ddb/

Package expr implements DynamoDB's expression languages — condition, filter, and key-condition expressions (one shared grammar), update expressions, and projection expressions — with a real lexer and recursive-descent parsers.

Package item models DynamoDB items: the full AttributeValue type system (S, N, B, BOOL, NULL, M, L, SS, NS, BS) with DynamoDB's semantics — numbers are arbitrary-precision decimals compared numerically (never floats), sets reject duplicates, and item size follows the documented 400 KB accounting.

Package keyenc encodes DynamoDB key attribute values (S, N, B) into byte strings whose lexicographic order matches DynamoDB's key order — so bbolt cursors give range queries for free.

Package store is the DynamoDB storage engine: tables and items in bbolt, GSI/LSI entries maintained in the same transaction as every write, range queries via order-preserving key encodings (keyenc), single-node transactions with real atomicity, and TTL enforcement.