[
https://issues.apache.org/jira/browse/OMID-73?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16098268#comment-16098268
]
ASF GitHub Bot commented on OMID-73:
------------------------------------
Github user ebortnik commented on a diff in the pull request:
https://github.com/apache/incubator-omid/pull/12#discussion_r129018533
--- Diff:
transaction-client/src/main/java/org/apache/omid/transaction/AbstractTransaction.java
---
@@ -151,6 +205,20 @@ public void setCommitTimestamp(long commitTimestamp) {
}
/**
+ * Sets the visibility level for this transaction.
+ * @param visibilityLevel
+ * the {@link VisibilityLevel} to set
+ */
+ public void setVisibilityLevel(VisibilityLevel visibilityLevel) {
+ this.visibilityLevel = visibilityLevel;
+
+ if (this.visibilityLevel == VisibilityLevel.SNAPSHOT ||
--- End diff --
Comments please
> Add Checkpoints and visibility levels
> -------------------------------------
>
> Key: OMID-73
> URL: https://issues.apache.org/jira/browse/OMID-73
> Project: Apache Omid
> Issue Type: New Feature
> Reporter: Ohad Shacham
> Assignee: Ohad Shacham
>
> A checkpoint is a point in a transaction where every write occurs after the
> checkpoint may not be visible by the transaction.
> The visibility is defined by the following visibility levels:
> SNAPSHOT - returns the last written key by the transaction, in case one
> exists, otherwise, returns the key from the transaction snapshot.
> SNAPSHOT_EXCLUDE_CURRENT - returns the last written key by the transaction
> that was written before the last checkpoint, in case one exists, otherwise,
> returns the key from the transaction snapshot.
> SNAPSHOT_ALL - returns all the versions written by the transaction including
> the one in the transaction snapshot.
> This feature is needed for Phoenix both for upsert operations and for correct
> rollback of the secondary index on transaction abort.
> Explanations for this feature can be seen in [TEPHRA-96].
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
