protected void closeDbConnection() throws IOException {
		if (connection != null) {
			try {
				connection.close();
			} catch (SQLException se) {
				LOG.warn("JDBC connection could not be closed: " + se.getMessage());
			} finally {
				connection = null;
			}
		}
	}
OutputFormat to write Rows into a JDBC database.

@see Row
@see DriverManager
rdb/rdb-sink/src/main/java/com/dtstack/flink/sql/sink/rdb/format/AbstractJDBCOutputFormat.java