upstream/postgresql
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2026-05-26 19:28:27 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions
postgresql/src/test/regress/sql/brin.sql
Michael Paquier 6fd5071909 Set query ID in parallel workers for vacuum, BRIN and btree 
All these code paths use their own entry point when starting parallel
workers, but failed to set a query ID, even if they set a text query.
Hence, this data would be missed in pg_stat_activity for the worker
processes.  The main entry point for parallel query processing,
ParallelQueryMain(), is already doing that by saving its query ID in a
dummy PlannedStmt, but not the others.  The code is changed so as the
query ID of these queries is set in their shared state, and reported
back once the parallel workers start.

Some tests are added to show how the failures can happen for btree and
BRIN with a parallel build enforced, which are able to trigger a failure
in an assertion added by 24f5205948 in the recovery TAP test
027_stream_regress.pl where pg_stat_statements is always loaded.  In
this case, the executor path was taken because the index expression
needs to be flattened when building its IndexInfo.

Alexander Lakhin has noticed the problem in btree, and I have noticed
that the issue was more spread.  This is arguably a bug, but nobody has
complained about that until now, so no backpatch is done out of caution.
If folks would like to see a backpatch, well, let me know.

Reported-by: Alexander Lakhin
Reviewed-by: Sami Imseih
Discussion: https://postgr.es/m/cf3547c1-498a-6a61-7b01-819f902a251f@gmail.com
2024-09-30 08:43:28 +09:00

536 lines
18 KiB
PL/PgSQL
Raw Blame History

CREATE TABLE brintest (byteacol bytea,
charcol "char",
namecol name,
int8col bigint,
int2col smallint,
int4col integer,
textcol text,
oidcol oid,
tidcol tid,
float4col real,
float8col double precision,
macaddrcol macaddr,
inetcol inet,
cidrcol cidr,
bpcharcol character,
datecol date,
timecol time without time zone,
timestampcol timestamp without time zone,
timestamptzcol timestamp with time zone,
intervalcol interval,
timetzcol time with time zone,
bitcol bit(10),
varbitcol bit varying(16),
numericcol numeric,
uuidcol uuid,
int4rangecol int4range,
lsncol pg_lsn,
boxcol box
) WITH (fillfactor=10, autovacuum_enabled=off);
INSERT INTO brintest SELECT
repeat(stringu1, 8)::bytea,
substr(stringu1, 1, 1)::"char",
stringu1::name, 142857 * tenthous,
thousand,
twothousand,
repeat(stringu1, 8),
unique1::oid,
format('(%s,%s)', tenthous, twenty)::tid,
(four + 1.0)/(hundred+1),
odd::float8 / (tenthous + 1),
format('%s:00:%s:00:%s:00', to_hex(odd), to_hex(even), to_hex(hundred))::macaddr,
inet '10.2.3.4/24' + tenthous,
cidr '10.2.3/24' + tenthous,
substr(stringu1, 1, 1)::bpchar,
date '1995-08-15' + tenthous,
