{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/32075885","id":32075885,"diff_hunk":"@@ -87,4 +88,33 @@ object DateUtils {\n       ISO8601GMT.parse(s)\n     }\n   }\n+\n+  /**\n+   * Return a java.sql.Timestamp from number of 100ns since epoch\n+   */\n+  def toTimestamp(ns: Long): Timestamp = {\n+    // setNanos() will overwrite the millisecond part, so the milliseconds should be\n+    // cut off at seconds\n+    var seconds = ns / HUNDRED_NANOS_PER_SECOND\n+    var nanos = ns % HUNDRED_NANOS_PER_SECOND\n+    // setNanos() can not accept negative value\n+    if (nanos < 0) {\n+      nanos += HUNDRED_NANOS_PER_SECOND\n+      seconds -= 1\n+    }\n+    val t = new Timestamp(seconds * 1000)\n+    t.setNanos(nanos.toInt * 100)\n+    t\n+  }\n+\n+  /**\n+   * Return the number of 100ns since epoch from java.sql.Timestamp.\n+   */\n+  def fromTimestamp(t: Timestamp): Long = {\n+    if (t != null) {\n+      t.getTime() * 10000L + (t.getNanos().toLong / 100) % 10000L","path":"sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateUtils.scala","position":79,"original_position":79,"commit_id":"309d2e1a2b01e74ed1169d9d196943757be4d762","original_commit_id":"309d2e1a2b01e74ed1169d9d196943757be4d762","user":{"login":"rxin","id":323388,"avatar_url":"https://avatars.githubusercontent.com/u/323388?v=3","gravatar_id":"","url":"https://api.github.com/users/rxin","html_url":"https://github.com/rxin","followers_url":"https://api.github.com/users/rxin/followers","following_url":"https://api.github.com/users/rxin/following{/other_user}","gists_url":"https://api.github.com/users/rxin/gists{/gist_id}","starred_url":"https://api.github.com/users/rxin/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rxin/subscriptions","organizations_url":"https://api.github.com/users/rxin/orgs","repos_url":"https://api.github.com/users/rxin/repos","events_url":"https://api.github.com/users/rxin/events{/privacy}","received_events_url":"https://api.github.com/users/rxin/received_events","type":"User","site_admin":false},"body":"is this correct? I think getTime and getNanos might actually overlap in Timestamp","created_at":"2015-06-09T23:28:25Z","updated_at":"2015-06-09T23:28:25Z","html_url":"https://github.com/apache/spark/pull/6733#discussion_r32075885","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/6733","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/32075885"},"html":{"href":"https://github.com/apache/spark/pull/6733#discussion_r32075885"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/6733"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/6733","id":37309712,"html_url":"https://github.com/apache/spark/pull/6733","diff_url":"https://github.com/apache/spark/pull/6733.diff","patch_url":"https://github.com/apache/spark/pull/6733.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/6733","number":6733,"state":"open","locked":false,"title":"[SPARK-8189] [SQL] use Long for TimestampType in SQL","user":{"login":"davies","id":40902,"avatar_url":"https://avatars.githubusercontent.com/u/40902?v=3","gravatar_id":"","url":"https://api.github.com/users/davies","html_url":"https://github.com/davies","followers_url":"https://api.github.com/users/davies/followers","following_url":"https://api.github.com/users/davies/following{/other_user}","gists_url":"https://api.github.com/users/davies/gists{/gist_id}","starred_url":"https://api.github.com/users/davies/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/davies/subscriptions","organizations_url":"https://api.github.com/users/davies/orgs","repos_url":"https://api.github.com/users/davies/repos","events_url":"https://api.github.com/users/davies/events{/privacy}","received_events_url":"https://api.github.com/users/davies/received_events","type":"User","site_admin":false},"body":"This PR change to use Long as internal type for TimestampType for efficiency, which means it will the precision below 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