table resolution".
Added members to Item_ident for storing original db, table and field
names since those that set later from Field have shorter life-time
than required by prep. stmt. So we need to restore original names in
Item_ident::cleanup(). Also now using special construnctor for creation
of Item_field from Field object that ensures that table and field name
have big enough life-time.
"Fix" for bug #2050 "10 to 1 performance drop with server 4.1.1"
Clean ups in implementation of caching of field number in table.
Added caching of table in which field is found in find_field_in_tables().
Actually it is not a bug but right behavior observed as pefomance
degradation after we have forced Item_field::fix_fields() to
re-execute each time when we are executing prep stmt.
This patch implements small optimization which heals this bad
behavior. We are caching field position in TABLE::field array in
Item's member and are using this position for speeding up field
lookups in fix_fields() in case of its re-execution.
COM_EXECUTE packet" and #2795 "prepare + execute without bind_param crashes
server" and #2473 "seg fault running tests/client_test.c":
- length checking added to packet parser
- default impelemntation of Item_param::set_param_func will work in
case of malformed packet.
No test cases are possible in our test suite, as there are no tests
operating on protocol layer.
Cleaned up embedded library access and query cache handling
Changed min stack size to 128K (to allow longer MyISAM keys)
Fixed wrong priority for XOR (should be less than NEG to get -1^1 to work)
Don't dump data for MRG_ISAM or MRG_MYISAM tables. (Bug #1846)
Ensure that 'lower_case_table_names' is always set on case insensitive file systems. (Bug #1812)
One can now configure MySQL as windows service as a normal user. (Bug #1802)
Database names is now compared with lower case in ON clause when lower_case_table_names is set. (Bug #1736)
IGNORE ... LINES option didn't work when used with fixed length rows. (Bug #1704)
Change INSERT DELAYED ... SELECT... to INSERT .... SELECT (Bug #1983)
Safety fix for service 'mysql start' (Bug #1815)
and BUG#1654: Stored Procedure Crash if contains subquery and set function
Disallowed subselects in RETURN (for FUNCTIONs) and SET of local variables.
The latter should work, but turned out to be difficult to fix, so we just
disallow it for the time being.
Fixed compiler warnings (a lot of hidden variables detected by the Forte compiler)
Added a lot of 'version_xxx' strings to 'show variables'
Prevent copying of TMP_TABLE_PARAM (This caused core dump bug on Solaris)
Fixed problem with printing sub selects to debug log
We treat Item_param whose value is not set as non-const.
This allows us to avoid use of Item_param's value (not yet existing) in
those fix_fields and fix_length_and_dec that do calculations if their
Items arguments are const. So we can call fix_fields for such items from
mysql_prepare safely.
