SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_partial_index
   Function or (children 1)
    ExpressionList (children 2)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier region
       Literal \'asia\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier user_id
       Literal UInt64_101
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier ALL
   Set
