Handling of large signed/unsigned values was not consistent, so some string functions could return bogus results.
The current fix is to simply patch up the val_str() methods for those string items.
It would be good clean this code up in general, to make similar problems much harder to make. This is left as an exercise for the reader.
Fixed compiler warnings.
In set_var.cc, the code was not properly returning an error code
if close_cached_tables() failed.
In sql_tables.cc, the code was not returning properly an error code
if lock_table_names() failed.
Both cases are bugs, introduced in 5.1 only by recent changes.
If SELECT-part of CREATE VIEW statement contains '\Z',
it is not handled correctly.
The problem was in String::print().
Symbol with code 032 (26) is replaced with '\z',
which is not supported by the lexer.
The fix is to replace the symbol with '\Z'.
Applied innodb-5.0-ss1040 and innodb-5.0-ss1099 snapshots.
Bugs fixed:
- Bug #21468: InnoDB crash during recovery with corrupted data pages: XA bug?
- Bug #24299: Identifiers in foreign keys cannot contain U+0160, U+0360, ..., U+FF60
- Bug #24386: Performance degradation caused by instrumentation in mutex_struct
- Bug #24712: SHOW TABLE STATUS for file-per-table showing incorrect time fields
when REORGANIZE creates new partition, no_subparts for that partition
isn't set right (call handler::set_partitions_defaults always returns 1)
Normally the number of subpartitions should be inherited from the
table.
the UDF
When deleting a user defined function MySQL must remove it from both the
in-memory hash table and the mysql.proc system table.
Finding (and removal therefore) from the internal hash table is case
insensitive (or whatever the default charset is), whereas finding and
removal from the system table is case sensitive.
As a result if you supply a function name that is not in the same character
case to DROP FUNCTION the server will remove the function only from the
in-memory hash table and will keep the row in mysql.proc system table.
This will cause inconsistency between the two structures (that is fixed
only by restarting the server).
Fixed by using the name in the precise case (from the in-memory hash table)
to delete the row in the mysql.proc system table.
Problem:
When creating a temporary field for a temporary table in create_tmp_field_from_field(), a resulting field is created as an exact copy of an original one (in Field::new_field()). However, Field_enum and Field_set contain a pointer (typelib) to memory allocated in the parent table's MEM_ROOT, which under some circumstances may be deallocated later by the time a temporary table is used.
Solution:
Override the new_field() method for Field_enum and Field_set and create a separate copy of the typelib structure in there.
Blocked evaluation of constant objects of the classes
Item_func_is_null and Item_is_not_null_test at the
prepare phase in the cases when the objects used subqueries.
Removed an assertion that was not valid for the cases where the query
in a prepared statement contained a single-row non-correlated
subquery that was used as an argument of the IS NULL predicate.
