SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function mapAdd (children 1)
     ExpressionList (children 2)
      Function map (children 1)
       ExpressionList (children 2)
        Function toUInt64 (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
        Function toInt32 (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
      Identifier m
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
