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8f3bb0ba70
EXPLAIN ANALYZE for compressed DML would error out with `bogus varno` error because we would modify the original expressions of the plan that were still referenced in nodes instead of adjusting copies and using those copies in our internal scans.
36 lines
2.2 KiB
PL/PgSQL
36 lines
2.2 KiB
PL/PgSQL
-- 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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\set EXPLAIN 'EXPLAIN (costs off,timing off,summary off)'
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\set EXPLAIN_ANALYZE 'EXPLAIN (analyze,costs off,timing off,summary off)'
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CREATE TABLE decompress_tracking(time timestamptz not null, device text, value float, primary key(time, device));
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SELECT table_name FROM create_hypertable('decompress_tracking','time');
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ALTER TABLE decompress_tracking SET (timescaledb.compress, timescaledb.compress_segmentby='device');
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INSERT INTO decompress_tracking SELECT '2020-01-01'::timestamptz + format('%s hour', g)::interval, 'd1', random() FROM generate_series(1,10) g;
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INSERT INTO decompress_tracking SELECT '2020-01-01'::timestamptz + format('%s hour', g)::interval, 'd2', random() FROM generate_series(1,20) g;
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INSERT INTO decompress_tracking SELECT '2020-01-01'::timestamptz + format('%s hour', g)::interval, 'd3', random() FROM generate_series(1,30) g;
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SELECT count(compress_chunk(ch)) FROM show_chunks('decompress_tracking') ch;
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-- no tracking without analyze
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:EXPLAIN UPDATE decompress_tracking SET value = value + 3;
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BEGIN; :EXPLAIN_ANALYZE UPDATE decompress_tracking SET value = value + 3; ROLLBACK;
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BEGIN; :EXPLAIN_ANALYZE UPDATE decompress_tracking SET value = value + 3 WHERE device = 'd2'; ROLLBACK;
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BEGIN; :EXPLAIN_ANALYZE DELETE FROM decompress_tracking; ROLLBACK;
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BEGIN; :EXPLAIN_ANALYZE DELETE FROM decompress_tracking WHERE device = 'd3'; ROLLBACK;
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BEGIN; :EXPLAIN_ANALYZE INSERT INTO decompress_tracking SELECT '2020-01-01 1:30','d1',random(); ROLLBACK;
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BEGIN; :EXPLAIN_ANALYZE INSERT INTO decompress_tracking SELECT '2020-01-01','d2',random(); ROLLBACK;
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BEGIN; :EXPLAIN_ANALYZE INSERT INTO decompress_tracking SELECT '2020-01-01','d4',random(); ROLLBACK;
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BEGIN; :EXPLAIN_ANALYZE INSERT INTO decompress_tracking (VALUES ('2020-01-01 1:30','d1',random()),('2020-01-01 1:30','d2',random())); ROLLBACK;
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-- test prepared statements EXPLAIN still works after execution
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SET plan_cache_mode TO force_generic_plan;
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PREPARE p1 AS UPDATE decompress_tracking SET value = value + 3 WHERE device = 'd1';
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BEGIN; EXPLAIN EXECUTE p1; EXECUTE p1; EXPLAIN EXECUTE p1; ROLLBACK;
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DROP TABLE decompress_tracking;
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