applied the new function is_union() to places
  in the code that check the same condition.
- 5.0->5.1 merge fixes


mysql-test/r/subselect3.result:
  merge 5.0->5.1 : updated explain.
sql/item_subselect.cc:
  addendum of the fix for bug 27786:
  applied the new function is_union() to the applicable places.
sql/sql_derived.cc:
  addendum of the fix for bug 27786:
  applied the new function is_union() to the applicable places.
sql/sql_parse.cc:
  addendum of the fix for bug 27786:
  applied the new function is_union() to the applicable places.
sql/sql_select.cc:
  addendum of the fix for bug 27786:
  applied the new function is_union() to places 
  in the code that check the same condition.
sql/sql_union.cc:
  addendum of the fix for bug 27786:
  applied the new function is_union() to the applicable places.
sql/sql_view.cc:
  addendum of the fix for bug 27786:
  applied the new function is_union() to the applicable places.
sql/sql_yacc.yy:
  addendum of the fix for bug 27786:
  applied the new function is_union() to the applicable places.

into  magare.gmz:/home/kgeorge/mysql/work/B27786-addon-5.1-opt


mysql-test/r/subselect3.result:
  Auto merged
mysql-test/r/view.result:
  Auto merged
sql/item_subselect.h:
  Auto merged
sql/sql_view.cc:
  Auto merged
mysql-test/t/view.test:
  fixed testcase merge 5.0->5.1
sql/sql_lex.h:
  merge fixes : 5.0->5.1

When merging views into the enclosing statement
the ORDER BY clause of the view is merged to the
parent's ORDER BY clause.
However when the VIEW is merged into an UNION
branch the ORDER BY should be ignored. 
Use of ORDER BY for individual SELECT statements
implies nothing about the order in which the rows
appear in the final result because UNION by default
produces unordered set of rows.
Fixed by ignoring the ORDER BY clause from the merge
view when expanded in an UNION branch.


mysql-test/r/view.result:
  Bug #27786: test case
mysql-test/t/view.test:
  Bug #27786: test case
sql/sql_lex.h:
  Bug #27786: add a is_union() inlined function
  Returns true if the unit represents an UNION.
sql/sql_view.cc:
  Bug #27786: ignore ORDER BY in mergeable views when in UNION context

conditions when executing an equijoin query with WHERE condition
containing a subquery predicate of the form join_attr NOT IN (SELECT ...).

To resolve a problem of the correct evaluation of the expression
  attr NOT IN (SELECT ...)
an array of guards is created to make it possible to filter out some 
predicates of the EXISTS subquery into which the original subquery 
predicate is transformed, in the cases when a takes the NULL value. 
If attr is defined as a field that cannot be NULL than such an array 
is not needed and is not created. 
However if the field a occurred also an an equijoin predicate t2.a=t1.b
and table t1 is accessed before table t2 then it may happen that the 
the EXISTS subquery is pushed down to the condition evaluated just after
table t1 has been accessed. In this case any occurrence of t2.a is 
substituted for t1.b. When t1.b takes the value of NULL an attempt is 
made to turn on the corresponding guard. This action caused a crash as 
no guard array had been created.

Now the code of Item_in_subselect::set_cond_guard_var checks that the guard
array has been created before setting a guard variable on. Otherwise the
method does nothing. It cannot results in returning a row that could be
rejected as the condition t2.a=t1.b will be checked later anyway.        


mysql-test/r/subselect3.result:
  Added a test case for bug #27870.
mysql-test/t/subselect3.test:
  Added a test case for bug #27870.
sql/item_subselect.h:
  Fixed bug #27870. The bug that causes crashes manifests itself at some
  conditions when executing an equijoin query with WHERE condition
  containing a subquery predicate of the form join_attr NOT IN (SELECT ...).
  
  Forced Item_in_subselect::set_cond_guard_var to check that the guard
  array has been created before setting a guard variable on. Otherwise the
  method does nothing.

  After merge fix.


mysql-test/r/subselect.result:
  After merge fix.

into  moonbone.local:/mnt/gentoo64/work/bk-trees/mysql-5.1-opt


mysql-test/r/subselect3.result:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_union.cc:
  Auto merged
mysql-test/r/subselect.result:
  Manual merge
mysql-test/t/subselect.test:
  Manual merge

  Fix warning after fix for bug#27321.


sql/item.cc:
  Fix warning after fix for bug#27321.

  After merge fix.


mysql-test/r/subselect.result:
  After merge fix.
mysql-test/t/subselect.test:
  After merge fix.

into  moonbone.local:/mnt/gentoo64/work/27321-bug-5.0-opt-mysql


mysql-test/r/subselect3.result:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/subselect.result:
  Manually merged
mysql-test/t/subselect.test:
  Manually merged
mysql-test/t/subselect3.test:
  Manually merged

The Item_outer_ref class based on the Item_direct_ref class was always used
to represent an outer field. But if the outer select is a grouping one and the 
outer field isn't under an aggregate function which is aggregated in that
outer select an Item_ref object should be used to represent such a field.
If the outer select in which the outer field is resolved isn't grouping then
the Item_field class should be used to represent such a field.
This logic also should be used for an outer field resolved through its alias
name.

