diff --git a/postgresql/schemas/db-1.sql b/postgresql/schemas/db-1.sql
index 9430ce1..16dbc1b 100644
--- a/postgresql/schemas/db-1.sql
+++ b/postgresql/schemas/db-1.sql
@@ -161,7 +161,7 @@ END;
 $$
 LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION real_medium.create_article(_title varchar(255), _slug varchar(255), _body text, _description text, _user_id text, _tags varchar(255)[])
+CREATE OR REPLACE FUNCTION real_medium.create_article_v1(_title varchar(255), _slug varchar(255), _body text, _description text, _user_id text, _tags varchar(255)[])
         RETURNS text
         AS $$
 DECLARE
@@ -192,6 +192,15 @@ END;
 $$
 LANGUAGE plpgsql;
 
+CREATE OR REPLACE FUNCTION real_medium.create_article(_title varchar(255), _slug varchar(255), _body text, _description text, _user_id text, _tags varchar(255)[])
+        RETURNS text
+        AS $$
+BEGIN
+        RETURN real_medium.create_article_v1(_title, _slug, _body, _description, _user_id, _tags);
+END;
+$$
+LANGUAGE plpgsql;
+
 CREATE OR REPLACE FUNCTION real_medium.is_favorited_article(_article_id text, _user_id text = NULL)
         RETURNS bool
         AS $$
@@ -217,7 +226,7 @@ BEGIN
                 username,
                 bio,
                 image,
-                CASE WHEN _follower_id = NULL THEN
+                CASE WHEN _follower_id IS NULL THEN
                         FALSE
                 ELSE
                         real_medium.is_following(_id, _follower_id)
@@ -230,7 +239,7 @@ END;
 $$
 LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION real_medium.get_article_with_author_profile(_article_id text, _follower_id text = NULL)
+CREATE OR REPLACE FUNCTION real_medium.get_article_with_author_profile_v1(_article_id text, _follower_id text = NULL)
         RETURNS SETOF real_medium.tagged_article_with_author_profile
         AS $$
 BEGIN
@@ -259,7 +268,20 @@ END;
 $$
 LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION real_medium.get_article_with_author_profile_by_slug(_slug varchar(255), _follower_id text = NULL)
+CREATE OR REPLACE FUNCTION real_medium.get_article_with_author_profile(_article_id text, _follower_id text = NULL)
+        RETURNS SETOF real_medium.tagged_article_with_author_profile
+        AS $$
+BEGIN
+        RETURN QUERY
+        SELECT
+                *
+        FROM
+                real_medium.get_article_with_author_profile_v1(_article_id, _follower_id);
+END;
+$$
+LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION real_medium.get_article_with_author_profile_by_slug_v1(_slug varchar(255), _follower_id text = NULL)
         RETURNS SETOF real_medium.tagged_article_with_author_profile
         AS $$
 DECLARE
@@ -296,6 +318,19 @@ END;
 $$
 LANGUAGE plpgsql;
 
+CREATE OR REPLACE FUNCTION real_medium.get_article_with_author_profile_by_slug(_slug varchar(255), _follower_id text = NULL)
+        RETURNS SETOF real_medium.tagged_article_with_author_profile
+        AS $$
+BEGIN
+        RETURN QUERY
+        SELECT
+                *
+        FROM
+                real_medium.get_article_with_author_profile_by_slug_v1(_slug, _follower_id);
+END;
+$$
+LANGUAGE plpgsql;
+
 CREATE OR REPLACE FUNCTION real_medium.get_feed_articles(_user_id text, _limit int = 20, _offset int = 0)
         RETURNS SETOF real_medium.tagged_article_with_author_profile
         AS $$
@@ -400,5 +435,3 @@ LANGUAGE plpgsql;
 CREATE INDEX IF NOT EXISTS idx_createdat ON real_medium.articles(created_at DESC);
 
 CREATE INDEX IF NOT EXISTS idx_tagname ON real_medium.tag_list(tag_name);
-
-