I  keep seeing  <INVALID OREF>zMypropertyGetSwizzled+3^myClass.2  in the error log.  In my case,  Myproperty   is a property of  myClass. And Myproperty points to the the object of other class in the system. This error happens to 2 properties in the same class, and they are both object properties. This error pops up occasionally, and make the debugging harder.

Anyone knows what the issues are?

TIA

Recently I have encounter an issue to get the columns out from a query without execute it.

For example:

I have a Query looks like below. How can I get the 'col1,col2,col3,col4' or the text of the query("select col1,col2,col3,col4 from mytable") back?

Query myquery() As %SQLQuery(CONTAINID = 0) [ SqlProc ]
{
 SELECT col1, col2, col3,col4
 FROM  mytable
 }