type assertion.
The bug was introduced by the patch for bug #16377.
The "+ INTERVAL" (Item_date_add_interval) function detects its result type
by the type of its first argument. But in some cases it returns STRING
as the result type. This happens when, for example, the first argument is a
DATE represented as string. All this makes the get_datetime_value()
function misinterpret such result and return wrong DATE/DATETIME value.
To avoid such cases in the fix for #16377 the code that detects correct result
field type on the first execution was added to the
Item_date_add_interval::get_date() function. Due to this the result
field type of the Item_date_add_interval item stored by the send_fields()
function differs from item's result field type at the moment when
the item is actually sent. It causes an assertion failure.
Now the get_datetime_value() detects that the DATE value is returned by
some item not only by checking the result field type but also by comparing
the returned value with the 100000000L constant - any DATE value should be
less than this value.
Removed result field type adjusting code from the
Item_date_add_interval::get_date() function.
sql/item_cmpfunc.cc:
Bug#28450: The Item_date_add_interval in select list may fail the field
type assertion.
Now the get_datetime_value() detects that the DATE value is returned by
some item not only by checking the result field type but also by comparing
the returned value with the 100000000L constant - any DATE value should be
less than this value.
mysql-test/r/func_date_add.result:
Added a test case for the bug#28450: The Item_date_add_interval in select list may fail the field
type assertion.
sql/item_timefunc.cc:
Bug#28450: The Item_date_add_interval in select list may fail the field
type assertion.
Removed result field type adjusting code from the
Item_date_add_interval::get_date() function.
mysql-test/t/func_date_add.test:
Added a test case for the bug#28450: The Item_date_add_interval in select list may fail the field
type assertion.
longer showing SP names.
SHOW CREATE VIEW uses Item::print() methods to reconstruct the
statement text from the parse tree.
The print() method for stored procedure calls needs allocate
space to print the function's quoted name.
It was incorrectly calculating the length of the buffer needed
(was too short).
Fixed to reflect the actual space needed.
mysql-test/r/sp.result:
Bug #28605: test case
mysql-test/t/sp.test:
Bug #28605: test case
sql/item_func.cc:
Bug #28605: fixed the string length calculation
into bk-internal.mysql.com:/data0/bk/mysql-5.0-opt
client/mysqldump.c:
Auto merged
mysql-test/r/mysqldump.result:
Auto merged
mysql-test/r/ps_2myisam.result:
Auto merged
mysql-test/r/ps_3innodb.result:
Auto merged
mysql-test/r/ps_4heap.result:
Auto merged
mysql-test/r/ps_5merge.result:
Auto merged
mysql-test/r/ps_6bdb.result:
Auto merged
mysql-test/r/ps_7ndb.result:
Auto merged
sql/field.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/my_decimal.h:
Auto merged
sql/sql_base.cc:
Auto merged
constant outer tables did not return null complemented
rows when conditions were evaluated to FALSE.
Wrong results were returned because the conditions over constant
outer tables, when being pushed down, were erroneously enclosed
into the guard function used for WHERE conditions.
mysql-test/r/join_outer.result:
Added a test case for bug #28571.
mysql-test/t/join_outer.test:
Added a test case for bug #28571.
sql/sql_select.cc:
Fixed bug #28571. Outer join queries with ON conditions over
constant outer tables did not return null complemented
rows when conditions were evaluated to FALSE.
Wrong results were returned because the conditions over constant
outer tables, when being pushed down, were erroneously enclosed
into the guard function used for WHERE conditions.
The problem is fixed in the function make_join_select. Now the
conditions over constant tables from ON expressions are pushed
down after the conditions from WHERE has been pushed down.
sometimes `mysqldump --hex-blob' overruned output buffer by '\0' byte.
The dump_table() function has been fixed to reserve 1 byte more for the
last '\0' byte of dumped string.
client/mysqldump.c:
Fixed bug #28522.
