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https://github.com/timescale/timescaledb.git
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01924c75d8
RestrictInfo with OR need special handling which we currently do not do which can lead to segfaults in planner if unhandled.
199 lines
7.9 KiB
SQL
199 lines
7.9 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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-- qual pushdown tests for decompresschunk ---
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-- Test qual pushdown with ints
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CREATE TABLE meta (device_id INT PRIMARY KEY);
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CREATE TABLE hyper(
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time INT NOT NULL,
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device_id INT REFERENCES meta(device_id) ON DELETE CASCADE ON UPDATE CASCADE,
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val INT);
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SELECT * FROM create_hypertable('hyper', 'time', chunk_time_interval => 10);
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ALTER TABLE hyper SET (
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timescaledb.compress,
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timescaledb.compress_orderby = 'time',
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timescaledb.compress_segmentby = 'device_id');
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INSERT INTO meta VALUES (1), (2), (3), (4), (5);
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INSERT INTO hyper VALUES (1, 1, 1), (2, 2, 1), (3, 3, 1), (10, 3, 2), (11, 4, 2), (11, 5, 2);
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SELECT ch1.table_name AS "CHUNK_NAME", ch1.schema_name|| '.' || ch1.table_name AS "CHUNK_FULL_NAME"
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FROM _timescaledb_catalog.chunk ch1, _timescaledb_catalog.hypertable ht
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WHERE ch1.hypertable_id = ht.id AND ht.table_name LIKE 'hyper'
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ORDER BY ch1.id LIMIT 1 \gset
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SELECT compress_chunk(:'CHUNK_FULL_NAME');
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-- test for qual pushdown
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explain (costs off, verbose)
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SELECT
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FROM hyper
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WHERE time > 2::bigint and time < 4;
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explain (costs off, verbose)
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SELECT
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FROM hyper
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WHERE time = 3::bigint;
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SELECT *
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FROM hyper
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WHERE time > 2::bigint and time < 4;
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SELECT *
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FROM hyper
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WHERE time = 3::bigint;
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--- github issue 1855
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--- TESTs for meta column pushdown filters on exprs with casts.
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CREATE TABLE metaseg_tab (
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fmid smallint,
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factorid smallint,
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start_dt timestamp without time zone,
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end_dt timestamp without time zone,
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interval_number smallint,
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logret double precision,
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knowledge_date date NOT NULL
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);
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SELECT create_hypertable('metaseg_tab', 'end_dt', chunk_time_interval=>interval '1 month', create_default_indexes=>false);
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SELECT add_dimension('metaseg_tab', 'fmid', chunk_time_interval => 1);
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ALTER TABLE metaseg_tab SET (timescaledb.compress, timescaledb.compress_orderby= 'end_dt');
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INSERT INTO metaseg_tab values (56,0,'2012-12-10 09:45:00','2012-12-10 09:50:00',1,0.1,'2012-12-10');
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SELECT compress_chunk(i) from show_chunks('metaseg_tab') i;
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select factorid, end_dt, logret
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from metaseg_tab
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where fmid = 56
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and end_dt between '2012-12-10'::date and '2012-12-11'::date
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order by factorid, end_dt;
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explain (costs off, verbose)
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select factorid, end_dt, logret
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from metaseg_tab
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where fmid = 56
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and end_dt between '2012-12-10'::date and '2012-12-11'::date
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order by factorid, end_dt;
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--no pushdown here
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select factorid, end_dt, logret
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from metaseg_tab
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where fmid = 56
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and end_dt::date between '2012-12-10'::timestamp and '2012-12-11'::date
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order by factorid, end_dt;
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explain (costs off, verbose)
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select factorid, end_dt, logret
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from metaseg_tab
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where fmid = 56
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and end_dt::date between '2012-12-10'::timestamp and '2012-12-11'::date
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order by factorid, end_dt;
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--should fail
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\set ON_ERROR_STOP 0
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select factorid, end_dt, logret
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from metaseg_tab
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where fmid = 56
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and end_dt::date = 10;
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select factorid, end_dt, logret
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from metaseg_tab
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where fmid = 56
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and end_dt::date = 'dec 2010'::date;
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-- test casts between different char types are pushed down
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CREATE TABLE pushdown_relabel(time timestamptz NOT NULL, dev_vc varchar(10), dev_c char(10));
