Allow Linear
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 a linear search of the entire table, and this 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.
Copyright © Thunderstone Software Last updated: Thu Mar 11 16:13:32 EST 2010