MDEV-27653 long uniques don't work with unicode collations

1 files changed, 16 insertions, 1 deletions

diff --git a/sql/table.cc b/sql/table.cc
index a06834afd8b..2b5787d1511 100644
--- a/sql/table.cc
+++ b/sql/table.cc
@@ -1056,6 +1056,18 @@ static void mysql57_calculate_null_position(TABLE_SHARE *share,
   }
 }
 
+
+Item_func_hash *TABLE_SHARE::make_long_hash_func(THD *thd,
+                                                 MEM_ROOT *mem_root,
+                                                 List<Item> *field_list)
+                                                 const
+{
+  if (old_long_hash_function())
+    return new (mem_root) Item_func_hash_mariadb_100403(thd, *field_list);
+  return new (mem_root) Item_func_hash(thd, *field_list);
+}
+
+
 /** Parse TABLE_SHARE::vcol_defs
 
   unpack_vcol_info_from_frm
@@ -1267,7 +1279,10 @@ bool parse_vcol_defs(THD *thd, MEM_ROOT *mem_root, TABLE *table,
           list_item= new (mem_root) Item_field(thd, keypart->field);
         field_list->push_back(list_item, mem_root);
       }
-      Item_func_hash *hash_item= new(mem_root)Item_func_hash(thd, *field_list);
+
+      Item_func_hash *hash_item= table->s->make_long_hash_func(thd, mem_root,
+                                                               field_list);
+
       Virtual_column_info *v= new (mem_root) Virtual_column_info();
       field->vcol_info= v;
       field->vcol_info->expr= hash_item;