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https://issues.apache.org/jira/browse/HIVE-21292?focusedWorklogId=210893&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-210893
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ASF GitHub Bot logged work on HIVE-21292:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 11/Mar/19 09:04
Start Date: 11/Mar/19 09:04
Worklog Time Spent: 10m
Work Description: miklosgergely commented on pull request #543:
HIVE-21292: Break up DDLTask 1 - extract Database related operations
URL: https://github.com/apache/hive/pull/543#discussion_r264137620
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/exec/ddl/database/DescDatabaseOperation.java
##########
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.hive.ql.exec.ddl.database;
+
+import java.io.DataOutputStream;
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.apache.hadoop.hive.conf.HiveConf;
+import org.apache.hadoop.hive.metastore.api.Database;
+import org.apache.hadoop.hive.metastore.api.PrincipalType;
+import org.apache.hadoop.hive.ql.ErrorMsg;
+import org.apache.hadoop.hive.ql.exec.ddl.DDLOperation;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.IOUtils;
+
+/**
+ * Operation process of describing a database.
+ */
+public class DescDatabaseOperation extends DDLOperation<DescDatabaseDesc> {
+ @Override
+ public int execute() throws HiveException {
+ DataOutputStream outStream = getOutputStream(ddlDesc.getResFile());
+ try {
+ Database database = db.getDatabase(ddlDesc.getDatabaseName());
+ if (database == null) {
+ throw new HiveException(ErrorMsg.DATABASE_NOT_EXISTS,
ddlDesc.getDatabaseName());
+ }
+
+ Map<String, String> params = null;
+ if (ddlDesc.isExt()) {
+ params = database.getParameters();
+ }
+
+ // If this is a q-test, let's order the params map (lexicographically) by
+ // key. This is to get consistent param ordering between Java7 and Java8.
+ if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_IN_TEST) && params
!= null) {
+ params = new TreeMap<String, String>(params);
+ }
+
+ String location = database.getLocationUri();
+ if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_IN_TEST)) {
+ location = "location/in/test";
Review comment:
HIVE-21420 opened
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Issue Time Tracking
-------------------
Worklog Id: (was: 210893)
Time Spent: 7h 20m (was: 7h 10m)
> Break up DDLTask - extract Database related operations
> ------------------------------------------------------
>
> Key: HIVE-21292
> URL: https://issues.apache.org/jira/browse/HIVE-21292
> Project: Hive
> Issue Type: Sub-task
> Components: Hive
> Affects Versions: 3.1.1
> Reporter: Miklos Gergely
> Assignee: Miklos Gergely
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-21292.01.patch, HIVE-21292.02.patch,
> HIVE-21292.03.patch, HIVE-21292.04.patch, HIVE-21292.05.patch,
> HIVE-21292.06.patch, HIVE-21292.07.patch, HIVE-21292.08.patch,
> HIVE-21292.09.patch, HIVE-21292.10.patch, HIVE-21292.11.patch,
> HIVE-21292.12.patch, HIVE-21292.13.patch, HIVE-21292.14.patch,
> HIVE-21292.15.patch, HIVE-21292.15.patch, HIVE-21292.16.patch,
> HIVE-21292.17.patch
>
> Time Spent: 7h 20m
> Remaining Estimate: 0h
>
> DDLTask is a huge class, more than 5000 lines long. The related DDLWork is
> also a huge class, which has a field for each DDL operation it supports. The
> goal is to refactor these in order to have everything cut into more
> handleable classes under the package org.apache.hadoop.hive.ql.exec.ddl:
> * have a separate class for each operation
> * have a package for each operation group (database ddl, table ddl, etc), so
> the amount of classes under a package is more manageable
> * make all the requests (DDLDesc subclasses) immutable
> * DDLTask should be agnostic to the actual operations
> * right now let's ignore the issue of having some operations handled by
> DDLTask which are not actual DDL operations (lock, unlock, desc...)
> In the interim time when there are two DDLTask and DDLWork classes in the
> code base the new ones in the new package are called DDLTask2 and DDLWork2
> thus avoiding the usage of fully qualified class names where both the old and
> the new classes are in use.
> Step #1: extract all the database related operations from the old DDLTask,
> and move them under the new package. Also create the new internal framework.
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