Bug#41371 Select returns 1 row with condition "col is not null and col is null"

    For application compatibility reasons  MySQL converts "<autoincrement_column> IS NULL"
    predicates to "<autoincrement_column> = LAST_INSERT_ID()" in the first SELECT following an
    INSERT regardless of whether they're top level predicates or not. This causes wrong and
    obscure results when these predicates are combined with others on the same columns. Fixed
    by only doing the transformation on a single top-level predicate if a special SQL mode is
    turned on (sql_auto_is_null).
    Also made sql_auto_is_null off by default.

per-file comments:
  mysql-test/r/func_isnull.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
    test result updated

  mysql-test/t/func_isnull.test
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
    test case added

  sql/mysqld.cc
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
    sql_auto_is_null now is OFF by default.

  sql/sql_select.cc
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
    remove_eq_conds() split in two parts - one only checks the upper condition,
    the req_remove_eq_conds() recursively checks all the condition tree.

  mysql-test/extra/rpl_tests/rpl_insert_id.test
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        test fixed (set the sql_auto_is_null variable)

  mysql-test/r/mysqlbinlog.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/r/mysqlbinlog2.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/r/odbc.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/r/query_cache.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/r/user_var-binlog.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/suite/binlog/r/binlog_row_ctype_ucs.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/suite/binlog/r/binlog_stm_ctype_ucs.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/suite/rpl/r/rpl_insert_id.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/suite/rpl/r/rpl_row_mysqlbinlog.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/suite/rpl/r/rpl_sp.result
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        result updated

  mysql-test/t/odbc.test
Bug#41371      Select returns 1 row with condition "col is not null and col is null"
        test fixed (set the sql_auto_is_null variable)

