46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
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# Force usage of ondisk decoding snapshots to test that code path.
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setup
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{
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DROP TABLE IF EXISTS do_write;
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CREATE TABLE do_write(id serial primary key);
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}
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teardown
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{
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DROP TABLE do_write;
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SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
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}
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session "s1"
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setup { SET synchronous_commit=on; }
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step "s1init" {SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');}
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step "s1start" {SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');}
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step "s1insert" { INSERT INTO do_write DEFAULT VALUES; }
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step "s1checkpoint" { CHECKPOINT; }
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step "s1alter" { ALTER TABLE do_write ADD COLUMN addedbys1 int; }
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session "s2"
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setup { SET synchronous_commit=on; }
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step "s2b" { BEGIN; }
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step "s2txid" { SELECT pg_current_xact_id() IS NULL; }
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step "s2alter" { ALTER TABLE do_write ADD COLUMN addedbys2 int; }
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step "s2c" { COMMIT; }
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session "s3"
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setup { SET synchronous_commit=on; }
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step "s3b" { BEGIN; }
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step "s3txid" { SELECT pg_current_xact_id() IS NULL; }
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step "s3c" { COMMIT; }
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# Force usage of ondisk snapshot by starting and not finishing a
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# transaction with an assigned xid after consistency has been
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# reached. In combination with a checkpoint forcing a snapshot to be
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# written and a new restart point computed that'll lead to the usage
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# of the snapshot.
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permutation "s2b" "s2txid" "s1init" "s3b" "s3txid" "s2alter" "s2c" "s2b" "s2txid" "s3c" "s2c" "s1insert" "s1checkpoint" "s1start" "s1insert" "s1alter" "s1insert" "s1start"
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