{"action":"created","issue":{"url":"https://api.github.com/repos/apache/spark/issues/7509","labels_url":"https://api.github.com/repos/apache/spark/issues/7509/labels{/name}","comments_url":"https://api.github.com/repos/apache/spark/issues/7509/comments","events_url":"https://api.github.com/repos/apache/spark/issues/7509/events","html_url":"https://github.com/apache/spark/pull/7509","id":95897820,"number":7509,"title":"[SPARK-9178][SQL] Add an empty string constant to UTF8String","user":{"login":"tarekauel","id":5320817,"avatar_url":"https://avatars.githubusercontent.com/u/5320817?v=3","gravatar_id":"","url":"https://api.github.com/users/tarekauel","html_url":"https://github.com/tarekauel","followers_url":"https://api.github.com/users/tarekauel/followers","following_url":"https://api.github.com/users/tarekauel/following{/other_user}","gists_url":"https://api.github.com/users/tarekauel/gists{/gist_id}","starred_url":"https://api.github.com/users/tarekauel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tarekauel/subscriptions","organizations_url":"https://api.github.com/users/tarekauel/orgs","repos_url":"https://api.github.com/users/tarekauel/repos","events_url":"https://api.github.com/users/tarekauel/events{/privacy}","received_events_url":"https://api.github.com/users/tarekauel/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":29,"created_at":"2015-07-19T08:26:21Z","updated_at":"2015-07-20T16:39:00Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/7509","html_url":"https://github.com/apache/spark/pull/7509","diff_url":"https://github.com/apache/spark/pull/7509.diff","patch_url":"https://github.com/apache/spark/pull/7509.patch"},"body":"Jira: https://issues.apache.org/jira/browse/SPARK-9178\r\n\r\nIn order to avoid calls of `UTF8String.fromString(\"\")` this pr adds an `EMPTY_STRING` constant to `UTF8String`. An `UTF8String` is immutable, so we can use a constant, isn't it?\r\n\r\nI searched for current usage of `UTF8String.fromString(\"\")` with \r\n`grep -R  \"UTF8String.fromString(\\\"\\\")\" .` "},"comment":{"url":"https://api.github.com/repos/apache/spark/issues/comments/122943685","html_url":"https://github.com/apache/spark/pull/7509#issuecomment-122943685","issue_url":"https://api.github.com/repos/apache/spark/issues/7509","id":122943685,"user":{"login":"SparkQA","id":8108735,"avatar_url":"https://avatars.githubusercontent.com/u/8108735?v=3","gravatar_id":"","url":"https://api.github.com/users/SparkQA","html_url":"https://github.com/SparkQA","followers_url":"https://api.github.com/users/SparkQA/followers","following_url":"https://api.github.com/users/SparkQA/following{/other_user}","gists_url":"https://api.github.com/users/SparkQA/gists{/gist_id}","starred_url":"https://api.github.com/users/SparkQA/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/SparkQA/subscriptions","organizations_url":"https://api.github.com/users/SparkQA/orgs","repos_url":"https://api.github.com/users/SparkQA/repos","events_url":"https://api.github.com/users/SparkQA/events{/privacy}","received_events_url":"https://api.github.com/users/SparkQA/received_events","type":"User","site_admin":false},"created_at":"2015-07-20T16:38:59Z","updated_at":"2015-07-20T16:38:59Z","body":"  [Test build #1121 has started](https://amplab.cs.berkeley.edu/jenkins/job/NewSparkPullRequestBuilder/1121/consoleFull) for   PR 7509 at commit [`3f5fbf5`](https://github.com/apache/spark/commit/3f5fbf5a1d92e5cc6621bf65c5c140efec2aacc3)."}}