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https://issues.apache.org/jira/browse/ARROW-1927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16297699#comment-16297699
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ASF GitHub Bot commented on ARROW-1927:
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robertnishihara commented on a change in pull request #1427: ARROW-1927:
[Plasma] Add delete function
URL: https://github.com/apache/arrow/pull/1427#discussion_r157910600
##########
File path: cpp/src/plasma/client.cc
##########
@@ -501,9 +501,20 @@ Status PlasmaClient::Abort(const ObjectID& object_id) {
}
Status PlasmaClient::Delete(const ObjectID& object_id) {
- // TODO(rkn): In the future, we can use this method to give hints to the
- // eviction policy about when an object will no longer be needed.
- return Status::NotImplemented("PlasmaClient::Delete is not implemented.");
+ RETURN_NOT_OK(FlushReleaseHistory());
+ // If the object is in used, client can't send the remove message.
+ if (objects_in_use_.count(object_id) > 0) {
+ return Status::UnknownError("PlasmaClient::Object is in used.");
+ } else {
+ // If we don't already have a reference to the object, we can try to
remove the object
+ RETURN_NOT_OK(SendDeleteRequest(store_conn_, object_id));
+ std::vector<uint8_t> buffer;
+ RETURN_NOT_OK(PlasmaReceive(store_conn_, MessageType_PlasmaDeleteReply,
&buffer));
Review comment:
What do you think about not having the plasma store reply to the client? The
client could just continue on. If it really wants to know whether the object
was deleted or not, it can call `Contains` to check.
Are there use cases where you really want to know if the object was deleted
or not?
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> [Plasma] Implement delete function
> ----------------------------------
>
> Key: ARROW-1927
> URL: https://issues.apache.org/jira/browse/ARROW-1927
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Plasma (C++), Python
> Reporter: Philipp Moritz
> Labels: pull-request-available
>
> The function should check if the reference count of the object is zero and if
> yes, delete it from the store. If no, it should raise an exception or return
> a status value.
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