after review patch

mysql-test/r/negation_elimination.result:
  new tests of negation elimination
mysql-test/t/negation_elimination.test:
  new tests of negation elimination
sql/item.h:
  test of boolean functions added
sql/item_cmpfunc.cc:
  NOT subtree is already checked, so wee need to return just argument
sql/item_cmpfunc.h:
  test of boolean functions added
sql/mysql_priv.h:
  'place' to detect WHERE clause
sql/sql_parse.cc:
  function for creation negated expression
sql/sql_select.cc:
  removed unused function
sql/sql_select.h:
  removed unused function
sql/sql_yacc.yy:
  'place' to detect WHERE clause

1 files changed, 3 insertions, 0 deletions

diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index c3551b35d63..f1a2b11aaa8 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -89,6 +89,7 @@ public:
   Item_bool_func(Item *a) :Item_int_func(a) {}
   Item_bool_func(Item *a,Item *b) :Item_int_func(a,b) {}
   Item_bool_func(THD *thd, Item_bool_func *item) :Item_int_func(thd, item) {}
+  bool is_bool_func() { return 1; }
   void fix_length_and_dec() { decimals=0; max_length=1; }
 };
 
@@ -201,6 +202,7 @@ public:
   bool have_rev_func() const { return rev_functype() != UNKNOWN_FUNC; }
   void print(String *str) { Item_func::print_op(str); }
   bool is_null() { return test(args[0]->is_null() || args[1]->is_null()); }
+  bool is_bool_func() { return 1; }
   CHARSET_INFO *compare_collation() { return cmp.cmp_collation.collation; }
 
   friend class  Arg_comparator;
@@ -748,6 +750,7 @@ class Item_func_in :public Item_int_func
   enum Functype functype() const { return IN_FUNC; }
   const char *func_name() const { return " IN "; }
   bool nulls_in_row();
+  bool is_bool_func() { return 1; }
   CHARSET_INFO *compare_collation() { return cmp_collation.collation; }
 };