Syntax: select Yes or No button
Off by default.
If on, an all-linear query-one without any indexable ``anchor''
words-is allowed. A query like ``/money #million
'' where
all the terms use unindexable pattern matchers (REX, NPM or XPM)
is an example. Such a query requires that the entire table be
linearly searched, which can be very slow for a table of
significant size.
If allinear
is off, all queries must have at least one term
that can be resolved with the Metamorph index, and a Metamorph
index must exist on the field. Under such circumstances, other
unindexable terms in the query can generally be resolved quickly,
if the ``anchor'' term limits the linear search to a tiny fraction
of the table. The error message ``Query would require linear
search'' may be generated by linear queries if this is off.