Databases by code size

I was curious how various databases compare in terms of their total source lines of code.  For each database I cloned the source repository or downloaded a source tarball.  I deleted code related to tests, and producing documentation (some projects have more test code than database code, so this can make a big difference).  Then I ran scc.  The numbers below are what scc labels as Code.  Since the methodology isn't exact, I only retained two significant figures.

The results are sorted from smallest to largest by SLOC count.  Let me know if you find mistakes or want another database included in the results.

• LMDB commit 332718f1 - 10k
• LevelDB 1.22 - 13k
• Tokyo Cabinet 1.4.48 - 40k
• GDBM 1.18.1 - 41k
• Kyoto Cabinet 1.2.77 - 61k 
• QDBM 1.8.78 - 81k
• Redis 5.0.5 - 140k
• Berkeley DB 5.3.21 - 180k
• RocksDB 6.2.2 - 190k
• SQLite 3.29.0 - 318k
• Neo4j 3.5.8 - 430k
• Cockroach DB 19.1.3 - 630k
• PostgreSQL 11.5 - 860k
• MariaDB 10.4.7 - 2,200k
• MySQL 8.0.17 - 3,700k
• MongoDB 4.0.12 - 4,100k