time '01:20:30' + thousand * interval '18.5 second',
timestamp '1942-07-23 03:05:09' + tenthous * interval '36.38 hours',
timestamptz '1972-10-10 03:00' + thousand * interval '1 hour',
justify_days(justify_hours(tenthous * interval '12 minutes')),
timetz '01:30:20+02' + hundred * interval '15 seconds',
thousand::bit(10),
tenthous::bit(16)::varbit,
tenthous::numeric(36,30) * fivethous * even / (hundred + 1),
format('%s%s-%s-%s-%s-%s%s%s', to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'))::uuid,
int4range(thousand, twothousand),
format('%s/%s%s', odd, even, tenthous)::pg_lsn,
box(point(odd, even), point(thousand, twothousand))
FROM tenk1 ORDER BY unique2 LIMIT 100;
-- throw in some NULL's and different values
INSERT INTO brintest (inetcol, cidrcol, int4rangecol) SELECT
inet 'fe80::6e40:8ff:fea9:8c46' + tenthous,
cidr 'fe80::6e40:8ff:fea9:8c46' + tenthous,
'empty'::int4range
FROM tenk1 ORDER BY thousand, tenthous LIMIT 25;
CREATE INDEX brinidx ON brintest USING brin (
byteacol,
charcol,
namecol,
int8col,
int2col,
int4col,
textcol,
oidcol,
tidcol,
float4col,
float8col,
macaddrcol,
inetcol inet_inclusion_ops,
inetcol inet_minmax_ops,
cidrcol inet_inclusion_ops,
cidrcol inet_minmax_ops,
bpcharcol,
datecol,
timecol,
timestampcol,
timestamptzcol,
intervalcol,
timetzcol,
bitcol,
varbitcol,
numericcol,
uuidcol,
int4rangecol,
lsncol,
boxcol
) with (pages_per_range = 1);
CREATE TABLE brinopers (colname name, typ text,
op text[], value text[], matches int[],
check (cardinality(op) = cardinality(value)),
check (cardinality(op) = cardinality(matches)));
INSERT INTO brinopers VALUES
('byteacol', 'bytea',
'{>, >=, =, <=, <}',
'{AAAAAA, AAAAAA, BNAAAABNAAAABNAAAABNAAAABNAAAABNAAAABNAAAABNAAAA, ZZZZZZ, ZZZZZZ}',
'{100, 100, 1, 100, 100}'),
('charcol', '"char"',
'{>, >=, =, <=, <}',
'{A, A, M, Z, Z}',
'{97, 100, 6, 100, 98}'),
('namecol', 'name',
'{>, >=, =, <=, <}',
'{AAAAAA, AAAAAA, MAAAAA, ZZAAAA, ZZAAAA}',
'{100, 100, 2, 100, 100}'),
('int2col', 'int2',
'{>, >=, =, <=, <}',
'{0, 0, 800, 999, 999}',
'{100, 100, 1, 100, 100}'),
('int2col', 'int4',
'{>, >=, =, <=, <}',
'{0, 0, 800, 999, 1999}',
'{100, 100, 1, 100, 100}'),
('int2col', 'int8',
'{>, >=, =, <=, <}',
'{0, 0, 800, 999, 1428427143}',
'{100, 100, 1, 100, 100}'),
('int4col', 'int2',
'{>, >=, =, <=, <}',
'{0, 0, 800, 1999, 1999}',
'{100, 100, 1, 100, 100}'),
('int4col', 'int4',
'{>, >=, =, <=, <}',
'{0, 0, 800, 1999, 1999}',
'{100, 100, 1, 100, 100}'),
('int4col', 'int8',
'{>, >=, =, <=, <}',
'{0, 0, 800, 1999, 1428427143}',
'{100, 100, 1, 100, 100}'),
('int8col', 'int2',
'{>, >=}',
'{0, 0}',
'{100, 100}'),
('int8col', 'int4',
'{>, >=}',
'{0, 0}',
'{100, 100}'),
('int8col', 'int8',
'{>, >=, =, <=, <}',
'{0, 0, 1257141600, 1428427143, 1428427143}',
'{100, 100, 1, 100, 100}'),
('textcol', 'text',
'{>, >=, =, <=, <}',
