Bump checkstyle from 8.14 to 8.29

.gitignore

@@ -21,3 +21,10 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+# IntelliJ IDEA Files
+.idea
+*.iml
+
+# Maven Files
+target

README.md

@@ -1 +1,113 @@
-# flink-jdbc-driver
+# Flink JDBC Driver
+
+Flink JDBC driver is a Java library for accessing and manipulating [Apache Flink](https://flink.apache.org/) clusters by connecting to a [Flink SQL gateway](https://github.com/ververica/flink-sql-gateway) as the JDBC server.
+
+This project is at an early stage. Feel free to file an issue if you meet any problems or have any suggestions.
+
+# Usage
+
+Before using Flink JDBC driver, you need to start a [Flink SQL gateway](https://github.com/ververica/flink-sql-gateway) as the JDBC server and binds it with your Flink cluster. We now assume that you have a gateway started and connected to a running Flink cluster.
+
+## Use with a JDBC Tool
+### Use with Beeline
+
+Beeline is the command line tool for accessing [Apache Hive](https://hive.apache.org/), but it also supports general JDBC drivers. To install Hive and beeline, see [Hive documentation](https://cwiki.apache.org/confluence/display/Hive/GettingStarted#GettingStarted-InstallationandConfiguration).
+
+1. Download flink-jdbc-driver-(VERSION).jar from the [download page](https://github.com/ververica/flink-jdbc-driver/releases) and add it to `$HIVE_HOME/lib`.
+2. Run beeline and connect to a Flink SQL gateway. You can specify the planner (`blink` or `old`) in the query parameter of the url. As Flink SQL gateway currently ignores user names and passwords, just leave them empty.
+ ```
+ beeline> !connect jdbc:flink://localhost:8083?planner=blink
+ ```
+3. Execute any statement you want.
+
+**Sample Commands**
+```
+Beeline version 2.2.0 by Apache Hive
+beeline> !connect jdbc:flink://localhost:8083?planner=blink
+Connecting to jdbc:flink://localhost:8083?planner=blink
+Enter username for jdbc:flink://localhost:8083?planner=blink: 
+Enter password for jdbc:flink://localhost:8083?planner=blink: 
+Connected to: Apache Flink (version 1.10.0)
+Driver: Flink Driver (version 0.1)
+Transaction isolation: TRANSACTION_REPEATABLE_READ
+0: jdbc:flink://localhost:8083> CREATE TABLE T(
+. . . . . . . . . . . . . . . > a INT,
+. . . . . . . . . . . . . . . > b VARCHAR(10)
+. . . . . . . . . . . . . . . > ) WITH (
+. . . . . . . . . . . . . . . > 'connector.type' = 'filesystem',
+. . . . . . . . . . . . . . . > 'connector.path' = 'file:///tmp/T.csv',
+. . . . . . . . . . . . . . . > 'format.type' = 'csv',
+. . . . . . . . . . . . . . . > 'format.derive-schema' = 'true'
+. . . . . . . . . . . . . . . > );
+No rows affected (0.158 seconds)
+0: jdbc:flink://localhost:8083> INSERT INTO T VALUES (1, 'Hi'), (2, 'Hello');
+No rows affected (4.747 seconds)
+0: jdbc:flink://localhost:8083> SELECT * FROM T;
++----+--------+--+
+| a | b |
++----+--------+--+
+| 1 | Hi |
+| 2 | Hello |
++----+--------+--+
+2 rows selected (0.994 seconds)
+0: jdbc:flink://localhost:8083> 
+```
+
+### Use with Tableau
+[Tableau](https://www.tableau.com/) is an interactive data visualization software. It supports *Other Database (JDBC)* connection from version 2018.3. You'll need Tableau with version >= 2018.3 to use Flink JDBC driver. For general usage of *Other Database (JDBC)* in Tableau, see [Tableau documentation](https://help.tableau.com/current/pro/desktop/en-us/examples_otherdatabases_jdbc.htm).
+
+1. Download flink-jdbc-driver-(VERSION).jar from the [download page](https://github.com/ververica/flink-jdbc-driver/releases) and add it to Tableau driver path.
+ * Windows: `C:\Program Files\Tableau\Drivers`
+ * Mac: `~/Library/Tableau/Drivers`
+ * Linux: `/opt/tableau/tableau_driver/jdbc`
+2. Select *Other Database (JDBC)* under *Connect* and fill in the url of Flink SQL gateway. You can specify the planner (`blink` or `old`) in the query parameter of the url. Select *SQL92* dialect and leave user name and password empty.
+3. Hit *Login* button and use Tableau as usual.
+
+### Use with other JDBC Tools
+Flink JDBC driver is a library for accessing Flink clusters through the JDBC API. Any tool supporting JDBC API can be used with Flink JDBC driver and [Flink SQL gateway](https://github.com/ververica/flink-sql-gateway). See the documentation of your desired tool on how to use a JDBC driver.
+
+## Use with Java
+
+Flink JDBC driver is a library for accessing Flink clusters through the JDBC API. For the general usage of JDBC in Java, see [JDBC tutorial](https://docs.oracle.com/javase/tutorial/jdbc/index.html) or [Oracle JDBC documentation](https://www.oracle.com/technetwork/java/javase/tech/index-jsp-136101.html).
+
+1. Download flink-jdbc-driver-(VERSION).jar from the [download page](https://github.com/ververica/flink-jdbc-driver/releases) and add it to your classpath.
+2. Connect to a Flink SQL gateway in your Java code. You can specify the planner (`blink` or `old`) in the query parameter of the url.
+3. Execute any statement you want.
+
+**Sample.java**
+```java
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+
+public class Sample {
+ public static void main(String[] args) throws Exception {
+ Connection connection = DriverManager.getConnection("jdbc:flink://localhost:8083?planner=blink");
+ Statement statement = connection.createStatement();
+
+ statement.executeUpdate("CREATE TABLE T(\n" +
+ " a INT,\n" +
+ " b VARCHAR(10)\n" +
+ ") WITH (\n" +
+ " 'connector.type' = 'filesystem',\n" +
+ " 'connector.path' = 'file:///tmp/T.csv',\n" +
+ " 'format.type' = 'csv',\n" +
+ " 'format.derive-schema' = 'true'\n" +
+ ")");
+ ResultSet rs = statement.executeQuery("SELECT * FROM T");
+ while (rs.next()) {
+ System.out.println(rs.getInt(1) + ", " + rs.getString(2));
+ }
+
+ statement.close();
+ connection.close();
+ }
+}
+```
+
+**Output**
+```
+1, Hi
+2, Hello
+```