bk commit into 5.0 tree (igor:1.1896)

[igor]

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ChangeSet
  1.1896 05/05/21 08:39:35 igor@stripped +1 -0
  sql_select.cc:
    Added missing comment for fix of #10561.

  sql/sql_select.cc
    1.323 05/05/21 08:38:27 igor@stripped +5 -0
    Added missing comment for fix of #10561.

# 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:	igor
# Host:	rurik.mysql.com
# Root:	/home/igor/dev/mysql-5.0-0

--- 1.322/sql/sql_select.cc	Sat May 21 06:06:14 2005
+++ 1.323/sql/sql_select.cc	Sat May 21 08:38:27 2005
@@ -2825,6 +2825,11 @@
   if (cond_func->functype() == Item_func::NOT_FUNC)
   {
     Item *item= cond_func->arguments()[0];
+    /* 
+       At this moment all NOT before simple comparison predicates
+       are eliminated. NOT IN and NOT BETWEEN are treated similar
+       IN and BETWEEN respectively.
+    */
     if (item->type() == Item::FUNC_ITEM &&
         ((Item_func *) item)->select_optimize() == Item_func::OPTIMIZE_KEY)
     {