The problem was that we restored SQL_CACHE, SQL_NO_CACHE flags in SELECT
statement from internal structures based on value set later at runtime, not
the original value set by the user.
The solution is to remember that original value.
mysql-test/r/auto_increment.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/func_compress.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/func_math.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/func_system.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/func_time.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/information_schema.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/query_cache.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/rpl_get_lock.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/rpl_master_pos_wait.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/show_check.result:
Add result for bug#17203.
mysql-test/r/subselect.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/type_blob.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/variables.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/r/view.result:
Update result to not report SQL_NO_CACHE if it wasn't there at first place.
mysql-test/t/show_check.test:
Add test case for bug#17203.
sql/sql_lex.cc:
Reset SELECT_LEX::sql_cache together with SELECT_LEX::options.
sql/sql_lex.h:
Add SELECT_LEX::sql_cache field to store original user setting.
sql/sql_select.cc:
Output SQL_CACHE and SQL_NO_CACHE depending on stored original user setting.
sql/sql_yacc.yy:
Make effect of SQL_CACHE and SQL_NO_CACHE mutually exclusive. Ignore
SQL_CACHE if SQL_NO_CACHE was used. Remember what was set by the user.
Reset SELECT_LEX::sql_cache together with SELECT_LEX::options.
Additional fix for #16377 for bigendian platforms
sql_select.cc, select.result, select.test:
After merge fix
mysql-test/t/select.test:
After merge fix
mysql-test/r/select.result:
After merge fix
sql/sql_select.cc:
After merge fix
sql/field.h:
Additional fix for #16377 for bigendian platforms
sql/field.cc:
Additional fix for #16377 for bigendian platforms
tables
Currently in INSERT ... SELECT ... LIMIT ... the compiler uses a
temporary table to store the results of SELECT ... LIMIT .. and then
uses that table as a source for INSERT. The problem is that in some cases
it actually skips the LIMIT clause in doing that and materializes the
whole SELECT result set regardless of the LIMIT.
This fix is limiting the process of filling up the temp table with only
that much rows that will be actually used by propagating the LIMIT value.
mysql-test/r/insert_select.result:
* Bug #9676: INSERT INTO x SELECT .. FROM x LIMIT 1; slows down with big
tables
- a test demonstrating the code path
mysql-test/t/insert_select.test:
* Bug #9676: INSERT INTO x SELECT .. FROM x LIMIT 1; slows down with big
tables
- a test demonstrating the code path
sql/sql_select.cc:
* Bug #9676: INSERT INTO x SELECT .. FROM x LIMIT 1; slows down with big
tables
- pass through the real LIMIT number if the temp table is created for
buffering results.
- set the counter for all the cases when the temp table is not used for
grouping
into rurik.mysql.com:/home/igor/mysql-5.0-opt
sql/opt_sum.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_select.h:
Auto merged
mysql-test/r/func_group.result:
SCCS merged
mysql-test/t/func_group.test:
SCCS merged
The bug report revealed two problems related to min/max optimization:
1. If the length of a constant key used in a SARGable condition for
for the MIN/MAX fields is greater than the length of the field an
unwanted warning on key truncation is issued;
2. If MIN/MAX optimization is applied to a partial index, like INDEX(b(4))
than can lead to returning a wrong result set.
mysql-test/r/func_group.result:
Added test cases for bug #18206.
mysql-test/t/func_group.test:
Added test cases for bug #18206.
sql/opt_sum.cc:
Fixed bug #18206.
Suppressed the warning about data truncation when store_val_in_field
was used to store keys for the field used in MIN/MAX optimization.
Blocked MIN/MAX optimization for partial keys, such as in INDEX(b(4)).
sql/sql_select.cc:
Fixed bug #18206.
Added a parameter for the function store_val_in_field allowing to
control setting warnings about data truncation in the function.
sql/sql_select.h:
Fixed bug #18206.
Added a parameter for the function store_val_in_field allowing to
control setting warnings about data truncation in the function.
into mysql.com:/home/kgeorge/mysql/5.0/B18681
sql/mysql_priv.h:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_select.cc:
Auto merged
The check for view security was lacking several points :
1. Check with the right set of permissions : for each table ref that
participates in a view there were the right credentials to use in it's
security_ctx member, but these weren't used for checking the credentials.
This makes hard enforcing the SQL SECURITY DEFINER|INVOKER property
consistently.
