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, 13 insertions, 0 deletions

diff --git a/mysql-test/r/negation_elimination.result b/mysql-test/r/negation_elimination.result
index a3a2bad7ec6..9193a125cd1 100644
--- a/mysql-test/r/negation_elimination.result
+++ b/mysql-test/r/negation_elimination.result
@@ -375,4 +375,17 @@ a
 13
 14
 15
+delete from t1 where a > 3;
+select a, not(not(a)) from t1;
+a	not(not(a))
+NULL	NULL
+0	0
+1	1
+2	1
+3	1
+explain extended select a, not(not(a)), not(a <= 2 and not(a)), not(a not like "1"), not (a not in (1,2)), not(a != 2) from t1 where not(not(a)) having not(not(a));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	index	NULL	a	5	NULL	5	Using where; Using index
+Warnings:
+Note	1003	select test.t1.a AS `a`,(test.t1.a <> 0) AS `not(not(a))`,((test.t1.a > 2) or test.t1.a) AS `not(a <= 2 and not(a))`,(test.t1.a like _latin1'1') AS `not(a not like "1")`,(test.t1.a in (1,2)) AS `not (a not in (1,2))`,(test.t1.a = 2) AS `not(a != 2)` from test.t1 where test.t1.a having test.t1.a
 drop table t1;