how to access CallingStationId and CalledStationId propertes in diaup.conf (sql.conf) in a SQL query

Dear ALL I use this query by calling stored procedure in database : simul_count_query = "SELECT findout_cuncurrent_sessions_for_a_user('%{User-Name}','%{NAS-IP-Address}','%{CalledStationId}','%{CallingStationId}')" but I can not access to the value of CallingStationId and CalledStationId. my radius.log file : rlm_sql_postgresql: query: SELECT findout_cuncurrent_sessions_for_a_user('test1','5.190.103.4','','') rlm_sql_postgresql: Status: PGRES_FATAL_ERROR rlm_sql_postgresql: Error invalid input syntax for type inet: "" rlm_sql_postgresql: Postgresql Fatal Error: [22P02: INVALID TEXT REPRESENTATION] Occurred!! rlm_sql (sql) sql_checksimul: Database query failed