afs commented on issue #3751:
URL: https://github.com/apache/jena/issues/3751#issuecomment-3898841378
@Aklakan
Is there any reason not to put try-catch-QueryIterFailed around the whole of
`optimizeExecute` bodies?
This
```java
if ( ! input.hasNext() )
return input ;
```
isn't necessary but, generally, the pattern of having a quick check to make
sure there is something to do is used.
---
A short test case is:
```sparql
PREFIX : <http://example/>
SELECT *
WHERE {
?x :property* ?y .
?y :q1 123 .
?y :q2 456 .
}
```
even on an empty database. The key is a non-matching, non-mergable pattern
then 2+ triples patterns - even `{ FILTER(false) }` will do.
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