to simplify part of that.. multi-row queries must have the same structure on 
each row (the same checked fields)


--

Steven Green
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"Bernie van't Hof"  wrote in message 
news:5b1fddff$1@pnews.thedbcommunity.com...

I've been going around in circles a bit due to lack of rules for handling 
self-joins and also multi-row queries.

Does the below make sense and seem reasonable without being too restrictive?

/**
  * a table in a query:
  *   must have at least one row. Each row is TYPE_INSERT, TYPE_DELETE, 
TYPE_DISPLAY, TYPE_UPDATE or TYPE_NONE
  *   has zero or more rows of TYPE_NONE
  *   has zero or more rows of one only type other than TYPE_NONE
  *   containing TYPE_NONE and another type is a self-join
  * within a table:
  *   rows of same type must have join links in the same columns
  *   TYPE_DISPLAY rows must have checks in the same columns
  *   TYPE_INSERT and TYPE_UPDATE rows must use the same destination columns
  */

On 12/6/18 9:11 am, Michael Kennedy wrote:
> On 11/06/2018 19:55, Bernie van't Hof wrote:
>> Just to let you know I havn't gone away. This discussion prompted a lot 
>> of rethink. Still plugging away.
>
> Good!!
>
> Sounds like some real nasty ones are... gestating...  ;-)
>