WL#638 - Fix precedence for parsing NOT ... LIKE expression s

  Rework parser expression rules
  Rework handling for "||" concat/or
  Eliminate some shift/reduce conflicts
  Add support for "xxx IS [ NOT ] truth_value"


mysql-test/r/ansi.result:
  Fix test for new BROKEN_NOT mode bit
mysql-test/r/bool.result:
  WL#638
    New test for BROKEN_NOT mode
    New test for "expr IS [NOT] truth_value" syntax
mysql-test/r/sql_mode.result:
  Fix test for new BROKEN_NOT mode bit
mysql-test/t/bool.test:
  WL#638
    New test for BROKEN_NOT mode
    New test for "expr IS [NOT] truth_value" syntax
sql/lex.h:
  WL#638
    "&&" and "AND" return different tokens,
    NOT token changed to NOT_SYM
    OR_OR_CONCAT token changed to OR_OR_SYM
    New token "UNKNOWN"
sql/mysql_priv.h:
  WL#638
    New mode: BROKEN_NOT
sql/mysqld.cc:
  WL#638
    New mode: BROKEN_NOT
sql/set_var.cc:
  WL#638
    New mode: BROKEN_NOT
    BROKEN_NOT is set in MYSQL323 and MYSQL40 modes
sql/sql_lex.cc:
  Bug#638
    Alter tokens returned by lexer depending upon sql_mode:
    Return NOT2_SYM token instead of NOT_SYM when in BROKEN_NOT mode
    Return OR2_SYM token instead of OR_OR_SYM when not in PIPES_AS_CONCAT mode
sql/sql_yacc.yy:
  WL#638
    Change grammar to respect proper SQL syntax for NOT
    Clean up grammar, eliminate >100 shift/reduce conflicts
    New support for "expr IS [NOT] truth_value" SQL syntax
    Remove or_or_concat() support func. New support func is_truth_value()

4 files changed, 30 insertions, 2 deletions

diff --git a/mysql-test/r/ansi.result b/mysql-test/r/ansi.result
index 0b86634f67b..56676abba33 100644
--- a/mysql-test/r/ansi.result
+++ b/mysql-test/r/ansi.result
@@ -2,7 +2,7 @@ drop table if exists t1;
 set sql_mode="MySQL40";
 select @@sql_mode;
 @@sql_mode
-NO_FIELD_OPTIONS,MYSQL40
+NO_FIELD_OPTIONS,MYSQL40,BROKEN_NOT
 set @@sql_mode="ANSI";
 select @@sql_mode;
 @@sql_mode
diff --git a/mysql-test/r/bool.result b/mysql-test/r/bool.result
index a054eceec0c..1ef4b55fc36 100644
--- a/mysql-test/r/bool.result
+++ b/mysql-test/r/bool.result
@@ -33,6 +33,24 @@ a
 SELECT * FROM t1 where (1 AND a) IS NULL;
 a
 NULL
+set sql_mode='broken_not';
+select * from t1 where not a between 2 and 3;
+a
+set sql_mode=default;
+select * from t1 where not a between 2 and 3;
+a
+0
+1
+select a, a is false, a is true, a is unknown from t1;
+a	a is false	a is true	a is unknown
+0	1	0	0
+1	0	1	0
+NULL	0	0	1
+select a, a is not false, a is not true, a is not unknown from t1;
+a	a is not false	a is not true	a is not unknown
+0	0	1	1
+1	1	0	1
+NULL	1	1	0
 SET @a=0, @b=0;
 SELECT * FROM t1 WHERE NULL AND (@a:=@a+1);
 a
diff --git a/mysql-test/r/sql_mode.result b/mysql-test/r/sql_mode.result
index 67446829eca..c25ae99b530 100644
--- a/mysql-test/r/sql_mode.result
+++ b/mysql-test/r/sql_mode.result
@@ -61,7 +61,7 @@ t1	CREATE TABLE `t1` (
 set @@sql_mode="no_field_options,mysql323,mysql40";
 show variables like 'sql_mode';
 Variable_name	Value
-sql_mode	NO_FIELD_OPTIONS,MYSQL323,MYSQL40
+sql_mode	NO_FIELD_OPTIONS,MYSQL323,MYSQL40,BROKEN_NOT
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
diff --git a/mysql-test/t/bool.test b/mysql-test/t/bool.test
index b263ecfded2..644fdbfbf60 100644
--- a/mysql-test/t/bool.test
+++ b/mysql-test/t/bool.test
@@ -20,6 +20,16 @@ SELECT * FROM t1 where (1 AND a)=0;
 SELECT * FROM t1 where (1 AND a)=1;
 SELECT * FROM t1 where (1 AND a) IS NULL;
 
+# WL#638 - Behaviour of NOT does not follow SQL specification
+set sql_mode='broken_not';
+select * from t1 where not a between 2 and 3;
+set sql_mode=default;
+select * from t1 where not a between 2 and 3;
+
+# SQL boolean tests
+select a, a is false, a is true, a is unknown from t1;
+select a, a is not false, a is not true, a is not unknown from t1;
+
 # Verify that NULL optimisation works in AND clause:
 SET @a=0, @b=0;
 SELECT * FROM t1 WHERE NULL AND (@a:=@a+1);