Commit graph

15980 commits

Author SHA1 Message Date
unknown
2850d7bd04 merging 2007-12-01 13:07:28 +04:00
unknown
51f5ac6b29 Merge mysql.com:/home/hf/work/mrg/my50-mrg
into  mysql.com:/home/hf/work/mrg/my51-mrg


sql/mysqld.cc:
  Auto merged
sql/protocol.cc:
  Auto merged
storage/federated/ha_federated.cc:
  Auto merged
tests/mysql_client_test.c:
  Auto merged
include/mysql_com.h:
  merging
libmysqld/lib_sql.cc:
  merging
mysql-test/r/federated.result:
  merging
mysql-test/t/federated.test:
  merging
storage/federated/ha_federated.h:
  mergin
2007-12-01 00:46:44 +04:00
unknown
104bba773b Merge mysql.com:/home/hf/work/32374/my50-32374
into  mysql.com:/home/hf/work/mrg/my50-mrg
2007-11-30 22:26:48 +04:00
unknown
65b77b9df6 Merge mysql.com:/home/hf/work/31890/my51-31890
into  mysql.com:/home/hf/work/mrg/my51-mrg


mysql-test/r/partition.result:
  SCCS merged
mysql-test/t/partition.test:
  merging
2007-11-30 22:25:03 +04:00
unknown
69f539affb Merge mysql.com:/home/hf/work/30430/my51-30430
into  mysql.com:/home/hf/work/mrg/my51-mrg
2007-11-30 22:19:05 +04:00
unknown
6959d20472 Bug #30430 crash:./mtr --embedded-server --ps-protocol cache_innodb func_misc...
PS-protocol data is stored in different format - the MYSQL_RECORDS->data
contains the link to the record content, not to array of the links to
the field's contents. So we have to handle it separately for
embedded-server query cache.


libmysqld/emb_qcache.cc:
  Bug #30430 crash:./mtr --embedded-server --ps-protocol cache_innodb func_misc...
  
  ps_protocol data now stored in it's particular way.
libmysqld/emb_qcache.h:
  Bug #30430 crash:./mtr --embedded-server --ps-protocol cache_innodb func_misc...
  
  Querycache_stream::load_char/store_char  ->
    load_uchar/store_uchar
mysql-test/r/func_misc.result:
  Bug #30430 crash:./mtr --embedded-server --ps-protocol cache_innodb func_misc...
  
  test result
mysql-test/t/func_misc.test:
  Bug #30430 crash:./mtr --embedded-server --ps-protocol cache_innodb func_misc...
  
  the test uses t2 table, so let's make sure it doesn't exist befor the start
2007-11-30 22:17:11 +04:00
unknown
ff7e7fcb67 Bug#32775 problems with SHOW EVENTS and Information_Schema
removed unnecessary privilege checks for I_S schema


mysql-test/r/information_schema.result:
  test result
mysql-test/t/information_schema.test:
  test case
sql/events.cc:
  There is no events in I_S so we don't need to execute check_access here.
sql/sql_parse.cc:
  removed unnecessary check
2007-11-30 18:48:22 +04:00
unknown
cef31e05e5 Bug #32374 crash with filesort when selecting from federated table and view.
filesort() uses file->estimate_rows_upper_bound() call to allocate
internal buffers. If this function returns a value smaller than
a number of row that will be returned later in find_all_keys(),
that can cause server crash.
Fixed by implementing ha_federated::estimate_rows_upper_bound() to
return maximum possible number of rows.
Present estimation for FEDERATED always returns 0 if the linked to the VIEW.


mysql-test/r/federated.result:
  Bug #32374 crash with filesort when selecting from federated table and view.
  
  test result
mysql-test/t/federated.test:
  Bug #32374 crash with filesort when selecting from federated table and view.
  
  test case
sql/ha_federated.cc:
  Bug #32374 crash with filesort when selecting from federated table and view.
  