The dump_table() function has been fixed to reserve 1 byte more for the
last '\0' byte of dumped string.
mysql-test/t/mysqldump.test:
Updated test case for bug #28522.
mysql-test/r/mysqldump.result:
Updated test case for bug #28522.
CHECK OPTION and a subquery in WHERE condition.
The abort was triggered by setting the value of join->tables for
subqueries in the function JOIN::cleanup. This function was called
after an invocation of the JOIN::join_free method for subqueries
used in WHERE condition.
mysql-test/r/view.result:
Added a test case for bug #28561.
mysql-test/t/view.test:
Added a test case for bug #28561.
sql/sql_select.cc:
Fixed bug #28561: assertion abort for update on multi-table view with
CHECK OPTION and a subquery in WHERE condition.
The abort was triggered by setting the value of join->tables for
subqueries in the function JOIN::cleanup. This function was called
after an invocation of the JOIN::join_free method for subqueries
used in WHERE condition.
Setting the value of join->tables to for a subquery created serious
problems for checking WHERE condition after update of the multi-table
view as this check is performed in the do_select function right
after a call of the JOIN::join_free method.
In fact setting join->tables to 0 in JOIN::cleanup is not needed
anywhere in the current code.
If a stored function or a trigger was killed it had aborted but no error
was thrown. This allows the caller statement to continue without a notice.
This may lead to a wrong data being inserted/updated to/deleted as in such
cases the correct result of a stored function isn't guaranteed. In the case
of triggers it allows the caller statement to ignore kill signal and to
waste time because of re-evaluation of triggers that always will fail
because thd->killed flag is still on.
Now the Item_func_sp::execute() and the sp_head::execute_trigger() functions
check whether a function or a trigger were killed during execution and
throws an appropriate error if so.
Now the fill_record() function stops filling record if an error was reported
through thd->net.report_error.
sql/item_func.cc:
Bug#27563: Stored functions and triggers wasn't throwing an error when killed.
Now the Item_func_sp::execute() function checks whether a trigger was killed
during execution and throws an appropriate error if so.
sql/sp_head.cc:
Bug#27563: Stored functions and triggers wasn't throwing an error when killed.
Now the sp_head::execute_trigger() function checks whether a function was
killed during execution and throws an appropriate error if so.
sql/sql_base.cc:
Bug#27563: Stored functions and triggers wasn't throwing an error when killed.
Now the fill_record() function stops filling record if an error was reported
through thd->net.report_error.
mysql-test/r/kill.result:
Added a test case for the bug#27563: Stored functions and triggers wasn't
throwing an error when killed.
mysql-test/t/kill.test:
Added a test case for the bug#27563: Stored functions and triggers wasn't
throwing an error when killed.
When processing the USE/FORCE index hints
the optimizer was not checking if the indexes
specified are enabled (see ALTER TABLE).
Fixed by:
Backporting the fix for bug 20604 to 5.0
mysql-test/r/key.result:
Test for BUG 20604.
The important part of the test is the explain output that
tests what indexes are used.
mysql-test/r/myisam.result:
Bug #28476: test cases
mysql-test/t/key.test:
Bug 20604:
The minimal test case that reveals the bug. The optimizer for
aggregates relies on keys disabled with ALTER TABLE ... DISABLE KEYS
not being in the set TABLE::keys_in_use_for_query.
When the execution engine tries to use a disabled index, MyISAM
returns an error.
mysql-test/t/myisam.test:
Bug #28476: test cases
sql/sql_base.cc:
Bug #28476:
- Ignore disabled indexes in USE/FORCE index
sql/sql_select.cc:
Bug 20604 : The intersection operation between table->s->keys_in_use
and table->keys_in_use_for_query is no longer necessary.
We can trust that the latter is a subset of the former.
sql/table.h:
Bug 20604:
Added comments to TABLE_SHARE::keys_in_use and
TABLE::keys_in_use_for_query.
mode.
