While working on one of the workflows of Alteryx with PostgreSQL data sources, I started getting this wierd error –

Error SQLExecute: Out of memory while reading tuples.; memory allocation error???

This was a unusual error. For one I was running this not on my local machine but on the Gallery which was governed by the server. Also I felt Alteryx folks could have done away with three question marks (???). It feels as if we are being questioned on the memory allocation and it’s just waiting for some confirmation.

This is one of those classic it-works-in-dev-not-in-prod kind of problem. I then went back and compared the two ODBC data source settings across both the environments. It was here I could see the problem. You need to set the setting for PostgreSQL ODBC data source to have ‘Use Declare/Fetch’ option set in.

Open up the ‘ODBC Data Source Administrator’ window after running it as administrator. Click on the ‘Data Source’ that you are using and click on ‘Configure’. In the ‘PostgreSQL ANSI ODBC Driver (psqlODBC) Setup’ window, click on ‘Datasource’. Ensure that the checkbox ‘Use Declare/Fetch’ is checked and then click on ‘OK’ and close the subsequent windows. This setting resolves the issue. Below is the screenshot