为什么不能在JDBC中使用.dump命令？

Question

I am trying to merge two sqlite tables by dumping the contents of one into another. However, each time I attempt this, a syntax error is thrown, stating "[SQLITE_ERROR] SQL Error or missing database (near "sqlite3": syntax error)"

conn is the connection of the original database, which I send all sql commands. newConn is the connection of the database to be merged.

How can I fix this issue? Thank you in advance!

EDIT: I just wanted to make sure this doesn't get closed for being a duplicate. I used the sql code from here , but it's still causing problems.

        newConn = DriverManager.getConnection("jdbc:sqlite:" + path);

        String sqlMerge =  "sqlite3 ? .dump";
        conn.setAutoCommit(false);
        PreparedStatement pstmt1 = conn.prepareStatement(sqlMerge);
        pstmt1.setString(1, newConn.getCatalog());
        pstmt1.executeUpdate();
        conn.commit();

Answer 1

.dump is a feature of the SQLite command-line shell. It is not recognized by the SQLite dialect of the SQL language. You can either invoke the command-line shell from within Java or perform the equivalent operation using actual SQL commands via JDBC (to read the data) and Java file operations (to write the required dump file).