'{ABABAB, ABABAB, BNAAAABNAAAABNAAAABNAAAABNAAAABNAAAABNAAAABNAAAA, ZZAAAA, ZZAAAA}',
'{100, 100, 1, 100, 100}'),
('oidcol', 'oid',
'{>, >=, =, <=, <}',
'{0, 0, 8800, 9999, 9999}',
'{100, 100, 1, 100, 100}'),
('tidcol', 'tid',
'{>, >=, =, <=, <}',
'{"(0,0)", "(0,0)", "(8800,0)", "(9999,19)", "(9999,19)"}',
'{100, 100, 1, 100, 100}'),
('float4col', 'float4',
'{>, >=, =, <=, <}',
'{0.0103093, 0.0103093, 1, 1, 1}',
'{100, 100, 4, 100, 96}'),
('float4col', 'float8',
'{>, >=, =, <=, <}',
'{0.0103093, 0.0103093, 1, 1, 1}',
'{100, 100, 4, 100, 96}'),
('float8col', 'float4',
'{>, >=, =, <=, <}',
'{0, 0, 0, 1.98, 1.98}',
'{99, 100, 1, 100, 100}'),
('float8col', 'float8',
'{>, >=, =, <=, <}',
'{0, 0, 0, 1.98, 1.98}',
'{99, 100, 1, 100, 100}'),
('macaddrcol', 'macaddr',
'{>, >=, =, <=, <}',
'{00:00:01:00:00:00, 00:00:01:00:00:00, 2c:00:2d:00:16:00, ff:fe:00:00:00:00, ff:fe:00:00:00:00}',
'{99, 100, 2, 100, 100}'),
('inetcol', 'inet',
'{&&, =, <, <=, >, >=, >>=, >>, <<=, <<}',
'{10/8, 10.2.14.231/24, 255.255.255.255, 255.255.255.255, 0.0.0.0, 0.0.0.0, 10.2.14.231/24, 10.2.14.231/25, 10.2.14.231/8, 0/0}',
'{100, 1, 100, 100, 125, 125, 2, 2, 100, 100}'),
('inetcol', 'inet',
'{&&, >>=, <<=, =}',
'{fe80::6e40:8ff:fea9:a673/32, fe80::6e40:8ff:fea9:8c46, fe80::6e40:8ff:fea9:a673/32, fe80::6e40:8ff:fea9:8c46}',
'{25, 1, 25, 1}'),
('inetcol', 'cidr',
'{&&, <, <=, >, >=, >>=, >>, <<=, <<}',
'{10/8, 255.255.255.255, 255.255.255.255, 0.0.0.0, 0.0.0.0, 10.2.14/24, 10.2.14/25, 10/8, 0/0}',
'{100, 100, 100, 125, 125, 2, 2, 100, 100}'),
('inetcol', 'cidr',
'{&&, >>=, <<=, =}',
'{fe80::/32, fe80::6e40:8ff:fea9:8c46, fe80::/32, fe80::6e40:8ff:fea9:8c46}',
'{25, 1, 25, 1}'),
('cidrcol', 'inet',
'{&&, =, <, <=, >, >=, >>=, >>, <<=, <<}',
'{10/8, 10.2.14/24, 255.255.255.255, 255.255.255.255, 0.0.0.0, 0.0.0.0, 10.2.14.231/24, 10.2.14.231/25, 10.2.14.231/8, 0/0}',
'{100, 2, 100, 100, 125, 125, 2, 2, 100, 100}'),
('cidrcol', 'inet',
'{&&, >>=, <<=, =}',
'{fe80::6e40:8ff:fea9:a673/32, fe80::6e40:8ff:fea9:8c46, fe80::6e40:8ff:fea9:a673/32, fe80::6e40:8ff:fea9:8c46}',
'{25, 1, 25, 1}'),
('cidrcol', 'cidr',
'{&&, =, <, <=, >, >=, >>=, >>, <<=, <<}',
'{10/8, 10.2.14/24, 255.255.255.255, 255.255.255.255, 0.0.0.0, 0.0.0.0, 10.2.14/24, 10.2.14/25, 10/8, 0/0}',
'{100, 2, 100, 100, 125, 125, 2, 2, 100, 100}'),
('cidrcol', 'cidr',
'{&&, >>=, <<=, =}',
'{fe80::/32, fe80::6e40:8ff:fea9:8c46, fe80::/32, fe80::6e40:8ff:fea9:8c46}',
'{25, 1, 25, 1}'),
('bpcharcol', 'bpchar',
'{>, >=, =, <=, <}',
'{A, A, W, Z, Z}',
'{97, 100, 6, 100, 98}'),
('datecol', 'date',
'{>, >=, =, <=, <}',
'{1995-08-15, 1995-08-15, 2009-12-01, 2022-12-30, 2022-12-30}',
'{100, 100, 1, 100, 100}'),
('timecol', 'time',
'{>, >=, =, <=, <}',
'{01:20:30, 01:20:30, 02:28:57, 06:28:31.5, 06:28:31.5}',
'{100, 100, 1, 100, 100}'),
('timestampcol', 'timestamp',
