cascalog.in-memory.join — cascalog/cascalog-core 3.0.0

inner-join clj

(inner-join l-grouped r-grouped)

Inner joins two maps that both have been grouped by the same function. This is an inner join, so nils are discarded.

join clj

(join l-grouped r-grouped l-type r-type l-fields r-fields)

Dispatches to all the different join types and returns a vector with the collection of joined tuples and the type of join

left-excluding-join clj

(left-excluding-join l-grouped r-grouped r-fields)

A left join that only returns values where the right side is nil

left-existence-join clj

(left-existence-join l-grouped r-grouped r-fields existence-field)

Similar to a left-join except it includes an additional argument, existence-field, that captures the boolean about whether a join was found or not. True if a left value was found. False if not.

left-join clj

(left-join l-grouped r-grouped r-fields)

Joins two maps (a left and a right) that have been grouped by the same function. Keeps only values found on the left and returns nil for values not found on the right.

outer-join clj

(outer-join l-grouped r-grouped l-fields r-fields)

A join that contains all of the values between the two maps, but none duplicated