Subject Ambiguous select statements
Author Nando Dessena
I noticed that IB happily executes an ambiguous query of the form:

select ...
from orders o
left join customers c1 on (o.customer_id1 =
left join customers c2 on (o.customer_id2 =
where somefield = 'somevalue'

Assuming "somefield" exists in both the customers and the orders table,
the query is ambiguous unless the reference in the where clause is

I have been told that other RDBMS' throw errors in this situation, while
IB simply executes the statement giving back seemingly unpredictable

I was wondering if this behaviour is somehow defined by the SQL
standard, or there are reasons for executing ambiguous statements
without displaying errors.
Otherwise, we could think about adding such a "feature".