When converting DISTINCT to GROUP BY where the columns are from the covering
index and they are quoted twice in the SELECT list the optimizer is creating
improper processing sequence. This is because of the fact that the columns
of the covering index are not recognized as such and treated as non-index
columns.
Generally speaking duplicate columns can safely be removed from the GROUP
BY/DISTINCT list because this will not add or remove new rows in the
resulting set. Duplicates can be removed even if they are not consecutive
(as is the case for ORDER BY, where the duplicate columns can be removed
only if they are consecutive).
So we can safely transform "SELECT DISTINCT a,a FROM ... ORDER BY a" to
"SELECT a,a FROM ... GROUP BY a ORDER BY a" instead of
"SELECT a,a FROM .. GROUP BY a,a ORDER BY a". We can even transform
"SELECT DISTINCT a,b,a FROM ... ORDER BY a,b" to
"SELECT a,b,a FROM ... GROUP BY a,b ORDER BY a,b".
The fix to this bug consists of checking for duplicate columns in the SELECT
list when constructing the GROUP BY list in transforming DISTINCT to GROUP
BY and skipping the ones that are already in.
mysql-test/r/distinct.result:
test case for the bug without loose index scan
mysql-test/r/group_min_max.result:
test case for the bug
mysql-test/t/distinct.test:
test case for the bug without loose index scan
mysql-test/t/group_min_max.test:
test case for the bug
sql/sql_select.cc:
duplicates check and removal
Bug#17667: An attacker has the opportunity to bypass query logging.
This adds a new, local-only printf format specifier to our *printf functions
that allows us to print known-size buffers that must not be interpreted as
NUL-terminated "strings."
It uses this format-specifier to print to the log, thus fixing this
problem.
include/my_sys.h:
Add prototype for my_memmem() .
mysys/Makefile.am:
Add reference to new file, my_memmem.c
mysys/mf_iocache2.c:
Add a "%.1234b" and "%.*b" percent-code. It takes a width, just like "%s",
but unlike the string-indicator, it requires the width and doesn't stop printing
at NUL characters.
Also, simplify the code a bit.
TODO: This code should be unified with the strings/my_vnsprintf.c code in
the future.
sql/sql_parse.cc:
The query is not a C-string, but is a sized buffer, containing any character
at all, which may include NUL characters.
strings/my_vsnprintf.c:
Add a "%.1234b" and "%.*b" percent-code. It takes a width, just like "%s",
but unlike the string-indicator, it requires the width and doesn't stop printing
at NUL characters.
tests/Makefile.am:
We may need some of our local functions.
tests/mysql_client_test.c:
Add a "%.1234b" and "%.*b" percent-code. It takes a width, just like "%s",
but unlike the string-indicator, it requires the width and doesn't stop printing
at NUL characters.
mysql-test/t/mysql_client_test.opt:
New BitKeeper file ``mysql-test/t/mysql_client_test.opt''
Add '--log' server parameter.
mysys/my_memmem.c:
New BitKeeper file ``mysys/my_memmem.c''
Implement memmem, a black-box work-alike of the GNU memmem(), which functions
like strstr() but for arbitrary blocks of memory.
into zippy.(none):/home/cmiller/work/mysql/merge/mysql-5.0
mysql-test/r/null.result:
Auto merged
mysql-test/t/null.test:
Auto merged
sql/sql_table.cc:
Merge.
Now test for NULLness the pointers returned from objects created from the
default value. Pushing patch on behalf of cmiller.
mysql-test/r/null.result:
Add test case
mysql-test/t/null.test:
Add test case
sql/sql_table.cc:
No longer blindly dereference pointer of the string representation of the
values, where "NULL" is NUL. Raise INVALID DEFAULT error messages where
appropriate.
Note that the -O1 optimization flag made debugging this extremely tricky, with
misleading results, and that removing it from the Makefile during debugging can
be invaluable.
In the code that converts IN predicates to EXISTS predicates it is changing
the select list elements to constant 1. Example :
SELECT ... FROM ... WHERE a IN (SELECT c FROM ...)
is transformed to :
SELECT ... FROM ... WHERE EXISTS (SELECT 1 FROM ... HAVING a = c)
However there can be no FROM clause in the IN subquery and it may not be
a simple select : SELECT ... FROM ... WHERE a IN (SELECT f(..) AS
c UNION SELECT ...) This query is transformed to : SELECT ... FROM ...
WHERE EXISTS (SELECT 1 FROM (SELECT f(..) AS c UNION SELECT ...)
x HAVING a = c) In the above query c in the HAVING clause is made to be
an Item_null_helper (a subclass of Item_ref) pointing to the real
Item_field (which is not referenced anywhere else in the query anymore).
