Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/719#discussion_r38718817
--- Diff: tajo-docs/src/main/sphinx/storage_plugins/postgresql.rst ---
@@ -0,0 +1,29 @@
+*************************************
+PostgreSQL Storage Handler
+*************************************
+
+Overview
+========
+
+PostgreSQL storage handler available by default in Tajo. It enables users'
queries to access database objects in PostgreSQL. Tables in PostgreSQL will be
shown as tables in Tajo too. Most of the SQL queries used for PostgreSQL are
available in Tajo via this storage handles. Its main advantages is to allow
federated query processing among tables in stored HDFS and PostgreSQL.
--- End diff --
```is``` is missing in ```PostgreSQL storage handler available by default
in Tajo.```. Also, ```handles``` should be fixed as ```handlers```.
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