#39 Exception when DB table struct differs from model ***218

[David Davidson]

Currently, when reading values from a table, a
ClassCastException may occur if the modeled type of a
column differs from the actual type in the database.

We could fix it in two ways:
1) Remain 'strict' and throw a better exception (and
possibly validate the structures when the application
loads)
2) Be more forgiving regarding mismatches ( e.g. allow
reading numbers from textual fields as long as the
content is a representation of a number).
Databases/JDBC may support this (I am not sure about
it).

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