Merge pull request #76 from CartoDB/cast-colnames-in-getavailableboundaries

casting return types to text

src/pg/sql/42_observatory_exploration.sql

@@ -67,7 +67,7 @@ BEGIN
   EXECUTE format($string$
               SELECT id, description,
                 name,
-                  aggregate,
+                  aggregate::text,
                   NULL::TEXT source -- TODO use tags
                   FROM observatory.OBS_column
                   where name ilike     '%%' || %L || '%%'
@@ -100,10 +100,10 @@ BEGIN
   EXECUTE
   $string$
       SELECT
-        column_id,
-        obs_column.description,
-        timespan,
-        tablename
+        column_id::text As column_id,
+        obs_column.description::text As description,
+        timespan::text As timespan,
+        tablename::text As tablename
       FROM
         observatory.OBS_table,
         observatory.OBS_column_table,