5. Python for Pipelines (pandas to files/DB)
5.3 Idempotent Runs Idea
By Ravindra Bagale · Last updated:
Why. Re-running a job twice should not double the warehouse rows.
What. Idempotent ≈ same input re-run gives the same safe result (overwrite partition, merge on keys, truncate+load carefully).
How. Prefer “replace yesterday’s partition” over blind append.