When a new DATE/DATETIME field without default value is being added by the
ALTER TABLE the '0000-00-00' value is used as the default one. But it wasn't
checked whether such value was allowed by the set sql mode. Due to this
'0000-00-00' values was allowed for DATE/DATETIME fields even in the
NO_ZERO_DATE mode.
Now the mysql_alter_table() function checks whether the '0000-00-00' value
is allowed for DATE/DATETIME fields by the set sql mode.
The new error_if_not_empty flag is used in the mysql_alter_table() function
to indicate that it should abort if the table being altered isn't empty.
The new new_datetime_field field is used in the mysql_alter_table() function
for error throwing purposes.
The new error_if_not_empty parameter is added to the copy_data_between_tables()
function to indicate the it should return error if the source table isn't empty.
mysql-test/t/alter_table.test:
Added a test case for the bug#27507: Wrong DATETIME value was allowed by
ALTER TABLE in the NO_ZERO_DATE mode.
mysql-test/r/alter_table.result:
Added a test case for the bug#27507: Wrong DATETIME value was allowed by
ALTER TABLE in the NO_ZERO_DATE mode.
sql/sql_table.cc:
Bug#27507: Wrong DATETIME value was allowed by ALTER TABLE in the NO_ZERO_DATE
mode.
Now the mysql_alter_table() function checks whether the '0000-00-00' value
is allowed for DATE/DATETIME fields by the set sql mode.
The new error_if_not_empty flag is used in the mysql_alter_table() function
to indicate that it should abort if the table being altered isn't empty.
The new new_datetime_field field is used in the mysql_alter_table() function
for error throwing purposes.
The new error_if_not_empty parameter is added to the copy_data_between_tables()
function to indicate the it should return error if the source table isn't empty.
into quadxeon.mysql.com:/benchmarks/ext3/TOSAVE/tsmith/bk/maint/50
configure.in:
Auto merged
mysql-test/r/strict.result:
Auto merged
mysql-test/r/type_datetime.result:
Auto merged
mysql-test/t/type_datetime.test:
Auto merged
sql/item.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
decimal_round failed to perform a correct rounding
of a decimal number if its first nine digits were '9'.
It just sets those digits to 0.
mysql-test/r/type_newdecimal.result:
Bug #27984 Long Decimal Maths produces truncated results.
test result
mysql-test/t/type_newdecimal.test:
Bug #27984 Long Decimal Maths produces truncated results.
test case
strings/decimal.c:
Bug #27984 Long Decimal Maths produces truncated results.
when to == from we break the data if we do to->buf[0]=0
So now doing this after the data is moved and only
if we really need to set to->buf[0] to zero
my_decimal in some cases can contain more decimal digits than
is officially supported (DECIMAL_MAX_PRECISION), so we need to
prepare bigger buffer for the resulting string.
mysql-test/r/type_newdecimal.result:
bug #28361 Buffer overflow in DECIMAL code on Windows
test result
mysql-test/t/type_newdecimal.test:
bug #28361 Buffer overflow in DECIMAL code on Windows
test case
This test case doesn't fall in most cases even without the fix
Still valgrind shows the problemn
sql/my_decimal.h:
bug #28361 Buffer overflow in DECIMAL code on Windows
DECIMAL_MAX_POSSIBLE_PRECISION introduced to be used in places,
when we need to check for the number of digits technicaly possible
in my_decimal.
