Hello all,
The documentation for partial indexes (section 3.2) lists "=, <, >, <=,
>=, <>, or IN" as operators that will trigger the use of an
index WHERE c IS NOT NULL.
It seems to me that LIKE should also be in that list, given that it
will also only match when c is not null.
I can force the query planner to say it will use the index by querying
as such:
WHERE col IS NOT NULL and col LIKE 'expr%'
But am I correct in thinking that SQLite is still scanning though the
table to evaluate expr%? If so, then am I also correct in thinking that
if I want LIKE to use an index it has to be a full index?
Regards,
Mark
--
Mark Lawrence
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