2. Because of the above the security checking for views was just ruled out
in explicit ways in several places.
3. The security was checked only for the columns of the tables that are
brought into the query from a view. So if there is no column reference
outside of the view definition it was not detecting the lack of access to
the tables in the view in SQL SECURITY INVOKER mode.
The fix below tries to fix the above 3 points.
mysql-test/r/grant.result:
removed nondeterminism (unspecified order) in some test output
mysql-test/r/view_grant.result:
Somewhat extended test case for the bug and similar queries.
mysql-test/t/grant.test:
removed nondeterminism (unspecified order) in some test output
mysql-test/t/view_grant.test:
Somewhat extended test case for the bug and similar queries.
sql/mysql_priv.h:
A wrapper for setup_tables that also checks access to the tables
sql/sql_acl.cc:
removed artificial security check stop and used the table ref's credentials.
sql/sql_base.cc:
a wrapper for setup_tables to check access to the tables
sql/sql_delete.cc:
wrapper called.
sql/sql_insert.cc:
wrapper called
sql/sql_load.cc:
wrapper called
sql/sql_parse.cc:
wrapper called and artificial check stop removed
sql/sql_select.cc:
wrapper called
sql/sql_update.cc:
wrapper called
sql/table.cc:
Mask table access to the view error as well.
Fixed compiler warnings
Fixed valgrind warning in Item_date_add_intervall::eq. (Recoding of bugfix #19490)
sql/field.cc:
remove dflt_field from field structure (not needed)
Simple cleanup of code that been copied elsewhere
sql/field.h:
remove dflt_field from field structure (not needed)
sql/item.h:
Removed compiler warnings
sql/item_timefunc.cc:
Fixed Item_date_add_intervall::eq
The problem was that when we call 'eq' 'this' is not fixed, which means we can't call const_item() or a value function.
I fixed this so that we check eq for all arguments and that the sign and type are identical.
(The original code gave a 'accessing uninitialized data' in valgrind.
sql/mysql_priv.h:
Added default fields to create_tmp_field
sql/sql_insert.cc:
New default_field parameter to create_tmp_field()
sql/sql_select.cc:
New default_field parameter to create_tmp_field()
Use this in create_tmp_table() to set right default value for a field
transfer NO_DEFAULT_VALUE_FLAG flag to new field
mysql-test/r/strict.result:
Fix for bug#17626 CREATE TABLE ... SELECT failure with TRADITIONAL SQL mode
test case
mysql-test/r/type_ranges.result:
Fix for bug#17626 CREATE TABLE ... SELECT failure with TRADITIONAL SQL mode
result fix
mysql-test/t/strict.test:
Fix for bug#17626 CREATE TABLE ... SELECT failure with TRADITIONAL SQL mode
test case
When a CREATE TABLE command created a table from a materialized
view id does not inherit default values from the underlying table.
Moreover the temporary table used for the view materialization
does not inherit those default values.
In the case when the underlying table contained ENUM fields it caused
misleading error messages. In other cases the created table contained
wrong default values.
The code was modified to ensure inheritance of default values for
materialized views.
mysql-test/r/view.result:
Added a test case for bug #19089.
mysql-test/t/view.test:
Added a test case for bug #19089.
sql/field.cc:
Fixed bug ##19089.
Added field dflt_field to the class Field.
This field is set for temp table fields that inherits
default values of items from which they are created.
sql/field.h:
Fixed bug ##19089.
Added field dflt_field to the class Field.
This field is set for temp table fields that inherits
default values of items from which they are created.
sql/sql_select.cc:
Fixed bug #19089.
When a CREATE TABLE command created a table from a materialized
view id does not inherit default values from the underlying table.
Moreover the temporary table used for the view materialization
does not inherit those default values.
The code was modified to ensure inheritance of default values for
materialized views.
Re-work best_access_path() and find_best() to reuse E(#rows(range access)) as
E(#rows(ref[_or_null](const) access) only when it is appropriate.