DECIMAL_MAX_STR_LENGTH fixed as it has to fit for the MAX_POSSIBLE_PRECISION
- The SQL commands used by mysql_upgrade are written to be run
with sql_mode set to '' - thus the scripts should change sql_mode
for the session to make sure the SQL is legal.
mysql-test/r/mysql_upgrade.result:
Update test result
mysql-test/t/mysql_upgrade.test:
The SQL commands used by mysql_upgrade are written to be run
with sql_mode set to '' - thus the scripts should change sql_mode
for the session to make sure the SQL is legal.
scripts/mysql_system_tables_fix.sql:
Set sql_mode to '' before running the SQL commands
to fix system tables - backport from 5.1
into pilot.blaudden:/home/msvensson/mysql/mysql-5.0-maint
client/mysqltest.c:
Auto merged
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/r/mysqltest.result:
Auto merged
mysql-test/t/mysqltest.test:
SCCS merged
- Final touchups
client/mysqltest.c:
Final touch ups, rename sorted_results to sorted_result
mysql-test/r/mysqltest.result:
Update test result
mysql-test/t/mysqltest.test:
Update results with additional subtests for empty result set,
NULL values and 1024 rows
into siva.hindu.god:/home/tsmith/m/bk/maint/50
mysql-test/r/type_datetime.result:
Auto merged
mysql-test/t/outfile.test:
Auto merged
mysql-test/t/type_datetime.test:
Auto merged
sql/field.cc:
Auto merged
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_func.h:
Auto merged
sql/my_decimal.h:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sp.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.h:
Auto merged
is involved.
The Arg_comparator::compare_datetime() comparator caches its arguments if
they are constants i.e. const_item() returns true. The
Item_func_get_user_var::const_item() returns true or false based on
the current query_id and the query_id where the variable was created.
Thus even if a query can change its value its const_item() still will return
true. All this leads to a wrong comparison result when an object of the
Item_func_get_user_var class is involved.
Now the Arg_comparator::can_compare_as_dates() and the
get_datetime_value() functions never cache result of the GET_USER_VAR()
function (the Item_func_get_user_var class).
mysql-test/t/type_datetime.test:
A test case is added for the bug#28261: Wrong DATETIME comparison result when the GET_USER_VAR function
is involved.
mysql-test/r/type_datetime.result:
A test case is added for the bug#28261: Wrong DATETIME comparison result when the GET_USER_VAR function
is involved.
sql/item_cmpfunc.cc:
Bug#28261: Wrong DATETIME comparison result when the GET_USER_VAR function
is involved.
Now the Arg_comparator::can_compare_as_dates() and the
get_datetime_value() functions never cache result of the GET_USER_VAR()
function (the Item_func_get_user_var class).
Conversion errors when constructing the condition for an
IN predicates were treated as if the affected column contains
NULL. If such a IN predicate is inside NOT we get wrong
results.
Corrected the handling of conversion errors in an IN predicate
that is resolved by unique_subquery (through
subselect_uniquesubquery_engine).
mysql-test/r/subselect3.result:
Bug#22855: test case
mysql-test/t/subselect3.test:
Bug#22855: test case
sql/item_subselect.cc:
Bug#22855: corrected the handling of conversion errors and
NULL key values in IN predicate that is resolved by index
lookup.
subqueries in WHERE conditions.
This bug was introduced by the patch for bug 27321.
mysql-test/r/subselect.result:
Added a test case for bug #28337.
mysql-test/t/subselect.test:
Added a test case for bug #28337.
sql/item.cc:
Fixed bug #28337: wrong results for grouping queries with correlated
subqueries in WHERE conditions.
This bug was introduced by the patch for bug 27321.
Now in the Item_field::fix_outer_field function we create an Item_outer_ref
object for an outer reference only if it is used in the SELECT list or
in the HAVING clause of the subquery against which the reference is resolved.
- Change from "query_sorted <query>" to "sorted_results"
client/mysqltest.c:
Replace "query_sorted <query>" with the ability to turn
on "one shot result sorting" with the command "sorted_results"
mysql-test/r/mysqltest.result:
Update test and result
mysql-test/t/mysqltest.test:
Update test and result
- Problem was reported as a SP variable using itself as
right value inside SUBSTR caused corruption of data.
