Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
Databases

PostgreSQL 9.3 Will Feature UPDATEable Views 68

Picking up work abandoned around Postgres 8.2, a patch recently hit the PostgreSQL 9.3 branch that adds SQL-92 automatically updatable views. For many common cases, you will no longer have to write hairy triggers to fake UPDATE support (e.g. if you have a view that hides a few internal columns). Limitations currently include only supporting views with at most one table in the FROM clause. This complements the under-advertised INSTEAD OF trigger support added in 9.1.
This discussion has been archived. No new comments can be posted.

PostgreSQL 9.3 Will Feature UPDATEable Views

Comments Filter:
  • Good use-case? (Score:5, Interesting)

    by nobodyman ( 90587 ) * on Wednesday December 12, 2012 @01:16PM (#42262315) Homepage

    Back when I was working w/ Oracle (10 i think) I remember trying out update-able views, but I found that the rules and restrictions were such that it seemed like only trivial views could be updated and I decided I was easier to just work w/ the underlying tables and/or write sprocs whenever I need to do more far-reaching updates.

    That said, I never dug that deep into the subject. Do any slashdotters know of a situation where an update-able view would be handy/ideal?

  • The Rules System (Score:3, Interesting)

    by Anonymous Coward on Wednesday December 12, 2012 @02:20PM (#42263157)

    This is a nice feature for standardization (and thus, compatibility and portability with other SQL systems) but it's also important to know that PostgreSQL also has a "rules" system that allows for much more complicated view/table relationships. Rules allow for you to redirect the new and old values to updates, inserts and delete statements across as many tables/rows as required based on query being run against a view. It is very similar to a trigger really.

    Read more about it here: http://www.postgresql.org/docs/9.2/static/rules.html

    I used the Rules system to handle most of the security within The Schemaverse (schemaverse.com), an application written completely within a PostgreSQL database.

Chemistry is applied theology. -- Augustus Stanley Owsley III

Working...