'{>, >=, =, <=, <}',
'{1942-07-23 03:05:09, 1942-07-23 03:05:09, 1964-03-24 19:26:45, 1984-01-20 22:42:21, 1984-01-20 22:42:21}',
'{100, 100, 1, 100, 100}'),
('timestampcol', 'timestamptz',
'{>, >=, =, <=, <}',
'{1942-07-23 03:05:09, 1942-07-23 03:05:09, 1964-03-24 19:26:45, 1984-01-20 22:42:21, 1984-01-20 22:42:21}',
'{100, 100, 1, 100, 100}'),
('timestamptzcol', 'timestamptz',
'{>, >=, =, <=, <}',
'{1972-10-10 03:00:00-04, 1972-10-10 03:00:00-04, 1972-10-19 09:00:00-07, 1972-11-20 19:00:00-03, 1972-11-20 19:00:00-03}',
'{100, 100, 1, 100, 100}'),
('intervalcol', 'interval',
'{>, >=, =, <=, <}',
'{00:00:00, 00:00:00, 1 mons 13 days 12:24, 2 mons 23 days 07:48:00, 1 year}',
'{100, 100, 1, 100, 100}'),
('timetzcol', 'timetz',
'{>, >=, =, <=, <}',
'{01:30:20+02, 01:30:20+02, 01:35:50+02, 23:55:05+02, 23:55:05+02}',
'{99, 100, 2, 100, 100}'),
('bitcol', 'bit(10)',
'{>, >=, =, <=, <}',
'{0000000010, 0000000010, 0011011110, 1111111000, 1111111000}',
'{100, 100, 1, 100, 100}'),
('varbitcol', 'varbit(16)',
'{>, >=, =, <=, <}',
'{0000000000000100, 0000000000000100, 0001010001100110, 1111111111111000, 1111111111111000}',
'{100, 100, 1, 100, 100}'),
('numericcol', 'numeric',
'{>, >=, =, <=, <}',
'{0.00, 0.01, 2268164.347826086956521739130434782609, 99470151.9, 99470151.9}',
'{100, 100, 1, 100, 100}'),
('uuidcol', 'uuid',
'{>, >=, =, <=, <}',
'{00040004-0004-0004-0004-000400040004, 00040004-0004-0004-0004-000400040004, 52225222-5222-5222-5222-522252225222, 99989998-9998-9998-9998-999899989998, 99989998-9998-9998-9998-999899989998}',
'{100, 100, 1, 100, 100}'),
('int4rangecol', 'int4range',
'{<<, &<, &&, &>, >>, @>, <@, =, <, <=, >, >=}',
'{"[10000,)","[10000,)","(,]","[3,4)","[36,44)","(1500,1501]","[3,4)","[222,1222)","[36,44)","[43,1043)","[367,4466)","[519,)"}',
'{53, 53, 53, 53, 50, 22, 72, 1, 74, 75, 34, 21}'),
('int4rangecol', 'int4range',
'{@>, <@, =, <=, >, >=}',
'{empty, empty, empty, empty, empty, empty}',
'{125, 72, 72, 72, 53, 125}'),
('int4rangecol', 'int4',
'{@>}',
'{1500}',
'{22}'),
('lsncol', 'pg_lsn',
'{>, >=, =, <=, <, IS, IS NOT}',
'{0/1200, 0/1200, 44/455222, 198/1999799, 198/1999799, NULL, NULL}',
'{100, 100, 1, 100, 100, 25, 100}'),
('boxcol', 'point',
'{@>}',
'{"(500,43)"}',
'{11}'),
('boxcol', 'box',
'{<<, &<, &&, &>, >>, <<|, &<|, |&>, |>>, @>, <@, ~=}',
'{"((1000,2000),(3000,4000))","((1,2),(3000,4000))","((1,2),(3000,4000))","((1,2),(3000,4000))","((1,2),(3,4))","((1000,2000),(3000,4000))","((1,2000),(3,4000))","((1000,2),(3000,4))","((1,2),(3,4))","((1,2),(300,400))","((1,2),(3000,4000))","((222,1222),(44,45))"}',
'{100, 100, 100, 99, 96, 100, 100, 99, 96, 1, 99, 1}');
DO $x$
DECLARE
r record;
r2 record;
cond text;
idx_ctids tid[];
ss_ctids tid[];
count int;
plan_ok bool;
plan_line text;
BEGIN
