Getting All The Tables in a Schema in a DB - Java Program

In this post we’ll see a Java program to get all the tables in a schema in a DB. Database used here is MySQL.

For getting tables you can use getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types) method provided by the DatabaseMetaData interface in the JDBC API. You can provide null as value for all the parameters, that way you don’t narrow the search and all the tables are returned. If you want to narrow your search to get specific tables then you can provide values for these parameters.

Java Code

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;

public class DBMetaData {

 public static void main(String[] args) {
   Connection connection = null;
   try {
    // Loading driver
    Class.forName("com.mysql.jdbc.Driver");

    // Creating connection
    connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/world", 
"root", "admin");
    // Getting DatabaseMetaData object
    DatabaseMetaData dbMetaData = connection.getMetaData();

    ResultSet rs = dbMetaData.getTables(null, null, null, null);       

    while (rs.next()){
     System.out.println(""Table name - "" + rs.getString(3));
    }

   } catch (ClassNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
   } catch (SQLException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
   }finally{
       if(connection != null){
          //closing connection 
          try {
            connection.close();
          } catch (SQLException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
          }
       } // if condition
   }// finally
 }
}

Points to note here are -

• Here connection is made to the “world” schema in the MySQL DB ( jdbc:mysql://localhost:3306/world) so program will list all the table names in the world schema.
• Returned resultset has table description rows where each row has following columns -

That’s why column index is 3 while getting result from ResultSet in the Java code as TABLE_NAME is at number 3.

That's all for this topic Getting All The Tables in a Schema in a DB - Java Program. If you have any doubt or any suggestions to make please drop a comment. Thanks!

Related Topics

1. Connection Pooling Using C3P0 in Java
2. Getting All The Schemas in a DB - Java Program
3. DataSource in Java-JDBC
4. CallableStatement Interface in Java-JDBC

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