Fix check for database version inside pg_upgrade.

Due to recent project renaming, gpupgrade now failing to upgarde greenplum 6 to cloudberry. The issue is with check-database-version logic. Fix is kinda straightforward, the only issue is with dbstring2 variable name, as i cannot came up with anything better.

Author: reshke

src/bin/pg_upgrade/exec.c

@@ -36,7 +36,8 @@ get_bin_version(ClusterInfo *cluster)
 {
 	char		cmd[MAXPGPATH],
 				cmd_output[MAX_STRING],
-				dbstring[MAX_STRING];
+				dbstring[MAX_STRING],
+				dbstring2[MAX_STRING];
 
 	FILE	   *output;
 	int			v1 = 0,
@@ -51,11 +52,12 @@ get_bin_version(ClusterInfo *cluster)
 
 	pclose(output);
 
-	if (sscanf(cmd_output, "%*s (%s Database) %d.%d", dbstring, &v1, &v2) < 1)
+	if (sscanf(cmd_output, "%*s (%s %s) %d.%d", dbstring, dbstring2, &v1, &v2) < 1)
 		pg_fatal("could not get pg_ctl version output from %s\n", cmd);
 
-	if (strcmp("Greenplum", dbstring) && strcmp("Cloudberry", dbstring))
-		pg_fatal("could not upgrade from non Greenplum/Cloudberry version: %s\n", dbstring);
+	if ((strcmp("Greenplum", dbstring) == 0 && strcmp("Database", dbstring2) == 0) \
+				|| (strcmp("Apache", dbstring2) == 0 && strcmp("Cloudberry", dbstring2) == 0))
+		pg_fatal("could not upgrade from non Greenplum/Cloudberry version: %s %s\n", dbstring, dbstring2);
 
 	if (v1 < 10)
 	{