add sql

sql/set_artist_name.sql

@@ -0,0 +1,23 @@
+CREATE OR REPLACE PROCEDURE set_artist_name(in_url text) AS $$
+DECLARE
+	temp_artist_id integer;
+	temp_artist_name text;
+	temp_artist artist%ROWTYPE;
+BEGIN
+	temp_artist_name = get_artist_name(in_url);
+	temp_artist_name = convert_artist_name(temp_artist_name);
+
+	SELECT * INTO temp_artist FROM artist 
+	WHERE artist.name = temp_artist_name;
+
+    IF NOT FOUND THEN
+        INSERT INTO artist (name) VALUES (temp_artist_name);
+    END IF;
+	
+	SELECT artist.id INTO temp_artist_id FROM artist
+	WHERE artist.name = temp_artist_name;
+	
+	UPDATE artist_website SET artist_id = temp_artist_id 
+	WHERE url = in_url;
+END;
+$$ LANGUAGE plpgsql;