An earlier error in the transaction was not handled — subsequent queries fail with this error. ORM or pipeline framework continues executing after catching an exception without rolling back. Bulk insert pipeline ignores per-row errors and keeps the failed transaction open

Step 1: Always rollback the transaction after any error: `ROLLBACK;` or use `BEGIN ... EXCEPTION ... END` in PL/pgSQL.. Step 2: Use savepoints for partial rollback: `SAVEPOINT sp1; ... ROLLBACK TO sp1;`.. Step 3: Configure the ORM/driver to rollback on exception — e.g., SQLAlchemy's `Session.rollback()`.. Step 4: Add error handling in batch pipelines to isolate and retry individual failed rows.

High severityconfiguration

Power BI Refresh Error:
25P02

What does this error mean?

A command was sent inside a transaction that has already failed. PostgreSQL aborts all further commands until the transaction is rolled back.

Common causes

1An earlier error in the transaction was not handled — subsequent queries fail with this error
2ORM or pipeline framework continues executing after catching an exception without rolling back
3Bulk insert pipeline ignores per-row errors and keeps the failed transaction open

How to fix it

1Step 1: Always rollback the transaction after any error: `ROLLBACK;` or use `BEGIN ... EXCEPTION ... END` in PL/pgSQL.
2Step 2: Use savepoints for partial rollback: `SAVEPOINT sp1; ... ROLLBACK TO sp1;`.
3Step 3: Configure the ORM/driver to rollback on exception — e.g., SQLAlchemy's `Session.rollback()`.
4Step 4: Add error handling in batch pipelines to isolate and retry individual failed rows.

Frequently asked questions

How do I prevent 25P02 errors in automated pipelines?

Add retry logic with exponential backoff, validate data quality before loading, and monitor pipeline failures in MetricSign to catch this error early.

Official documentation: https://www.postgresql.org/docs/current/errcodes-appendix.html