[This is the final cumulative patch]
mysql-test/r/select.result:
BUG#17379: Testcase
mysql-test/r/subselect.result:
BUG#17379: Updated test results
mysql-test/t/select.test:
BUG#17379: Testcase
sql/opt_range.cc:
BUG#17379: Wrong reuse of E(#rows(range)) as E(#rows(ref(const))):
Make range optimizer together with TABLE::quick_* also return TABLE::quick_n_ranges
sql/sql_select.cc:
BUG#17379: Wrong reuse of E(#rows(range)) as E(#rows(ref(const))):
Re-work best_access_path() to reuse E(#rows(range access)) as
E(#rows(ref[_or_null](const) access) only when it is appropriate.
sql/table.h:
BUG#17379: Wrong reuse of E(#rows(range)) as E(#rows(ref(const))):
Make range optimizer together with TABLE::quick_* also return TABLE::quick_n_ranges
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
A query with a group by and having clauses could return a wrong
result set if the having condition contained a constant conjunct
evaluated to FALSE.
It happened because the pushdown condition for table with
grouping columns lost its constant conjuncts.
Pushdown conditions are always built by the function make_cond_for_table
that ignores constant conjuncts. This is apparently not correct when
constant false conjuncts are present.
mysql-test/r/having.result:
Added a test case for bug #14927.
mysql-test/t/having.test:
Added a test case for bug #14927.
sql/sql_lex.cc:
Fixed bug #14927.
Initialized fields for having conditions in st_select_lex::init_query().
sql/sql_lex.h:
Fixed bug #14927.
Added a field to restore having condititions for execution in SP and PS.
sql/sql_prepare.cc:
Fixed bug #14927.
Added code to restore havinf conditions for execution in SP and PS.
sql/sql_select.cc:
Fixed bug #14927.
Performed evaluation of constant expressions in having clauses.
If the having condition contains a constant conjunct that is always false
an empty result set is returned after the optimization phase.
In this case the corresponding EXPLAIN command now returns
"Impossible HAVING" in the last column.
The bug was as follows: When merge_key_fields() encounters "t.key=X OR t.key=Y" it will
try to join them into ref_or_null access via "t.key=X OR NULL". In order to make this
inference it checks if Y<=>NULL, ignoring the fact that value of Y may be not yet known.
The fix is that the check if Y<=>NULL is made only if value of Y is known (i.e. it is a
constant).
TODO: When merging to 5.0, replace used_tables() with const_item() everywhere in merge_key_fields().
mysql-test/r/innodb_mysql.result:
Testcase for BUG16798
mysql-test/t/innodb_mysql.test:
Testcase for BUG16798
sql/sql_select.cc:
BUG#16798: Inapplicable ref_or_null query plan and bad query result on random occasions
In merge_key_fields() don't call val->is_null() if the value of val is not known.
into rurik.mysql.com:/home/igor/dev/mysql-5.0-0
mysql-test/r/subselect.result:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sql_select.cc:
Auto merged
This performance degradation was due to the fact that some
cost evaluation code added into 4.1 in the function find_best was
not merged into the code of the function best_access_path added
together with other code for greedy optimizer.
Added a parameter to the function print_plan. The parameter contains
accumulated cost for a given partial join.
The patch does not include a special test case since this performance
degradation is hard to reproduse with a simple example.
TODO: make the function find_best use the function best_access_path
in order to remove duplication of code which might result in incomplete
merges in the future.
mysql-test/r/delete.result:
Fixed bug #14292: performance degradation for a benchmark query.
Adjusted test results.
mysql-test/r/subselect.result:
Fixed bug #14292: performance degradation for a benchmark query.
Adjusted test results.
sql/mysql_priv.h:
Fixed bug #14292: performance degradation for a benchmark query.
Added a parameter to the function print_plan. The parameter contains
accumulated cost for a given partial join.
sql/sql_select.cc:
Fixed bug #14292: performance degradation for a benchmark query.
This performance degradation was due to the fact that some
cost evaluation code added into 4.1 in the function find_best was
not merged into the code of the function best_access_path added
together with other code for greedy optimizer.
sql/sql_test.cc:
Fixed bug #14292: performance degradation for a benchmark query.
Added a parameter to the function print_plan. The parameter contains
accumulated cost for a given partial join.
The bug caused wrong result sets for union constructs of the form
(SELECT ... ORDER BY order_list1 [LIMIT n]) ORDER BY order_list2.
For such queries order lists were concatenated and limit clause was
completely neglected.
mysql-test/r/order_by.result:
Added a test case for bug #18767.
mysql-test/t/order_by.test:
Added a test case for bug #18767.
sql/sql_lex.h:
Fixed bug #18767.
Placed the code the created a fake SELECT_LEX into a separate function.
sql/sql_parse.cc:
Fixed bug #18767.
