SELECT Surprise

While experimenting with unicode values in Python, PostgreSQL and pyscopg2, I ran a little query like this:

>>> cur.execute("SELECT (note_id, body) FROM troy.morenotes")
>>> cur.fetchall()
[('(1,"The rain in Spain falls mainly in the plains.")',),
('(2,"Twenty dwarves did handstands on the carpet.")',),
('(5,I\xc3\xb1t\xc3\xabrn\xc3\xa2ti\xc3\xb4n\xc3\xa0liz\xc3\xa6ti\xc3\xb8n)',)]


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June 13, 2006 | Categories: postgresql, python | Comments Off on SELECT Surprise

Automatic Pickle Serialization and Deserialization with PostgreSQL

Building on the earlier success of creating a pickle data type in PostgreSQL, I’ve come up with this small and comfortable way of automatically serializing and de-serializing python pickles with PostgreSQL and psycopg2.

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June 13, 2006 | Categories: postgresql, python | Comments Off on Automatic Pickle Serialization and Deserialization with PostgreSQL

A Tale of PostgreSQL Types and Python

Thinking of integrating user-defined types in PostgreSQL and psycopg2? Here’s the path I walked, hopefully you can avoid the same pitfalls.

I was after a PostgreSQL data type for storing Python pickles. This seemed simple enough because the database facility for aliasing a type already exists. So the first thing I tried was a CREATE DOMAIN statement in PG, like so:
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June 6, 2006 | Categories: postgresql, python | Comments Off on A Tale of PostgreSQL Types and Python