- All Superinterfaces:
- All Known Subinterfaces:
- Enclosing class:
public static interface BuiltInMetadata.Distribution extends MetadataMetadata about how a relational expression is distributed.
If you are an operator consuming a relational expression, which subset of the rows are you seeing? You might be seeing all of them (BROADCAST or SINGLETON), only those whose key column values have a particular hash code (HASH) or only those whose column values have particular values or ranges of values (RANGE).
When a relational expression is partitioned, it is often partitioned among nodes, but it may be partitioned among threads running on the same node.
Nested Class Summary
Nested Classes Modifier and Type Interface Description