Placed the code the created a fake SELECT_LEX into a separate function.
sql/sql_select.cc:
Fixed bug #18767.
Changed the condition on which a SELECT is treated as part of a UNION.
The SELECT in
(SELECT ... ORDER BY order_list1 [LIMIT n]) ORDER BY order_list2
now is handled in the same way as the first SELECT in a UNION
sequence.
sql/sql_union.cc:
Fixed bug #18767.
Changed the condition at which a SELECT is treated as part of a UNION.
The SELECT in
(SELECT ... ORDER BY order_list1 [LIMIT n]) ORDER BY order_list2
now is handled in the same way as the first SELECT in a UNION
sequence.
sql/sql_yacc.yy:
Fixed bug #18767.
Changed the condition at which a SELECT is treated as part of a UNION.
The SELECT in
(SELECT ... ORDER BY order_list1 [LIMIT n]) ORDER BY order_list2
now is handled in the same way as the first SELECT in a UNION
sequence. In the same way is handled the SELECT in
(SELECT ... LIMIT n) ORDER BY order list.
Yet if there is neither ORDER BY nor LIMIT in the single-select
union construct
(SELECT ...) ORDER BY order_list
then it is still handled as simple select with an order clause.
The SQL standard doesn't allow to use in HAVING clause fields that are not
present in GROUP BY clause and not under any aggregate function in the HAVING
clause. However, mysql allows using such fields. This extension assume that
the non-grouping fields will have the same group-wise values. Otherwise, the
result will be unpredictable. This extension allowed in strict
MODE_ONLY_FULL_GROUP_BY sql mode results in misunderstanding of HAVING
capabilities.
The new error message ER_NON_GROUPING_FIELD_USED message is added. It says
"non-grouping field '%-.64s' is used in %-.64s clause". This message is
supposed to be used for reporting errors when some field is not found in the
GROUP BY clause but have to be present there. Use cases for this message are
this bug and when a field is present in a SELECT item list not under any
aggregate function and there is GROUP BY clause present which doesn't mention
that field. It renders the ER_WRONG_FIELD_WITH_GROUP error message obsolete as
being more descriptive.
The resolve_ref_in_select_and_group() function now reports the
ER_NON_GROUPING_FIELD_FOUND error if the strict mode is set and the field for
HAVING clause is found in the SELECT item list only.
sql/share/errmsg.txt:
Added the new ER_NON_GROUPING_FIELD_USED error message for the bug#14169.
mysql-test/t/having.test:
Added test case for the bug#18739: non-standard HAVING extension was allowed in strict ANSI sql mode.
mysql-test/r/having.result:
Added test case for the bug#18739: non-standard HAVING extension was allowed in strict ANSI sql mode.
sql/sql_select.cc:
Added TODO comment to change the ER_WRONG_FIELD_WITH_GROUP to more detailed ER_NON_GROUPING_FIELD_USED message.
sql/item.cc:
Fixed bug#18739: non-standard HAVING extension was allowed in strict ANSI sql mode.
The resolve_ref_in_select_and_group() function now reports the
ER_NON_GROUPING_FIELD_FOUND error if the strict MODE_ONLY_FULL_GROUP_BY mode
is set and the field for HAVING clause is found in the SELECT item list only.
used
In a simple queries a result of the GROUP_CONCAT() function was always of
varchar type.
But if length of GROUP_CONCAT() result is greater than 512 chars and temporary
table is used during select then the result is converted to blob, due to
policy to not to store fields longer than 512 chars in tmp table as varchar
fields.
In order to provide consistent behaviour, result of GROUP_CONCAT() now
will always be converted to blob if it is longer than 512 chars.
Item_func_group_concat::field_type() is modified accordingly.
mysql-test/t/func_gconcat.test:
Added test case for bug#14169: type of group_concat() result changed to blob if tmp_table was used
mysql-test/r/func_gconcat.result:
Added test case for bug#14169: type of group_concat() result changed to blob if tmp_table was used
sql/unireg.h:
Added the CONVERT_IF_BIGGER_TO_BLOB constant
sql/sql_select.cc:
Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used
The unnamed constant 255 in the create_tmp_field() and create_tmp_field_from_item() functions now defined as the CONVERT_IF_BIGGER_TO_BLOB constant.