Now the Item_field::fix_outer_field() uses Item_outer_field objects to
represent aliased and non-aliased outer fields for grouping outer selects
only.
Now the fix_inner_refs() function chooses which class to use to access outer
field - the Item_ref or the Item_direct_ref. An object of the chosen class
substitutes the original field in the Item_outer_ref object.
The direct_ref and the found_in_select_list fields were added to the
Item_outer_ref class.


mysql-test/t/subselect3.test:
  Some test cases were corrected after the fix for the bug#27321.
mysql-test/r/subselect3.result:
  Some test cases were corrected after the fix for the bug#27321.
mysql-test/t/subselect.test:
  Added a test case for the bug#27321: Wrong subquery result in a grouping select.
mysql-test/r/subselect.result:
  Added a test case for the bug#27321: Wrong subquery result in a grouping select.
  Some test cases were corrected after this fix.
sql/sql_union.cc:
  Bug#27321: Wrong subquery result in a grouping select.
  Cleanup of the inner_refs_list.
sql/sql_select.cc:
  Bug#27321: Wrong subquery result in a grouping select.
  Now the fix_inner_refs() function chooses which class to use to access outer
  field - the Item_ref or the Item_direct_ref. An object of the chosen class
  substitutes the original field in the Item_outer_ref object.
  A comment is corrected.
sql/item.cc:
  Bug#27321: Wrong subquery result in a grouping select.
  Now the Item_field::fix_outer_field() uses Item_outer_field objects to
  represent aliased and non-aliased outer fields for grouping outer selects
  only.
sql/item.h:
  Bug#27321: Wrong subquery result in a grouping select.
  The direct_ref and the found_in_select_list fields were added to the
  Item_outer_ref class.

into  mysql.com:/d2/hf/mrg/mysql-5.1-opt

into  mysql.com:/d2/hf/mrg/mysql-5.1-opt

into  mysql.com:/d2/hf/mrg/mysql-5.0-opt

into  mysql.com:/d2/hf/mrg/mysql-5.0-opt

into  mysql.com:/d2/hf/mrg/mysql-4.1-opt

into  bk-internal.mysql.com:/data0/bk/mysql-5.1-opt


mysql-test/r/view.result:
  Auto merged
mysql-test/t/view.test:
  Auto merged
sql/sql_delete.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-opt

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-opt

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-opt

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-opt

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-single-user


storage/ndb/tools/restore/Restore.hpp:
  Auto merged
storage/ndb/tools/restore/consumer_restore.cpp:
  Auto merged
mysql-test/r/ndb_restore.result:
  manual merge
mysql-test/t/ndb_restore.test:
  manual merge

- autoincrement column of size medium int not handled in ndb_restore
- added testcase also for other types, tiny, small... etc

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-opt

into  gshchepa.localdomain:/home/uchum/work/bk-trees/5507-ci

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-opt

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-single-user


storage/ndb/include/ndbapi/NdbRecAttr.hpp:
  Auto merged
storage/ndb/src/ndbapi/NdbRecAttr.cpp:
  Auto merged

Support of views wasn't implemented for the TRUNCATE statement.
Now TRUNCATE on views has the same semantics as DELETE FROM view:
mysql_truncate() checks whether the table is a view and falls back
to delete if so.
In order to initialize properly the LEX::updatable for a view
st_lex::can_use_merged() now allows usage of merged views for the
TRUNCATE statement.


mysql-test/r/truncate.result:
  Added a test case for the Bug#5507: TRUNCATE does not work with views.
mysql-test/t/truncate.test:
  Added a test case for the Bug#5507: TRUNCATE does not work with views.
sql/sql_lex.cc:
  Bug#5507: TRUNCATE does not work with views.
  can_use_merged() was denying of usage of merged views for a
  TRUNCATE statement. This results in improper initialization
  of view LEX::updatable. Fixed.
sql/sql_delete.cc:
  Bug#5507: TRUNCATE does not work with views.
  1.mysql_truncate() was lacking of check whether the table is view. Added.
  2.mysql_truncate() calls mysql_delete(), but mysql_delete() always reports
  errors as "DELETE" errors. Fixed.
mysql-test/t/view.test:
  Updated test case for Bug#14540: OPTIMIZE, ANALYZE, REPAIR applied 
  to not a view.
mysql-test/r/view.result:
  Updated test case for Bug#14540: OPTIMIZE, ANALYZE, REPAIR applied 
  to not a view.

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-opt

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-opt

into  whalegate.ndb.mysql.com:/home/tomas/mysql-4.1-opt

into  trift2.:/MySQL/M51/push-5.1


configure.in:
  Auto merged

into  trift2.:/MySQL/M50/push-5.0

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-opt

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-opt

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new-ndb

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new-ndb


storage/ndb/src/kernel/blocks/dbtup/DbtupCommit.cpp:
  Auto merged
storage/ndb/src/kernel/blocks/dbtup/DbtupRoutines.cpp:
  Auto merged
storage/ndb/test/include/HugoOperations.hpp:
  Auto merged
storage/ndb/test/run-test/daily-basic-tests.txt:
  Auto merged
storage/ndb/test/src/HugoOperations.cpp:
  Auto merged
storage/ndb/test/src/HugoTransactions.cpp:
  Auto merged
storage/ndb/include/kernel/AttributeHeader.hpp:
  merge
storage/ndb/include/ndbapi/NdbDictionary.hpp:
  merge
storage/ndb/src/ndbapi/NdbDictionaryImpl.cpp:
  merge
storage/ndb/src/ndbapi/ndb_cluster_connection.cpp:
  merge
storage/ndb/test/ndbapi/testBasic.cpp:
  merge

  make sure that copy tuple is released in all cases


storage/ndb/src/kernel/blocks/dbtup/DbtupCommit.cpp:
  make sure that copy tuple is released in all cases
storage/ndb/test/run-test/daily-basic-tests.txt:
  add testcase

  testcase only
  new pseudo column NDB$COPY_ROWID


storage/ndb/include/kernel/AttributeHeader.hpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/include/ndbapi/NdbDictionary.hpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/src/kernel/blocks/dbtup/DbtupRoutines.cpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/src/ndbapi/NdbDictionaryImpl.cpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/src/ndbapi/ndb_cluster_connection.cpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/test/ndbapi/testBasic.cpp:
  add testcase for bug#27756