- This bug could not be verified in either 5.0bk or 5.1bk
- Added test case to prevent future regressions.
mysql-test/r/sp-vars.result:
Added test case for a reported regression which couldn't be
verified.
mysql-test/t/sp-vars.test:
Added test case for a reported regression which couldn't be
verified.
into linux-st28.site:/home/martin/mysql/src/5.0o-bug27573
mysql-test/r/func_group.result:
Auto merged
mysql-test/t/func_group.test:
bug#27573: hand merged test case
Made year 2000 handling more uniform
Removed year 2000 handling out from calc_days()
The above removes some bugs in date/datetimes with year between 0 and 200
Now we get a note when we insert a datetime value into a date column
For default values to CREATE, don't give errors for warning level NOTE
Fixed some compiler failures
Added library ws2_32 for windows compilation (needed if we want to compile with IOCP support)
Removed duplicate typedef TIME and replaced it with MYSQL_TIME
Better (more complete) fix for: Bug#21103 "DATE column not compared as DATE"
Fixed properly Bug#18997 "DATE_ADD and DATE_SUB perform year2K autoconversion magic on 4-digit year value"
Fixed Bug#23093 "Implicit conversion of 9912101 to date does not match cast(9912101 as date)"
include/my_time.h:
Removed not used define YY_MAGIC_BELOW
Added prototype for year_2000_handling()
mysql-test/r/date_formats.result:
Updated results (fixed bug in date_format() with year < 99
mysql-test/r/func_sapdb.result:
Added more testing of make_date()
mysql-test/r/ps_2myisam.result:
Now we get a note when we insert a datetime value into a date column
mysql-test/r/ps_3innodb.result:
Now we get a note when we insert a datetime value into a date column
mysql-test/r/ps_4heap.result:
Now we get a note when we insert a datetime value into a date column
mysql-test/r/ps_5merge.result:
Now we get a note when we insert a datetime value into a date column
mysql-test/r/ps_7ndb.result:
Now we get a note when we insert a datetime value into a date column
mysql-test/r/strict.result:
zero-year in str_to_date() throws warning in strict
mysql-test/r/type_date.result:
Added test for date conversions
mysql-test/r/type_datetime.result:
Added testcase for datetime to date conversion.
mysql-test/t/date_formats.test:
Added testing of dates < 200
mysql-test/t/func_sapdb.test:
More testing of makedate()
mysql-test/t/type_date.test:
Added test for date conversions
mysql-test/t/type_datetime.test:
Added testcase for datetime to date conversion
sql/field.cc:
Give note if we insert a datetime value in a date field
Don't give notes if we are doing internal test conversions (like from convert_constant_item())
More documentation (store functions can now return '3' to inform that the function did return a NOTE (not warning or error))
Revert some changes in Field_newdate::store() to get more optimal code
Field::set_warning() will now ignore notes if CHECK_FIELD_IGNORE is set.
New parameters to make_truncated_value_warning()
sql/field.h:
Give note if we insert a datetime value in a date field
Don't give notes if we are doing internal test conversions (like from convert_constant_item())
More documentation (store functions can now return '3' to inform that the function did return a NOTE (not warning or error))
Revert some changes in Field_newdate::store() to get more optimal code
Field::set_warning() will now ignore notes if CHECK_FIELD_IGNORE is set.
New parameters to make_truncated_value_warning()
sql/item.cc:
Give note if we insert a datetime value in a date field
Don't give notes if we are doing internal test conversions (like from convert_constant_item())
More documentation (store functions can now return '3' to inform that the function did return a NOTE (not warning or error))
Revert some changes in Field_newdate::store() to get more optimal code
Field::set_warning() will now ignore notes if CHECK_FIELD_IGNORE is set.
