keySet property
key_set identifies the rows to be yielded.
key_set names the primary keys of the rows in table to be yielded,
unless index is present. If index is present, then key_set instead names
index keys in index. If the partition_token field is empty, rows are
yielded in table primary key order (if index is empty) or index key order
(if index is non-empty). If the partition_token field is not empty, rows
will be yielded in an unspecified order. It is not an error for the
key_set to name rows that do not exist in the database. Read yields
nothing for nonexistent rows.
Required.
Implementation
KeySet? keySet;