Rules and Guidelines for Sessions with Multiple Partitions
Rules and Guidelines for Sessions with Multiple Partitions
Use the following rules and guidelines when you configure the Integration Service to push sessions with multiple partitions to a database.
The Integration Service can push a session with multiple partitions to the database in the following situations:
If the session uses pass-through partitioning at the partition point at the Source Qualifier transformation and all subsequent partition points, the Integration Service can push the transformation logic to the database using source-side, target-side, or full pushdown optimization.
If the session uses key range partitioning at the Source Qualifier transformation and contains hash auto-keys or pass-through partitions in downstream partition points, the Integration Service can push the transformation logic to the database using source-side or full pushdown optimization.
If pushdown optimization merges data from multiple partitions of a transformation into the first partition and the Integration Service processes the transformation logic for a downstream transformation, the Integration Service does not redistribute the rows among the partitions in the downstream transformation. It continues to pass the rows to the first partition and pass empty data in the other partitions.
