Github user tdas commented on a diff in the pull request: https://github.com/apache/spark/pull/18107#discussion_r118465966 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/StateStore.scala --- @@ -47,31 +60,25 @@ trait StateStore { /** Version of the data in this store before committing updates. */ def version: Long - /** Get the current value of a key. */ - def get(key: UnsafeRow): Option[UnsafeRow] - /** - * Return an iterator of key-value pairs that satisfy a certain condition. - * Note that the iterator must be fail-safe towards modification to the store, that is, - * it must be based on the snapshot of store the time of this call, and any change made to the - * store while iterating through iterator should not cause the iterator to fail or have - * any affect on the values in the iterator. + * Get the current value of a key. */ - def filter(condition: (UnsafeRow, UnsafeRow) => Boolean): Iterator[(UnsafeRow, UnsafeRow)] - - /** Put a new value for a key. */ - def put(key: UnsafeRow, value: UnsafeRow): Unit + def get(key: UnsafeRow): UnsafeRow /** - * Remove keys that match the following condition. + * Put a new value for a key. + * @return Previous value of the key or null. */ - def remove(condition: UnsafeRow => Boolean): Unit + def put(key: UnsafeRow, value: UnsafeRow): Unit /** * Remove a single key. + * @return Previous value of the removed key or null. */ def remove(key: UnsafeRow): Unit + def getRange(start: Option[UnsafeRow], end: Option[UnsafeRow]): Iterator[UnsafeRowTuple] --- End diff -- add docs
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