29 lines
658 B
RPMSpec
29 lines
658 B
RPMSpec
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# CREATE TRIGGER - Add trigger with concurrent reads
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#
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# CREATE TRIGGER uses ShareRowExclusiveLock so we mix writes with it
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# to see what works or waits.
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setup
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{
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CREATE TABLE a (i int);
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CREATE FUNCTION f() RETURNS TRIGGER LANGUAGE plpgsql AS 'BEGIN RETURN NULL; END;';
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INSERT INTO a VALUES (0), (1), (2), (3);
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}
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teardown
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{
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DROP TABLE a;
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DROP FUNCTION f();
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}
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session "s1"
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step "s1a" { BEGIN; }
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step "s1b" { CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); }
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step "s1c" { COMMIT; }
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session "s2"
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step "s2a" { BEGIN; }
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step "s2b" { SELECT * FROM a WHERE i = 1 FOR UPDATE; }
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step "s2c" { UPDATE a SET i = 4 WHERE i = 3; }
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step "s2d" { COMMIT; }
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