do not dump generated fields (#19)

Author: r3nic1e

table.go

@@ -81,7 +81,7 @@ FROM INFORMATION_SCHEMA.TABLES as t
 JOIN (
     SELECT c.TABLE_NAME as table, ARRAY_AGG(c.COLUMN_NAME) as columns
     FROM INFORMATION_SCHEMA.COLUMNS AS c
-    WHERE c.TABLE_CATALOG = '' AND c.TABLE_SCHEMA = ''
+    WHERE c.TABLE_CATALOG = '' AND c.TABLE_SCHEMA = '' AND c.IS_GENERATED = 'NEVER'
     GROUP BY c.TABLE_NAME
 ) as c
 ON t.TABLE_NAME = c.table