This is done because Item_ref_null_helper collects information whether
there are NULL values in the result. This is OK for directly executed
statements, because the Item_field pointed by the Item_null_helper is
already fixed when the transformation is done. But when executed as
a prepared statement all the Item instances are "un-fixed" before the
recompilation of the prepared statement. So when the Item_null_helper
gets fixed it discovers that the Item_field it points to is not fixed
and issues an error. The remedy is to keep the original select list
references when there are no tables in the FROM clause. So the above
becomes : SELECT ... FROM ... WHERE EXISTS (SELECT c FROM (SELECT f(..)
AS c UNION SELECT ...) x HAVING a = c) In this way c is referenced
directly in the select list as well as by reference in the HAVING
clause. So it gets correctly fixed even with prepared statements. And
since the Item_null_helper subclass of Item_ref_null_helper is not used
anywhere else it's taken out.
mysql-test/r/ps_11bugs.result:
Test case for the bug
mysql-test/r/subselect.result:
Explain updated because of the tranformation
mysql-test/t/ps_11bugs.test:
Testcase for the bug
sql/item.cc:
Taking out Item_null_helper as it's no longer needed
sql/item.h:
Taking out Item_null_helper as it's no longer needed
sql/item_subselect.cc:
The described change to the IN->EXISTS transformation
into shellback.(none):/home/msvensson/mysql/mysql-5.0-maint
client/mysql.cc:
Auto merged
configure.in:
Auto merged
extra/yassl/include/openssl/rsa.h:
Auto merged
extra/yassl/include/yassl_int.hpp:
Auto merged
extra/yassl/include/yassl_types.hpp:
Auto merged
extra/yassl/src/template_instnt.cpp:
Auto merged
extra/yassl/taocrypt/include/integer.hpp:
Auto merged
extra/yassl/taocrypt/include/misc.hpp:
Auto merged
extra/yassl/taocrypt/src/algebra.cpp:
Auto merged
extra/yassl/taocrypt/src/template_instnt.cpp:
Auto merged
mysql-test/t/disabled.def:
Auto merged
sql/set_var.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
extra/yassl/include/openssl/ssl.h:
Manual merge
extra/yassl/src/handshake.cpp:
Manual merge
extra/yassl/src/yassl_int.cpp:
Manual merge
extra/yassl/taocrypt/include/runtime.hpp:
Manual merge
extra/yassl/taocrypt/src/integer.cpp:
Manual merge
mysql-test/mysql-test-run.pl:
Manual merge
mysql-test/r/trigger.result:
Manual merge
mysql-test/t/trigger.test:
Manual merge
Then check in have_udf if that variable is set. Finally use tahe variable when loading the shared library.
mysql-test/include/have_udf.inc:
Add check if udf_example.so(or similar) is available
mysql-test/lib/mtr_misc.pl:
Add funcion "mtr_file_exist" to search for files
mysql-test/mysql-test-run.pl:
Add checks to find the udf_example.so library
mysql-test/r/udf.result:
Update result
mysql-test/t/disabled.def:
Remove udf.test from disabled tests
mysql-test/t/udf.test:
Use variable UDF_EXAMPLE_LIB when looking for shared library to load
mysql-test/r/have_udf_example.require:
New BitKeeper file ``mysql-test/r/have_udf_example.require''
into mysql.com:/home/jimw/my/mysql-5.0-clean
sql/item_func.cc:
Auto merged
sql/set_var.cc:
Auto merged
mysql-test/r/variables.result:
Resolve conflict
mysql-test/t/variables.test:
Resolve conflict
This patch simply adds sql_big_selects to the list of variables
output by SHOW VARIABLES.
mysql-test/r/variables.result:
Update results
mysql-test/t/variables.test:
Add new regression test (and make end-of-tests marker add output)
sql/set_var.cc:
Add sql_big_selects to SHOW VARIABLES output
Use files innodb_mysql.[test|result] instead.
mysql-test/t/innodb.test:
This file is to be used by Innobase only.
mysql-test/r/innodb_mysql.result:
New BitKeeper file ``mysql-test/r/innodb_mysql.result''
Use this file instead of innodb.result.
mysql-test/t/innodb_mysql.test:
New BitKeeper file ``mysql-test/t/innodb_mysql.test''
Use this file instead of innodb.test.
too much memory. Instead, either create the equvalent SEL_TREE manually, or create only two ranges that
strictly include the area to scan
(Note: just to re-iterate: increasing NOT_IN_IGNORE_THRESHOLD will make optimization run slower for big
IN-lists, but the server will not run out of memory. O(N^2) memory use has been eliminated)
mysql-test/r/func_in.result:
Testcase for BUG#15872
mysql-test/t/func_in.test:
Testcase for BUG#15872
sql/item.cc:
BUG#15872: Added Item_decimal::set_decimal_value()
sql/item.h:
UG#15872: Added Item_decimal::set_decimal_value()
sql/item_cmpfunc.h:
BUG#15872: Added in_vector::create_item(), in_vector::value_to_item() and their implementations in concrete
classes.
