-- This file and its contents are licensed under the Timescale License.
-- Please see the included NOTICE for copyright information and
-- LICENSE-TIMESCALE 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.uncompressed_table');
SELECT show_chunks('public.table_to_compress');
SELECT show_chunks('public.table_to_compress', older_than=>'1 day'::interval);
SELECT show_chunks('public.table_to_compress', newer_than=>'1 day'::interval);
-- compress all chunks of the table:
SELECT compress_chunk(show_chunks('public.table_to_compress'));
-- and run the queries again to make sure results are the same
SELECT show_chunks('public.uncompressed_table');
SELECT show_chunks('public.table_to_compress');
SELECT show_chunks('public.table_to_compress', older_than=>'1 day'::interval);
SELECT show_chunks('public.table_to_compress', newer_than=>'1 day'::interval);
-- truncate one compressed chunk
SELECT chunk_schema || '.' || chunk_name as "CHNAME"
FROM timescaledb_information.chunks
WHERE hypertable_name = 'table_to_compress' and hypertable_schema = 'public'
ORDER BY chunk_name LIMIT 1
\gset
SELECT count(*) FROM :CHNAME;
TRUNCATE TABLE :CHNAME;
SELECT count(*) FROM :CHNAME;
-- drop all hypertables' old chunks
SELECT drop_chunks(table_name::regclass, older_than=>'1 day'::interval)
  FROM _timescaledb_catalog.hypertable
 WHERE schema_name = current_schema()
ORDER BY table_name DESC;
SELECT show_chunks('public.uncompressed_table');
SELECT show_chunks('public.table_to_compress');

-- test calling on internal compressed table
SELECT
  format('%I.%I', ht.schema_name, ht.table_name) AS "TABLENAME"
FROM
  _timescaledb_catalog.hypertable ht
  INNER JOIN _timescaledb_catalog.hypertable uncompress ON (ht.id = uncompress.compressed_hypertable_id
      AND uncompress.table_name = 'table_to_compress') \gset

\set ON_ERROR_STOP 0
SELECT show_chunks(:'TABLENAME');
SELECT drop_chunks(:'TABLENAME',now());
\set ON_ERROR_STOP 1