  ha_federated::estimate_rows_upper_bound() implemented
sql/ha_federated.h:
  Bug #32374 crash with filesort when selecting from federated table and view.
  
  ha_federated::estimate_rows_upper_bound() interface
2007-11-30 17:08:00 +04:00
unknown
f4a7464f1e Merge spetrunia@bk-internal.mysql.com:/home/bk/mysql-5.1-opt
into  mysql.com:/home/psergey/mysql-5.1-bug32772
2007-11-28 22:43:52 +03:00
unknown
b9d8e34925 Bug#25629 CREATE TABLE LIKE does not work with INFORMATION_SCHEMA
added new func mysql_create_like_schema_frm() which creates frm file based on I_S table


mysql-test/r/create.result:
  test result
mysql-test/t/create.test:
  test case
sql/sql_table.cc:
  added new func mysql_create_like_schema_frm() which creates frm file based on I_S table
2007-11-28 15:37:00 +04:00
unknown
b5c0cf454d BUG#32772: partition crash 1: enum column
The bug was that for ordered index scans, ha_partition::index_init() did
not put index columns into table->read_set if the underlying storage 
engine did not have HA_PARTIAL_COLUMN_READ flag. 
This was causing assertion failure when handle_ordered_index_scan() tried
to sort the records according to index order.

Fixed by making ha_partition::index_init() put index columns into table->read_set
for all ordered scans. 


mysql-test/r/partition.result:
  BUG#32772: partition crash 1: enum column
  - Testcase
mysql-test/t/partition.test:
  BUG#32772: partition crash 1: enum column
  - Testcase
sql/ha_partition.cc:
  BUG#32772: partition crash 1: enum column
  - Make ha_partition::index_init() include index columns in the read_set
    whenever an ordered scan is initialized, no matter if
    HA_PARTIAL_COLUMN_READ is set or not.
2007-11-28 03:02:05 +03:00
unknown
9d503cea20 Merge magare.gmz:/home/kgeorge/mysql/work/B30355-5.0-opt
into  magare.gmz:/home/kgeorge/mysql/work/B30355-5.1-opt


include/mysql_com.h:
  Auto merged
mysql-test/r/udf.result:
  Auto merged
mysql-test/t/udf.test:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/udf_example.c:
  Auto merged
2007-11-27 17:19:51 +02:00
unknown
63b6516953 Bug #30355: Incorrect ordering of UDF results
There's currently no way of knowing the determinicity of an UDF.
And the optimizer and the sequence() UDFs were making wrong
assumptions about what the is_const member means.
Plus there was no implementation of update_system_tables()
causing the optimizer to overwrite the information returned by
the <udf>_init function.

Fixed by equating the assumptions about the semantics of 
is_const and providing a implementation of update_used_tables().
Added a TODO item for the UDF API change needed to make a better 
implementation.


include/mysql_com.h:
  Bug #30355: comment added
mysql-test/r/udf.result:
  Bug #30355: test case
mysql-test/t/udf.test:
  Bug #30355: test case
sql/item_func.cc:
  Bug #30355: keep const_item_cache and used_tables_cache in sync
sql/item_func.h:
  Bug #30355: 
   - a better implementation of update_used_tables()
   - keep const_item_cache and used_tables_cache in sync
sql/udf_example.c:
  Bug #30355: Wrong value for const_item fixed.
2007-11-27 17:16:52 +02:00
unknown
3058e02573 Many files:
Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.


mysql-test/r/subselect.result:
  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.
mysql-test/r/subselect_notembedded.result:
  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.
mysql-test/t/subselect.test:
  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.
mysql-test/t/subselect_notembedded.test:
  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.
2007-11-26 22:21:46 +03:00
unknown
8ae8b2e5ef Merge polly.(none):/home/kaa/src/opt/bug28837/my51-bug29131
into  polly.(none):/home/kaa/src/opt/mysql-5.1-opt


