Query syntax quick map

Surface	Primary use	Parameter style	Bounded-read rule
CQL native protocol	Cassandra-compatible keyspace/table access, prepared statements, CQL batches, MTS extensions where enabled.	Native driver markers, usually `?` in prepared statements.	Complete primary key, admitted clustering/range read, or queryable access path.
MTS SQL mode	SQL-shaped OLTP statements over the same native protocol endpoint.	`$1`, `$2`, ... in prepared SQL text.	Same bounded planning contract; SQL syntax does not imply scan permission.
REST API	HTTP adapter over public MTS execution, prepared, data helper, explain/advice, catalog, routing, cluster, import/export surfaces.	JSON typed values and request bodies.	Statement and helper requests must still be admitted by the MTS planner.
DynamoDB-compatible HTTP	AWS JSON protocol compatibility for item, query, scan, batch, transaction, table admin, stream, backup/import/export operations.	DynamoDB `ExpressionAttributeValues` and JSON attribute values.	`Query` must include hash-key equality; `Scan` is compatibility-oriented and should be treated carefully on OLTP paths.

LIMIT, REST page size, DynamoDB Limit, and vector topk cap result output or evaluation windows. They do not by themselves prove the engine can find the first page without unsafe work.