SQLite implementation of query support for DB based index #31

All 547 tests pass, 4 skipped in 8m 5s

551 tests +1 547 ✔️ +1 8m 5s ⏱️ -30s
    1 suites ±0     4 💤 ±0
    1 files ±0     0 ❌ ±0

Results for commit d898604. ± Comparison against earlier commit 81e3534.