storage/myisam/ha_myisam.cc:
  Auto merged
mysql-test/r/merge.result:
  Manual merge.
mysql-test/r/myisam.result:
  Manual merge.
mysql-test/t/merge.test:
  Manual merge.
mysql-test/t/myisam.test:
  Manual merge.
2007-11-26 20:15:30 +03:00
unknown
ed48025916 Merge polly.(none):/home/kaa/src/opt/bug28837/my50-bug29131
into  polly.(none):/home/kaa/src/opt/bug28837/my51-bug29131


mysql-test/r/merge.result:
  Auto merged
mysql-test/t/merge.test:
  Auto merged
mysql-test/r/myisam.result:
  Manual merge.
mysql-test/t/myisam.test:
  Manual merge.
storage/myisam/ha_myisam.cc:
  Manual merge.
storage/myisammrg/ha_myisammrg.cc:
  Manual merge.
2007-11-26 20:02:04 +03:00
unknown
67bf39f241 Fix for bug #28837: MyISAM storage engine error (134) doing delete with
self-join

When doing DELETE with self-join on a MyISAM or MERGE table, it could
happen that a record being retrieved in join_read_next_same() has
already been deleted by previous iterations. That caused the engine's
index_next_same() method to fail with HA_ERR_RECORD_DELETED error and
the whole DELETE query to be aborted with an error.

Fixed by suppressing the HA_ERR_RECORD_DELETED error in
hy_myisam::index_next_same() and ha_myisammrg::index_next_same(). Since
HA_ERR_RECORD_DELETED can only be returned by MyISAM, there is no point
in filtering this error in the SQL layer.


mysql-test/r/merge.result:
  Added a test case for bug #28837.
mysql-test/r/myisam.result:
  Added a test case for bug #28837.
mysql-test/t/merge.test:
  Added a test case for bug #28837.
mysql-test/t/myisam.test:
  Added a test case for bug #28837.
sql/ha_myisam.cc:
  Skip HA_ERR_RECORD_DELETED silently when calling mi_rnext_same().
sql/ha_myisammrg.cc:
  Skip HA_ERR_RECORD_DELETED silently when calling mi_rnext_same().
2007-11-26 18:58:54 +03:00
unknown
185b9efe8c merge of 5.0-opt to 5.1-opt 2007-11-26 16:06:46 +02:00
unknown
6b4a0f2595 Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.1-opt
into  magare.gmz:/home/kgeorge/mysql/autopush/B32036-5.1-opt
2007-11-26 16:02:32 +02:00
unknown
b7a2960fee Merge magare.gmz:/home/kgeorge/mysql/work/B32036-5.0-opt
into  magare.gmz:/home/kgeorge/mysql/work/B32036-5.1-opt


mysql-test/r/subselect.result:
  merged fix for bug 32036 to 5.1-opt
mysql-test/t/subselect.test:
  merged fix for bug 32036 to 5.1-opt
sql/sql_yacc.yy:
  merged fix for bug 32036 to 5.1-opt
2007-11-26 13:48:22 +02:00
unknown
f3f9855d13 Bug #32036: EXISTS within a WHERE clause with a UNION
crashes MySQL 5.122
There was a difference in how UNIONs are handled
on top level and when in sub-query.
Because the rules for sub-queries were syntactically
allowing cases that are not currently supported by
the server we had crashes (this bug) or wrong results
(bug 32051).
Fixed by making the syntax rules for UNIONs match the 
ones at top level.

These rules however do not support nesting UNIONs, e.g.
(SELECT a FROM t1 UNION ALL SELECT b FROM t2) 
 UNION
(SELECT c FROM t3 UNION ALL SELECT d FROM t4)
Supports for statements with nested UNIONs will be
added in a future version.


