February 11, 2016

Export Heroku Postgres to CSV

I needed to export a table in a Heroku Postgres table. But the COPY query requires administrator privileges, and I don’t have those on heroku. Luckily you can use the \COPY command:

% heroku pg:psql --app my-app-production
---> Connecting to DATABASE_URL
my-app-production::DATABASE=> select count(*) from some_table;
 count
-------
 20910
(1 row)

my-app-production::DATABASE=> \copy (SELECT * FROM some_table) TO some_table.csv CSV DELIMITER ','
COPY 20910

This writes the contents of some_table to some_table.csv in your working directory.

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