SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier 03173_multiple_partition_cols
   Function in (children 1)
    ExpressionList (children 2)
     Identifier key2
     Literal UInt64_4
   Set