mysql-test/r/subselect.result:
  Bug #32036: test case
mysql-test/t/subselect.test:
  Bug #32036: test case
sql/sql_yacc.yy:
  Bug #32036: Make the syntax rules for UNIONs in subqueries the same
  as for top level UNIONs.
2007-11-26 13:36:24 +02:00
unknown
9eb12eb945 Merge magare.gmz:/home/kgeorge/mysql/work/B32268-5.0-opt
into  magare.gmz:/home/kgeorge/mysql/work/B32268-5.1-opt


mysql-test/r/group_min_max.result:
  Auto merged
mysql-test/t/group_min_max.test:
  Auto merged
sql/sql_select.cc:
  Auto merged
2007-11-26 13:33:36 +02:00
unknown
aab5779bca Bug#30152 MySQLD crash duing alter table causes DROP DATABASE to FAIL due to temp file(addon)
result fix


mysql-test/r/drop.result:
  result fix
2007-11-26 12:56:31 +04:00
unknown
11bd8594c2 Merge bk@192.168.21.1:mysql-5.1-opt
into  mysql.com:/home/hf/work/30284/my51-30284


mysql-test/r/gis.result:
  merging
mysql-test/t/gis.test:
  merging
2007-11-24 15:02:23 +04:00
unknown
ff5120f0fe Merge mysql.com:/home/hf/work/30284/my50-30284
into  mysql.com:/home/hf/work/30284/my51-30284


mysql-test/r/gis.result:
  Auto merged
mysql-test/t/gis.test:
  Auto merged
storage/myisam/mi_check.c:
  Auto merged
2007-11-24 14:57:51 +04:00
unknown
e4dc9a8e6e merging fix
mysql-test/r/gis.result:
  result fixed
mysql-test/t/gis.test:
  test fixed
2007-11-24 14:57:09 +04:00
unknown
d04f74b775 Merge mysql.com:/home/hf/work/30284/my41-30284
into  mysql.com:/home/hf/work/30284/my50-30284


myisam/mi_check.c:
  Auto merged
mysql-test/t/gis.test:
  Auto merged
mysql-test/r/gis.result:
  SCCS merged
2007-11-24 14:47:32 +04:00
unknown
86823d74b1 Merge sgluhov@bk-internal.mysql.com:/home/bk/mysql-5.1-opt
into  mysql.com:/home/gluh/MySQL/Merge/5.1-opt
2007-11-23 18:21:55 +04:00
unknown
9a34c80e11 Bug#30152 MySQLD crash duing alter table causes DROP DATABASE to FAIL due to temp file
disable decoding of table name if the table is internal temporary table


mysql-test/r/drop.result:
  test result
mysql-test/t/drop.test:
  test case
sql/sql_db.cc:
  check is the name is internal tmp table name
sql/sql_table.cc:
  disable decoding of table name if the table is internal temporary table
sql/table.h:
  added flag which is true when table name is the name of internal temporary table
2007-11-23 18:21:24 +04:00
unknown
042a58e049 Merge magare.gmz:/home/kgeorge/mysql/work/B32400-5.0-opt
into  magare.gmz:/home/kgeorge/mysql/work/B32400-5.1-opt


BitKeeper/deleted/.del-ps_6bdb.result:
  Auto merged
mysql-test/r/ps_2myisam.result:
  Auto merged
mysql-test/r/ps_3innodb.result:
  Auto merged
mysql-test/r/ps_4heap.result:
  Auto merged
mysql-test/r/ps_5merge.result:
  Auto merged
mysql-test/suite/ndb/r/ps_7ndb.result:
  Auto merged
sql/item.cc:
  Auto merged
tests/mysql_client_test.c:
  Auto merged
mysql-test/t/subselect.test:
  merge of bug 32400 to 5.1-opt
2007-11-23 14:41:47 +02:00
unknown
339e8f5d63 merge 5.0-opt -> 5.1-opt 2007-11-23 13:40:53 +02:00
unknown
c00bfc3bee Merge magare.gmz:/home/kgeorge/mysql/work/mysql-5.0-opt
into  magare.gmz:/home/kgeorge/mysql/work/merge-5.1-opt


