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authorAlvaro Herrera <alvherre@alvh.no-ip.org>2016-11-24 15:39:55 -0300
committerAlvaro Herrera <alvherre@alvh.no-ip.org>2016-11-24 15:39:55 -0300
commit7816d13563b74379c9db618e46883c6db5fc0680 (patch)
tree0bbdb718da67abb6f55669689f56dc0ec8ad4874 /src/tutorial/basics.source
parente0375d77b691f6cab70934c63d3212a4713f66df (diff)
downloadpostgresql-7816d13563b74379c9db618e46883c6db5fc0680.tar.gz
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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
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