MDEV-22756 SQL Error (1364): Field 'DB_ROW_HASH_1' doesn't have a default value

exclude generated columns from the "has default value" check

mysql-test/main/long_unique_bugs.result

@@ -448,5 +448,11 @@ a	b
 1	xxx
 drop table t1;
 #
+# MDEV-22756 SQL Error (1364): Field 'DB_ROW_HASH_1' doesn't have a default value
+#
+create table t1 (f text not null, unique (f));
+insert into t1 (f) select 'f';
+drop table t1;
+#
 # End of 10.4 tests
 #

mysql-test/main/long_unique_bugs.test

@@ -442,6 +442,13 @@ insert into t1 (a,b) select 1,'xxx' from seq_1_to_5;
 select * from t1;
 drop table t1;
 
+--echo #
+--echo # MDEV-22756 SQL Error (1364): Field 'DB_ROW_HASH_1' doesn't have a default value
+--echo #
+create table t1 (f text not null, unique (f));
+insert into t1 (f) select 'f';
+drop table t1;
+
 --echo #
 --echo # End of 10.4 tests
 --echo #

sql/sql_insert.cc

@@ -2134,7 +2134,7 @@ int check_that_all_fields_are_given_values(THD *thd, TABLE *entry, TABLE_LIST *t
   for (Field **field=entry->field ; *field ; field++)
   {
     if (!bitmap_is_set(write_set, (*field)->field_index) &&
-        !(*field)->vers_sys_field() &&
+        !(*field)->vers_sys_field() && !(*field)->vcol_info &&
         has_no_default_value(thd, *field, table_list) &&
         ((*field)->real_type() != MYSQL_TYPE_ENUM))
       err=1;