47 lines
1.1 KiB
Python
47 lines
1.1 KiB
Python
# index-only scan test
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#
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# This test tries to expose problems with the interaction between index-only
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# scans and SSI.
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#
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# Any overlap between the transactions must cause a serialization failure.
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setup
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{
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CREATE TABLE tabx (id int NOT NULL);
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INSERT INTO tabx SELECT generate_series(1,10000);
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ALTER TABLE tabx ADD PRIMARY KEY (id);
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CREATE TABLE taby (id int NOT NULL);
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INSERT INTO taby SELECT generate_series(1,10000);
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ALTER TABLE taby ADD PRIMARY KEY (id);
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}
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setup { VACUUM FREEZE ANALYZE tabx; }
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setup { VACUUM FREEZE ANALYZE taby; }
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teardown
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{
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DROP TABLE tabx;
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DROP TABLE taby;
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}
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session s1
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setup
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{
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BEGIN ISOLATION LEVEL SERIALIZABLE;
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SET LOCAL seq_page_cost = 0.1;
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SET LOCAL random_page_cost = 0.1;
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SET LOCAL cpu_tuple_cost = 0.03;
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}
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step rxwy1 { DELETE FROM taby WHERE id = (SELECT min(id) FROM tabx); }
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step c1 { COMMIT; }
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session s2
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setup
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{
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BEGIN ISOLATION LEVEL SERIALIZABLE;
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SET LOCAL seq_page_cost = 0.1;
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SET LOCAL random_page_cost = 0.1;
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SET LOCAL cpu_tuple_cost = 0.03;
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}
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step rywx2 { DELETE FROM tabx WHERE id = (SELECT min(id) FROM taby); }
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step c2 { COMMIT; }
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