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Add a regression test for snapshot too old with hash indexes. 

Amit Kapila, but I changed the comment not to be a copy-and-paste of
an existing one, and instead referred to it.

Discussion: http://postgr.es/m/CAA4eK1K0UJswCRf81WwJFO4H=+ZvbmKTNhAps-NkdmHRsq1GnQ@mail.gmail.com
This commit is contained in:
Robert Haas 2017-03-15 10:46:13 -04:00
parent d8f356e1bd
commit 42bdaebf16
3 changed files with 47 additions and 1 deletions
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2
src/test/modules/snapshot_too_old/Makefile
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@ -4,7 +4,7 @@
# we have to clean those result files explicitly
EXTRA_CLEAN = $(pg_regress_clean_files)
ISOLATIONCHECKS=sto_using_cursor sto_using_select
ISOLATIONCHECKS=sto_using_cursor sto_using_select sto_using_hash_index
ifdef USE_PGXS
PG_CONFIG = pg_config

15
src/test/modules/snapshot_too_old/expected/sto_using_hash_index.out Normal file
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@ -0,0 +1,15 @@
Parsed test spec with 2 sessions
starting permutation: noseq s1f1 s2sleep s2u s1f2
step noseq: SET enable_seqscan = false;
step s1f1: SELECT c FROM sto1 where c = 1000;
c
1000
step s2sleep: SELECT setting, pg_sleep(6) FROM pg_settings WHERE name = 'old_snapshot_threshold';
setting pg_sleep
0
step s2u: UPDATE sto1 SET c = 1001 WHERE c = 1000;
step s1f2: SELECT c FROM sto1 where c = 1001;
ERROR: snapshot too old

31
src/test/modules/snapshot_too_old/specs/sto_using_hash_index.spec Normal file
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@ -0,0 +1,31 @@
# This test is like sto_using_select, except that we test access via a
# hash index.
setup
{
CREATE TABLE sto1 (c int NOT NULL);
INSERT INTO sto1 SELECT generate_series(1, 1000);
CREATE INDEX idx_sto1 ON sto1 USING HASH (c);
}
setup
{
VACUUM ANALYZE sto1;
}
teardown
{
DROP TABLE sto1;
}
session "s1"
setup { BEGIN ISOLATION LEVEL REPEATABLE READ; }
step "noseq" { SET enable_seqscan = false; }
step "s1f1" { SELECT c FROM sto1 where c = 1000; }
step "s1f2" { SELECT c FROM sto1 where c = 1001; }
teardown { ROLLBACK; }
session "s2"
step "s2sleep" { SELECT setting, pg_sleep(6) FROM pg_settings WHERE name = 'old_snapshot_threshold'; }
step "s2u" { UPDATE sto1 SET c = 1001 WHERE c = 1000; }
permutation "noseq" "s1f1" "s2sleep" "s2u" "s1f2"