FOR r IN SELECT colname, oper, typ, value[ordinality], matches[ordinality] FROM brinopers, unnest(op) WITH ORDINALITY AS oper LOOP
-- prepare the condition
IF r.value IS NULL THEN
cond := format('%I %s %L', r.colname, r.oper, r.value);
ELSE
cond := format('%I %s %L::%s', r.colname, r.oper, r.value, r.typ);
END IF;
-- run the query using the brin index
SET enable_seqscan = 0;
SET enable_bitmapscan = 1;
plan_ok := false;
FOR plan_line IN EXECUTE format($y$EXPLAIN SELECT array_agg(ctid) FROM brintest WHERE %s $y$, cond) LOOP
IF plan_line LIKE '%Bitmap Heap Scan on brintest%' THEN
plan_ok := true;
END IF;
END LOOP;
IF NOT plan_ok THEN
RAISE WARNING 'did not get bitmap indexscan plan for %', r;
END IF;
EXECUTE format($y$SELECT array_agg(ctid) FROM brintest WHERE %s $y$, cond)
INTO idx_ctids;
-- run the query using a seqscan
SET enable_seqscan = 1;
SET enable_bitmapscan = 0;
plan_ok := false;
FOR plan_line IN EXECUTE format($y$EXPLAIN SELECT array_agg(ctid) FROM brintest WHERE %s $y$, cond) LOOP
IF plan_line LIKE '%Seq Scan on brintest%' THEN
plan_ok := true;
END IF;
END LOOP;
IF NOT plan_ok THEN
RAISE WARNING 'did not get seqscan plan for %', r;
END IF;
EXECUTE format($y$SELECT array_agg(ctid) FROM brintest WHERE %s $y$, cond)
INTO ss_ctids;
-- make sure both return the same results
count := array_length(idx_ctids, 1);
IF NOT (count = array_length(ss_ctids, 1) AND
idx_ctids @> ss_ctids AND
idx_ctids <@ ss_ctids) THEN
-- report the results of each scan to make the differences obvious
RAISE WARNING 'something not right in %: count %', r, count;
SET enable_seqscan = 1;
SET enable_bitmapscan = 0;
FOR r2 IN EXECUTE 'SELECT ' || r.colname || ' FROM brintest WHERE ' || cond LOOP
RAISE NOTICE 'seqscan: %', r2;
END LOOP;
SET enable_seqscan = 0;
SET enable_bitmapscan = 1;
FOR r2 IN EXECUTE 'SELECT ' || r.colname || ' FROM brintest WHERE ' || cond LOOP
RAISE NOTICE 'bitmapscan: %', r2;
END LOOP;
END IF;
-- make sure we found expected number of matches
IF count != r.matches THEN RAISE WARNING 'unexpected number of results % for %', count, r; END IF;
END LOOP;
END;
$x$;
RESET enable_seqscan;
RESET enable_bitmapscan;
INSERT INTO brintest SELECT
repeat(stringu1, 42)::bytea,
substr(stringu1, 1, 1)::"char",
stringu1::name, 142857 * tenthous,
thousand,
twothousand,
repeat(stringu1, 42),
unique1::oid,
format('(%s,%s)', tenthous, twenty)::tid,
(four + 1.0)/(hundred+1),
odd::float8 / (tenthous + 1),
format('%s:00:%s:00:%s:00', to_hex(odd), to_hex(even), to_hex(hundred))::macaddr,
inet '10.2.3.4' + tenthous,
cidr '10.2.3/24' + tenthous,
substr(stringu1, 1, 1)::bpchar,
date '1995-08-15' + tenthous,
time '01:20:30' + thousand * interval '18.5 second',
timestamp '1942-07-23 03:05:09' + tenthous * interval '36.38 hours',
timestamptz '1972-10-10 03:00' + thousand * interval '1 hour',
justify_days(justify_hours(tenthous * interval '12 minutes')),
