PostgresDB 02001: No Additional Dynamic Result Sets Returned
No additional dynamic result sets returned.
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What is
PostgresDB 02001: No Additional Dynamic Result Sets Returned
?
When encountering the error "02001: No Additional Dynamic Result Sets Returned" from a PostgreSQL database, the user should execute the following actions for immediate investigation:
- Check the current server log: Look for any related errors or warnings that occurred around the same time as the 02001 error. This can provide context or a more specific cause. Use the command:
SELECT * FROM pg_read_file('serverlog', OFFSET, LENGTH) WHERE log_line LIKE '%02001%';- Replace
OFFSETandLENGTHwith appropriate values to specify the part of the log file you want to read, or adjust the query to your needs if you're accessing logs differently. - Review the query or transaction that caused the error: Specifically, look at the SQL code that was being executed at the time. This error usually occurs within a PL/pgSQL function or when using cursors. Ensure that the code is expecting the correct number of result sets.
- Examine the transaction and session state: Use the following commands to check on the current state of backend sessions, especially if you suspect that transactions are not being completed as expected:
SELECT * FROM pg_stat_activity WHERE state != 'idle' AND query LIKE '%YOUR_QUERY_HERE%';- Check for any limit on cursors or result sets: Although PostgreSQL does not have a specific limit on the number of cursors, there might be application-level or environment-specific settings affecting this. Review any relevant configuration files or environment settings for such limits.
- Attempt to reproduce the error in a controlled environment: If possible, try to execute the same SQL code or transaction sequence in a development or test environment. This can help determine if the issue is consistent and aid in isolating the cause.
- If using a stored procedure or function that is expected to return result sets dynamically, verify its logic: Ensure that the procedure or function is correctly managing cursors and result sets. For procedures that are supposed to return multiple result sets, confirm that each
OPENcursor statement is matched with the correct logic to fetch and return these results.
Remember, these actions are meant for immediate investigation into the specific error code mentioned. Depending on what these investigations reveal, further actions might be required to resolve the issue.
Attached error:
PostgresDB 02001: No Additional Dynamic Result Sets Returned
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