40 lines
1.2 KiB
Plaintext
40 lines
1.2 KiB
Plaintext
--
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-- Commit Timestamp
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--
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SHOW track_commit_timestamp;
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track_commit_timestamp
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------------------------
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on
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(1 row)
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CREATE TABLE committs_test(id serial, ts timestamptz default now());
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INSERT INTO committs_test DEFAULT VALUES;
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INSERT INTO committs_test DEFAULT VALUES;
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INSERT INTO committs_test DEFAULT VALUES;
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SELECT id,
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pg_xact_commit_timestamp(xmin) >= ts,
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pg_xact_commit_timestamp(xmin) < now(),
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pg_xact_commit_timestamp(xmin) - ts < '60s' -- 60s should give a lot of reserve
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FROM committs_test
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ORDER BY id;
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id | ?column? | ?column? | ?column?
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----+----------+----------+----------
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1 | t | t | t
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2 | t | t | t
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3 | t | t | t
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(3 rows)
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DROP TABLE committs_test;
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SELECT pg_xact_commit_timestamp('0'::xid);
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ERROR: cannot retrieve commit timestamp for transaction 0
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SELECT pg_xact_commit_timestamp('1'::xid);
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ERROR: cannot retrieve commit timestamp for transaction 1
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SELECT pg_xact_commit_timestamp('2'::xid);
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ERROR: cannot retrieve commit timestamp for transaction 2
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SELECT x.xid::text::bigint > 0, x.timestamp > '-infinity'::timestamptz, x.timestamp < now() FROM pg_last_committed_xact() x;
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?column? | ?column? | ?column?
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----------+----------+----------
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t | t | t
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(1 row)
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