deterministic order of saved mentions

hive/db/sql_scripts/update_hive_posts_mentions.sql

@@ -30,6 +30,7 @@ BEGIN
       )T( id_post, mention, author_id, block_num )
     )T( id_post, mention, author_id, block_num ) ON ha.name = T.mention
     WHERE ha.id != T.author_id
+    ORDER BY T.id_post
   ON CONFLICT DO NOTHING;
 
 END

tests_api @ ee534480

-Subproject commit e1439046adf7900ba3d6cbaeb5615d4dc6c837b5
+Subproject commit ee534480e5739b75968089859ee3663dfdabb126