text: -- interval check
  
  CREATE TABLE intervaltmp (a interval);
  
  \copy intervaltmp from 'data/interval.data'
  
  SET enable_seqscan=on;
  
  SELECT count(*) FROM intervaltmp WHERE a <  '199 days 21:21:23';
  
  SELECT count(*) FROM intervaltmp WHERE a <= '199 days 21:21:23';
  
  SELECT count(*) FROM intervaltmp WHERE a  = '199 days 21:21:23';
  
  SELECT count(*) FROM intervaltmp WHERE a >= '199 days 21:21:23';
  
  SELECT count(*) FROM intervaltmp WHERE a >  '199 days 21:21:23';
  
  CREATE INDEX intervalidx ON intervaltmp USING gist ( a );
  
  SET enable_seqscan=off;
  
  SELECT count(*) FROM intervaltmp WHERE a <  '199 days 21:21:23'::interval;
  
  SELECT count(*) FROM intervaltmp WHERE a <= '199 days 21:21:23'::interval;
  
  SELECT count(*) FROM intervaltmp WHERE a  = '199 days 21:21:23'::interval;
  
  SELECT count(*) FROM intervaltmp WHERE a >= '199 days 21:21:23'::interval;
  
  SELECT count(*) FROM intervaltmp WHERE a >  '199 days 21:21:23'::interval;
  
  