relaxation of the requirement for calling the old pg_catalog.ptrack_version() function

Author: kulaginm

src/ptrack.c

@@ -79,13 +79,17 @@ get_ptrack_version(PGconn *backup_conn, PGNodeInfo *nodeInfo)
 return;
 }
 
-res_db = pgut_execute(backup_conn,
+/*
+* it's ok not to have permission to call this old function in PGPRO-11 version (ok_error = true)
+* see deprication notice https://postgrespro.com/docs/postgrespro/11/release-pro-11-9-1
+*/
+res_db = pgut_execute_extended(backup_conn,
 "SELECT pg_catalog.ptrack_version()",
-0, NULL);
+0, NULL, true, true);
 if (PQntuples(res_db) == 0)
 {
-/* TODO: Something went wrong, should we error out here? */
 PQclear(res_db);
+elog(WARNING, "Can't call pg_catalog.ptrack_version(), it is assumed that there is no ptrack extension installed.");
 return;
 }
 ptrack_version_str = PQgetvalue(res_db, 0, 0);

tests/helpers/ptrack_helpers.py

@@ -312,16 +312,11 @@ def __init__(self, *args, **kwargs):
 self.ptrack = False
 if 'PG_PROBACKUP_PTRACK' in self.test_env:
 if self.test_env['PG_PROBACKUP_PTRACK'] == 'ON':
-self.ptrack = True
+if self.pg_config_version >= self.version_to_num('11.0'):
+self.ptrack = True
 
 os.environ["PGAPPNAME"] = "pg_probackup"
 
-if self.ptrack:
-self.assertGreaterEqual(
-self.pg_config_version,
-self.version_to_num('11.0'),
-"ptrack testing require PostgreSQL >= 11")
-
 @property
 def pg_config_version(self):
 return self.version_to_num(