timetz '01:30:20' + hundred * interval '15 seconds',
thousand::bit(10),
tenthous::bit(16)::varbit,
tenthous::numeric(36,30) * fivethous * even / (hundred + 1),
format('%s%s-%s-%s-%s-%s%s%s', to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'), to_char(tenthous, 'FM0000'))::uuid,
int4range(thousand, twothousand),
format('%s/%s%s', odd, even, tenthous)::pg_lsn,
box(point(odd, even), point(thousand, twothousand))
FROM tenk1 ORDER BY unique2 LIMIT 5 OFFSET 5;
SELECT brin_desummarize_range('brinidx', 0);
VACUUM brintest; -- force a summarization cycle in brinidx
UPDATE brintest SET int8col = int8col * int4col;
UPDATE brintest SET textcol = '' WHERE textcol IS NOT NULL;
-- Tests for brin_summarize_new_values
SELECT brin_summarize_new_values('brintest'); -- error, not an index
SELECT brin_summarize_new_values('tenk1_unique1'); -- error, not a BRIN index
SELECT brin_summarize_new_values('brinidx'); -- ok, no change expected
-- Tests for brin_desummarize_range
SELECT brin_desummarize_range('brinidx', -1); -- error, invalid range
SELECT brin_desummarize_range('brinidx', 0);
SELECT brin_desummarize_range('brinidx', 0);
SELECT brin_desummarize_range('brinidx', 100000000);
-- Test brin_summarize_range
CREATE TABLE brin_summarize (
value int
) WITH (fillfactor=10, autovacuum_enabled=false);
CREATE INDEX brin_summarize_idx ON brin_summarize USING brin (value) WITH (pages_per_range=2);
-- Fill a few pages
DO $$
DECLARE curtid tid;
BEGIN
LOOP
INSERT INTO brin_summarize VALUES (1) RETURNING ctid INTO curtid;
EXIT WHEN curtid > tid '(2, 0)';
END LOOP;
END;
$$;
-- summarize one range
SELECT brin_summarize_range('brin_summarize_idx', 0);
-- nothing: already summarized
SELECT brin_summarize_range('brin_summarize_idx', 1);
-- summarize one range
SELECT brin_summarize_range('brin_summarize_idx', 2);
-- nothing: page doesn't exist in table
SELECT brin_summarize_range('brin_summarize_idx', 4294967295);
-- invalid block number values
SELECT brin_summarize_range('brin_summarize_idx', -1);
SELECT brin_summarize_range('brin_summarize_idx', 4294967296);
-- test value merging in add_value
CREATE TABLE brintest_2 (n numrange);
CREATE INDEX brinidx_2 ON brintest_2 USING brin (n);
INSERT INTO brintest_2 VALUES ('empty');
INSERT INTO brintest_2 VALUES (numrange(0, 2^1000::numeric));
INSERT INTO brintest_2 VALUES ('(-1, 0)');
SELECT brin_desummarize_range('brinidx', 0);
SELECT brin_summarize_range('brinidx', 0);
DROP TABLE brintest_2;
-- test brin cost estimates behave sanely based on correlation of values
CREATE TABLE brin_test (a INT, b INT);
INSERT INTO brin_test SELECT x/100,x%100 FROM generate_series(1,10000) x(x);
CREATE INDEX brin_test_a_idx ON brin_test USING brin (a) WITH (pages_per_range = 2);
CREATE INDEX brin_test_b_idx ON brin_test USING brin (b) WITH (pages_per_range = 2);