mysql-test/r/gis.result:
  Auto merged
mysql-test/r/type_bit.result:
  Auto merged
mysql-test/r/type_blob.result:
  Auto merged
mysql-test/t/gis.test:
  Auto merged
mysql-test/t/type_bit.test:
  Auto merged
mysql-test/t/type_blob.test:
  Auto merged
sql/item.h:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_string.cc:
  Auto merged
tests/mysql_client_test.c:
  Auto merged
mysql-test/r/subselect.result:
  null merge. resolve latete.
mysql-test/t/subselect.test:
  merge 5.0-opt -> 5.1-opt
sql/key.cc:
  merge 5.0-opt -> 5.1-opt
sql/sql_class.h:
  merge 5.0-opt -> 5.1-opt
sql/sql_insert.cc:
  merge 5.0-opt -> 5.1-opt
sql/sql_table.cc:
  merge 5.0-opt -> 5.1-opt
2007-11-23 12:26:19 +02:00
unknown
a197c4e95d opt_range.cc:
Fix for the bug#31048 for 64bit platforms.
subselect.test, subselect.result:
  Corrected text case for the bug#31048.


mysql-test/t/subselect.test:
  Corrected text case for the bug#31048.
mysql-test/r/subselect.result:
  Corrected text case for the bug#31048.
sql/opt_range.cc:
  Fix for the bug#31048 for 64bit platforms.
2007-11-23 00:16:17 +03:00
unknown
a7c04594b8 Fixed bug #32556: assert in "using index for group-by" :
is_last_prefix <= 0, file .\opt_range.cc.

SELECT ... GROUP BY bit field failed with an assertion if the
bit length of that field was not divisible by 8.



sql/key.cc:
  Fixed bug #32556.
  Copying of "uneven" bits of a bit field was duplicated in the
  key_copy() and in the Field_bit::get_key_image().
  So, instead of copying of the rest of a bit field, 
  Field_bit::get_key_image() copied "uneven" bits to key image again,
  and the lowest field byte was not copied to key at all.
  
  Duplicated code has been removed from the key_copy function.
mysql-test/t/type_bit.test:
  Added test case for bug #32556.
mysql-test/r/type_bit.result:
  Added test case for bug #32556.
2007-11-21 22:56:42 +04:00
unknown
16f15dba44 merge of bug 30788 to 5.1-opt 2007-11-21 15:56:45 +02:00
unknown
4b9106764d Merge magare.gmz:/home/kgeorge/mysql/work/B30788-5.0-opt
into  magare.gmz:/home/kgeorge/mysql/work/B30788-5.1-opt


mysql-test/r/subselect3.result:
  Auto merged
sql/item.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/subselect.result:
  merge of bug 30788 to 5.1-opt
mysql-test/t/subselect.test:
  merge of bug 30788 to 5.1-opt
2007-11-21 13:19:50 +02:00
unknown
bb3e878159 Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.0-opt
into  magare.gmz:/home/kgeorge/mysql/autopush/B30788-5.0-opt


sql/item.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/subselect.result:
  merge of 5.0-opt
mysql-test/t/subselect.test:
  merge of 5.0-opt
2007-11-21 11:46:15 +02:00
unknown
e9832ceeac Bug #30788: Inconsistent retrieval of char/varchar
Index lookup does not always guarantee that we can
simply remove the relevant conditions from the WHERE
clause. Reasons can be e.g. conversion errors, 
partial indexes etc. 
The optimizer was removing these parts of the WHERE 
condition without any further checking.
This leads to "false positives" when using indexes.
Fixed by checking the index reference conditions
(using WHERE) when using indexes with sub-queries.


mysql-test/r/subselect.result:
  Bug #30788: 
   - using where
   - test case
mysql-test/r/subselect3.result:
  Bug #30788: using where
mysql-test/t/subselect.test:
  Bug #30788: test case
sql/item.h:
  Bug #30788: 
   - Declare eq() method of Item_cache descendants : this is used in
   test_if_ref()
   - preserve the field that is being cached for type comparisions
sql/sql_select.cc:
  Bug #30788: Don't remove the WHERE when using index lookup 
  with subqueries.
2007-11-21 11:40:05 +02:00
unknown
870d46819e Bug #32400: Complex SELECT query returns correct result
only on some occasions

Referencing an element from the SELECT list in a WHERE 
clause is not permitted. The namespace of the WHERE
clause is the table columns only. This was not enforced
correctly when resolving outer references in sub-queries.

