DEV Community
•
2026-08-03 03:37
Part 5: SQL Parsing: Turning Strings Into Commands
In Parts 1-4, we built a transactional key-value store. It has WAL for durability, memtables and SSTables for storage, compaction to control file growth, and transactions for atomic multi-key writes.
Now we move to the query layer where users can actually fire SQL queries like:
CREATE TABLE payments (amount INT, id STRING, status STRING, captured BOOL, PRIMARY KEY (id))
INSERT INTO payments VA...
