psql: Report full protocol version in \conninfo output.

MasaoFujii · MasaoFujii · commit be37ac20fc23 · 2025-06-14T10:37:12.000+09:00
Commit bba2fbc modified \conninfo to display the protocol version used by the current connection, but it only showed the major version (e.g., 3). This commit updates \conninfo to display the full protocol version (e.g., 3.2). Since support for new version 3.2 was added in v18, and the server supports both 3.0 and 3.2, showing the complete version helps users understand exactly which protocol version the current session is using. Although this is a minor behavior change, it's considered a fix for an oversight in the original patch and is included in v18. Author: Fujii Masao <masao.fujii@gmail.com> Reviewed-by: David G. Johnston <david.g.johnston@gmail.com> Discussion: https://postgr.es/m/685961b8-b6ce-40bb-b2d5-c2ff135d3388@oss.nttdata.com
diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c
@@ -778,6 +778,7 @@ exec_command_conninfo(PsqlScanState scan_state, bool active_branch)
 	int			ssl_in_use,
 				password_used,
 				gssapi_used;
+	int			version_num;
 	char	   *paramval;
 
 	if (!active_branch)
@@ -793,7 +794,9 @@ exec_command_conninfo(PsqlScanState scan_state, bool active_branch)
 	/* Get values for the parameters */
 	host = PQhost(pset.db);
 	hostaddr = PQhostaddr(pset.db);
-	protocol_version = psprintf("%d", PQprotocolVersion(pset.db));
+	version_num = PQfullProtocolVersion(pset.db);
+	protocol_version = psprintf("%d.%d", version_num / 10000,
+								version_num % 10000);
 	ssl_in_use = PQsslInUse(pset.db);
 	password_used = PQconnectionUsedPassword(pset.db);
 	gssapi_used = PQconnectionUsedGSSAPI(pset.db);
