use LONGBLOB instead of LONGTEXT because collation is not required.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27073 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/CachePlugins/SQLCache.py

@@ -69,7 +69,7 @@ class SQLCache(BaseCache):
   cache_expire_check_interval = 3600
     
   create_table_sql = '''CREATE TABLE %s(cache_id VARBINARY(970) NOT NULL, 
-                                         value LONGTEXT,
+                                         value LONGBLOB,
                                          scope VARBINARY(20),
                                          stored_at INT,
                                          cache_duration INT DEFAULT 0,