The explicit structure that an expression is converted into before it's
rendered into SQL is referred to as an abstract query tree. If you see a
variable with C<aqt> in the name, or a comment before a code block saying
-C<# aqt>#, this is what's being described.
+C<# aqt>, this is what's being described.
=head2 SQL and Bind Values (query)
Becomes equivalent to a -and over an arrayref of hashtriples constructed
with the identifier as the key and each key/value pair of the original
-hashref as the vlue:
+hashref as the value:
# expr
{ id => { '<' => 4, '>' => 3 } }