{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/56755769","id":56755769,"diff_hunk":"@@ -0,0 +1,104 @@\n+/*\n+ * Licensed to the Apache Software Foundation (ASF) under one or more\n+ * contributor license agreements.  See the NOTICE file distributed with\n+ * this work for additional information regarding copyright ownership.\n+ * The ASF licenses this file to You under the Apache License, Version 2.0\n+ * (the \"License\"); you may not use this file except in compliance with\n+ * the License.  You may obtain a copy of the License at\n+ *\n+ *    http://www.apache.org/licenses/LICENSE-2.0\n+ *\n+ * Unless required by applicable law or agreed to in writing, software\n+ * distributed under the License is distributed on an \"AS IS\" BASIS,\n+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n+ * See the License for the specific language governing permissions and\n+ * limitations under the License.\n+ */\n+\n+package org.apache.spark.sql.hive\n+\n+import org.apache.spark.sql.catalyst.TableIdentifier\n+import org.apache.spark.sql.catalyst.catalog.SessionCatalog\n+import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, SubqueryAlias}\n+import org.apache.spark.sql.catalyst.rules.Rule\n+import org.apache.spark.sql.execution.datasources.BucketSpec\n+import org.apache.spark.sql.hive.client.HiveClient\n+import org.apache.spark.sql.internal.SQLConf\n+import org.apache.spark.sql.types.StructType\n+\n+\n+class HiveSessionCatalog(\n+    externalCatalog: HiveCatalog,\n+    client: HiveClient,\n+    context: HiveContext,\n+    conf: SQLConf)\n+  extends SessionCatalog(externalCatalog, conf) {\n+\n+  override def setCurrentDatabase(db: String): Unit = {\n+    super.setCurrentDatabase(db)\n+    client.setCurrentDatabase(db)\n+  }\n+\n+  override def lookupRelation(name: TableIdentifier, alias: Option[String]): LogicalPlan = {","path":"sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveSessionCatalog.scala","position":42,"original_position":42,"commit_id":"4b37d7aae3bdaaf61dba18d23dae2c7da9938a5f","original_commit_id":"f089e2bebacc000ac65a0a14b1124c0c5a1e860c","user":{"login":"yhuai","id":2072857,"avatar_url":"https://avatars.githubusercontent.com/u/2072857?v=3","gravatar_id":"","url":"https://api.github.com/users/yhuai","html_url":"https://github.com/yhuai","followers_url":"https://api.github.com/users/yhuai/followers","following_url":"https://api.github.com/users/yhuai/following{/other_user}","gists_url":"https://api.github.com/users/yhuai/gists{/gist_id}","starred_url":"https://api.github.com/users/yhuai/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yhuai/subscriptions","organizations_url":"https://api.github.com/users/yhuai/orgs","repos_url":"https://api.github.com/users/yhuai/repos","events_url":"https://api.github.com/users/yhuai/events{/privacy}","received_events_url":"https://api.github.com/users/yhuai/received_events","type":"User","site_admin":false},"body":"Eventually, we should not need to have a `HiveSessionCatalog`. For now, the main reason that we have it is because  `HiveMetastoreCatalog` is tightly coupled with both Hive and Spark SQL (e.g. the metadata cache's load method reads metadata from Hive metastore and then creates LogicalPlans directly).\r\n\r\n(@andrewor14 correct me if I am missing anything)","created_at":"2016-03-19T21:59:47Z","updated_at":"2016-03-19T21:59:47Z","html_url":"https://github.com/apache/spark/pull/11836#discussion_r56755769","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/11836","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/56755769"},"html":{"href":"https://github.com/apache/spark/pull/11836#discussion_r56755769"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/11836"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/11836","id":63447603,"html_url":"https://github.com/apache/spark/pull/11836","diff_url":"https://github.com/apache/spark/pull/11836.diff","patch_url":"https://github.com/apache/spark/pull/11836.