1CREATE TABLE data (
2    subject TEXT NOT NULL COLLATE NOCASE,
3    predicate TEXT NOT NULL COLLATE NOCASE,
4    object TEXT NOT NULL COLLATE NOCASE,
5    graph TEXT NOT NULL COLLATE NOCASE
6);
7
8-- index for subject-primary retrieval (index prefixes: s, sp)
9CREATE INDEX idx_spo ON data(subject, predicate, object);
10
11-- index for predicate-primary retrieval (i.e. property fetch)
12CREATE INDEX idx_pso ON data(predicate, subject, object);
13