43eeeac033 Merge tnurnberg@bk-internal.mysql.com:/home/bk/mysql-4.1-maint
into  salvation.intern.azundris.com:/home/tnurnberg/21913/my41-21913


mysql-test/r/func_time.result:
  manual merge
mysql-test/t/func_time.test:
  manual merge
2006-09-04 09:28:39 +02:00
unknown
52f3977eef Bug#21913: DATE_FORMAT() Crashes mysql server if I use it through mysql-connector-j driver.
Variable character_set_results can legally be NULL (for "no conversion.")
This could result in a NULL deref that crashed the server.  Fixed.

(Although ran some additional precursory tests to see whether I could break
anything else, but no breakage so far.)


mysql-test/r/func_time.result:
  Bug#21913: DATE_FORMAT() Crashes mysql server if I use it through mysql-connector-j driver.
  
  Prove DATE_FORMAT() no longer crashes the server when character_set_results is
  NULL (which is a legal value and means, "no conversion").
mysql-test/t/func_time.test:
  Bug#21913: DATE_FORMAT() Crashes mysql server if I use it through mysql-connector-j driver.
  
  Prove DATE_FORMAT() no longer crashes the server when character_set_results is
  NULL (which is a legal value and means, "no conversion").
sql/sql_string.cc:
  Bug#21913: DATE_FORMAT() Crashes mysql server if I use it through mysql-connector-j driver.
  
  Avoid NULL deref in my_charset_same() -- if !to_cs, we won't need to compare
  because it is magic for, "no conversion."
2006-09-04 09:13:40 +02:00
unknown
b133be170a Merge lamia.home:/home/timka/mysql/src/4.1-virgin
into  lamia.home:/home/timka/mysql/src/4.1-bug-21787


sql/sql_select.cc:
  Auto merged
2006-09-01 17:21:49 +03:00
unknown
b017caefbd Fix for BUG#21787: COUNT(*) + ORDER BY + LIMIT returns wrong result
The problem was due to a prior fix for BUG 9676, which limited
the rows stored in a temporary table to the LIMIT clause. This
optimization is not applicable to non-group queries with aggregate
functions. The fix disables the optimization in this case.


mysql-test/r/limit.result:
  Test case for BUG#21787
mysql-test/t/limit.test:
  Test case for BUG#21787
sql/sql_select.cc:
  If there is an aggregate function in a non-group query,
  materialize all rows in the temporary table no matter if
  there is a LIMIT clause. This is necessary, since the
  aggregate functions must be computed over all result rows,
  not just the first LIMIT rows.
2006-09-01 15:07:04 +03:00
unknown
9c09d53312 BUG#18822 LOAD DATA FROM MASTER corrupts data
there is a bunch of dups. It has been decided to declare this feature as
deprecated.
  


sql/sql_yacc.yy:
  deprecation macro
2006-08-31 02:00:40 +03:00
unknown
ddb9f8668f Bug#20393 User name truncation in mysql client
Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte


include/mysql_com.h:
  Bug#20393 User name truncation in mysql client
  Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte
  added new constants NAME_BYTE_LEN, USERNAME_BYTE_LENGTH, SYSTEM_CHARSET_MBMAXLEN
mysql-test/r/ctype_utf8.result:
  Bug#20393 User name truncation in mysql client
  Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte
  test case
mysql-test/t/ctype_utf8.test:
  Bug#20393 User name truncation in mysql client
  Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte
  test case
sql-common/client.c:
  Bug#20393 User name truncation in mysql client
  Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte
  increased buffers for user name & db
sql/sql_acl.cc:
  Bug#20393 User name truncation in mysql client
  Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte
  check that user name is not longer than USERNAME_LENGTH symbols
sql/sql_parse.cc:
  Bug#20393 User name truncation in mysql client
  Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte
  increased buffers for user name & db
sql/table.cc:
  Bug#20393 User name truncation in mysql client
  Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte
  check that db name is not longer than NAME_LEN symbols
2006-08-30 15:56:17 +05:00
unknown
2416a453eb Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1
into  moonbone.local:/work/tmp_merge-4.1-opt-mysql
2006-08-27 23:43:11 +04:00
unknown
85c064f6b1 Merge moonbone.local:/work/tmp_merge-4.1-mysql
into  moonbone.local:/work/tmp_merge-4.1-opt-mysql
2006-08-26 23:11:34 +04:00
unknown
c74c819533 Bug #16255: Subquery in WHERE (the cset by Georgi Kodinov)
Must not use Item_direct_ref in HAVING because it points to
 the new value (witch is not yet calculated for the first row).


mysql-test/r/subselect.result:
  Bug #16255: Subquery in where
   - test case
mysql-test/t/subselect.test:
  Bug #16255: Subquery in where
   - test case
sql/item_subselect.cc:
  Bug #16255: Subquery in where
   Must not use Item_direct_ref in HAVING because it points to
   the new value (witch is not yet calculated for the first row).
2006-08-24 19:14:36 +04:00
unknown
95f8e0476b Merge tim@tsmith.mysql.internal:m/bk/41
into  maint1.mysql.com:/data/localhome/tsmith/bk/41
2006-08-24 02:44:49 +02:00
unknown
66d913482f Merge siva.hindu.god:/usr/home/tim/m/bk/b21531-41
into  siva.hindu.god:/usr/home/tim/m/bk/41


sql/item_func.h:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
2006-08-23 18:06:07 -06:00
unknown
b2a0d025e3 Bug #21531: EXPORT_SET() doesn't accept args with coercible character sets
- Fix typo in Item_func_export_set::fix_length_and_dec() which caused character set aggregation to fail
- Remove default argument from last arg of agg_arg_charsets() function, to reduce potential errors


mysql-test/r/func_misc.result:
  Test EXPORT_SET() with charset coersion (bug #21531)
mysql-test/t/func_misc.test:
  Test EXPORT_SET() with charset coersion (bug #21531)
sql/item_func.h:
  Remove default argument from last arg of agg_arg_charsets() function, to reduce potential errors.
sql/item_strfunc.cc:
  Fix typo in Item_func_export_set::fix_length_and_dec() which caused character set aggregation to fail.
2006-08-23 18:02:31 -06:00
unknown
a9eebc9986 Merge siva.hindu.god:/usr/home/tim/m/bk/b20536-41
into  siva.hindu.god:/usr/home/tim/m/bk/41


sql/item_strfunc.cc:
  Auto merged
sql/item_strfunc.h:
  Auto merged
sql/slave.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
2006-08-23 16:30:05 -06:00
unknown
216f20ad00 Bug #20402: DROP USER failure logged as ERROR rather than WARNING
Remove some sql_print_error() calls which were triggered by user error (i.e., not server-level events at all).

Also, convert an sql_print_error -> sql_print_information for a non-error server event.


sql/slave.cc:
  Change sql_print_error to sql_print_information for non-error status message.
sql/sql_acl.cc:
  Remove sql_print_error calls for events which are not server errors
2006-08-23 15:37:54 -06:00
unknown
b221989740 Merge bk-internal:/home/bk/mysql-4.1
into  maint1.mysql.com:/data/localhome/tsmith/bk/41
2006-08-23 22:51:20 +02:00
unknown
e989c51d0d Merge lamia.home:/home/timka/mysql/src/4.1-virgin
into  lamia.home:/home/timka/mysql/src/4.1-bug-21456


sql/sql_select.cc:
  Auto merged
2006-08-23 18:30:21 +03:00
unknown
2baf2fdf13 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, 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.
2006-08-23 16:46:57 +03:00