Statistics for SPARQL algebra features in use

Some basic statisics on SPARQL algebra features, as determined after parsing with RDF4j.

Statitics are collected over 189 queries. Using 10.5 statement patterns per query.

Type	Count	Queries
Statement patterns	1985	187
Filter	91	68
Optional	54	34
Property path	58	38
Service	75	63
Union	70	49
Minus	2	2
Exists	4	1
Group	52	49
Order	30	28
Aggregate	151	49
- Average	2	1
- Count	108	44
- GroupConcat	18	7
- Max	0	0
- Min	0	0
- Sample	21	6
- Sum	2	1

Note describe queries may have zero statement patterns.

Statistics for SPARQL variables and constants

This is distinct constants and variables. Two uses of the same IRI predicate in multiple triple paterns count as one constant.

	Count	Avg
Variables	3699	19.57
Constants	2045	10.82