Question

We’re developing a Doctrine backed website using YAML to define our schema. Our schema changes regularly (including fk relations) so we need to do a lot of:

    Doctrine::generateModelsFromYaml(APPPATH . 'models/yaml', APPPATH . 'models', array('generateTableClasses' => true));
    Doctrine::dropDatabases();
    Doctrine::createDatabases();
    Doctrine::createTablesFromModels();

We would like to keep existing data and store it back in the re-created database. So I copy the data into a temporary database before the main db is dropped.

How do I get the data from the “old-scheme DB copy” to the “new-scheme DB”? (the new scheme only contains NEW columns, NO COLUMNS ARE REMOVED)

NOTE:

This obviously doesn’t work because the column count doesn’t match.

SELECT * FROM copy.Table INTO newscheme.Table

This obviously does work, however this is consuming too much time to write for every table:

SELECT old.col, old.col2, old.col3,'somenewdefaultvalue' FROM copy.Table as old INTO newscheme.Table

Answer 1

Have you looked into Migrations? They allow you to alter your database schema in programmatical way. WIthout losing data (unless you remove colums, of course)