The method of SQL generation from BQL PXSelectGroupBy<> data views has been changed in Acumatica Framework 5.2.

The sections below illustrate the differences using the example of PXSelectGroupBy<FinYear, Aggregate<GroupBy<FinYear.finPeriods>>>.Select(graph):

Acumatica Framework 5.2 and Later

SELECT Max([finyear].[year]), 
       Max([finyear].[startdate]), 
       Max([finyear].[enddate]), 
       [finyear].[finperiods], 
       -- Attention!
       CONVERT (BIT, Max([finyear].[customperiods] + 0)),
       --
       Max([finyear].[begfinyearhist]), 
       Max([finyear].[periodsstartdatehist]), 
       Max([finyear].[noteid]), 
       ( NULL ), 
       ( NULL ), 
       ( NULL ), 
       Max([finyear].[tstamp]), 
       Max([finyear].[createdbyid]), 
       Max([finyear].[createdbyscreenid]), 
       Max([finyear].[createddatetime]), 
       Max([finyear].[lastmodifiedbyid]), 
       Max([finyear].[lastmodifiedbyscreenid]), 
       Max([finyear].[lastmodifieddatetime]) 
FROM   finyear FinYear 
WHERE  ( finyear.companyid = 2 ) 
GROUP  BY [finyear].[finperiods] 
ORDER  BY Max([finyear].[year])

Acumatica Framework 5.1 and Earlier

SELECT Max([finyear].[year]), 
       Max([finyear].[startdate]), 
       Max([finyear].[enddate]), 
       [finyear].[finperiods], 
       -- Attention!
       ( NULL ), 
       --
       Max([finyear].[begfinyearhist]), 
       Max([finyear].[periodsstartdatehist]), 
       ( NULL ), 
       ( NULL ), 
       ( NULL ), 
       Max([finyear].[tstamp]), 
       ( NULL ), 
       Max([finyear].[createdbyscreenid]), 
       Max([finyear].[createddatetime]), 
       ( NULL ), 
       Max([finyear].[lastmodifiedbyscreenid]), 
       Max([finyear].[lastmodifieddatetime]) 
FROM   finyear FinYear 
WHERE  ( finyear.companyid = 2 ) 
GROUP  BY [finyear].[finperiods] 
ORDER  BY Max([finyear].[year]) 

Explanation

By default, the Max() aggregate is applied to all fields not explicitly mentioned in a BQL statement.

However, in Acumatica 5.1 and earlier, it excludes the CreatedByID, LastModifiedByID, and bool fields. When translated into SQL, these fields will always be null unless you explicitly grouped by.

Starting from version 5.2, Max() will be applied by default for them, too.