Talk about dropping to the floor in a tuxedo to pick up a brown cent.Rather than assign a player an attribute, you can use their player instance as a key on a bigger table. BobF for global temp table they are persistent only in the same sql instance if the table is left idle and the sql instance which created is destroyed then these tables are also removed. You're wasting CPU, I/O cycles, adding latency, fragmentation, and so on for the sake of saving literally 0.02 cents of hardware real state. The way to remove it is to explicitly drop the table, or restart the database instance. You can force that desired behavior by specifying a separate tablespace and datafile for that table alone.įinally, and utterly more important: Stop mortifying you and your DB engine for a measly 1 GB of data. Your rollback segments will thank you for that small relief and disk space will probably still be allocated for when you repopulate it again the next day. And have the perverse bonus of never giving a chance for the DB engine optimizer to assist you in any sort of crude optimization. The term selectable refers to any object that rows can be selected from in SQLAlchemy, these objects descend from FromClause and their distinguishing feature is their FromClause.c attribute, which is a namespace of all the columns contained within the FROM clause (these elements are themselves ColumnElement subclasses). If you already know that such a table will be permanently used ("daily basis" IS permanent), then create it as a normal table on a user database/schema.Įvery time that you delete and recreate the very same table you're fragmenting your whole database. user) are already there for that purpose. You're not doing your database any favors writing data to the temp DB for a manual, semi-permanent, user-driven basis. Note the oxymoronic concepts: "persistent" and "temp" are complete opposites. Worst case my plan is to create another DB on the same drive as tempdb, call it something like PseudoTempDB, and just handle the dropping myself.Īny insights would be greatly appreciated!Īfter 20 years of experience dealing with all major RDBMS in existence, I can only suggest a couple of things for your consideration: For example, the Fortify Attribute effect alters only basic attributes there are separate Fortify Health, Fortify Magicka, and Fortify Fatigue effects that apply to the derived attributes. In general, the term 'attribute' is used to refer just to the basic attributes, rather than the derived ones. I really don't want it in my existing DB because it will cause loads more headaches related to managing the DB (fragmentation, log growth, etc), since it's effectively rollup data, only useful for a 24 hour period, and takes up more than one gigabyte of HD space. There are eight basic attributes in Oblivion and four derived attributes. So, ideally I could just set something like set some timeout parameter, like "If nothing touches this for 1 hour, then delete". The term derived table and subquery is often used interchangeably. A derived table is similar to a temporary table, but using a derived table in the SELECT statement is much simpler than a temporary table because it does not require creating the temporary table. ![]() For an online transaction processing database using derived attributes is not always the best solution. A derived table is a virtual table returned from a SELECT statement. A summary table, refreshed daily, listed derived attributes was a great solution for reporting. Unfortunately if the table becomes unused, it gets deleted by SQL automatically - this is gracefully handled by my system, since it just queues it up to be rebuilt again, but ideally I would like it just to be built once a day. The query would have joined upwards of thirty tables with many aggregations such as sums and show all values an entity has had. Is it possible to have a 'persistent' temp table in MS-SQL? What I mean is that I currently have a background task which generates a global temp table, which is used by a variety of other tasks (which is why I made it global).
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