1 files changed, 4 insertions, 9 deletions
diff --git a/storage/csv/ha_tina.cc b/storage/csv/ha_tina.cc
index 0d9c019a19d..c9fab79a4c5 100644
--- a/storage/csv/ha_tina.cc
+++ b/storage/csv/ha_tina.cc
@@ -472,14 +472,6 @@ int ha_tina::encode_quote(uchar *buf)
     const char *ptr;
     const char *end_ptr;
     const bool was_null= (*field)->is_null();
-
-    /*
-      CSV does not support nulls. ::create() prevents creation of a table
-      with nullable columns so if we encounter them here, there is a bug.
-      This may only occur if the frm was created by an older version of
-      mysqld which permitted table creation with nullable columns.
-    */
-    DBUG_ASSERT(!(*field)->maybe_null());
     
     /*
       assistance for backwards compatibility in production builds.
@@ -1494,7 +1486,10 @@ int ha_tina::create(const char *name, TABLE *table_arg,
   for (Field **field= table_arg->s->field; *field; field++)
   {
     if ((*field)->real_maybe_null())
-      DBUG_RETURN(-1);
+    {
+      my_error(ER_CHECK_NOT_IMPLEMENTED, MYF(0), "nullable columns");
+      DBUG_RETURN(HA_ERR_UNSUPPORTED);
+    }
   }