Syntax

public ianywhere.ml.script.DownloadTableData

Remarks

Encapsulates table operations for MobiLink direct downloads. Use this interface to set the data operations that are downloaded to the client. To obtain DownloadTableData instances for the current synchronization, use the DownloadData interface. You can use the DownloadTableData.getUpsertPreparedStatement and getDeletePreparedStatement methods to obtain Java prepared statements for insert and update, and delete operations, respectively. The java.sql.PreparedStatement.executeUpdate method registers an operation for download.

Consult your Java SDK documentation for more information about java.sql.PreparedStatement.

See also

• DownloadData interface
• handle_DownloadData connection event
• Direct row handling

Members

All members of ianywhere.ml.script.DownloadTableData, including all inherited members.

• getDeletePreparedStatement method
• getUpsertPreparedStatement method
• getName method
• getMetaData method
• getLastDownloadTime method

Example

Assume you use a table called remoteOrders in MobiLink client databases.

CREATE TABLE remoteOrders (
    pk INT NOT NULL,
    col1 VARCHAR(200),
    PRIMARY KEY (pk)
);

The following example uses the DownloadData.getDownloadTableByName method to return a DownloadTableData instance representing the remoteOrders table.

// The method used for the handle_DownloadData event
public void handleDownload() throws SQLException {

    // Get the DownloadData for the current synchronization.
    DownloadData my_dd = _cc.getDownloadData();
 
    // Get the DownloadTableData for the remoteOrders table.
    DownloadTableData td = my_dd.getDownloadTableByName("remoteOrders");

    // User defined-methods to set download operations.
    setDownloadInserts(td);
    setDownloadDeletes(td); 

    // ... 
}

In this example, the setDownloadInserts method uses the DownloadTableData.getUpsertPreparedStatement to obtain a prepared statement for rows you want to insert or update. The PreparedStatement.setInt and PreparedStatement.setString methods set the column values you want to insert into the remote database.

void setDownloadInserts(DownloadTableData td) { 
    java.sql.PreparedStatement insert_ps = td.getUpsertPreparedStatement();

    // The following method calls are the same as the following SQL statement:
    // INSERT INTO remoteOrders(pk, col1) values(2300, "truck");
    insert_ps.setInt(1, 2300); 
    insert_ps.setString(2, "truck");

    int update_result = insert_ps.executeUpdate();
    if (update_result == 0) {
        // Insert was filtered because it was uploaded
        // in the same synchronization.
    } 
    else {
        // Insert was not filtered.
    }
}

The setDownloadDeletes method uses the DownloadTableData.getDeletePreparedStatement to obtain a prepared statement for rows you want to delete. The java.sql.PreparedStatement.setInt method sets the primary key values for rows you want to delete in the remote database and the java.sql.PreparedStatement.executeUpdate method registers the row values for download.

void setDownloadDeletes(DownloadTableData td) { 
    java.sql.PreparedStatement delete_ps = td.getDeletePreparedStatement();

    // The following method calls are the same as the following SQL statement:
    // DELETE FROM remoteOrders  where pk=2300;
    delete_ps.setInt(1, 2300); 
    delete_ps.executeUpdate();
}