     edge_namespace,
     edge_name,
     (SELECT id FROM s_node_anno AS na 
-      WHERE na.namespace = node_annotation_namespace ů
+      WHERE na.namespace = node_annotation_namespace
         AND na.name = node_annotation_name
         AND na.val = node_annotation_value
     ),

"name" varchar_pattern_ops, val varchar_pattern_ops);
CREATE INDEX idx_s_node_anno_namespace ON s_node_anno (
namespace varchar_pattern_ops, "name" varchar_pattern_ops, val varchar_pattern_ops);

-- copy and adjust facts table
CREATE TABLE s_facts (

  USING btree
  ((sample & B'00001'::"bit"));

ALTER TABLE s_facts ALTER node_anno SET STATISTICS 2000;

VACUUM ANALYZE s_facts;
VACUUM ANALYZE s_node_anno;