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Add compression settings view

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Add informational view that lists the settings
used while enabling compression on a hypertable.
This commit is contained in:
gayyappan 2020-07-15 13:06:05 -04:00 committed by gayyappan
parent 88f693887a
commit 926a1c9850
4 changed files with 62 additions and 1 deletions
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23
sql/views.sql
View File

@ -259,5 +259,28 @@ CREATE OR REPLACE VIEW timescaledb_information.data_node AS
LEFT OUTER JOIN LATERAL @extschema@.data_node_hypertable_info(CASE WHEN s.node_up THEN s.node_name ELSE NULL END) size ON TRUE
GROUP BY s.node_name, s.node_up, s.owner, s.options;
---compression parameters information ---
CREATE VIEW timescaledb_information.compression_settings
AS
SELECT
ht.schema_name,
ht.table_name,
segq.attname,
segq.segmentby_column_index,
segq.orderby_column_index,
segq.orderby_asc,
segq.orderby_nullsfirst
FROM
_timescaledb_catalog.hypertable_compression segq,
_timescaledb_catalog.hypertable ht
WHERE
segq.hypertable_id = ht.id
AND ( segq.segmentby_column_index IS NOT NULL
OR segq.orderby_column_index IS NOT NULL)
ORDER BY
table_name,
segmentby_column_index,
orderby_column_index;
GRANT USAGE ON SCHEMA timescaledb_information TO PUBLIC;
GRANT SELECT ON ALL TABLES IN SCHEMA timescaledb_information TO PUBLIC;

3
test/expected/pg_dump.out
View File

@ -535,6 +535,7 @@ WHERE refclassid = 'pg_catalog.pg_extension'::pg_catalog.regclass AND
ORDER BY objid::text DESC;
objid
-----------------------------------------------------
timescaledb_information.compression_settings
timescaledb_information.data_node
timescaledb_information.compressed_hypertable_stats
timescaledb_information.compressed_chunk_stats
@ -550,7 +551,7 @@ WHERE refclassid = 'pg_catalog.pg_extension'::pg_catalog.regclass AND
_timescaledb_internal.bgw_policy_chunk_stats
_timescaledb_internal.bgw_job_stat
_timescaledb_catalog.tablespace_id_seq
(15 rows)
(16 rows)
-- Make sure we can't run our restoring functions as a normal perm user as that would disable functionality for the whole db
\c :TEST_DBNAME :ROLE_DEFAULT_PERM_USER

35
tsl/test/expected/compression.out
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@ -63,6 +63,15 @@ select * from _timescaledb_catalog.hypertable_compression order by hypertable_id
1 | d | 4 | | 2 | t | f
(4 rows)
select * from timescaledb_information.compression_settings ;
schema_name | table_name | attname | segmentby_column_index | orderby_column_index | orderby_asc | orderby_nullsfirst
-------------+------------+---------+------------------------+----------------------+-------------+--------------------
public | foo | a | 1 | | |
public | foo | b | 2 | | |
public | foo | c | | 1 | f | t
public | foo | d | | 2 | t | f
(4 rows)
-- TEST2 compress-chunk for the chunks created earlier --
select compress_chunk( '_timescaledb_internal._hyper_1_2_chunk');
compress_chunk
@ -1124,6 +1133,32 @@ ERROR: constraint "fk_table1" requires column "col2" to be a timescaledb.compre
ALTER TABLE table1 SET (timescaledb.compress, timescaledb.compress_segmentby = 'col1,col2');
NOTICE: adding index _compressed_hypertable_23_col1__ts_meta_sequence_num_idx ON _timescaledb_internal._compressed_hypertable_23 USING BTREE(col1, _ts_meta_sequence_num)
NOTICE: adding index _compressed_hypertable_23_col2__ts_meta_sequence_num_idx ON _timescaledb_internal._compressed_hypertable_23 USING BTREE(col2, _ts_meta_sequence_num)
SELECT * FROM timescaledb_information.compression_settings ORDER BY table_name;
schema_name | table_name | attname | segmentby_column_index | orderby_column_index | orderby_asc | orderby_nullsfirst
-------------+----------------+-------------+------------------------+----------------------+-------------+--------------------
public | conditions | location | 1 | | |
public | conditions | time | | 1 | t | f
public | datatype_test | time | | 1 | f | t
public | foo | a | 1 | | |
public | foo | b | 2 | | |
public | foo | c | | 1 | f | t
public | foo | d | | 2 | t | f
public | ht5 | time | | 1 | f | t
public | hyper | device_id | 1 | | |
public | hyper | time | | 1 | t | f
public | metrics | time | | 1 | f | t
public | plan_inval | time | | 1 | f | t
public | rescan_test | id | 1 | | |
public | rescan_test | t | | 1 | f | t
public | table1 | col1 | 1 | | |
public | table1 | col2 | 2 | | |
public | test_collation | device_id | 1 | | |
public | test_collation | device_id_2 | 2 | | |
public | test_collation | val_1 | | 1 | t | f
public | test_collation | val_2 | | 2 | t | f
public | test_collation | time | | 3 | t | f
(21 rows)
-- test delete/update on non-compressed tables involving hypertables with compression
CREATE TABLE uncompressed_ht (
time timestamptz NOT NULL,

2
tsl/test/sql/compression.sql
View File

@ -29,6 +29,7 @@ SET timescaledb.enable_transparent_decompression to OFF;
select id, schema_name, table_name, compressed, compressed_hypertable_id from
_timescaledb_catalog.hypertable order by id;
select * from _timescaledb_catalog.hypertable_compression order by hypertable_id, attname;
select * from timescaledb_information.compression_settings ;
-- TEST2 compress-chunk for the chunks created earlier --
select compress_chunk( '_timescaledb_internal._hyper_1_2_chunk');
@ -451,6 +452,7 @@ SELECT create_hypertable('table1','col1', chunk_time_interval => 10);
ALTER TABLE table1 SET (timescaledb.compress, timescaledb.compress_segmentby = 'col1');
-- Listing all fields of the compound key should succeed:
ALTER TABLE table1 SET (timescaledb.compress, timescaledb.compress_segmentby = 'col1,col2');
SELECT * FROM timescaledb_information.compression_settings ORDER BY table_name;
-- test delete/update on non-compressed tables involving hypertables with compression
CREATE TABLE uncompressed_ht (