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https://issues.apache.org/jira/browse/TAJO-1176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14249599#comment-14249599
]
ASF GitHub Bot commented on TAJO-1176:
--------------------------------------
Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/273#discussion_r21957003
--- Diff:
tajo-catalog/tajo-catalog-server/src/main/java/org/apache/tajo/catalog/dictionary/SystemMetadataDictionary.java
---
@@ -0,0 +1,124 @@
+/**
+ * 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.tajo.catalog.dictionary;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.apache.tajo.catalog.exception.NoSuchTableException;
+import org.apache.tajo.catalog.proto.CatalogProtos;
+import org.apache.tajo.util.TUtil;
+
+public class SystemMetadataDictionary {
+
+ private static final String DATABASE_NAME = "SYSTEM";
--- End diff --
it should be also 'information_schema'.
> Implements queryable virtual tables for catalog information
> -----------------------------------------------------------
>
> Key: TAJO-1176
> URL: https://issues.apache.org/jira/browse/TAJO-1176
> Project: Tajo
> Issue Type: Improvement
> Reporter: Jihun Kang
> Assignee: Jihun Kang
> Priority: Trivial
> Fix For: 0.9.1
>
>
> I would like to propose queryable interfaces for catalog information. And
> these information may contain tables, columns, any other information on tajo
> catalog.
> Currently, TajoCli offers some meta commands for retrieving table list,
> however queryable virtual tables can provide a handy way to tajo users.
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