Fix commit_ts for FrozenXid and BootstrapXid
Previously, requesting commit timestamp for transactions
FrozenTransactionId and BootstrapTransactionId resulted in an error.
But since those values can validly appear in committed tuples' Xmin,
this behavior is unhelpful and error prone: each caller would have to
special-case those values before requesting timestamp data for an Xid.
We already have a perfectly good interface for returning "the Xid you
requested is too old for us to have commit TS data for it", so let's use
that instead.
Backpatch to 9.5, where commit timestamps appeared.
Author: Craig Ringer
Discussion: https://www.postgresql.org/message-id/CAMsr+YFM5Q=+ry3mKvWEqRTxrB0iU3qUSRnS28nz6FJYtBwhJg@mail.gmail.com
Branch
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master
Details
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http://git.postgresql.org/pg/commitdiff/4aaddf2f009821e29aea3735e44332ad9ca47aaa
Modified Files
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src/backend/access/transam/commit_ts.c | 11 +++++++++--
src/test/modules/commit_ts/expected/commit_timestamp.out | 12 ++++++++++--
src/test/modules/commit_ts/expected/commit_timestamp_1.out | 12 ++++++++++--
src/test/modules/commit_ts/t/004_restart.pl | 14 ++++----------
4 files changed, 33 insertions(+), 16 deletions(-)