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SELECT table_name FROM create_hypertable('pushdown_relabel', 'time');
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ALTER TABLE pushdown_relabel SET (timescaledb.compress, timescaledb.compress_segmentby='dev_vc,dev_c');
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INSERT INTO pushdown_relabel SELECT '2000-01-01','varchar','char';
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SELECT compress_chunk(i) from show_chunks('pushdown_relabel') i;
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ANALYZE pushdown_relabel;
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EXPLAIN (costs off) SELECT * FROM pushdown_relabel WHERE dev_vc = 'varchar';
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EXPLAIN (costs off) SELECT * FROM pushdown_relabel WHERE dev_c = 'char';
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EXPLAIN (costs off) SELECT * FROM pushdown_relabel WHERE dev_vc = 'varchar' AND dev_c = 'char';
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EXPLAIN (costs off) SELECT * FROM pushdown_relabel WHERE dev_vc = 'varchar'::char(10) AND dev_c = 'char'::varchar;
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-- test again with index scans
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SET enable_seqscan TO false;
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EXPLAIN (costs off) SELECT * FROM pushdown_relabel WHERE dev_vc = 'varchar';
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EXPLAIN (costs off) SELECT * FROM pushdown_relabel WHERE dev_c = 'char';
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EXPLAIN (costs off) SELECT * FROM pushdown_relabel WHERE dev_vc = 'varchar' AND dev_c = 'char';
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EXPLAIN (costs off) SELECT * FROM pushdown_relabel WHERE dev_vc = 'varchar'::char(10) AND dev_c = 'char'::varchar;
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-- github issue #5286
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CREATE TABLE deleteme AS
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SELECT generate_series AS timestamp, 1 AS segment, 0 AS data
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FROM generate_series('2008-03-01 00:00'::timestamp with time zone,
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'2008-03-04 12:00', '1 second');
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SELECT create_hypertable('deleteme', 'timestamp', migrate_data => true);
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ALTER TABLE deleteme SET (
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timescaledb.compress,
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timescaledb.compress_segmentby = 'segment'
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);
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SELECT compress_chunk(i) FROM show_chunks('deleteme') i;
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EXPLAIN (costs off) SELECT sum(data) FROM deleteme WHERE segment::text like '%4%';
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EXPLAIN (costs off) SELECT sum(data) FROM deleteme WHERE '4' = segment::text;
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CREATE TABLE deleteme_with_bytea(time bigint NOT NULL, bdata bytea);
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SELECT create_hypertable('deleteme_with_bytea', 'time', chunk_time_interval => 1000000);
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INSERT INTO deleteme_with_bytea(time, bdata) VALUES (1001, E'\\x');
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INSERT INTO deleteme_with_bytea(time, bdata) VALUES (1001, NULL);
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ALTER TABLE deleteme_with_bytea SET (
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timescaledb.compress,
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timescaledb.compress_segmentby = 'bdata'
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);
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SELECT compress_chunk(i) FROM show_chunks('deleteme_with_bytea') i;
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EXPLAIN (costs off) SELECT '1' FROM deleteme_with_bytea WHERE bdata = E'\\x';
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EXPLAIN (costs off) SELECT '1' FROM deleteme_with_bytea WHERE bdata::text = '123';
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DROP table deleteme;
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DROP table deleteme_with_bytea;
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-- test sqlvaluefunction pushdown
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CREATE TABLE svf_pushdown(time timestamptz, c_date date, c_time time, c_timetz timetz, c_timestamp timestamptz, c_name text, c_bool bool);
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SELECT table_name FROM create_hypertable('svf_pushdown', 'time');
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ALTER TABLE svf_pushdown SET (timescaledb.compress,timescaledb.compress_segmentby='c_date,c_time, c_timetz,c_timestamp,c_name,c_bool');
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INSERT INTO svf_pushdown SELECT '2020-01-01';
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SELECT compress_chunk(show_chunks('svf_pushdown'));
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-- constraints should be pushed down into scan below decompresschunk in all cases
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_date = CURRENT_DATE;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_timetz = CURRENT_TIME;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_timetz = CURRENT_TIME(1);
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_timestamp = CURRENT_TIMESTAMP;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_timestamp = CURRENT_TIMESTAMP(1);
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_time = LOCALTIME;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_time = LOCALTIME(1);
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_timestamp = LOCALTIMESTAMP;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_timestamp = LOCALTIMESTAMP(1);
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_name = USER;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_name = CURRENT_USER;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_name = SESSION_USER;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_name = CURRENT_USER OR c_name = SESSION_USER;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_name = CURRENT_CATALOG;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_name = CURRENT_SCHEMA;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_bool;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_bool = true;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_bool = false;
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE NOT c_bool;
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-- current_query() is not a sqlvaluefunction and volatile so should not be pushed down
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EXPLAIN (costs off) SELECT * FROM svf_pushdown WHERE c_name = current_query();
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-- test or constraints in lateral query #6912
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SELECT FROM svf_pushdown m1,
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LATERAL(
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SELECT FROM svf_pushdown m2
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WHERE
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m1.time = m2.time AND
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EXISTS (SELECT random()) OR
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EXISTS (SELECT FROM meta) LIMIT 1
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) l;
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