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vardhancse
Specialist III
Specialist III

Incremental Load with multiple CSV files and single sheet

Hi,

Have one requirement:

1. Load multiple CSV files appended with date e.g: 2017-03-28 EMP Data.csv [Done]

2. based on file name date column need to be extracted[Done]

2. All csv files will be one single folder[Done]

3. Load all csv files and concatenate to one single table[Done]

4. After loading the files, old csv files will be deleted [Pending]

4. daily new file will be placed and append new file records to existing records in QV table[Pending]

PFA sample csv files and qvw

Can any one please let me know the incremental load logic need to be applied here.

15 Replies
vardhancse
Specialist III
Specialist III
Author

Thank you used where condition and your script works fine, can please let me know any way we can achieve with our primary key

balar025
Creator III
Creator III

Hi Sasi,

you can take max date from qvd and check the condition. Like extracted date of files should be greater than max date from qvd.

For Example,

Let vFilePath = '1302030\*EMP Data.csv';

Let qvdExists = isNull(QvdCreateTime('1302030\EMP_Data.qvd'));

if $(qvdExists) < 0 then

Trace New file came.No Qvd is there;

EMP_Data:

LOAD EMPId,

    Name,

    Location,

    Date(Left(FileName(),10),'YYYYMMDD')    as Date_ID

FROM

$(vFilePath)

(txt, codepage is 1252, embedded labels, delimiter is ',', msq);

else

Trace New file came with existing qvd;

EMP_Data:

LOAD*

FROM

[1302030\EMP_Data.qvd]

(qvd);

MaxDateQvd:

Load Max(Date_ID) as MaxDate

Resident EMP_Data;

Let vMaxDate = Peek('MaxDate',0,'MaxDateQvd');

EMP_Data:

LOAD EMPId,

    Name,

    Location,

    Date(Left(FileName(),10),'YYYYMMDD')    as Date_ID

FROM

$(vFilePath)

(txt, codepage is 1252, embedded labels, delimiter is ',', msq)

where Date(Left(FileName(),10),'YYYYMMDD')>$(vMaxDate);


Bold part are changes in code.


-Ravi Balar

vardhancse
Specialist III
Specialist III
Author

Thanks once will try now

atkinsow
Specialist II
Specialist II

Sorry you're having trouble.  My code would never just delete a QVD.  There is no script in there that would delete a file.  Worse thing any store command should do is create a QVD with no records in it.

Is that what is happening?

If so, the IF statement I had must not be 'catching'.  I would check the file paths and no a debug to see what is happening.

If Ravi's code is working for you then go with that.

vardhancse
Specialist III
Specialist III
Author

Hi Ravi

With Date > condition unique records are not getting recognized

balar025
Creator III
Creator III

HI Sasi,

Can you please explain on Unique record? It is based on what? EMPId or EMPId&Date ?


Regards,

Ravi Balar