=?UTF-8?B?0JDQvdC00YDQtdC5?= <andyk@xxxxxxxxxxxxxx> writes: > In what way can I determine is the table system? ODBC driver does it > by checking table name's prefix: if it begins with 'pg_' - driver > desides that the table is system, but that's a bad idea. Yup, that's been incorrect since PG 7.3. The proper test is whether the table is in the pg_catalog schema. Depending on your purposes you might also want to exclude pg_toast. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match