Fixed deletion of check, nnull and unique constraints

AILab-FOI / akdb

An experimental relational DBMS developed by students @ Faculty of Organization and Informatics, University of Zagreb

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Fixed deletion of check, nnull and unique constraints #273

Closed bpilosta closed 3 years ago

bpilosta commented 3 years ago

Provided different implementation of constraints deletion. Deleting any of the constraints should now not crash the application and deleting multiple constraints should work. Added deletion test to check constraint tests.