Achieve PostgreSQL Partition Pruning on Non-Partitioned Columns

How to Achieve Pruning When Querying by Non-Partitioned Columns in PostgreSQL

I demonstrate how to achieve partition pruning in PostgreSQL even when filtering by non-partition key columns. By leveraging strong data correlations, such as sequential session IDs aligned with timestamps, you can guide the optimizer to eliminate irrelevant partitions. This approach overcomes the limitations of local indexes and improves query performance without requiring global indexes.

"The database optimizer is truly a marvelous piece of engineering. It takes a query and figures out on its own how to execute it without looking at the actual data."