subqueries on information schema that use MIN/MAX aggregation.
Execution of some correlated subqueries may set the value
of null_row to 1 for tables used in the subquery.
If the the subquery is on information schema it causes
rejection of any row for the following executions of
the subquery in the case when an optimization filtering
by some condition is applied.
The fix restores the value of the null_row flag for
each execution of a subquery on information schema.
When a wildcard database name is given the mysqlshow, but that wildcard
matches one database *exactly* (it contains the wildcard character), we
list the contents of that database instead of just listing the database
name as matching the wildcard. Probably the most common instance of users
encountering this behavior would be with "mysqlshow information_schema".
The Item::tmp_table_field_from_field_type() function creates Field_datetime
object instead of Field_timestamp object for timestamp field thus always
changing data type is a tmp table is used.
The Field_blob object constructor which is used in the
Item::tmp_table_field_from_field_type() is always setting packlength field of
newly created blob to 4. This leads to changing fields data type for example
from the blob to the longblob if a temporary table is used.
The Item::make_string_field() function always converts Field_string objects
to Field_varstring objects. This leads to changing data type from the
char/binary to varchar/varbinary.
Added appropriate Field_timestamp object constructor for using in the
Item::tmp_table_field_from_field_type() function.
Added Field_blob object constructor which sets pack length according to
max_length argument.
The Item::tmp_table_field_from_field_type() function now creates
Field_timestamp object for a timestamp field.
The Item_type_holder::display_length() now returns correct NULL length NULL
length.
The Item::make_string_field() function now doesn't change Field_string to
Field_varstring in the case of Item_type_holder.
The Item::tmp_table_field_from_field_type() function now uses the Field_blob
constructor which sets packlength according to max_length.
This was only demonstrated by the use of PASSWORD(), it was not related to
that function at all. The calculation of the size of a field in the results
of a UNION did not take into account the possible growth of a string field
when being converted to the aggregated character set.
When making a place to store field values at the start of each group
the real item (not the reference) must be used when deciding which column
to copy.
An aggregate function reference was resolved incorrectly and
caused a crash in count_field_types.
Must use real_item() to get to the real Item instance through
the reference
The problem was that store_top_level_join_columns() incorrectly assumed
that the left/right neighbor of a nested join table reference can be only
at the same level in the join tree.
The fix checks if the current nested join table reference has no immediate
left/right neighbor, and if so chooses the left/right neighbors of the
nearest upper level, where these references are != NULL.
- Make mysql-test-run.pl restart a crashed/stopped process if it was expected it should crash.
- Added testcase for "crash_commit_before", which tests behaviour when server crashes just before commit.
* The testcase first write a small var/tmp/master0.expect file indicating expected crash
* Then sets "DEBUG" variable to for example "d,crash_commit_before" and then executes a commit.
* The server will crash and be brought back up by mysql-test-run.pl
* Test case will then wait for the process to come back online before continuing.
Fix for the bug in mysql-test-run.pl which prevents other tests succeed
after IM-test failure.
The idea of the fix of BUG#20716 is to:
1. Check each SHOW INSTANCES statement, add necessary "sleep" instruction before;
2. Move all environment checkings into the one file and include it everywhere.