New parameters to make_truncated_value_warning()
sql/item.h:
TIME -> MYSQL_TIME
sql/item_cmpfunc.cc:
Don't print notes in convert_constant_item()
sql/item_func.h:
TIME -> MYSQL_TIME
sql/item_timefunc.cc:
New parameters to make_truncated_value_warning()
Moved year 2000 handling out from calc_days()
sql/item_timefunc.h:
TIME -> MYSQL_TIME
sql/my_decimal.cc:
TIME -> MYSQL_TIME
sql/my_decimal.h:
TIME -> MYSQL_TIME
sql/mysql_priv.h:
Added error level to make_truncated_value_warning()
sql/protocol.cc:
TIME -> MYSQL_TIME
sql/protocol.h:
TIME -> MYSQL_TIME
sql/sp.cc:
TIME -> MYSQL_TIME
sql/sql_base.cc:
Make testing of result value of save_in_field() uniform
sql/sql_class.h:
TIME -> MYSQL_TIME
sql/sql_show.cc:
TIME -> MYSQL_TIME
sql/structs.h:
TIME -> MYSQL_TIME
sql/time.cc:
Added error level to make_truncated_value_warning()
sql/tztime.cc:
TIME -> MYSQL_TIME
sql/tztime.h:
TIME -> MYSQL_TIME
sql/unireg.cc:
For default values to CREATE, don't give errors for warning level NOTE
(Fixed failed CREATE when we give a datetime value to a date field)
sql-common/my_time.c:
Added year_2000_handling()
Removed year 2000 handling from calc_daynr()
into vajra.(none):/opt/local/work/mysql-5.0-21483
sql/sp_head.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_lex.h:
Auto merged
Bug#21483 "Server abort or deadlock on INSERT DELAYED with another
implicit insert"
Also fixes and adds test cases for bugs:
20497 "Trigger with INSERT DELAYED causes Error 1165"
21714 "Wrong NEW.value and server abort on INSERT DELAYED to a
table with a trigger".
Post-review fixes.
Problem:
In MySQL INSERT DELAYED is a way to pipe all inserts into a
given table through a dedicated thread. This is necessary for
simplistic storage engines like MyISAM, which do not have internal
concurrency control or threading and thus can not
achieve efficient INSERT throughput without support from SQL layer.
DELAYED INSERT works as follows:
For every distinct table, which can accept DELAYED inserts and has
pending data to insert, a dedicated thread is created to write data
to disk. All user connection threads that attempt to
delayed-insert into this table interact with the dedicated thread in
producer/consumer fashion: all records to-be inserted are pushed
into a queue of the dedicated thread, which fetches the records and
writes them.
In this design, client connection threads never open or lock
the delayed insert table.
This functionality was introduced in version 3.23 and does not take
into account existence of triggers, views, or pre-locking.
E.g. if INSERT DELAYED is called from a stored function, which,
in turn, is called from another stored function that uses the delayed
table, a deadlock can occur, because delayed locking by-passes
pre-locking. Besides:
* the delayed thread works directly with the subject table through
the storage engine API and does not invoke triggers
* even if it was patched to invoke triggers, if triggers,
in turn, used other tables, the delayed thread would
have to open and lock involved tables (use pre-locking).
* even if it was patched to use pre-locking, without deadlock
detection the delayed thread could easily lock out user
connection threads in case when the same table is used both
in a trigger and on the right side of the insert query:
the delayed thread would not release locks until all inserts
are complete, and user connection can not complete inserts
without having locks on the tables used on the right side of the
query.
Solution:
These considerations suggest two general alternatives for the
future of INSERT DELAYED:
* it is considered a full-fledged alternative to normal INSERT
* it is regarded as an optimisation that is only relevant
for simplistic engines.
Since we missed our chance to provide complete support of new
features when 5.0 was in development, the first alternative
currently renders infeasible.
However, even the second alternative, which is to detect
new features and convert DELAYED insert into a normal insert,
is not easy to implement.
The catch-22 is that we don't know if the subject table has triggers
or is a view before we open it, and we only open it in the
delayed thread. We don't know if the query involves pre-locking
until we have opened all tables, and we always first create
the delayed thread, and only then open the remaining tables.
