Reading all the objects in a bucket can be time-consuming and expensive. An alternative solution is to filter the object store using one or both of the following methods:
- Path Filtering
- A path is a series of values that constitute a multi-level key (siteno, year, month, day) which identifies one or more objects within an object store.
- Path filtering lets you pre-select which objects in the object store you want to bring back to the database, by providing specified values for different levels in a path key (such as "WHERE $path.$siteno = 09380000")
- Column Filtering
- Parquet supports the ability to apply filtering at the column level while the data is in the object store.
- This can be as effective as path filtering in reducing the volume of data returned.