Microsoft Dynamics AX (Archived)

Link type : Active , Delay and Passive

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Posted on by @rp@n

Dear All,

I read in blog but i not understand difference between Active and Delay

Active

Active link type update the child data sources without any delay when you select the parent table record. When you deal with more records it will be affect application performance.

Delay

Delay form data source link type is also same as active method the different is delay method won't update immediately when you select the parent record.
It will update the child data source when you select the parent table, Ax use pause statement before update the child data source.
For example, if we are dealing with lot of records so, when the user click or scroll the order, order details will update without any delay if we use active method.

So, We can use delay method because of performance improvement.

Can you please explain why link type ACTIVE will effect application performance issue and link type DELAY is NOT?

Please give me more shed on this.

Thanks!

Arpan

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Martin Dráb 237,801 Most Valuable Professional on at

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If you quickly switch between ten records, Active link will execute ten database queries; one for every record you active. A delayed link will wait until you pause at the last record and execute the query just for this one. Execution many queries that you don't actually need obviously has a negative impact on performance.

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@rp@n 30 on at

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Thanks a lot Martin,

Passive

Passive form data source link type won't update the child data source automatically.
For example if we select the parent table order then order details child data source won't update. If we need to update the child data source we need to call the child data source execute query method by program (code).

Form > Parent Table >Active() : ChildTable_ds.executeQuery()

Is't correct ? If yes then what is the use of link type : Passive ?

Please give me more shed on this.

Arpan

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Rohin 4,624 on at

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I believe that: Passive form data source link type won't update the child data source immediately(not "automatically" , you used). It updates but after a delay like Martin suggested above

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Martin Dráb 237,801 Most Valuable Professional on at

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Obviously, you'll use a passive link if you don't want the query to execute automatically for whatever reason.

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@rp@n 30 on at

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Thanks Visvash,

So, we no need to write code

Form > Parent Table >Active() : ChildTable_ds.executeQuery() right?

Please give me more shed on this.

Arpan

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Rohin 4,624 on at

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I don't believe so. If you want to perform any specific action while selecting parent record , you may call .

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@rp@n 30 on at

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I mean to say for Specific Link type : Passive.

Code is required or not ? In some blog i saw it's require.

Please give me more shed on this.

Arpan

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Rohin 4,624 on at

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Apologize Arpan,

I was suggesting you about Delayed link type(as your thread title says) . For passive Like Martin says "you'll use a passive link if you don't want the query to execute automatically for whatever reason." so you have to call your executequery method

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@rp@n 30 on at

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Thanks Visvash

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