bk commit into 5.0 tree (timour:1.2253)

[timour]

Below is the list of changes that have just been committed into a local
5.0 repository of tkatchaounov. When tkatchaounov does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html

ChangeSet@stripped, 2006-08-28 16:08:48+02:00, timour@stripped +1 -0
  Merge tkatchaounov@stripped:/home/bk/mysql-5.0
  into  dl145s.mysql.com:/data/tkatchaounov/autopush/5.0-bug-21456
  MERGE: 1.2244.2.1

  sql/sql_select.cc@stripped, 2006-08-28 16:08:40+02:00, timour@stripped +0 -0
    Auto merged
    MERGE: 1.439.4.1

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	timour
# Host:	dl145s.mysql.com
# Root:	/data/tkatchaounov/autopush/5.0-bug-21456/RESYNC

--- 1.447/sql/sql_select.cc	2006-08-28 16:08:58 +02:00
+++ 1.448/sql/sql_select.cc	2006-08-28 16:08:58 +02:00
@@ -812,6 +812,40 @@
     if (!order && org_order)
       skip_sort_order= 1;
   }
+  /*
+     Check if we can optimize away GROUP BY/DISTINCT.
+     We can do that if there are no aggregate functions and the
+     fields in DISTINCT clause (if present) and/or columns in GROUP BY
+     (if present) contain direct references to all key parts of
+     an unique index (in whatever order).
+     Note that the unique keys for DISTINCT and GROUP BY should not
+     be the same (as long as they are unique).
+
+     The FROM clause must contain a single non-constant table.
+  */
+  if (tables - const_tables == 1 && (group_list || select_distinct) &&
+      !tmp_table_param.sum_func_count &&
+      (!join_tab[const_tables].select ||
+       !join_tab[const_tables].select->quick ||
+       join_tab[const_tables].select->quick->get_type() != 
+       QUICK_SELECT_I::QS_TYPE_GROUP_MIN_MAX))
+  {
+    if (group_list &&
+       list_contains_unique_index(join_tab[const_tables].table,
+                                 find_field_in_order_list,
+                                 (void *) group_list))
+    {
+      group_list= 0;
+      group= 0;
+    }
+    if (select_distinct &&
+       list_contains_unique_index(join_tab[const_tables].table,
+                                 find_field_in_item_list,
+                                 (void *) &fields_list))
+    {
+      select_distinct= 0;
+    }
+  }
   if (group_list || tmp_table_param.sum_func_count)
   {
     if (! hidden_group_fields && rollup.state == ROLLUP::STATE_NONE)
@@ -880,40 +914,6 @@
 			     &simple_group);
     if (old_group_list && !group_list)
       select_distinct= 0;
-  }
-  /*
-     Check if we can optimize away GROUP BY/DISTINCT.
-     We can do that if there are no aggregate functions and the
-     fields in DISTINCT clause (if present) and/or columns in GROUP BY
-     (if present) contain direct references to all key parts of
-     an unique index (in whatever order).
-     Note that the unique keys for DISTINCT and GROUP BY should not
-     be the same (as long as they are unique).
-
-     The FROM clause must contain a single non-constant table.
-  */
-  if (tables - const_tables == 1 && (group_list || select_distinct) &&
-      !tmp_table_param.sum_func_count &&
-      (!join_tab[const_tables].select ||
-       !join_tab[const_tables].select->quick ||
-       join_tab[const_tables].select->quick->get_type() != 
-       QUICK_SELECT_I::QS_TYPE_GROUP_MIN_MAX))
-  {
-    if (group_list &&
-       list_contains_unique_index(join_tab[const_tables].table,
-                                 find_field_in_order_list,
-                                 (void *) group_list))
-    {
-      group_list= 0;
-      group= 0;
-    }
-    if (select_distinct &&
-       list_contains_unique_index(join_tab[const_tables].table,
-                                 find_field_in_item_list,
-                                 (void *) &fields_list))
-    {
-      select_distinct= 0;
-    }
   }
   if (!group_list && group)
   {