relation_table <-
keys: vectorVector that describes the column properties. Each element of this vector
is one of the names key, unique or data:
- key
- The column is used to find association vectors (rows), but may have
multiple rows with the same value for this column. The table created a chain_table
object for fast access to all rows with some specified key value.
- unique
- Each row in the table has a different value in this column and this
column is used for indexing. The table creates a
hash_table object
for fast access.
- data
- This column just holds associated data. No (fast) lookup is provided.
