topic Re: Talend TMAP not behaving with variable expressions in Talend Studio

Talend TMAP not behaving with variable expressions

DonMcCarty — Fri, 15 Nov 2024 23:00:38 GMT

I've just installed Talend OpenSource in a new instance.

I'm using a licensed version at work and wanted to explore some other uses personally.

TMAP in my paid version is behaving differently than in my free version.

First thing I noticed was my variables are not listed by name, but instead by expression.

Free Version

And a similar example on my paid version

Further, references to any variable in the TMAP expression build do not work on the free version

YET when I put this code in place and run the job, everything works EXACTLY AS EXPECTED.

Any help in understanding what could cause this odd TMAP bahvior would be greatly appreciated.

Re: Talend TMAP not behaving with variable expressions

Anonymous — Mon, 18 Apr 2022 05:01:06 GMT

The Var/Value table list the expression might be used in your expression field, take a look at the Testing expressions in the tMap component part in this page to know more information about this function.

I hardly ever use this button because it's just for testing simple functions, not executing an entire job.

Regards

Shong

Re: Talend TMAP not behaving with variable expressions

Anonymous — Mon, 18 Apr 2022 07:17:09 GMT

Looking for the same issue. Bumped into your thread. Thanks for creating it. Looking forward for solution.

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Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Tue, 19 Apr 2022 22:37:03 GMT

Thank you for your reply Shong.

I'm not sure if I understand your response when considering my question.

My issue is that Talend Studio paid version is behaving very differently than Talen Studio Open Source in this space.

Agree testing is for simply expressions.

HOWEVER, what is being displayed is just wrong AND the testing button simply does not work.

This renders a portion of the TMAP functionality unusable.

Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Tue, 19 Apr 2022 22:37:40 GMT

I can't believe this is the case - I'm 5 minutes into trying out the Open Source option and find a gross difference between the two.

What other issues await me as I get deeper into it?

Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Tue, 19 Apr 2022 22:39:23 GMT

Not sure if Shong is responding officially.

But such drastically different behavior will limit the adoption of this tool in any organization.

The entire business model is to trial and prototype with the open-source, get developers dependent on it, and then only be able to put it into production with a license.

If the entry point, the open-source version of the product, does not provide a good experience the trial for the tool ends there.

Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Wed, 20 Apr 2022 01:51:37 GMT

I thought version 8 might contain the problem so I downgraded to v 7.4.

Unfortunately - this was not helpful and produces the same problem.

Re: Talend TMAP not behaving with variable expressions

Anonymous — Wed, 20 Apr 2022 03:05:08 GMT

@Don McCarty, both of community version and paid version has the same tMap, if the functionality exists on both community version and paid version, it should behave the same. I'm sorry if I don't understand your question well, from your first post, I don't see what's the difference of the 'Test' button behave between community version and paid version.

Regards

Shong

Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Wed, 20 Apr 2022 03:46:38 GMT

@Shicong Hong - No worries. Let's put the "test" button aside and focus on what is displayed.

The free version displays the Expression in the "Var" column. While the paid version displays the variable name in the "Var" column.

This leads to issues when double-clicking the entry.

In the free version, the expression is pasted in - this is wrong
In the paid version, the variable reference is pasted in - this is correct (i.e. Var.curr_date in my example)

Let's focus on this first and then next we can dig into the behavior of the testing button.

Further, @Joseph Cronin seems to have encountered the same scenario in an entirely different install so it is not unique to my situation.

Does this help explain the situation better?

Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Sat, 23 Apr 2022 02:27:34 GMT

My screen shots and reports of other would contradict your statement of tmap behaving same in free and paid version Have you tried it Jin your instances?

Re: Talend TMAP not behaving with variable expressions

Anonymous — Sun, 24 Apr 2022 03:11:54 GMT

@Don McCarty , i tested free version and the paid version. both of them displays the expression in the 'Var' column, see below

free version: Talend Open studio for Data Integration 8.0.1

paid version: Talend Cloud Data Fabric 8.0.1

is this the point where you mention they behave differently?

Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Sun, 24 Apr 2022 12:51:55 GMT

@Shicong Hong - thank you very much.

I believe your pictures highlight one of the problems we are having. While your pictures are consistent across platforms, they are showing the expressions. Where the column header clearly states "Var". In this case, the expectation is to display the variable names.

Also - note the behavior when you click a var. The expression is pasted into place. This is also incorrect. The variable name should be pasted in.

Could you also check paid version 7.31? That is the version I'm using at work.

And based on your experience - I'm wondering if this is a bug introduced into v8.01.

Re: Talend TMAP not behaving with variable expressions

Anonymous — Mon, 25 Apr 2022 04:59:36 GMT

@Don McCarty, I have tested with paid version 7.3.1, it is the same result, the expression is listed in the Var column. Can you open a jira on Talend Bugtracker to R&D team to check if it is a bug?

Regards

Shong

Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Mon, 25 Apr 2022 12:12:48 GMT

Will do. Please advise which project you would like me to submit the issue. TOS is not listed. [image: image.png][image: image.png]

Re: Talend TMAP not behaving with variable expressions

Anonymous — Tue, 26 Apr 2022 00:29:20 GMT

@Don McCarty, create a jira issue under 'Talend DI components' project. Thanks!

Re: Talend TMAP not behaving with variable expressions

DonMcCarty — Mon, 09 May 2022 01:23:11 GMT

@Shicong Hong - I'm unable to create the bug report. I can now only get into the Test project.

Also - your note of 4/23/22 notes " i tested free version and the paid version. both of them displays the expression in the 'Var' column"

What you confirmed is the exact problem we are reporting.

You see the expression in the Var column.

The expected behavior is to see the variable name in Var column.

I'm afraid I don't have the ability to take this any further.

At this point, I must request you submit the ticket. If that is not possible, I will simply look for other tools both for my personal use and in our professional services current subscribed service. We are coming up on a decision point later this year.

Re: Talend TMAP not behaving with variable expressions

gjeremy1617088143 — Mon, 09 May 2022 08:29:07 GMT

hi @Don McCarty , don't focus on test function it was always buggy , you can look for other tools , but i can say to you i've tested other ETL like ssis , by far Talend is most user friendly and soft with the use of Java, Tmap is still the most complete component you will see in ETL software.