Synchronization error on computed column

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Posted on by Waed Ayyad

8,989 Super User 2025 Season 2

Hi All,

I am trying to add new computed field to standard data entity, what I want to return to this field NO or Yes based on if current record has data in related table (I want to do select statement to find if current record has related data and return yes or no based on it . I am truing this but synchronization issue appear

return SysComputedColumn::if(
SysComputedColumn::isNotNullExpression(expression),
SysComputedColumn::returnLiteral(NoYes::Yes),
SysComputedColumn::returnLiteral(NoYes::No));

expression contain sql statement to check if it has data in the related table.

Any hint?

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Answers (2)

André Arnaud de Cal... 300,188 Super User 2025 Season 2 on at

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RE: Computed table vs virtual table

Hi Waed,

What is the exact error and when does this appear?

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huijij 19,811 on at

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RE: Computed table vs virtual table

Hi,

As mentioned, please provide us with the more details.

Please check SysComputedColumn class in MS document:

learn.microsoft.com/.../gg945162(v=ax.60)

And the method isNotNullExpression() is not mentioned in the class.

Nevertheless, it is recommended that you split the 3 expressions in if condition, and then debug to see the root cause of the error.

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Waed Ayyad 8,989 Super User 2025 Season 2 on at

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RE: Synchronization error on computed column

Hi Andre,

this is the error and appear when I am trying to build and sync code

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Waed Ayyad 8,989 Super User 2025 Season 2 on at

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RE: Synchronization error on computed column

Hi Judy,

Can I debug it? I tried to export data and put break points, but the debugger did not hit. Any hints?

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Martin Dráb 236,970 Most Valuable Professional on at

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RE: Synchronization error on computed column

It would help if you shared all your code and the result of the method. The problem is likely caused by what you have in the expression, which you told nothing about.

But from what I know, your code looks logically wrong to me. The expression DirPartyView.RoleType = 1 will never return NULL, will it?

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Mariano Gracia on at

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RE: Synchronization error on computed column

Write a simple runnable class, call the method and print the result in a screen, in the end is a string with the SQL syntax that will be added into the entity, which is a view in SQL, I do it each time I have to write a computed column, execute the query in SQL management studio (take notice that you'll have to add the query to the underneath sql code from the view), this way you'll see where is the error, fix it and then you'll know what to do in x++

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Waed Ayyad 8,989 Super User 2025 Season 2 on at

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RE: Synchronization error on computed column

Hi Martin,

this the code that I call on Computed field:

str expression;

str roleTypeValue = SysComputedColumn::returnLiteral(DirPartyRoleType::Customer);

expression = strFmt(@"SELECT DirPartyView.RecId FROM DirPartyView

JOIN DIRPARTYTABLE on DirPartyView.PARTY = DIRPARTYTABLE.RECID

WHERE DIRPARTYTABLE.PARTYNUMBER = %1

and DirPartyView.RoleType = %2",

SysComputedColumn::returnField(tableStr(DirPartyV2Entity),

dataEntityDataSourceStr(DirPartyV2Entity, DirPartyBaseEntity), fieldStr(DirPartyV2Entity,

PartyNumber)), roleTypeValue);

return SysComputedColumn::if(

SysComputedColumn::isNotNullExpression(expression),

SysComputedColumn::returnLiteral(NoYes::Yes),

SysComputedColumn::returnLiteral(NoYes::No));

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Waed Ayyad 8,989 Super User 2025 Season 2 on at

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RE: Synchronization error on computed column

Hi Mariano,

Yes I tried it on SQL and it is working from SQL

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Martin Dráb 236,970 Most Valuable Professional on at

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RE: Synchronization error on computed column

I think it doesn't generate correct SQL code - you need to put the subquery to parentheses. For example:

str roleTypeValue = SysComputedColumn::returnLiteral(DirPartyRoleType::Customer); str expression = strFmt(@"SELECT DirPartyView.RecId FROM DirPartyView JOIN DIRPARTYTABLE on DirPartyView.PARTY = DIRPARTYTABLE.RECID WHERE DIRPARTYTABLE.PARTYNUMBER = %1 and DirPartyView.RoleType = %2", SysComputedColumn::returnField(tableStr(DirPartyV2Entity), dataEntityDataSourceStr(DirPartyV2Entity, DirPartyBaseEntity), fieldStr(DirPartyV2Entity, PartyNumber)), roleTypeValue); return SysComputedColumn::if( SysComputedColumn::isNotNullExpression(strFmt('(%1)', expression)), SysComputedColumn::returnLiteral(NoYes::Yes), SysComputedColumn::returnLiteral(NoYes::No));

By they way, please use Insert > Code to paste code to this forum (as I did).

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