SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 6)
   ExpressionList (children 1)
    Literal Array_[Float64_1, Float64_2] (alias reference_vec)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
   Function less (children 1)
    ExpressionList (children 2)
     Identifier id
     Literal UInt64_5000
   ExpressionList (children 1)
    OrderByElement (children 1)
     Function cosineDistance (children 1)
      ExpressionList (children 2)
       Identifier vec
       Identifier reference_vec
   Literal UInt64_10
 Identifier Null