sql/opt_range.cc:
BUG#15872: Don't run the range analyzer on "t1.keypart NOT IN (const1, ..., )", as that
consumes too much memory. Instead, either
A) create the equivalent SEL_TREE manually, making use of the fact that item_not_in->array
has an ordered IN-list, or
B) create only two ranges: (-inf|NULL) < X < min_value_from_in_list, max_value_from_in_list < X
(Choose #B if the IN-list has > 10K elements)
into mysql.com:/usr/local/mysql/mysql-5.0-mtr-fix
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/t/case.test:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
mysql-test/r/case.result:
SCCS merged
Looks like the trigger.test works that way
mysql-test/t/information_schema.test:
Test it it works better to set no read access for a file by using 000 instead of -r
- Add test to see if tests are running with root permissions
- Disables tests that uses chmod if that is the case
mysql-test/mysql-test-run.pl:
Add test to check if mysql-test-run is run with root permission.
Set environment variable MYSQL_TEST_ROOT to 'YES' or 'NO'.
mysql-test/t/information_schema.test:
Disable test if running as root
mysql-test/t/rpl_rotate_logs.test:
Disable test if running as root.
mysql-test/include/not_as_root.inc:
New BitKeeper file ``mysql-test/include/not_as_root.inc''
mysql-test/r/not_as_root.require:
New BitKeeper file ``mysql-test/r/not_as_root.require''
into mysql.com:/usr_rh9/home/elkin.rh9/MySQL/Merge/5.0
mysql-test/r/rpl_temporary.result:
Auto merged
mysql-test/t/rpl_temporary.test:
Auto merged
sql/sql_base.cc:
Auto merged
The fix refines the algorithm of generating DROPs for binlog.
Temp tables with common pseudo_thread_id are clustered into one query.
Consequently one replication event per pseudo_thread_id is generated.
mysql-test/r/rpl_temporary.result:
results
mysql-test/t/rpl_temporary.test:
Creating temp tables associated with a set of pseudo_thread_id values within a connection.
The aim is to see that slave digest master's binlog consisting of DROP temprorary tables.
sql/sql_base.cc:
close_temporary_tables is rewritten to generate sequence of DROP temprorary tables with common preudo_thread_id stored in temp table definition.
Backporting a changeset made for 5.0. Comments from there:
The fix refines the algorithm of generating DROPs for binlog.
Temp tables with common pseudo_thread_id are clustered into one query.
Consequently one replication event per pseudo_thread_id is generated.
mysql-test/r/rpl_temporary.result:
results changed
mysql-test/t/rpl_temporary.test:
test to generate problematic drop in binlog to feed it to restarting slave
to see no stop.
sql/sql_base.cc:
change in drop temprorary tables alg in close_temporary_tables.
Error was emitted when one tried to select information from view which used
merge algorithm and which also had CONVERT_TZ() function in its select list.
This bug was caused by wrong assumption that global table list for view
which is handled using merge algorithm begins from tables belonging to
the main select of this view. Nowadays the above assumption is not true only
when one uses convert_tz() function in view's select list, but in future
other cases may be added (for example we may support merging of views
with subqueries in select list one day). Relying on this false assumption
led to the usage of wrong table list for field lookups and therefor errors.
With this fix we explicitly use pointer to the beginning of main select's
table list.
mysql-test/r/timezone_grant.result:
Added additional test case for bug#15153 "CONVERT_TZ() is not allowed in
all places in VIEWs" that checks that usage of CONVERT_TZ() function in view
does not require additional privileges.
mysql-test/r/view.result:
Added test case for bug#15153 "CONVERT_TZ() is not allowed in all places in
VIEWs".
mysql-test/t/timezone_grant.test:
Added additional test case for bug#15153 "CONVERT_TZ() is not allowed in
all places in VIEWs" that checks that usage of CONVERT_TZ() function in view
does not require additional privileges.
mysql-test/t/view.test:
Added test case for bug#15153 "CONVERT_TZ() is not allowed in all places in
VIEWs".
sql/sql_view.cc:
mysql_make_view():
We should not assume that global table list for view which is handled using
merge algorithm begins from tables belonging to the main select of this
view. Nowadays the above assumption is not true only when one uses
convert_tz() function in view's select list, but in future other cases
may be added (for example we may support merging of views with subqueries
in select list one day). So let us instead explicitly use pointer to the
beginning of main select's table list.
Make InnoDB option "loose", as the server might be
started with this option just to find out the test
is to be skipped in the configuration (bug#17359)
mysql-test/t/innodb_unsafe_binlog-master.opt:
Make InnoDB option "loose", as the server might be
started with this option just to find out the test
is to be skipped in the configuration (bug#17359)
Do not reset value of LAST_INSERT_ID() in sub-statement.
mysql-test/r/rpl_insert_id.result:
Add result for bug#15728.
mysql-test/r/sp.result:
Add result for bug#15728.
mysql-test/t/rpl_insert_id.test:
Add test case for bug#15728.
mysql-test/t/sp.test:
Add test case for bug#15728.
sql/sql_class.cc:
Do not reset value of LAST_INSERT_ID() in sub-statement.