The create_tmp_field() function now converts the Item_sum string result to a blob field based on its char length.
sql/item_sum.h:
Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used
To the Item_func_group_concat calls added the member function field_type() which returns the BLOB or VAR_STRING type based on the items length.
sql/item_func.cc:
Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used
In the Item_func::tmp_table_field() function the unnamed constant 255 is changed to the CONVERT_IF_BIGGER_TO_BLOB constant.
The Item_func::tmp_table_field() function now measures the result length in chars rather than bytes when converting string result to a blob.
Multiple equalities were not adjusted after reading constant tables.
It resulted in neglecting good index based methods that could be
used to access of other tables.
mysql-test/r/having.result:
Adjusted a test case results after fix for bug #16504.
mysql-test/r/select.result:
Added a test case for bug #16504.
mysql-test/r/subselect.result:
Adjusted a test case results after fix for bug #16504.
mysql-test/r/varbinary.result:
Adjusted a test case results after fix for bug #16504.
mysql-test/t/select.test:
Added a test case for bug #16504.
sql/item.cc:
Fixed bug #16504.
An Item_equal object may contain only a constant member.
It may happen after reading constant tables.
sql/item_cmpfunc.cc:
Fixed bug #16504.
Added method Item_equal::check_const that check appearance of new
constant items in a multiple equality.
sql/item_cmpfunc.h:
Fixed bug #16504.
Added method Item_equal::check_const that check appearance of new
constant items in a multiple equality.
sql/sql_select.cc:
Fixed bug #16504.
Adjusted multiple equalities after reading constant tables.
Fixed a few typo in comments.
After merge fix for bug#15560
item_sum.h:
After merge fix for bug#15560
sql/sql_select.cc:
After merge fix for bug#15560
sql/item_sum.h:
After merge fix for bug#15560
sql/item_sum.cc:
After merge fix for bug#15560
out of a nested join to the on conditions for the nest.
The bug happened due to:
1. The function simplify_joins could change on expressions for nested joins.
Yet modified on expressions were not saved in prep_on_expr.
2. On expressions were not restored for nested joins in
reinit_stmt_before_use.
mysql-test/r/join_nested.result:
Added a test case for bug #18279.
mysql-test/t/join_nested.test:
Added a test case for bug #18279.
sql/sql_prepare.cc:
Fixed bug #18279.
On expressions were not restored for nested joins in
reinit_stmt_before_use.
sql/sql_select.cc:
Fixed bug #18279.
The function simplify_joins could change on expressions for nested joins.
Yet modified on expressions were not saved in prep_on_expr.
The GROUP_CONCAT uses its own temporary table. When ROLLUP is present
it creates the second copy of Item_func_group_concat. This copy receives the
same list of arguments that original group_concat does. When the copy is
set up the result_fields of functions from the argument list are reset to the
temporary table of this copy.
As a result of this action data from functions flow directly to the ROLLUP copy
and the original group_concat functions shows wrong result.
Since queries with COUNT(DISTINCT ...) use temporary tables to store
the results the COUNT function they are also affected by this bug.
The idea of the fix is to copy content of the result_field for the function
under GROUP_CONCAT/COUNT from the first temporary table to the second one,
rather than setting result_field to point to the second temporary table.
To achieve this goal force_copy_fields flag is added to Item_func_group_concat
and Item_sum_count_distinct classes. This flag is initialized to 0 and set to 1
into the make_unique() member function of both classes.
To the TMP_TABLE_PARAM structure is modified to include the similar flag as
well.
The create_tmp_table() function passes that flag to create_tmp_field().
When the flag is set the create_tmp_field() function will set result_field
as a source field and will not reset that result field to newly created
field for Item_func_result_field and its descendants. Due to this there
will be created copy func to copy data from old result_field to newly
created field.
mysql-test/t/func_gconcat.test:
Added test for bug#15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
mysql-test/r/func_gconcat.result:
Added test for bug#15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
sql/sql_table.cc:
Fixed bug#15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
Added 0 as a last parameter to create_tmp_field() to force old behaviour.
sql/sql_select.cc:
Fixed bug#15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
Added the flag 'make_copy_field' to create_tmp_field(), so that for Item_result_field descendants create_tmp_field() sets the item's result field as a source field and deny resetting that result field to a new value.
sql/sql_class.h:
Fixed bug#15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
Added the flag 'force_copy_fields' to the structure TMP_TABLE_PARAM in order to make create_tmp_field() force the creation of 'copy_field' objects.