This patch detects the problematic scenarios and converts
DELAYED INSERT to a normal INSERT using the following approach:
* if the statement is executed under pre-locking (e.g. from
within a stored function or trigger) or the right
side may require pre-locking, we detect the situation
before creating a delayed insert thread and convert the statement
to a conventional INSERT.
* if the subject table is a view or has triggers, we shutdown
the delayed thread and convert the statement to a conventional
INSERT.
mysql-test/r/insert.result:
Update test results.
mysql-test/t/insert.test:
Add a test case for Bug#21483, Bug#20497, Bug#21714 (INSERT DELAYED
and stored routines, triggers).
sql/sp_head.cc:
Upgrade lock type to TL_WRITE when computing the pre-locking set.
sql/sql_base.cc:
Use a new method.
sql/sql_insert.cc:
INSERT DELAYED and pre-locking:
- if under pre-locking, upgrade the lock type to TL_WRITE
and proceed as a normal write
- if DELAYED table has triggers, also request a lock upgrade.
- make sure errors in the delayed thread are propagated
correctly
sql/sql_lex.h:
Add a method to check if a parsed tree refers to stored
routines.
in the case of the overflow in the decimal->integer conversion
we didn't return the proper boundary value, but just the result
of the conversion we calculated on the moment of the error
mysql-test/r/bigint.result:
bug #8663 cant use bigint unsigned as input to cast
test result fixed
mysql-test/t/bigint.test:
bug #8663 cant use bigint unsigned as input to cast
test case
strings/decimal.c:
bug #8663 cant use bigint unsigned as input to cast
decimal->int conversion fixed to return proper boundary value
in the case of overflow
function.
A wrong condition was used to check that the
Arg_comparator::can_compare_as_dates() function calculated the value of the
string constant. When comparing a non-const STRING function with a constant
DATETIME function it leads to saving an arbitrary value as a cached value of
the DATETIME function.
Now the Arg_comparator::set_cmp_func() function initializes the const_value
variable to the impossible DATETIME value (-1) and this const_value is
cached only if it was changed by the Arg_comparator::can_compare_as_dates()
function.
mysql-test/t/type_datetime.test:
Added a test case for the bug#28208: Wrong result of a non-const STRING function with a const DATETIME function.
mysql-test/r/type_datetime.result:
Added a test case for the bug#28208: Wrong result of a non-const STRING function with a const DATETIME function.
sql/item_cmpfunc.cc:
Bug#28208: Wrong result of a non-const STRING function with a const DATETIME
function.
Now the Arg_comparator::set_cmp_func() function initializes the const_value
variable to the impossible DATETIME value (-1) and this const_value is
cached only if it was changed by the Arg_comparator::can_compare_as_dates()
function.
into olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug28272
mysql-test/r/innodb_mysql.result:
Auto merged
mysql-test/t/innodb_mysql.test:
Auto merged
sql/sql_select.cc:
Manual merge
to NULL
For queries of the form SELECT MIN(key_part_k) FROM t1
WHERE key_part_1 = const and ... and key_part_k-1 = const,
the opt_sum_query optimization tries to
use an index to substitute MIN/MAX functions with their values according
to the following rules:
1) Insert the minimum non-null values where the WHERE clause still matches, or
3) A row of nulls
However, the correct semantics requires that there is a third case 2)
such that a NULL value is substituted if there are only NULL values for
key_part_k.
The patch modifies opt_sum_query() to handle this missing case.
mysql-test/r/func_group.result:
Bug #27573: Correct result
mysql-test/t/func_group.test:
Bug #27573: test case
sql/opt_sum.cc:
Bug #27573:
Added code that will try to read the
first non-null value for a given complete-field prefix, second
choice is to read the null, and lastly set the error code if no row
is found.
