Added test cases for bug #6474.
sql_select.cc:
Fixed bug #6474. A wrong result was returned when a query
contained the same equality of the form field=const on
different AND levels.
Added push_back(void *, MEM_ROOT *) to make some list-handling code easier that needs to be allocated in a different mem-root
(Before one had to change thd->mem_root ; push_back(); restore mem_root.
locks all rows (BUG #3300). When using innobase_locks_unsafe_for_binlog
option InnoDB does not take locks for those rows which do not
belong to the result set or werent changed by the query. This fix removes
unnecessary locks also from SELECT and DELETE queries.
Now thd->mem_root is a pointer to thd->main_mem_root and THR_MALLOC is a pointer to thd->mem_root.
This gives us the following benefits:
- Allow us to easily detect if arena has already been swapped before (this fixes a bug in setup_conds() where arena was swaped twice in some cases)
- Faster swaps of arenas (as we don't have to copy the whole MEM_ROOT)
- We don't anymore have to call my_pthread_setspecific_ptr(THR_MALLOC,...) to change where memory is alloced. Now it's enough to set thd->mem_root
Included header fnmatch.h on Unix
Changed C++ comments to C comments
Corrected indentation of code written on Windows
Split up lines to fit into 80 columns
Initiated some variables to avoid warnings
Added __attribute__((unused)) to unused function parameters
Replace tab characters with space
Put space after 'for', 'while' etc
Added value to 'return' from non void function removef()
On Unix strlwr() was incorrectly declared and a no op,
replaced it with a macro that does nothing
Split several statements on the same line
Other minor changes to conform to coding standard
Added cases for bugs #6307 and #6460.
sql_select.cc:
Fixed the problem of bug reports #6307 and #6460.
The reported wrong result sets were due to the fact that
the added call of the fix_fields method for the built
AND condition that joined WHERE and ON conditions
broke ON expression, as it removed extra AND levels
in the built condition.
It looks like that no attributes of the built condition
are needed, so we don't have to call fix_fields here.
and blank after function name".
Crop fruits of copy-paste programming: pre-caching of stored functions
wasn't performed for prepared statements just because implementation
of prepared statements is done as an add-on to the main execution flow,
and the preload was originally implemented for main execution branch
only (mysql_execute_command).
of client equals to character set of connection, possibly required
conversion to character set of column is not performed
(prepared statements, data is supplied using placeholders).