6 files changed, 54 insertions, 48 deletions

diff --git a/mysql-test/r/func_isnull.result b/mysql-test/r/func_isnull.result
index 20ddc87ee78..79aecc7d82b 100644
--- a/mysql-test/r/func_isnull.result
+++ b/mysql-test/r/func_isnull.result
@@ -5,3 +5,8 @@ flush tables;
 select * from t1 where isnull(to_days(mydate));
 id	mydate
 drop table t1;
+CREATE TABLE t1 (id INTEGER UNSIGNED NOT NULL AUTO_INCREMENT, PRIMARY KEY(id));
+INSERT INTO t1( id ) VALUES ( NULL );
+SELECT t1.id  FROM t1  WHERE (id  is not null and id is null );
+id
+DROP TABLE t1;
diff --git a/mysql-test/r/mysqlbinlog.result b/mysql-test/r/mysqlbinlog.result
index 5f32561798b..ff060f02c06 100644
--- a/mysql-test/r/mysqlbinlog.result
+++ b/mysql-test/r/mysqlbinlog.result
@@ -21,7 +21,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1000000000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -67,7 +67,7 @@ DELIMITER /*!*/;
 use test/*!*/;
 SET TIMESTAMP=1000000000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -99,7 +99,7 @@ DELIMITER /*!*/;
 use test/*!*/;
 SET TIMESTAMP=1000000000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -121,7 +121,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1000000000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -167,7 +167,7 @@ DELIMITER /*!*/;
 use test/*!*/;
 SET TIMESTAMP=1000000000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -199,7 +199,7 @@ DELIMITER /*!*/;
 use test/*!*/;
 SET TIMESTAMP=1000000000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -299,7 +299,7 @@ DELIMITER /*!*/;
 use test/*!*/;
 SET TIMESTAMP=1000000000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -349,7 +349,7 @@ DELIMITER /*!*/;
 use test/*!*/;
 SET TIMESTAMP=1000000000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
diff --git a/mysql-test/r/mysqlbinlog2.result b/mysql-test/r/mysqlbinlog2.result
index dba9bdc9d70..62df4731d47 100644
--- a/mysql-test/r/mysqlbinlog2.result
+++ b/mysql-test/r/mysqlbinlog2.result
@@ -22,7 +22,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -65,7 +65,7 @@ SET INSERT_ID=1/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -104,7 +104,7 @@ SET INSERT_ID=4/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609946/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -130,7 +130,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -165,7 +165,7 @@ SET INSERT_ID=4/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609946/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -188,7 +188,7 @@ SET INSERT_ID=3/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609944/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -218,7 +218,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -249,7 +249,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -284,7 +284,7 @@ SET INSERT_ID=6/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609943/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -307,7 +307,7 @@ SET INSERT_ID=1/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -338,7 +338,7 @@ SET INSERT_ID=6/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609943/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -361,7 +361,7 @@ SET INSERT_ID=4/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609946/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -380,7 +380,7 @@ SET INSERT_ID=6/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609943/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -402,7 +402,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -448,7 +448,7 @@ SET INSERT_ID=3/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609944/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -471,7 +471,7 @@ SET INSERT_ID=6/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609943/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -493,7 +493,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -523,7 +523,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -566,7 +566,7 @@ SET INSERT_ID=1/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -604,7 +604,7 @@ SET INSERT_ID=4/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609946/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -630,7 +630,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -664,7 +664,7 @@ SET INSERT_ID=4/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609946/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -687,7 +687,7 @@ SET INSERT_ID=3/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609944/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -717,7 +717,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -747,7 +747,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -782,7 +782,7 @@ SET INSERT_ID=6/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609943/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -805,7 +805,7 @@ SET INSERT_ID=1/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -836,7 +836,7 @@ SET INSERT_ID=6/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609943/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -858,7 +858,7 @@ SET INSERT_ID=4/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609946/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -877,7 +877,7 @@ SET INSERT_ID=6/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609943/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -899,7 +899,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -945,7 +945,7 @@ SET INSERT_ID=3/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609944/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -968,7 +968,7 @@ SET INSERT_ID=6/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609943/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -990,7 +990,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
@@ -1020,7 +1020,7 @@ ROLLBACK/*!*/;
 use test/*!*/;
 SET TIMESTAMP=1579609942/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
diff --git a/mysql-test/r/odbc.result b/mysql-test/r/odbc.result
index 5629d3dab33..3dbac12ca7c 100644
--- a/mysql-test/r/odbc.result
+++ b/mysql-test/r/odbc.result
@@ -1,4 +1,5 @@
 drop table if exists t1;
+set @@session.sql_auto_is_null=1;
 select {fn length("hello")}, { date "1997-10-20" };
 {fn length("hello")}	1997-10-20
 5	1997-10-20
@@ -7,9 +8,9 @@ insert into t1 SET A=NULL,B=1;
 insert into t1 SET a=null,b=2;
 select * from t1 where a is null and b=2;
 a	b
-2	2
 select * from t1 where a is null;
 a	b
+2	2
 explain select * from t1 where b is null;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
@@ -25,3 +26,4 @@ SELECT sql_no_cache a, last_insert_id() FROM t1;
 a	last_insert_id()
 1	1
 DROP TABLE t1;
+set @@session.sql_auto_is_null=default;
diff --git a/mysql-test/r/query_cache.result b/mysql-test/r/query_cache.result
index 89057603c3d..6c6d357a462 100644
--- a/mysql-test/r/query_cache.result
+++ b/mysql-test/r/query_cache.result
@@ -342,19 +342,18 @@ create table mysqltest.t1 (i int not null auto_increment, a int, primary key (i)
 insert into mysqltest.t1 (a) values (1);
 select * from mysqltest.t1 where i is null;
 i	a
-1	1
 create table t1(a int);
 select * from t1;
 a
 show status like "Qcache_queries_in_cache";
 Variable_name	Value
-Qcache_queries_in_cache	1
+Qcache_queries_in_cache	2
 select * from mysqltest.t1;
 i	a
 1	1
 show status like "Qcache_queries_in_cache";
 Variable_name	Value
-Qcache_queries_in_cache	2
+Qcache_queries_in_cache	3
 drop database mysqltest;
 show status like "Qcache_queries_in_cache";
 Variable_name	Value
diff --git a/mysql-test/r/user_var-binlog.result b/mysql-test/r/user_var-binlog.result
index 05efea79fe7..b9587bedc05 100644
--- a/mysql-test/r/user_var-binlog.result
+++ b/mysql-test/r/user_var-binlog.result
@@ -22,7 +22,7 @@ SET @`a b`:=_latin1 0x68656C6C6F COLLATE `latin1_swedish_ci`/*!*/;
 use test/*!*/;
 SET TIMESTAMP=10000/*!*/;
 SET @@session.pseudo_thread_id=999999999/*!*/;
-SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
+SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;