prepared statements when LIMIT is used" and post-review comments.
The fix changes the approach we calculate the need for ORDER BY
in UNION: the previous was not PS friendly, as it damaged SELECT_LEX
options in case of single select.
mysql-test/r/ps.result:
Test results fixed: the test case for Bug#6088
mysql-test/r/subselect.result:
Test results fixed: now we don't perform ORDER BY for parts of UNION
if there is no LIMIT clause.
mysql-test/t/ps.test:
A test case for Bug#6088 "FOUND_ROWS returns wrong values for
prepared statements when LIMIT is used".
sql/sql_union.cc:
The actual fix for Bug#6088:
- don't modify SELECT_LEX'es
- use boolean variable can_skip_order_by to check if we can skip
ORDER BY in UNION
sql/item.cc:
Fix valgrind errors: we need Item::name to point to PS memory
as well.
sql/item.h:
set_field no longer can be reused as is for PS purposes.
sql/sql_union.cc:
Item_field::set_field -> Item_field::reset_field.
crashes server"
(in 4.0 we fix only connection stalling in case of error, crash itself is
fixed in 4.1, the test case for this code is also there).
sql/sql_parse.cc:
Handling of COM_CREATE_DB, COM_DROP_DB:
We should call send_error() if mysql_create_db or mysql_drop_db
return error (like we do it for SQL versions of these commands).
names with ident. tables fr. diff. schemata": revise all uses of
Item_field and make them prepared-statements friendly when necessary.
mysql-test/r/ps.result:
Test results fixed: the test case for Bug#6050
mysql-test/r/ps_1general.result:
Test results fixed: in prepared statements we expand '*' to a list
of fully qualified fields (db.table.column).
mysql-test/t/ps.test:
A test for Bug#6050 "EXECUTE stmt reports ambiguous fieldnames with
ident. tables fr. diff. schemata"
sql/item.cc:
Revise all Item_field constructors: we need to make sure that no Item_field
object points to unaccessible memory in prepared statements.
sql/item.h:
Revise all Item_field constructors: we need to make sure that no Item_field
object points to unaccessible memory in prepared statements.
sql/sql_base.cc:
Item_field use changed to be prepared statements friendly.
sql/sql_class.h:
New check of Item_arena state.
sql/sql_union.cc:
Fixing the problem with name resolving in UNION and prepared statements:
In case of SELECT a, b, c FROM t1 UNION SELECT a, b, c FROM t2 the list of
selected items is represented as a List<Item_field>, where each
Item_field points to a field of temporary table.
But the temporary table is created anew on each execution of the prepared
statement. So on each subsequent execution we should reset Item_field
items to point to fields from freshly-created temporary table.
sql/table.h:
Comment TABLE member.
Add typecast from ulint to ssize_t in pread and pwrite, so that the type is according to the Linux man page; this will probably not help to fix the HP-UX 32-bit pwrite failure, since the compiler should do the appropriate typecasts anyway
innobase/os/os0file.c:
Add typecast from ulint to ssize_t in pread and pwrite, so that the type is according to the Linux man page; this will probably not help to fix the HP-UX 32-bit pwrite failure, since the compiler should do the appropriate typecasts anyway
this timestamp might not be the correct time because e.g. ALTER TABLE
changes this timestamp.
sql/ha_innodb.cc:
Do not show check_time and update_time because we do not really know them.
UPDATE, INSERT and CHECK TABLE do not change these timestamps.
Added SQLSTATE matching support to test engine
mysqltest.result, mysqltest.test:
new file
mysql-test/t/mysqltest.test:
Added SQLSTATE matching support to test engine
mysql-test/r/mysqltest.result:
Added SQLSTATE matching support to test engine
client/mysqltest.c:
Added SQLSTATE matching support to test engine
