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406901d838
Files and directories using "hyperstore" as part of the name is moved to the new name using "hypercore".
52 lines
2.0 KiB
SQL
52 lines
2.0 KiB
SQL
-- This file and its contents are licensed under the Timescale License.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-TIMESCALE for a copy of the license.
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\ir include/setup_hyperstore.sql
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alter table :chunk1 set access method hyperstore;
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-- check that all chunks are compressed
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select chunk_name, compression_status from chunk_compression_stats(:'hypertable');
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create view compressed_chunks as
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with reg_chunk as (
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select * from _timescaledb_catalog.chunk where compressed_chunk_id IS NOT NULL
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)
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select format('%I.%I', reg_chunk.schema_name, reg_chunk.table_name)::regclass as chunk,
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format('%I.%I', cpr_chunk.schema_name, cpr_chunk.table_name)::regclass as compressed_chunk
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from _timescaledb_catalog.chunk cpr_chunk
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inner join reg_chunk on (cpr_chunk.id = reg_chunk.compressed_chunk_id);
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select compressed_chunk as cchunk1 from compressed_chunks where chunk = :'chunk1'::regclass \gset
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-- save original counts
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select location_id, count(*) into orig from :hypertable GROUP BY location_id;
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-- show original compressed segment count
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select count(*) from :cchunk1;
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-- update one location_id to decompress some data
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update :hypertable set temp=1.0 where location_id=1;
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-- first try CLUSTER since implemented with same codepath as VACUUM FULL
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\set ON_ERROR_STOP 0
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cluster :chunk1;
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cluster :hypertable using hypertable_location_id_idx;
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\set ON_ERROR_STOP 1
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-- some, but not all, data decompressed
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select count(*) from :cchunk1;
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-- run vacuum full to recompress
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vacuum full :hypertable;
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-- should now be fully compressed again
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select count(*) from :cchunk1;
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-- also try vacuum full on chunk level
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update :hypertable set temp=1.0 where location_id=1;
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select count(*) from :cchunk1;
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vacuum full :hypertable;
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select count(*) from :cchunk1;
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-- check that table data (or at least counts) is still the same
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select location_id, count(*) into comp from :hypertable GROUP BY location_id;
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select * from orig join comp using (location_id) where orig.count != comp.count;
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