Re: How to lock a table for update and make other connections to wait on it
Thank you.
Regards
Vamsi
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Vamsi Krishna Reddy | Cisco Systems Limited | |||
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Think before you print.
From: Daniele Varrazzo [mailto:daniele.varrazzo@gmail.com]
Sent: Thursday, July 09, 2015 1:25 PM
To: Vamsi Krishna Reddy -T (vamsredd - TATA CONSULTANCY SERVICES LIMITED at Cisco)
Cc: psycopg@postgresql.org; Virag Jain (virajain)
Subject: Re: [psycopg] How to lock a table for update and make other connections to wait on it
On Thu, Jul 9, 2015 at 5:31 PM, Vamsi Krishna Reddy -T (vamsredd - TATA CONSULTANCY SERVICES LIMITED at Cisco) <vamsredd@cisco.com> wrote:
1. Insert a row to a table , using cursor.execute()
2. To fetch the row id of the above inserted data, we are using cursor.execute() to execute a sql command which fetches the max ‘id’ from the table (id is a column in the table which gets incremented on each insert)
You can use "INSERT ... RETURNING id" and avoid any concurrency issues.
-- Daniele
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