Stem revision trees after merging a path, COUCHDB-968

git-svn-id: https://svn.apache.org/repos/asf/couchdb/branches/1.0.x@1053519 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 14 insertions, 7 deletions

diff --git a/src/couchdb/couch_db.erl b/src/couchdb/couch_db.erl
index 27a3953b..f005a2ea 100644
--- a/src/couchdb/couch_db.erl
+++ b/src/couchdb/couch_db.erl
@@ -555,7 +555,8 @@ prep_and_validate_replicated_updates(Db, [Bucket|RestBuckets], [OldInfo|RestOldI
     {ok, #full_doc_info{rev_tree=OldTree}} ->
         NewRevTree = lists:foldl(
             fun(NewDoc, AccTree) ->
-                {NewTree, _} = couch_key_tree:merge(AccTree, couch_db:doc_to_tree(NewDoc)),
+                {NewTree, _} = couch_key_tree:merge(AccTree,
+                    couch_db:doc_to_tree(NewDoc), Db#db.revs_limit),
                 NewTree
             end,
             OldTree, Bucket),
diff --git a/src/couchdb/couch_db_updater.erl b/src/couchdb/couch_db_updater.erl
index 2cce4b69..eb1a3edc 100644
--- a/src/couchdb/couch_db_updater.erl
+++ b/src/couchdb/couch_db_updater.erl
@@ -495,10 +495,11 @@ merge_rev_trees(Limit, MergeConflicts, [NewDocs|RestDocsList],
         [OldDocInfo|RestOldInfo], AccNewInfos, AccRemoveSeqs, AccSeq) ->
     #full_doc_info{id=Id,rev_tree=OldTree,deleted=OldDeleted,update_seq=OldSeq}
             = OldDocInfo,
-    NewRevTree0 = lists:foldl(
+    NewRevTree = lists:foldl(
         fun({Client, #doc{revs={Pos,[_Rev|PrevRevs]}}=NewDoc}, AccTree) ->
             if not MergeConflicts ->
-                case couch_key_tree:merge(AccTree, couch_db:doc_to_tree(NewDoc)) of
+                case couch_key_tree:merge(AccTree, couch_db:doc_to_tree(NewDoc),
+                    Limit) of
                 {_NewTree, conflicts} when (not OldDeleted) ->
                     send_result(Client, Id, {Pos-1,PrevRevs}, conflict),
                     AccTree;
@@ -529,7 +530,7 @@ merge_rev_trees(Limit, MergeConflicts, [NewDocs|RestDocsList],
                                 NewDoc#doc{revs={OldPos, [OldRev]}}),
                         NewDoc2 = NewDoc#doc{revs={OldPos + 1, [NewRevId, OldRev]}},
                         {NewTree2, _} = couch_key_tree:merge(AccTree,
-                                couch_db:doc_to_tree(NewDoc2)),
+                                couch_db:doc_to_tree(NewDoc2), Limit),
                         % we changed the rev id, this tells the caller we did
                         send_result(Client, Id, {Pos-1,PrevRevs},
                                 {ok, {OldPos + 1, NewRevId}}),
@@ -543,12 +544,11 @@ merge_rev_trees(Limit, MergeConflicts, [NewDocs|RestDocsList],
                 end;
             true ->
                 {NewTree, _} = couch_key_tree:merge(AccTree,
-                            couch_db:doc_to_tree(NewDoc)),
+                            couch_db:doc_to_tree(NewDoc), Limit),
                 NewTree
             end
         end,
         OldTree, NewDocs),
-    NewRevTree = couch_key_tree:stem(NewRevTree0, Limit),
     if NewRevTree == OldTree ->
         % nothing changed
         merge_rev_trees(Limit, MergeConflicts, RestDocsList, RestOldInfo,
diff --git a/src/couchdb/couch_key_tree.erl b/src/couchdb/couch_key_tree.erl
index 7c84865c..6701da58 100644
--- a/src/couchdb/couch_key_tree.erl
+++ b/src/couchdb/couch_key_tree.erl
@@ -12,7 +12,7 @@
 
 -module(couch_key_tree).
 
--export([merge/2, find_missing/2, get_key_leafs/2, get_full_key_paths/2, get/2]).
+-export([merge/3, find_missing/2, get_key_leafs/2, get_full_key_paths/2, get/2]).
 -export([map/2, get_all_leafs/1, count_leafs/1, remove_leafs/2,
     get_all_leafs_full/1,stem/2,map_leafs/2]).
 
@@ -23,6 +23,12 @@
 
 % partial trees arranged by how much they are cut off.
 
+-spec merge([path()], path(), pos_integer()) -> {[path()],
+    conflicts | no_conflicts}.
+merge(Paths, Path, Depth) ->
+    {Merged, Conflicts} = merge(Paths, Path),
+    {stem(Merged, Depth), Conflicts}.
+
 -spec merge([path()], path()) -> {[path()], conflicts | no_conflicts}.
 merge(Paths, Path) ->
     {ok, Merged, HasConflicts} = merge_one(Paths, Path, [], false),