This is an automated email from the ASF dual-hosted git repository. davisp pushed a commit to branch feature/user-partitioned-databases-davisp in repository https://gitbox.apache.org/repos/asf/couchdb.git
commit 6716f61593694fc7e6da3e350c2b2b0ded44011c Author: Paul J. Davis <[email protected]> AuthorDate: Thu Oct 25 14:26:25 2018 -0500 Optimize all_docs queries in a single partition If a user specifies document ids that scope the query to a single partition key we can automatically determine that we only need to consuly a single shard range. Co-authored-by: Robert Newson <[email protected]> --- src/fabric/src/fabric_view_all_docs.erl | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/src/fabric/src/fabric_view_all_docs.erl b/src/fabric/src/fabric_view_all_docs.erl index 6acc792..3aaabe4 100644 --- a/src/fabric/src/fabric_view_all_docs.erl +++ b/src/fabric/src/fabric_view_all_docs.erl @@ -137,6 +137,32 @@ go(DbName, _Options, Workers, QueryArgs, Callback, Acc0) -> {ok, Resp} end. +shards(Db, Args) -> + DbPartitioned = fabric_util:is_partitioned(Db), + Partition = couch_mrview_util:get_extra(Args, partition), + NewArgs = case {DbPartitioned, Partition} of + {true, undefined} -> + % If a user specifies the same partition on both + % the start and end keys we can optimize the + % query by limiting to the partition shard. + Start = couch_partition:extract(Args#mrargs.start_key), + End = couch_partition:extract(Args#mrargs.end_key), + case {Start, End} of + {{Partition, SK}, {Partition, EK}} -> + A1 = Args#mrargs{ + start_key = SK, + end_key = EK + }, + couch_mrview_util:set_extra(A1, partition, Partition); + _ -> + Args + end; + _ -> + Args + end, + fabric_view:get_shards(Db, NewArgs). + + handle_message({rexi_DOWN, _, {_, NodeRef}, _}, _, State) -> fabric_view:check_down_shards(State, NodeRef);
