Question

I’m writing some data to a database file using the SQLite JDBC driver 3.7.2 from within java . When I try it to open the database file on the command line, I get an error message saying:

“Unable to open database test.db: file is encrypted or is not a database”

I made a minimal example that results in this behavior:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;

public class PlaygroundSQLite {
    public static void insertIntoDB(String dbFilename, String tablename){
        try {
            Class.forName("org.sqlite.JDBC");
            Connection conn = DriverManager.getConnection("jdbc:sqlite:"+dbFilename);
            PreparedStatement prep = conn.prepareStatement("insert into " + tablename + "( id, text) values (?, ?);");

            prep.setString(1, "1FD22A38");
            prep.setString(2, "This is a simple test");

            prep.addBatch();

            conn.setAutoCommit(false);
            prep.executeBatch();
            conn.setAutoCommit(true);

            conn.close();

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static void createDB(String dbFilename, String tablename){
        try {
            Class.forName("org.sqlite.JDBC");
            Connection conn = DriverManager.getConnection("jdbc:sqlite:" + dbFilename);
            Statement stat = conn.createStatement();
            stat.executeUpdate("drop table if exists test;");
            stat.executeUpdate("create table " + tablename + " (key INTEGER PRIMARY KEY, id TEXT , text TEXT);");
            conn.close();
            stat.close();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String dbFilename = "test.db";
        String tablename = "test";

        PlaygroundSQLite.createDB(dbFilename, tablename);
        PlaygroundSQLite.insertIntoDB(dbFilename, tablename);
    }
}

Answer 1

The problem here was a version mismatch between the Java SQLite JDBC Driver (version 3.7.2) and the SQLite version installed on my machine (version 2.8.17). Using a sqlite3 binary solved the problem.