   ON wb_strings
   USING btree
   (id_string, string);
+
+CREATE INDEX idx_string_id
+  ON wb_strings
+  USING btree
+  (string, id_string);
 
 
 

  USING btree
  (id_object, obj_type, obj_value);

-- Index: idx_vo

-- DROP INDEX idx_vo;

      ON UPDATE NO ACTION ON DELETE NO ACTION,
  CONSTRAINT fk_object FOREIGN KEY (object)
      REFERENCES wb_objects (id_object) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION,
  CONSTRAINT uq_spo UNIQUE (subject, predicate, object)
)
WITH (
  OIDS=FALSE