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/11836","number":11836,"state":"open","locked":false,"title":"[SPARK-14014] [SQL] Replace existing catalog with SessionCatalog","user":{"login":"andrewor14","id":2133137,"avatar_url":"https://avatars.githubusercontent.com/u/2133137?v=3","gravatar_id":"","url":"https://api.github.com/users/andrewor14","html_url":"https://github.com/andrewor14","followers_url":"https://api.github.com/users/andrewor14/followers","following_url":"https://api.github.com/users/andrewor14/following{/other_user}","gists_url":"https://api.github.com/users/andrewor14/gists{/gist_id}","starred_url":"https://api.github.com/users/andrewor14/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/andrewor14/subscriptions","organizations_url":"https://api.github.com/users/andrewor14/orgs","repos_url":"https://api.github.com/users/andrewor14/repos","events_url":"https://api.github.com/users/andrewor14/events{/privacy}","received_events_url":"https://api.github.com/users/andrewor14/received_events","type":"User","site_admin":false},"body":"## What changes were proposed in this pull request?\r\n\r\n`SessionCatalog`, introduced in #11750, is a catalog that keeps track of temporary functions and tables, and delegates metastore operations to `ExternalCatalog`. This functionality overlaps a lot with the existing `analysis.Catalog`.\r\n\r\nAs of this commit, `SessionCatalog` and `ExternalCatalog` will no longer be dead code. There are still things that need to be done after this patch, namely:\r\n- SPARK-14013: Properly implement temporary functions in `SessionCatalog`\r\n- SPARK-13879: Decide which DDL/DML commands to support natively in Spark\r\n- SPARK-?????: Implement the ones we do want to support through `SessionCatalog`.\r\n- SPARK-?????: Merge SQL/HiveContext\r\n\r\n## How was this patch tested?\r\n\r\nThis is largely a refactoring task so there are no new tests introduced. The particularly relevant tests are `SessionCatalogSuite` and `ExternalCatalogSuite`.\r\n","created_at":"2016-03-18T23:03:46Z","updated_at":"2016-03-19T21:59:47Z","closed_at":null,"merged_at":null,"merge_commit_sha":"d17bb2f9adbaa46834b599b2e57d27f0b44c5001","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/apache/spark/pulls/11836/commits","review_comments_url":"https://api.github.com/repos/apache/spark/pulls/11836/comments","review_comment_url":"https://api.github.com/repos/apache/spark/pulls/comments{/number}","comments_url":"https://api.github.com/repos/apache/spark/issues/11836/comments","statuses_url":"https://api.github.com/repos/apache/spark/statuses/4b37d7aae3bdaaf61dba18d23dae2c7da9938a5f","head":{"label":"andrewor14:use-session-catalog","ref":"use-session-catalog","sha":"4b37d7aae3bdaaf61dba18d23dae2c7da9938a5f","user":{"login":"andrewor14","id":2133137,"avatar_url":"https://avatars.githubusercontent.com/u/2133137?v=3","gravatar_id":"","url":"https://api.github.com/users/andrewor14","html_url":"https://github.com/andrewor14","followers_url":"https://api.github.com/users/andrewor14/followers","following_url":"https://api.github.com/users/andrewor14/following{/other_user}","gists_url":"https://api.github.com/users/andrewor14/gists{/gist_id}","starred_url":"https://api.github.com/users/andrewor14/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/andrewor14/subscriptions","organizations_url":"https://api.github.com/users/andrewor14/orgs","repos_url":"https://api.github.com/users/andrewor14/repos","events_url":"https://api.github.com/users/andrewor14/events{/privacy}","received_events_url":"https://api.github.com/users/andrewor14/received_events","type":"User","site_admin":false},"repo":{"id":17231517,"name":"spark","full_name":"andrewor14/spark","owner":{"login":"andrewor14","id":2133137,"avatar_url":"https://avatars.githubusercontent.com/u/2133137?v=3","gravatar_id":"","url":"https://api.github.com/users/andrewor14","html_url":"https://github.com/andrewor14","followers_url":"https://api.github.com/users/andrewor14/followers","following_url":"https://api.github.com/users/andrewor14/following{/other_user}","gists_url":"https://api.github.com/users/andrewor14/gists{/gist_id}","starred_url":"https://api.github.com/users/andrewor14/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/andrewor14/subscriptions","organizations_url":"https://api.github.com/users/andrewor14/orgs","repos_url":"https://api.github.com/users/andrewor14/repos","events_url":"https://api.github.com/users/andrewor14/events{/privacy}","received_events_url":"https://api.github.com/users/andrewor14/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/andrewor14/spark","description":"Mirror 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