Bug#46616: Merge

mysql-test/r/auto_increment.result:
  Bug#46616: Test result.
mysql-test/t/auto_increment.test:
  Bug#46616: Test case.
sql/sql_update.cc:
  Bug#46616: Fix.

mysql-test/r/auto_increment.result

@@ -462,3 +462,17 @@ select last_insert_id();
 last_insert_id()
 3
 drop table t1;
+#
+# Bug#46616: Assertion `!table->auto_increment_field_not_null' on view   
+# manipulations
+#
+CREATE TABLE t1 ( a INT );
+INSERT INTO t1 VALUES (1), (1);
+CREATE TABLE t2 ( a INT AUTO_INCREMENT KEY );
+CREATE TABLE IF NOT EXISTS t2 AS SELECT a FROM t1;
+ERROR 23000: Duplicate entry '1' for key 'PRIMARY'
+UPDATE t2 SET a = 2;
+SELECT a FROM t2;
+a
+2
+DROP TABLE t1, t2;

mysql-test/t/auto_increment.test

@@ -324,3 +324,21 @@ insert into t1 values(null,0,0,0,null);
 replace into t1 values(null,1,0,2,null);
 select last_insert_id();
 drop table t1;
+
+--echo #
+--echo # Bug#46616: Assertion `!table->auto_increment_field_not_null' on view   
+--echo # manipulations
+--echo #
+CREATE TABLE t1 ( a INT );
+INSERT INTO t1 VALUES (1), (1);
+
+CREATE TABLE t2 ( a INT AUTO_INCREMENT KEY );
+--error ER_DUP_ENTRY
+CREATE TABLE IF NOT EXISTS t2 AS SELECT a FROM t1;
+
+UPDATE t2 SET a = 2;
+
+SELECT a FROM t2;
+
+DROP TABLE t1, t2;
+

sql/sql_update.cc

@@ -730,6 +730,7 @@ int mysql_update(THD *thd,
       break;
     }
   }
+  table->auto_increment_field_not_null= FALSE;
   dup_key_found= 0;
   /*
     Caching the killed status to pass as the arg to query event constuctor;