修改oracle

seatunnel-datasource/seatunnel-datasource-plugins/datasource-jdbc-oracle/src/main/java/org/apache/seatunnel/datasource/plugin/oracle/jdbc/OracleDataSourceChannel.java

@@ -83,7 +83,7 @@ public class OracleDataSourceChannel implements DataSourceChannelExt {
         List<String> dbNames = new ArrayList<>();
         try (Connection connection = getConnection(requestParams);
                 PreparedStatement statement =
-                        connection.prepareStatement("SELECT table_name FROM user_tables");
+                        connection.prepareStatement("SELECT USERNAME FROM DBA_USERS");
                 ResultSet re = statement.executeQuery()) {
             // filter system databases
             while (re.next()) {