Allow filtering labels by a single character

When we use Gitlab::SQL::Pattern, this typically relates to a trigram
index. As the 'tri' indicates, we need at least three characters to be
able to use that index.

Labels don't have a trigram index, because we never allow you to search
for them globally: it's always in the context of a project or a
group. In that context, it's just as fast to search for a single
character (in general) because there is already a pretty specific index
being used.

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/gitlab/sql/pattern.rb b/lib/gitlab/sql/pattern.rb
index 07d0acdbae9..b698391c8bd 100644
--- a/lib/gitlab/sql/pattern.rb
+++ b/lib/gitlab/sql/pattern.rb
@@ -23,8 +23,12 @@ module Gitlab
           end
         end
 
+        def min_chars_for_partial_matching
+          MIN_CHARS_FOR_PARTIAL_MATCHING
+        end
+
         def partial_matching?(query)
-          query.length >= MIN_CHARS_FOR_PARTIAL_MATCHING
+          query.length >= min_chars_for_partial_matching
         end
 
         # column - The column name to search in.