Adding link between three tables using Query class

Dynamics 365 for Finance and Operations/AX Developer Forum
1

Hi,

Hope you are doing well!

Kindly go through the below given SQL in order to understand my query

Select TabA
Where TabA.col1 == ‘xyz’
Join TabB
Where TabA.col1 == TabB.col1 &&
TabA.col2 != TabB.col2
join TabC
Where TabA.col1 == TabC.col1;

I did not find any way using addlink() method to achieve relation

TabA.col1 == TabB.col1 &&
TabA.col2 != TabB.col2

and

TabA.col1 == TabC.col1

I would appreciate any help you may offer.

Regards,

Abhinay

2

Edited:

the where clause for TabC is:

Where TabA.col3 == TabC.col3;

3

Example:

qbdsTabC = qbdsTabA.addDataSource(tableNum(TabC));
qbdsTabC.addLink(fieldNum(TabA, Col1), fieldNum(TabC, Col1));

You didn’t show your code, so I have no idea what you’re doing there. Ensure yourself that you link TabC to TabA and not to TabB.

4

Hi Martin,

The code is

qbdsTabB = qbdsTabA.addDataSource(tableNum(TabB));
qbdsTabB.relations(true);
qbdsTabB.addLink(fieldNum(TabA, Col1), fieldNum(TabB, Col1));
//(nocode for TabA.col2 != TabB.col2)

The moment I say

qbdsTabC = qbdsTabA.addDataSource(tableNum(TabC));
qbdsTabC.addLink(fieldNum(TabA, Col1), fieldNum(TabC, Col1));

the relation between TabA and TabB vanishes from qbdsTabA.

5

I don’t see anything wrong. I guess you’re verifying the result by QueryBuildDataSource.toString(), not by running the query. To see both child data sources there, you have to call fetchMode(QueryFetchMode::One2One) on both.