DescribeQuery (children 1)
 TableExpression (children 1)
  Subquery (children 1)
   SelectWithUnionQuery (children 1)
    ExpressionList (children 1)
     SelectQuery (children 2)
      ExpressionList (children 1)
       Asterisk
      TablesInSelectQuery (children 3)
       TablesInSelectQueryElement (children 1)
        TableExpression (children 1)
         TableIdentifier test_table_join_1 (alias t1)
       TablesInSelectQueryElement (children 2)
        TableExpression (children 1)
         TableIdentifier test_table_join_2 (alias t2)
        TableJoin (children 1)
         ExpressionList (children 2)
          Identifier id
          Identifier value
       TablesInSelectQueryElement (children 2)
        TableExpression (children 1)
         TableIdentifier test_table_join_3 (alias t3)
        TableJoin (children 1)
         ExpressionList (children 2)
          Identifier id
          Identifier value