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Ali Alsuliman <ali.al.solaiman@gmail.com>
committed
on 09 Apr
[ASTERIXDB-2516][RT] Modifty range map function of parallel sort
- user model changes: no
- storage format changes: no
- interface changes: … Show more
[ASTERIXDB-2516][RT] Modifty range map function of parallel sort

- user model changes: no

- storage format changes: no

- interface changes: no

Details:

Currently, the range map function of parallel sort passes "null"

to get a comparator to sort the samples and produce the range map.

The comparator provider will enforce providing a type and prevent

passing "null". The range map function needs to be updated to get

the types of the sort fields and use them to get comparators.

- changed the output type of the local sampling function from

list of list of ANY to binary. The old type computer was removed.

- added null writer aggregate function that just produces null as

an aggregate value. this is needed in order to propagate the type

of the sort fields from the local step to the global step so that

the range map function can know the types of the sort fields.

Change-Id: I7edbb10906cc4464210af87a5b1630ba3aecbde0

Reviewed-on: https://asterix-gerrit.ics.uci.edu/3333

Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>

Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>

Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>

Reviewed-by: Dmitry Lychagin <dmitry.lychagin@couchbase.com>

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