VACUUM ANALYZE brin_test;
-- Ensure brin index is used when columns are perfectly correlated
EXPLAIN (COSTS OFF) SELECT * FROM brin_test WHERE a = 1;
-- Ensure brin index is not used when values are not correlated
EXPLAIN (COSTS OFF) SELECT * FROM brin_test WHERE b = 1;
-- make sure data are properly de-toasted in BRIN index
CREATE TABLE brintest_3 (a text, b text, c text, d text);
-- long random strings (~2000 chars each, so ~6kB for min/max on two
-- columns) to trigger toasting
WITH rand_value AS (SELECT string_agg(fipshash(i::text),'') AS val FROM generate_series(1,60) s(i))
INSERT INTO brintest_3
SELECT val, val, val, val FROM rand_value;
CREATE INDEX brin_test_toast_idx ON brintest_3 USING brin (b, c);
DELETE FROM brintest_3;
-- We need to wait a bit for all transactions to complete, so that the
-- vacuum actually removes the TOAST rows. Creating an index concurrently
-- is a one way to achieve that, because it does exactly such wait.
CREATE INDEX CONCURRENTLY brin_test_temp_idx ON brintest_3(a);
DROP INDEX brin_test_temp_idx;
-- vacuum the table, to discard TOAST data
VACUUM brintest_3;
-- retry insert with a different random-looking (but deterministic) value
-- the value is different, and so should replace either min or max in the
-- brin summary
WITH rand_value AS (SELECT string_agg(fipshash((-i)::text),'') AS val FROM generate_series(1,60) s(i))
INSERT INTO brintest_3
SELECT val, val, val, val FROM rand_value;
-- now try some queries, accessing the brin index
SET enable_seqscan = off;
EXPLAIN (COSTS OFF)
SELECT * FROM brintest_3 WHERE b < '0';
SELECT * FROM brintest_3 WHERE b < '0';
DROP TABLE brintest_3;
RESET enable_seqscan;
-- test parallel build with immutable function.
CREATE TABLE brintest_expr (n int);
CREATE FUNCTION brintest_func() RETURNS int LANGUAGE sql IMMUTABLE RETURN 0;
BEGIN;
SET LOCAL min_parallel_table_scan_size = 0;
SET LOCAL max_parallel_maintenance_workers = 4;
CREATE INDEX brintest_expr_idx ON brintest_expr USING brin (brintest_func());
COMMIT;
DROP TABLE brintest_expr;
DROP FUNCTION brintest_func();
-- test an unlogged table, mostly to get coverage of brinbuildempty
CREATE UNLOGGED TABLE brintest_unlogged (n numrange);
CREATE INDEX brinidx_unlogged ON brintest_unlogged USING brin (n);
INSERT INTO brintest_unlogged VALUES (numrange(0, 2^1000::numeric));
DROP TABLE brintest_unlogged;
-- test that the insert optimization works if no rows end up inserted
CREATE TABLE brin_insert_optimization (a int);
INSERT INTO brin_insert_optimization VALUES (1);
CREATE INDEX brin_insert_optimization_idx ON brin_insert_optimization USING brin (a);
UPDATE brin_insert_optimization SET a = a;
REINDEX INDEX CONCURRENTLY brin_insert_optimization_idx;
DROP TABLE brin_insert_optimization;
Reference in a new issue View git blame Copy permalink