topic Re: Read File, run the query in database, save the result back to a file in Talend Studio

Read File, run the query in database, save the result back to a file

Anonymous — Sat, 16 Nov 2024 14:04:43 GMT

Hi
Here I am explaining my situation. Need to do a mapping
Step 1. File Input (Excel)
SNO;Query;
1;select count(*) as result from demo where rownum <10;
2;select count(*) as result from demo where rownum <20;
Step 2. Run Query in Database (Oracle 9i)
Step 3: Save the count back to another file (Excel)
SNO;Count
1;9
2;19
I am using tOracleRow to execute the query. However nothing productive yet.
Please give me suggestion to deal this situation.
Thanks in advance.
-
sangi

Re: Read File, run the query in database, save the result back to a file

Anonymous — Wed, 11 Feb 2009 06:18:53 GMT

Hi sangi,
use a tOracleInput to get the data. You job should look like the following:
tFileInputExcel --(row)--> tFlowToIterate --(iterate)--> tOracleInput --(row)--> tIterateToFlow --(row)--> tFileOutputExcel
In tFlowToIterate you store your data in the global map. You could use the information from the global map to create your query.
In tIterateToFlow you store your result and the data of the global map back in the row.
To access the global map use: ((String)globalMap.get("rowX.name"))
Bye
Volker

Re: Read File, run the query in database, save the result back to a file

Anonymous — Wed, 11 Feb 2009 06:28:40 GMT

Hi Volker,
Thanks for the suggestion. I will try and let you know the result.
-
sangi

Re: Read File, run the query in database, save the result back to a file

Anonymous — Wed, 11 Feb 2009 07:18:45 GMT

In this flow
tFileInputExcel --(row)--> tFlowToIterate --(iterate)--> tOracleInput --(row)--> tIterateToFlow --(row)--> tFileOutputExcel
I am unable to do the following
tOracleInput --(row)--> tIterateToFlow
tOracleInput is allowing me to connect to tIterateToFlow (with Main)
Please advice me.
Thanks
-
sangi

Re: Read File, run the query in database, save the result back to a file

Anonymous — Wed, 11 Feb 2009 07:41:20 GMT

Hi sangi,
sorry you are right. It is not possible to connect them directly. Attached you find some screen shots. Looks scary but works...
Input

1, SELECT count(*) AS result FROM rel_release;
2, SELECT count(*) AS result FROM sys_system;

Output

1
 SELECT count(*) AS result FROM rel_release;
1362
--------------------------------------------------
2
 SELECT count(*) AS result FROM sys_system;
117
--------------------------------------------------

Bye
Volker

Re: Read File, run the query in database, save the result back to a file

Anonymous — Wed, 11 Feb 2009 11:41:58 GMT

Thanks a lot Volker, Its working!!!