Give a better error message on DROP COLUMN when attempting to drop
the last column of a table. FossilOrigin-Name: 5e1f362bc3e53c60f9e6f771346d10c6e6a6cb3ff1eec5608101f9c5d6d2a5a4
D
drh committed
239c84fc620d76e98547a8387e1aaa6d7d995b79
Parent: c90fa01