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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/walreceiver.c
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@@ -330,7 +330,6 @@ WalReceiverMain(void)
{
char *primary_sysid;
char standby_sysid[32];
int server_version;
WalRcvStreamOptions options;
/*
@@ -338,8 +337,7 @@ WalReceiverMain(void)
* IDENTIFY_SYSTEM replication command.
*/
EnableWalRcvImmediateExit();
primary_sysid = walrcv_identify_system(wrconn, &primaryTLI,
&server_version);
primary_sysid = walrcv_identify_system(wrconn, &primaryTLI);
snprintf(standby_sysid, sizeof(standby_sysid), UINT64_FORMAT,
GetSystemIdentifier());