SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 6)
    Function quantile (alias qa) (children 1)
     ExpressionList (children 1)
      Identifier a
    Function quantile (alias qb) (children 1)
     ExpressionList (children 1)
      Identifier b
    Function quantile (alias qc) (children 1)
     ExpressionList (children 1)
      Identifier c
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier qa
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier qb
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier qc
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier decimal
   Function less (children 1)
    ExpressionList (children 2)
     Identifier a
     Literal UInt64_0