Slash Boxes
NOTE: use Perl; is on undef hiatus. You can read content, but you can't post it. More info will be forthcoming forthcomingly.

All the Perl that's Practical to Extract and Report

use Perl Log In

Log In

[ Create a new account ]

tinman (2063)

  (email not shown publicly)

tinman spent a few years mucking around industry before going back to school for a Masters. Currently not enjoying the weather in North England..

He wrote Perl that looked suspiciously like C code in 1998, while working as an intern, and has been trying to cure that bad habit ever since.

Journal of tinman (2063)

Friday May 09, 2003
02:30 AM

Last guy off the blocks...

[ #12089 ]

As is usual for me, slow on the uptake, I completely missed the discussion and developments on this site about SQLite.. Having made the discovery yesterday, I downloaded, took home and tried to see how it stacked up against MySQL..

The data volume is moderately large, 13 million lines worth of inserts (thats roughly 4-5 million records) distributed among 3 tables. I have it in a 1GB text file.

I was originally going to use MySQL to store it (Oracle installations on my home machine, I dont think I need).. Looked around for a PostgreSQL Win32 install that I could use without Cygwin pain (didnt find it, sadly), so its a straight toss between SQLite (curiosity) and MySQL. (dont get me started on Access). The downers first: Its not a particularly high spec machine. In particular, I only have 256mb memory. The second is that the hard disk, although a large beast, is also slow.. (why o why did I turn down an offer for a 7.2k RPM disk ?)

I needed to massage the data a bit (pulled it off an Oracle db, so it had a to_date conversion which SQLite barfs on), so did that, created the tables, and left the SQL to run..

An hour later, I became impatient, broke off the import and queried, only to find that one table had a measly 300k records. The other tables were empty. Turns out (reading the speed test) that things are much much faster if you enclose all the inserts in a BEGIN transaction.

Now, what I need to do is figure out how to edit a 1GB file and embed BEGIN blocks before commits (there are commits every few thousand records).

What am I hoping to do with this ? err. just see how SQLite handles large volumes.. and then I can get away with not installing MySQL :) *wonders aloud if DBD::SQLite will work on Win32 ? dont think so*

The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
More | Login | Reply
Loading... please wait.