Explain EXPLAIN SYNTAX (children 2)
 Set
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 4)
    ExpressionList (children 2)
     Identifier id
     Identifier payload
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier tab
    Function equals (children 1)
     ExpressionList (children 2)
      Function dictGetUUID (children 1)
       ExpressionList (children 3)
        Literal \'dictionary_all\'
        Literal \'uid\'
        Identifier id
      Function toUUID (children 1)
       ExpressionList (children 1)
        Literal \'00000000-0000-0000-0000-000000000001\'
    ExpressionList (children 2)
     OrderByElement (children 1)
      Identifier id
     OrderByElement (children 1)
      Identifier payload
