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From: wufengke (@wufengke) <[email protected]>
To: pgjdbc/pgjdbc <[email protected]>
Subject: [pgjdbc/pgjdbc] issue #3726: BatchInsert + generatedKeys will cause insert block in DB
Date: Sun, 13 Jul 2025 14:32:13 +0000
Message-ID: <[email protected]> (raw)

version: 42.7.4

When I use the executeBatch() for a bulk(infact it's small) data insert and want return the generatedKeys, I find when the batch size is more than 50, it will sometimes block in the DB and does not return any more. I can not find the root cause. 
This issue still exists in the newest version.

The key point I think it related to the retrunGeneratedKeys, more keys returned and more chance it will happen.

If it is a known issure, what is the best practise to workaround if I want to get the  serial generated keys when insert data? Insert  without result key and find them by  a batch query after insert is a best way?

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