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# Soft deadlock requiring reversal of multiple wait-edges. s1 must
# jump over both s3 and s4 and acquire the lock on a2 immediately,
# since s3 and s4 are hard-blocked on a1.
setup
{
CREATE TABLE a1 ();
CREATE TABLE a2 ();
}
teardown
{
DROP TABLE a1, a2;
}
session s1
setup { BEGIN; SET deadlock_timeout = '10ms'; }
step s1a { LOCK TABLE a1 IN SHARE UPDATE EXCLUSIVE MODE; }
step s1b { LOCK TABLE a2 IN SHARE UPDATE EXCLUSIVE MODE; }
step s1c { COMMIT; }
session s2
setup { BEGIN; SET deadlock_timeout = '100s'; }
step s2a { LOCK TABLE a2 IN ACCESS SHARE MODE; }
step s2b { LOCK TABLE a1 IN SHARE UPDATE EXCLUSIVE MODE; }
step s2c { COMMIT; }
session s3
setup { BEGIN; SET deadlock_timeout = '100s'; }
step s3a { LOCK TABLE a2 IN ACCESS EXCLUSIVE MODE; }
step s3c { COMMIT; }
session s4
setup { BEGIN; SET deadlock_timeout = '100s'; }
step s4a { LOCK TABLE a2 IN ACCESS EXCLUSIVE MODE; }
step s4c { COMMIT; }
# The expected output for this test assumes that isolationtester will
# detect step s1b as waiting before the deadlock detector runs and
# releases s1 from its blocked state. To ensure that happens even in
# very slow (CLOBBER_CACHE_ALWAYS) cases, apply a (*) annotation.
permutation s1a s2a s2b s3a s4a s1b(*) s1c s2c s3c s4c
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