diff --git a/src/pg/sql/16_getis.sql b/src/pg/sql/16_getis.sql
index 6e52d50..578f15a 100644
--- a/src/pg/sql/16_getis.sql
+++ b/src/pg/sql/16_getis.sql
@@ -9,8 +9,10 @@ CREATE OR REPLACE FUNCTION
       permutations INT DEFAULT 999,
       geom_col TEXT DEFAULT 'the_geom',
       id_col TEXT DEFAULT 'cartodb_id')
-RETURNS TABLE (z_val NUMERIC, p_val NUMERIC, p_z_sim NUMERIC, rowid BIGINT)
+RETURNS TABLE (z_score NUMERIC, p_value NUMERIC, p_z_sim NUMERIC, rowid BIGINT)
 AS $$
   from crankshaft.clustering import getis_ord
   return getis_ord(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col)
 $$ LANGUAGE plpythonu;
+
+-- TODO: make a version that accepts the values as arrays