Fixed bug #12144.
Added an optimization that avoids key access with null keys for the 'ref'
method when used in outer joins. The regilar optimization with adding
IS NOT NULL expressions is not applied for outer join on expressions as
the predicates of these expressions are not pushed down in 4.1.
null_key.result, null_key.test:
Added a test case for bug #12144.
(This is because conds may not be a constant)
This bug caused a failure in the test suite for select.test becasue for prepared statements in one case a 'constant sub query' was not regarded as a constant
Sanja will as a separate task check if we can fix that the sub query can be recognized as a constant
Bug #12217
Fixed bug #11412.
Reversed the patch of cs 1.1934 for the function
create_tmp_table. Modified the function to support
tem_ref objects created for view fields.
item_buff.cc:
Fixed bug #11412.
Modified implementation of new_Cached_item to support
cacheing of view fields.
item.h:
Fixed bug #11412.
Changed implementation of Item_ref::get_tmp_table_field and
added Item_ref::get_tmp_table_item to support Item_ref objects
created for view fields.
view.test, view.result:
Added a test case for bug #11412.
cursors. This should fix Bug#11813 when InnoDB part is in
(tested with a draft patch).
The idea of the patch is that if a storage engine supports
consistent read views, we open one when open a cursor,
set is as the active view when fetch from the cursor, and close
together with cursor close.
The idea of the patch
is that every cursor gets its own lock id for table level locking.
Thus cursors are protected from updates performed within the same
connection. Additionally a list of transient (must be closed at
commit) cursors is maintained and all transient cursors are closed
when necessary. Lastly, this patch adds support for deadlock
timeouts to TLL locking when using cursors.
+ post-review fixes.
Changed defaults option --instance to --defaults-group-suffix
Changed option handling to allow --defaults-file, --defaults-extra-file and --defaults-group-suffix to be given in any order
Changed MYSQL_INSTANCE to MYSQL_GROUP_SUFFIX
mysql_print_defaults now understands --defaults-group-suffix
Remove usage of my_tempnam() (not safe function)
if( -> if ( and while( to while (
Added a test case for bug #11745.
sql_select.cc:
Fixed bug # 11745.
Added support of where clause for queries with FROM DUAL.
sql_yacc.yy:
Fixed bug # 11745.
Added optional where clause for queries with FROM DUAL.
Fixed bug #11885.
sql_select.cc:
Fixed bug #11885.
Predicates of the forms 'a IN (v)' 'a NOT IN (v)' now
is replaced by 'a=v' and 'a<>v' at the parsing stage.
sql_yacc.yy:
Fixed bug #11885.
Predicates of the forms 'a IN (v)' 'a NOT IN (v)' now
is replaced by 'a=v' and 'a<>v' at the parsing stage.
disabled if ref is built with a key from the updated table
Problem was in add_not_null_conds() optimization function.
It contains following code:
JOIN_TAB *referred_tab= not_null_item->field->table->reginfo.join_tab;
...
add_cond_and_fix(&referred_tab->select_cond, notnull);
For UPDATE described in bug report referred_tab is 0 and dereferencing it
crashes the server.
than in previous 4.1.x
Wrongly applied optimization were adding NOT NULL constraint which results in
rejecting valid rows and reduced result set.
The problem was that add_notnull_conds() while checking subquery were adding
NOT NULL constraint to left joined table, to which, normally, optimization
don't have to be applied.
Added a test case for bug #11543.
sql_select.cc:
Fixed bug #11543.
A ROLLUP query could return a wrong result set when
its GROUP BY clause contained references to the same
column.
CURSOR_TYPE_READ_ONLY date/datetime filter server crash".
The fix adds support for Item_change_list in cursors (proper rollback
of the modified item tree).
Fixed the results of a test for group_concat.
After the fix foor bug #11639 the results became
correct.
olap.result, olap.test:
Added a test case for bug #11639.
sql_select.cc:
Fixed bug #11639: a wrong result set when using a view
instead of the underlying table in a rollup query
executed through filesort.
The old code did not take into account that we always
use an Item_ref object when referring to a view column.
item.h:
Fixed bug #11639.
Now if two Item_ref items ref1 and ref2 refer to the same field
then ref1->eq(ref2) returns 1.
bug #10617: Insert from same table to same table give incorrect result for bit(4) column.
bug #11091: union involving BIT: assertion failure in Item::tmp_table_field_from_field_type
bug #11572: MYSQL_TYPE_BIT not taken care of in temp. table creation for VIEWs
Added a test case for bug #11414.
sql_select.cc:
Fixed bug #11414: crash on Windows with some simple
GROUP BY queries.
It happened to an allocation of an array containing
0 Copy_field elements in setup_copy_fields.
The bug had been already fixed in 5.0.
The reason it happened was that both, JOIN::cleanup() and JOIN::join_free(),
went over all nested joins and called cleanup/join_free for them.
For that:
- split recursive and non-recursive parts of JOIN::cleanup() and
JOIN::join_free()
- rename JOIN::cleanup to JOIN::destroy, as it actually destroys its
argument
- move the recursive part of JOIN::cleanup to st_select_lex::cleanup
- move the non-recursive part of JOIN::join_free to the introduced
method JOIN::cleanup().
