SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 1)
    Function CAST (alias reference_vec) (children 1)
     ExpressionList (children 2)
      Literal Array_[Float64_0, Float64_2]
      Literal \'Array(BFloat16)\'
   ExpressionList (children 2)
    Identifier id
    Function L2Distance (children 1)
     ExpressionList (children 2)
      Identifier vec
      Identifier reference_vec
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab_f32
   ExpressionList (children 1)
    OrderByElement (children 1)
     Function L2Distance (children 1)
      ExpressionList (children 2)
       Identifier vec
       Identifier reference_vec
   Literal UInt64_4
