Magic Tables, Constraints and Columns

It's been frantic - as the low-level engine edges ever closer to completion my attention has been squarely focused on that mainstay of RDBMS systems known affectionately as tables!

As it happens the table implementation has not proved too difficult to implement thus far and currently support is in-place for the following;

• Overflow table definition pages


• Column constraints


• Data page-splitting

The row block writer and row block reader objects are complete and the internal row organisation is finished!

This work needs to be synchronised with ongoing work on the Table Index Manager to ensure we can add/update/delete rows along with appropriate index trees - yippee!

An old column object has been extended to provide serialisation support to both RowReader and RowWriter classes - as one might have expected - to centralise persistence logic and column capabilities. Hence when I get around to supporting User Defined Types or whatever the rest of the code should simply carry on working - famous last words I know...