Chunwei is correct. If there are expressions that you would expect to constant-folded by that rule that aren’t, please log a bug.
> On Oct 25, 2021, at 7:10 PM, Chunwei Lei <chunwei.l...@gmail.com> wrote: > > Hi, Ian. > > ReduceExpressionsRule is always used to do constant folding. > > > Best, > Chunwei > > > On Tue, Oct 26, 2021 at 4:34 AM Ian Bertolacci > <ian.bertola...@workday.com.invalid> wrote: > >> Howdy, >> Does Calcite have any mechanism for applying constant folding to RexNodes >> in a query? >> >> We’ve been wondering why expressions like `1 + 2` don’t get folded into >> the constant `3`. >> We’re aware of RexSimplify, but it only does constant folding for Boolean >> expressions (i.e. logical and (some) comparison operations) >> And even with RexSimplify, we find that it still does not perform some >> (what we would consider trivial) optimizations on SEARCH expressions. >> For example `SEARCH(123:BIGINT, Sarg[123L:BIGINT]:BIGINT)` should get >> folded into `true`, but isn’t. >> (But that’s a separate conversation). >> >> So: is constant folding on all expressions something that already exists >> in Calcite? >> If so, what should we be looking at to configure Calcite to apply constant >> folding? >> >> Thanks! >> -Ian J. Bertolacci >>
