Adding OBS_search function and tests

src/pg/sql/42_observatory_exploration.sql

@@ -0,0 +1,33 @@
+-- Functions used to search the observatory for measures
+--------------------------------------------------------------------------------
+-- TODO allow the user to specify the boundary to search for measures
+--
+
+CREATE OR REPLACE FUNCTION cdb_observatory.OBS_Search(
+  search_term text,
+  relevant_boundary text DEFAULT null
+)
+RETURNS TABLE(description text, name text, aggregate text, source text)  as $$
+DECLARE
+  boundary_term text;
+BEGIN
+  IF relevant_boundary then
+    boundary_term = '';
+  else
+    boundary_term = '';
+  END IF;
+
+  RETURN QUERY
+  EXECUTE format($string$
+              SELECT description,
+                name,
+                  aggregate,
+                  replace(split_part(id,'".', 1),'"', '') source
+                  FROM observatory.OBS_column
+                  where name ilike '%%%s%%'
+                  or description ilike '%%%s%%'
+                  %s
+                $string$, search_term, search_term,boundary_term);
+  RETURN;
+END
+$$ LANGUAGE plpgsql;