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| author | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2014-12-03 11:53:02 -0300 |
|---|---|---|
| committer | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2014-12-03 11:53:02 -0300 |
| commit | 73c986adde5d73a5e2555da9b5c8facedb146dcd (patch) | |
| tree | 29ee4f6c800c3614cfd3316c7026e30e552e12a4 /src/include/utils/builtins.h | |
| parent | 6597ec9be6a9ed50390f73235d6654ec32a0b944 (diff) | |
Keep track of transaction commit timestamps
Transactions can now set their commit timestamp directly as they commit,
or an external transaction commit timestamp can be fed from an outside
system using the new function TransactionTreeSetCommitTsData(). This
data is crash-safe, and truncated at Xid freeze point, same as pg_clog.
This module is disabled by default because it causes a performance hit,
but can be enabled in postgresql.conf requiring only a server restart.
A new test in src/test/modules is included.
Catalog version bumped due to the new subdirectory within PGDATA and a
couple of new SQL functions.
Authors: Álvaro Herrera and Petr Jelínek
Reviewed to varying degrees by Michael Paquier, Andres Freund, Robert
Haas, Amit Kapila, Fujii Masao, Jaime Casanova, Simon Riggs, Steven
Singer, Peter Eisentraut
Diffstat (limited to 'src/include/utils/builtins.h')
| -rw-r--r-- | src/include/utils/builtins.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/utils/builtins.h b/src/include/utils/builtins.h index 417fd1771a8..565cff3e0d2 100644 --- a/src/include/utils/builtins.h +++ b/src/include/utils/builtins.h @@ -1187,6 +1187,10 @@ extern Datum pg_prepared_xact(PG_FUNCTION_ARGS); /* access/transam/multixact.c */ extern Datum pg_get_multixact_members(PG_FUNCTION_ARGS); +/* access/transam/committs.c */ +extern Datum pg_xact_commit_timestamp(PG_FUNCTION_ARGS); +extern Datum pg_last_committed_xact(PG_FUNCTION_ARGS); + /* catalogs/dependency.c */ extern Datum pg_describe_object(PG_FUNCTION_ARGS); extern Datum pg_identify_object(PG_FUNCTION_ARGS); |