Blake's Journal » PostgreSQL

PGWest 2011 Slides

Blake — Wed, 05 Oct 2011 23:38:00 +0000

The slides from my PostGIS mini-tutorial talk that I gave at PGWest 2011 are now available here.

PGWest: Here I Come!

Blake — Mon, 19 Sep 2011 19:53:57 +0000

I will be speaking on two occasions at PGWest next week.

My first talk will be a mini-tutorial about how to install and use PostGIS. This is great for anyone who is interested in learning more about GIS in general as well.

My second talk will be the same one I gave at PGCon 2011 this year in Ottawa, Canada. I’ll discuss how World Flight Planner uses PostgreSQL and PostGIS for its flight planning back end.

A copy of both presentations will be available online.

Ontario Energy Board TOU Pricing in SQL

Blake — Fri, 17 Jun 2011 03:24:39 +0000

If, for whatever reason, you need to know when a particular time-stamp in your database occurs during the on-peak, mid-peak, or off-peak times for time of use pricing in Ontario, you can use the following SQL.

These rules are accurate as of the date of this post.

Let me walk you through the nested CASE statements:

Is it a weekend? if so: off-peak, else: step 2
Is it summer? (May 1 to October 31) if so: step 3, else: step 4.
Figure out what time it is and apply the proper pricing.
Figure out what time it is and apply the proper pricing for winter rates.

This logic does not take into account holidays. Official OEB holidays can be found at their site. If anyone has a suggestion on how I can incorporate the holidays as well, please let me know.

Using PostgreSQL for Flight Planning

Blake — Wed, 25 May 2011 02:47:21 +0000

My slides have been posted up at the PgCon website (bottom of page). All-in-all it was a great conference, with some take-aways.

If anyone is interested in any more specific details about my talk or the conference as a whole, please don’t hesitate to ask.

PgCon 2011 Talks

Blake — Wed, 18 May 2011 19:19:43 +0000

Here are the talks I plan on attending at PGCon 2011. I’m thankful that there haven’t been any conflicts since there will be three talks on at any given time.

Day 1:

9:00: PostGIS Knows Where You Are. By: Paul Ramsey
10:00: Database Scalability Patterns: Sharding for Unlimited Growth. By: Robert Treat
11:30: MVCC Unmasked. By: Bruce Momjian
13:30: Maintaining Terabytes. By: Selena Deckelmann
15:00: NTT’s Case Report. By Tetsuo Sakata
16:30: Securing PostgreSQL from External Attack. By: Bruce Momjian
17:30: Lightning Talks. (I’ll be doing a presentation on Postgres at CBC)

Day 2:

10:00: Range Types. By Jeff Davis
11:30: SP-GiST – A New Indexing Infrastructure for PostgreSQL. By: Oleg Bartunov & Teodor Sigaev
13:30: Doing Bioinformatics in PostgreSQL. By: Luis Carvalho
15:00: Using PostgreSQL for Flight Planning. By: Blake Crosby
16:30: Running PostgreSQL in an Enterprise Level Telco Systems. By: Ilya Kosmodemiansky

The entire schedule of all events can be found on the PgCon website. I’ll also be posting my slides up here for anyone to view after the conference.