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Add walreceiver API to get remote server version

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Add a separate walreceiver API function walrcv_server_version() to get
the version of the remote server, instead of doing it as part of
walrcv_identify_system().  This allows the server version to be
available even for uses that don't call IDENTIFY_SYSTEM, and it seems
cleaner anyway.

This is for an upcoming patch, not currently used.

Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://www.postgresql.org/message-id/20190115071359.GF1433@paquier.xyz
This commit is contained in:
Peter Eisentraut
2019-03-15 10:16:26 +01:00
parent 4e197bf195
commit 69039fda83
4 changed files with 22 additions and 16 deletions
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4
src/backend/replication/logical/worker.c
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@ -1674,7 +1674,6 @@ ApplyWorkerMain(Datum main_arg)
RepOriginId originid;
TimeLineID startpointTLI;
char *err;
int server_version;
myslotname = MySubscription->slotname;
@ -1708,8 +1707,7 @@ ApplyWorkerMain(Datum main_arg)
* We don't really use the output identify_system for anything but it
* does some initializations on the upstream so let's still call it.
*/
(void) walrcv_identify_system(wrconn, &startpointTLI,
&server_version);
(void) walrcv_identify_system(wrconn, &startpointTLI);
}