name:: Query against boolean columns
query::
SELECT * FROM amanda.nucand WHERE atmonusubset='True'
description:: Regrettably, ADQL has no notion of boolean values.  Some tables
this service exposes to TAP -- e.g., :taptable:`amanda.nucand`, have
boolean columns natively, and we dare give boolean as a datatype for
those in the table metadata.  To query those, you cannot say ``WHERE boolCol`` 
or somesuch as in SQL dialects having native booleans.  You must compare
against something, and at least on this server, it has to be ``'True'`` or
``'False'`` as string literals.
..