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From: Daniel Heath <[email protected]>
To: [email protected]
Subject: Prepared statement invalidation
Date: Fri, 16 Apr 2021 10:09:38 +1000
Message-ID: <[email protected]> (raw)

Hi All,

I'm running a site that has a reasonable amount of traffic 24/7 , writes and reads.

I've found that when I add a new column, I sometimes get a spike of errors on the application side due to prepared statement query plans getting invalidated, causing transactions to rollback.

The error is:

ERROR: cached plan must not change result type 

Is there a way to make postgres recalculate the query plan instead of failing the transaction when a new column is added?

Thanks,
Daniel Heath

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