I want a job that runs only when there is a value present in one of the tables
For example - if the value col1 in select col1 from table is 'abc' then only will I execute the jobs.
Any ideas on this would be of great help
I may be misunderstanding this question, but are you asking for a way to identify which job to run by the data in your database? If that is the question, you can use the "Use Dynamic Job" functionality of the tRunJob component. Essentially you need to have a parent job which runs a query on your DB. Depending on what it returns the job can select which child job to get the tRunJob to run.
I will explain a little in detail. Let's say I have a job j1. This job must run only if the value select col1 from table = 'abc'.
If the value does not match then it should not execute, I don't want any error generated.
You can do this using what @TRF suggested, but don't use the tDie. Just use conditional logic (using RunIf links) based on the success or failure of the query. If the query returns the value you want, go down the RunIF pointing to the tRunJob used to run this job. If it doesn't, do nothing.
OK, so you can go with the proposition I made on top of this topic, it's enough.
You just have to decide the scheduling to start the job when needed.
Hi, thanks for the reply.
I am trying to do this.
tmssqlinput --> tmap --> tjava --runif --> tsendmail
in tmssqlinput I have the query, "select [Values] val from lookupvalues where tablename = 'ETLSource'" which returns the value "devsprint13"
in tjava I have the code as context.source= row1.val;
In runif the code is "devsprint13".equals(context.source)
When I run the job, the runif returns a false.
When I try to see the output of tjava using a tlogrow the context.source has no value assigned.
I don't understand why the value of the query output is not being assigned to context.source in tjava ( context.source= row1.val;)
Any ideas on this?
Use a tSetGlobalVar instead of the tJava component. If you are not aware of this component, it allows you to set a hashmap variable from a column in the data row. To use this in the RunIf you would do something like this (assume the name of the variable is "myVar")....
globalMap.get("myVar")!=null && ((String)globalMap.get("myVar")).equals("devsprint13")
The tJava is not really an "on row" component *could* be one of the reasons. The context variable has not been properly assigned before testing the RunIf condition, *could* be another reason. I'd have to look at the job. But this way would be a better way of doing this. If this doesn't work you will need to check that your tMap is configured properly.
When I connect the tjava to a tlogrow then I do get the output as desired. Only When I have connected to RunIf the code always returns a false
The job design is as I have explained in my previous reply
Yes, it could be easier if we have a picture of the job and as you said the runIf link allways returned false, we need the condition you've written to try to help you.
Talend named a Leader.
Kickstart your first data integration and ETL projects.
Watch the recorded webinar!
Learn how to do cool things with Context Variables
Find out how to migrate from one database to another using the Dynamic schema
Pick up some tips and tricks with Context Variables