Statistics for SPARQL algebra features in use

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

Statitics are collected over 1151 queries. Using 6.74 statement patterns per query.

Type	Count	Queries
Statement patterns	7758	1148
Filter	805	587
Optional	80	50
Property path	131	94
Service	129	104
Union	140	92
Minus	2	2
Exists	186	127
Group	147	139
Order	157	156
Aggregate	410	139
- Average	8	4
- Count	316	117
- GroupConcat	46	20
- Max	4	2
- Min	4	2
- Sample	22	8
- Sum	10	3

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	15468	13.44
Constants	8677	7.54