SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 7)
   ExpressionList (children 1)
    Literal Array_[Float64_1, Float64_0] (alias reference_vec)
   ExpressionList (children 2)
    Identifier id
    Identifier attr1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
   Function greaterOrEquals (children 1)
    ExpressionList (children 2)
     Identifier attr1
     Literal UInt64_50
   ExpressionList (children 1)
    OrderByElement (children 1)
     Function L2Distance (children 1)
      ExpressionList (children 2)
       Identifier vec
       Identifier reference_vec
   Literal UInt64_5
   Set