Fixed by not allowing references to aliases in a 
sub-query in WHERE.


mysql-test/include/ps_query.inc:
  Bug #32400: fixed old test queries
mysql-test/r/ps_2myisam.result:
  Bug #32400: fixed old test queries
mysql-test/r/ps_3innodb.result:
  Bug #32400: fixed old test queries
mysql-test/r/ps_4heap.result:
  Bug #32400: fixed old test queries
mysql-test/r/ps_5merge.result:
  Bug #32400: fixed old test queries
mysql-test/r/ps_6bdb.result:
  Bug #32400: fixed old test queries
mysql-test/r/ps_7ndb.result:
  Bug #32400: fixed old test queries
mysql-test/r/subselect.result:
  Bug #32400: test case
mysql-test/t/subselect.test:
  Bug #32400: test case
sql/item.cc:
  Bug #32400: don't allow references to aliases in WHERE
tests/mysql_client_test.c:
  Bug #32400: fixed old test queries
2007-11-20 19:18:21 +02:00
unknown
2fd89a7239 Merge gleb.loc:/work/bk/5.0-opt-32533
into  gleb.loc:/work/bk/5.0-opt
2007-11-20 20:46:30 +04:00
unknown
0a91f285ad Fixed bug #32533.
8bit escape characters, termination and enclosed characters
were silently ignored by SELECT INTO query, but LOAD DATA INFILE
algorithm is 8bit-clean, so data was corrupted during 
encoding.


sql/sql_class.cc:
  Fixed bug #32533.
  SELECT INTO OUTFILE encoding was not 8bit clear, it
  has been fixed for a symmetry with the LOAD DATA INFILE
  decoding algorithm.
mysql-test/t/outfile_loaddata.test:
  Added test case for bug #32533.
mysql-test/r/outfile_loaddata.result:
  Added test case for bug #32533.
2007-11-20 20:15:20 +04:00
unknown
70e228763b Merge spetrunia@bk-internal.mysql.com:/home/bk/mysql-5.1-opt
into  mysql.com:/home/psergey/mysql-5.1-bug30573
2007-11-20 17:26:15 +03:00
unknown
429abc5845 Bug #32268: Indexed queries give bogus MIN and MAX results
Loose index scan does the grouping so the temp table does 
not need to do it, even when sorting.
Fixed by checking if the grouping is already done before
doing sorting and grouping in a temp table and do only 
sorting.


mysql-test/r/group_min_max.result:
  Bug #32268: test case
mysql-test/t/group_min_max.test:
  Bug #32268: test case
sql/sql_select.cc:
  Bug #32268: don't group in the temp table if already done
2007-11-20 16:07:24 +02:00
unknown
a8dd1299cc test case added for the bug #31155
mysql-test/r/gis.result:
  test result complete
mysql-test/t/gis.test:
  test case added for the bug
2007-11-20 17:04:24 +04:00
unknown
e3c44e3e21 Merge mysql.com:/home/hf/work/32211/my51-32211
into  mysql.com:/home/hf/work/31868/my51-31868
2007-11-20 14:48:49 +04:00
unknown
0b22925cc0 BUG#30573: Ordered range scan over partitioned tables returns some rows twice
The problem: ha_partition::read_range_first() could return a record that is 
outside of the scanned range. If that record happened to be in the next 
subsequent range, it would satisfy the WHERE and appear in the output twice.
(we would get it the second time when scanning the next subsequent range)

Fix: 
Made ha_partition::read_range_first() check if the returned recod is within
the scanned range, like other read_range_first() implementations do.


