text: -- This file and its contents are licensed under the Apache License 2.0.
  -- Please see the included NOTICE for copyright information and
  -- LICENSE-APACHE for a copy of the license.
  
  --------------------------------------------------------------------------
  -- show_chunks and drop_chunks functions on a compressed table 
  -- (issue https://github.com/timescale/timescaledb/issues/1535)
  
  -- create a table that will not be compressed
  CREATE TABLE public.uncompressed_table(time date NOT NULL, temp float8, device_id text);
  CREATE INDEX ON public.uncompressed_table(time DESC);
  SELECT create_hypertable('public.uncompressed_table', 'time', chunk_time_interval => interval '1 day');
  
  INSERT INTO public.uncompressed_table VALUES('2020-03-01', 1.0, 'dev1');
  INSERT INTO public.uncompressed_table VALUES('2020-03-05', 2.0, 'dev1');
  INSERT INTO public.uncompressed_table VALUES('2020-03-07', 3.0, 'dev1');
  INSERT INTO public.uncompressed_table VALUES('2020-03-08', 4.0, 'dev7');
  INSERT INTO public.uncompressed_table VALUES('2020-03-09', 5.0, 'dev7');
  INSERT INTO public.uncompressed_table VALUES('2020-03-10', 6.0, 'dev7');
  
  -- create next table that is going to be compressed:
  CREATE TABLE public.table_to_compress (time date NOT NULL, acq_id bigint, value bigint);
  CREATE INDEX idx_table_to_compress_acq_id ON public.table_to_compress(acq_id);
  SELECT create_hypertable('public.table_to_compress', 'time', chunk_time_interval => interval '1 day');
  ALTER TABLE public.table_to_compress SET (timescaledb.compress, timescaledb.compress_segmentby = 'acq_id');
  INSERT INTO public.table_to_compress VALUES ('2020-01-01', 1234567, 777888);
  INSERT INTO public.table_to_compress VALUES ('2020-02-01', 567567, 890890);
  INSERT INTO public.table_to_compress VALUES ('2020-02-10', 1234, 5678);
  SELECT show_chunks('public.table_to_compress');
  SELECT show_chunks(hypertable=>'public.table_to_compress', older_than=>'1 day'::interval);
  SELECT show_chunks(hypertable=>'public.table_to_compress', newer_than=>'1 day'::interval);
  SELECT show_chunks(); -- across all hypertables
  -- compress all chunks of the table:
  SELECT compress_chunk(show_chunks(hypertable=>'public.table_to_compress'));
  -- and run the queries again to make sure results are the same
  SELECT show_chunks('public.table_to_compress');
  SELECT show_chunks(hypertable=>'public.table_to_compress', older_than=>'1 day'::interval);
  SELECT show_chunks(hypertable=>'public.table_to_compress', newer_than=>'1 day'::interval);
  SELECT show_chunks(); 
  -- drop all hypertables' old chunks
  SELECT drop_chunks(older_than=>'1 day'::interval);
  SELECT show_chunks(); 
  