sql/mysql_priv.h:
Fixed bug#15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
Added the bool parameter 'make_copy_field' to create_tmp_field().
sql/item_sum.cc:
Fixed bug#15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
Added initialization of the force_copy_fields flag and passing it to create_tmp_table() through TMP_TBLE_PARAM in the Item_func_group_concat and Item_sum_count_distinct member functions.
sql/item_sum.h:
Fixed bug#15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
Added the flag 'force_copy_fields' to the Item_func_group_concat and Item_sum_count_distinct classes.
into mysql.com:/extern/mysql/5.0/bug16474/mysql-5.0-runtime
mysql-test/t/sp.test:
Auto merged
sql/sql_select.cc:
Auto merged
mysql-test/r/sp.result:
Manual merge.
mysql-test/r/ps.result:
Added test coverage for "order by" in prepared statements (related to BUG#16474).
mysql-test/r/sp.result:
Added reference to test case for BUG#16474.
mysql-test/t/ps.test:
Added test coverage for "order by" in prepared statements (related to BUG#16474).
mysql-test/t/sp.test:
Added reference to test case for BUG#16474.
sql/sql_select.cc:
Fixed comment and test for basic_const_item() instead of is_splocal().
Afterfix for bug#17366: Unchecked Item_int results in server crash
sql/sql_select.cc:
Afterfix for bug#17366: Unchecked Item_int results in server crash
When there is conjunction of conds, the substitute_for_best_equal_field()
will call the eliminate_item_equal() function in loop to build final
expression. But if eliminate_item_equal() finds that some cond will always
evaluate to 0, then that cond will be substituted by Item_int with value ==
0. In this case on the next iteration eliminate_item_equal() will get that
Item_int and treat it as Item_cond. This is leads to memory corruption and
server crash on cleanup phase.
To the eliminate_item_equal() function was added DBUG_ASSERT for checking
that all items treaten as Item_cond are really Item_cond.
The substitute_for_best_equal_field() now checks that if
eliminate_item_equal() returns Item_int and it's value is 0 then this
value is returned as the result of whole conjunction.
mysql-test/t/subselect.test:
Added test for bug#17366: Unchecked Item_int results in server crash
mysql-test/r/subselect.result:
Added test for bug#17366: Unchecked Item_int results in server crash
sql/sql_select.cc:
Fixed bug#17366: Unchecked Item_int results in server crash
To the eliminate_item_equal() function was added DBUG_ASSERT for checking
that all items treaten as Item_cond are really Item_cond.
The substitute_for_best_equal_field() now checks that if
eliminate_item_equal() returns something other than Item_cond and if it is
then this value is returned as the result of whole conjunction.
fix_fields() was not called for "order by" variables if the type was a
"constant integer", and thus interpreted as a column index.
However, a local variable is an expression and should not be interpreted
as a column index. Instead it behaves just like when using a user variable
for instance (i.e. it will not affect the ordering).
mysql-test/r/sp.result:
Updated results for new test case (BUG#16474).
mysql-test/t/sp.test:
New test case for BUG#16474.
sql/sql_select.cc:
When processing order list,
A subquery transformation changes the HAVING clause of the embedding query if the subquery contains
a GROUP BY clause. Yet the split_sum_func2 function was not applied to the modified HAVING clause.
This could result in wrong answers.
mysql-test/r/subselect.result:
Added a test case for bug #16603.
mysql-test/t/subselect.test:
Added a test case for bug #16603.
and possibly server crash in mysqld v5.0.
Reported MyISAM table was created in mysqld 4.1 and contains varchar field.
When binary files of that table was moved to 5.0, mysqld treats that varchar
field as a string field.
In order to make grouping server calculates group buffer, and because
that field is string server assumes it has fixed length and doesn't add
space for length, but later that field is converted to varchar field.
Due to this, when field values were actually copied, additional space for
length bytes is taken and buffer overrun occurs, which may lead to server crash.
The calc_group_buffer() function now reserves additional space for length
bytes for VAR_STRING fields, like for VARCHAR fields.
sql/sql_select.cc:
Fixed bug#16752 Binary table files created in mysqld v4.1 caused buffer overrun and possibly server crash in mysqld v5.0.
The calc_group_buffer() function now reserves additional space for length
bytes for VAR_STRING fields, like for VARCHAR fields.