mysql-test/r/partition_range.result:
  BUG#30573: Ordered range scan over partitioned tables returns some rows twice
   - Testcase
mysql-test/t/partition_range.test:
  BUG#30573: Ordered range scan over partitioned tables returns some rows twice
   - Testcase
sql/ha_partition.cc:
  BUG#30573: Ordered range scan over partitioned tables returns some rows twice
  - Make ha_partition::read_range_first() check if the returned record is 
    within the range.
2007-11-20 05:02:49 +03:00
unknown
b3347a6a98 Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-5.0-opt
into  moonbone.local:/work/31048-bug-5.0-opt-mysql


sql/item_subselect.cc:
  Auto merged
mysql-test/r/subselect.result:
  Manual merge
mysql-test/t/subselect.test:
  Manual merge
2007-11-19 21:15:53 +00:00
unknown
13105534fa Bug#31048: Many nested subqueries may cause server crash.
This bug is actually two. The first one manifests itself on an EXPLAIN
SELECT query with nested subqueries that employs the filesort algorithm.
The whole SELECT under explain is marked as UNCACHEABLE_EXPLAIN to preserve
some temporary structures for explain. As a side-effect of this values of
nested subqueries weren't cached and subqueries were re-evaluated many
times. Each time buffer for filesort was allocated but wasn't freed because
freeing occurs at the end of topmost SELECT. Thus all available memory was
eaten up step by step and OOM event occur.
The second bug manifests itself on SELECT queries with conditions where
a subquery result is compared with a key field and the subquery itself also
has such condition. When a long chain of such nested subqueries is present
the stack overrun occur. This happens because at some point the range optimizer
temporary puts the PARAM structure on the stack. Its size if about 8K and
the stack is exhausted very fast.

Now the subselect_single_select_engine::exec function allows subquery result
caching when the UNCACHEABLE_EXPLAIN flag is set.
Now the SQL_SELECT::test_quick_select function calls the check_stack_overrun
function for stack checking purposes to prevent server crash.


mysql-test/t/subselect.test:
  Added a test case for the bug#31048: Many nested subqueries may cause server crash.
mysql-test/r/subselect.result:
  Added a test case for the bug#31048: Many nested subqueries may cause server crash.
sql/opt_range.cc:
  Bug#31048: Many nested subqueries may cause server crash.
  Now the SQL_SELECT::test_quick_select function calls the check_stack_overrun
  function for stack checking purposes to preven server crash.
sql/item_subselect.cc:
  Bug31048: Many nested subqueries may cause server crash.
  Now the subselect_single_select_engine::exec function allows subquery result
  caching when the UNCACHEABLE_EXPLAIN flag is set.
2007-11-19 20:00:25 +00:00
unknown
ea73989828 Fixed bug #32282: TEXT silently truncates when value is exactly 65536
bytes length.

The server has been modified to report warnings on truncation to
65536 bytes as usual.



sql/sql_string.cc:
  Fixed bug #32282.
  The well_formed_copy_nchars function returned an incorrect value
  of copied bytes of the truncated input string: extra length of
  the first truncated character added to the *from_end_pos pointer.
  That has been fixed.
mysql-test/r/type_blob.result:
  Added test case for bug #32282.
mysql-test/t/type_blob.test:
  Added test case for bug #32282.
2007-11-19 21:34:21 +04:00
unknown
da1efa3387 Bug #30284 spatial key corruption.
SPATIAL key is fine actually, but the chk_key() function
mistakenly returns error. It tries to compare checksums
of btree and SPATIAL keys while the checksum for the SPATIAL isn't
calculated (always 0). Same thing with FULLTEXT keys is handled
using full_text_keys counter, so fixed by counting both
SPATIAL and FULLTEXT keys in that counter.


myisam/mi_check.c:
  Bug #30284 spatial key corruption
  
  full_text_keys counts both FULL_TEXT and SPATIAL keys
mysql-test/r/gis.result:
  Bug #30284 spatial key corruption
  
  test result
mysql-test/t/gis.test:
  Bug #30284 spatial key corruption.
  
  test case
2007-11-19 11:03:03 +04:00