Uncommented the failing test cases.

Commented out the failing test case from parts.partition_repair_myisam.test.
The test case has to be changed to bear the same semantics as before mwl106.
 

sql/sql_base.cc:
  Column for views should be looked in views (not in underlying table)
sql/sql_parse.cc:
  if we reread grants for single table we should read both database and tables grants for views (not only database grants).

sql/sql_expression_cache.cc:
  The call should not open the temporary table. It will be done later after its index creation.

The patch imposes unconditional materialization for derived tables
used in update and multi-update statements.
Fixed a bug with a wrong order of processing derived tables/views
at the prepare stage that caused a crash for the variant of the 
query from test case for bug 52157.

One was due the fact that the field SELECT_LEX::insert_tables was not
initialized while the second was due to missing initialization of
JOIN_TAB::preread_init_done in subselect_hash_sj_engine::make_unique_engine. 
Removed an invalid assert.

Two of them (in the function make_join_statistics and in the function
sort_and_filter_keyuse) were due to bad merges while the third bug was
triggered by uninitialized values of the field JOIN_TAB::preread_init_done.

Fixed a compiler warning in mysql_priv.h.

Commented out some queries from the funcs_1 suite returning wrong
errors due to bugs concerning updatable views (see bugs 784297 and
784303).

Adjusted some results for the test cases with derived tables from
different suites. 

After the fix of LP bug 784723 the test case returns the
right results.

Fields belonging to views in general cannot be substituted for 
equal items, in particular for constants, because all references
to a view field refer to the same Item_field object while they 
could be used in different OR parts of the where condition and
belong to different equivalence classes (to different Item_equals).
That's why substitution for equal items in any context is allowed
only in place of Item_direct_view_ref objects, but not in place of
Item_fields these objects refer to.
Due to some erroneous code in the patch for bug 717577 substitution
for view fields were allowed in some context.This could lead
to wrong results returned by queries using views.

The fix prohibits substitution of view fields for equal items 
in any context.

The patch also changes slightly the compile method for the Item_func
class. Now if the analyze method returns NULL in his parameter the
compile method is not called for the arguments of the function
at all. A similar change was made for the Item_ref class.     

- Fix CRLF end of lines, use LF instead

- in advance_sj_state(), remember join->cur_dups_producing_tables in 
  pos->prefix_dups_producing_tables *before* we modify it, so that 
  restore_prev_sj_state() restores cur_dups_producing_tables in all cases.
- Updated test results in subselect_sj2[_jcl6].result (the original EXPLAIN
  was invalid there)

Adjusted the result files in  the pbxt, innodb and innodb_plugin suites.

Commented out a failing test case in innodb.innodb_multi_update.test.
It should be returned back when the problem with multi-update of derived
tables (bug 784297) is resolved.

.bzr-mysql/default.conf:
  5.2 -> 5.3
sql/handler.h:
  Updated comments.

Fix based on suggestion by Zardosht Kasheff and Richard Prohaska) for making all clustered indexes equal in test_if_skip_sort_order()


sql/sql_select.cc:
  - Threat all clustered indexes equal in test_if_skip_sort_order().
    This is a temporary fix as the current code doesn't do proper cost analyizes for which index to use.
    I will address this later as the change required is not trivial.
  - Fixed a bug where select_limit was changed in the loop, which made different indexes see diferent values of select_limit

derived_view.test.
Do not register Item_ref objects of the type VIEW_REF as outer
references.

- Added a lot of code comments
- Updated get_best_ror_intersec() to prefer index scan on not clustered keys before clustered keys.
- Use HA_CLUSTERED_INDEX to define if one should use HA_MRR_INDEX_ONLY
- For test of using index or filesort to resolve ORDER BY, use HA_CLUSTERED_INDEX flag instead of primary_key_is_clustered()
- Use HA_TABLE_SCAN_ON_INDEX instead of primary_key_is_clustered() to decide if ALTER TABLE ... ORDER BY will have any effect.

sql/ha_partition.h:
  Added comment with warning for code unsafe to use with multiple storage engines at the same time
sql/handler.h:
  Added HA_CLUSTERED_INDEX.
  Documented primary_key_is_clustered()
sql/opt_range.cc:
  Added code comments
  Updated get_best_ror_intersec() to ignore clustered keys.
  Optimized away cpk_scan_used and one instance of current_thd (Simpler code)
  Use HA_CLUSTERED_INDEX to define if one should use HA_MRR_INDEX_ONLY
sql/sql_select.cc:
  Changed comment to #ifdef
  For test of using index or filesort to resolve ORDER BY, use HA_CLUSTERED_INDEX flag instead of primary_key_is_clustered()
  (Change is smaller than what it looks beause of indentation change)
sql/sql_table.cc:
  Use HA_TABLE_SCAN_ON_INDEX instead of primary_key_is_clustered() to decide if ALTER TABLE ... ORDER BY will have any effect.
storage/innobase/handler/ha_innodb.h:
  Added support for HA_CLUSTERED_INDEX
storage/innodb_plugin/handler/ha_innodb.cc:
  Added support for HA_CLUSTERED_INDEX
storage/xtradb/handler/ha_innodb.cc:
  Added support for HA_CLUSTERED_INDEX

client/mysqltest.cc:
  Column names.
mysql-test/r/grant_cache_no_prot.result:
  fix of text.
mysql-test/r/grant_cache_ps_prot.result:
  Fix of test.
mysql-test/r/query_cache.result:
  Switching on and off query cache.
mysql-test/t/query_cache.test:
  Switching on and off query cache.
mysys/charset.c:
  Fix of parser.
sql/handler.cc:
  thd added to parameters.
sql/log_event.cc:
  thd added to parameters.
sql/log_event_old.cc:
  thd added to parameters.
sql/mysql_priv.h:
  Fixed functions definitions.
sql/mysqld.cc:
  Comments stripping.
sql/set_var.cc:
  Switching on and off query cache.
sql/set_var.h:
  Switching on and off query cache.
sql/share/errmsg.txt:
  New errors.
sql/sql_cache.cc:
  Switching query cache on and off, removing comments.
sql/sql_cache.h:
  thd added to parameters.
sql/sql_class.h:
  Comments stripping.
sql/sql_db.cc:
  thd added to parameters.
sql/sql_lex.cc:
  lex fixed.
sql/sql_parse.cc:
  thd added to parameters.

The printing of include stack in the error case in mysqltest omitted the
bottom of the stack (the line number in original test case file), and instead
printed the top of the stack twice. Fix to print each element on the stack
once and only once.