CreateQuery check_system_tables (children 3)
 Identifier check_system_tables
 Storage definition (children 1)
  Function Join (children 1)
   ExpressionList (children 3)
    Identifier ANY
    Identifier LEFT
    Identifier number
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Asterisk
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers (children 1)
        ExpressionList (children 1)
         Literal UInt64_50
