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

into  rurik.mysql.com:/home/igor/mysql-5.0-opt

into  olga.mysql.com:/home/igor/mysql-5.0-opt

  Test case for bug#10977 altered to make it work in both plain and ps-protocol modes.

  Corrected the test case after fixing bug#10977

into  rurik.mysql.com:/home/igor/mysql-5.0-opt

  Fixed bug#10977: No warning issued if a column name is truncated
  New warning message is added.

When an alias is set to a column leading spaces are removed from the alias.
But when this is done on aliases set by user this can lead to confusion.

Now Item::set_name() method issues the warning if leading spaces were removed
from an alias set by user.

New warning message is added.

The bug caused a crash of the server if a subquery with
ORDER BY DESC used the range access method.
The bug happened because the method QUICK_SELECT_DESC::reset
was not reworked after MRR interface had been introduced.

The bug was due to a loss happened during a refactoring made
on May 30 2005 that modified the function JOIN::reinit.
As a result of it for any subquery the value of offset_limit_cnt
was not restored for the following executions. Yet the first 
execution of the subquery made it equal to 0.
The fix restores this value in the function JOIN::reinit.  

into  rurik.mysql.com:/home/igor/mysql-5.0-opt

Discussed with Kent.

into  macbook.gmz:/Users/kgeorge/mysql/work/B17212-5.0-opt

DESCRIBE returned the type BIGINT for a column of a view if the column
was specified by an expression over values of the type INT.
    
E.g. for the view defined as follows:
  CREATE VIEW v1 SELECT COALESCE(f1,f2) FROM t1
DESCRIBE returned type BIGINT for the only column of the view if f1,f2 are
columns of the INT type.
At the same time DESCRIBE returned type INT for the only column of the table
defined by the statement:
  CREATE TABLE t2 SELECT COALESCE(f1,f2) FROM t1.
    
This inconsistency was removed by the patch.

Now the code chooses between INT/BIGINT depending on the
precision of the aggregated column type.
 
Thus both DESCRIBE commands above returns type INT for v1 and t2.
 

into  moonbone.local:/work/tmp_merge-5.0-opt-mysql

into  moonbone.local:/work/tmp_merge-5.0-opt-mysql

into  moonbone.local:/home/evgen/bk-trees/mysql-5.0-opt

into  dl145k.mysql.com:/data0/mkindahl/bk/mysql-5.0-rpl

  * don't use join cache when the incoming data set is already ordered
    for ORDER BY
    This choice must be made because join cache will effectively
    reverse the join order and the results will be sorted by the index
    of the table that uses join cache.

into  moonbone.local:/work/16302-bug-4.1-opt-mysql

into  moonbone.local:/work/18503-bug-4.1-mysql

may return a wrong result.

An Item_sum_hybrid object has the was_values flag which indicates whether any
values were added to the sum function. By default it is set to true and reset
to false on any no_rows_in_result() call. This method is called only in
return_zero_rows() function. An ALL/ANY subquery can be optimized by MIN/MAX
optimization. The was_values flag is used to indicate whether the subquery
has returned at least one row. This bug occurs because return_zero_rows() is
called only when we know that the select will return zero rows before
starting any scans but often such information is not known.
In the reported case the return_zero_rows() function is not called and
the was_values flag is not reset to false and yet the subquery return no rows
Item_func_not_all and Item_func_nop_all functions return a wrong
comparison result.

The end_send_group() function now calls no_rows_in_result() for each item
in the fields_list if there is no rows were found for the (sub)query.

into  moonbone.local:/work/16302-bug-4.1-opt-mysql

into  moonbone.local:/home/evgen/bk-trees/mysql-4.1-opt

into  bodhi.local:/opt/local/work/mysql-5.0-runtime-merge-41

into  chilla.local:/home/mydev/mysql-5.0-amerge

into  trift2.:/M50/mysql-5.0

into  dl145k.mysql.com:/data0/mkindahl/bk/MERGE/mysql-5.0-merge

into  bodhi.local:/opt/local/work/mysql-5.0-runtime-merge-41

into  trift2.:/M50/mysql-5.0

into  moonbone.local:/work/allany-4.1-mysql

The ALL/ANY subqueries are the subject of MIN/MAX optimization. The matter
of this optimization is to embed MIN() or MAX() function into the subquery
in order to get only one row by which we can tell whether the expression
with ALL/ANY subquery is true or false.
But when it is applied to a subquery like 'select a_constant' the reported bug
occurs. As no tables are specified in the subquery the do_select() function 
isn't called for the optimized subquery and thus no values have been added 
to a MIN()/MAX() function and it returns NULL instead of a_constant.
This leads to a wrong query result.

For the subquery like 'select a_constant' there is no reason to apply
MIN/MAX optimization because the subquery anyway will return at most one row.
Thus the Item_maxmin_subselect class is more appropriate for handling such
subqueries.

The Item_in_subselect::single_value_transformer() function now checks
whether tables are specified for the subquery. If no then this subselect is
handled like a UNION using an Item_maxmin_subselect object.