Download Mask/Filter for BLOB
Hi,
I use APEX: 4.2.
I have got a problem to display the Download link (button) in a classic report to open the uploaded file. I have got two columns in the report: FILENAME and ATTACHMENT. The second is the BLOB type column in my table.
My Report query is: select FILENAME, ATTACHMENT from QTMT_TICKETS where TICKET_ID = :P10_TICKET_ID The report display the name of the uploaded file and the second column display: [datatype].
I added a Mask/Filter to the second column in my report: DOWNLOAD:QTMT_TICKETS:ATTACHMENT:TICKET_ID::MIMETYPE:FILENAME:ATTACH_LAST_UPDATE::Attachment:Download But then I got error: report error: ORA-01403: no data found , the Column Attributes is set to: Standard Report Column.
The upload looks good. I got populated in my table all four mandatory fields for the BLOB (ATTACHMENT, MIMETYPE, FILENAME, ATTACH_LAST_UPDATE).
Could you please let me know what I do wrong?
Thank you and best regards,
Vladimir
Vladimir Bartos wrote:
I have got a problem to display the Download link (button) in a classic report to open the uploaded file. I have got two columns in the report: FILENAME and ATTACHMENT. The second is the BLOB type column in my table.
My Report query is: select FILENAME, ATTACHMENT from QTMT_TICKETS where TICKET_ID = :P10_TICKET_ID
As described in the documentation, the download link column in the report must provide the length of the BLOB:
>
To facilitate the inclusion of a download link in a report, the report includes the selection of the length of the BLOB (for example, dbms_lob.getlength(RESUME)). If the length is 0, the BLOB is NULL and no download link is displayed.
>
The report query should therefore be something like:
select FILENAME, dbms_lob.getlength(ATTACHMENT) attachment from QTMT_TICKETS where TICKET_ID = :P10_TICKET_ID
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Hi,
I am trying to create a report on a table with BLOB data so that the report displays a "download" link for the BLOB data. I am trying to give users the ability to download files from a website.
I have been following the instructions in OBE "Defining and Viewing BLOB Data in Oracle Application Express 3.1".
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Edited by: user716599 on Sep 18, 2008 12:31 AMGood morning,
Here is how I have solved this problem.
1. The select statement in the sql for the report should not include the BLOB column. I decided to select only 2 columns, the column that has the key and the column with the filename.
2. On the first column ( the primary key ) I put in the format statement that was simply DOWNLOAD:TABLENAME:BLOB_COLUMN:PRIMARY_KEY
This works. I believe that the Oracle error I was getting was because I was trying to apply this format statement to the actual BLOB column.
So, it appears that you can use any of the columns in the report to hold the DOWNLOAD format statement since in the format statement, you are defining the BLOB table, BLOB column and the primary key into that column.
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Re: Problem providing download link for BLOB data in apex report
Hi Don,
Your solution below worked but in the download option i only see save but not open for PDf file in the blob. Please let me know if you have any suggestion to achieve it
Thanks
Jo
Problem providing download link for BLOB data in apex report
591953 Nov 19, 2008 1:55 PM (in response to 660436)
Currently Being Moderated
Good morning,
Here is how I have solved this problem.
1. The select statement in the sql for the report should not include the BLOB column. I decided to select only 2 columns, the column that has the key and the column with the filename.
2. On the first column ( the primary key ) I put in the format statement that was simply DOWNLOAD:TABLENAME:BLOB_COLUMN:PRIMARY_KEY
This works. I believe that the Oracle error I was getting was because I was trying to apply this format statement to the actual BLOB column.
So, it appears that you can use any of the columns in the report to hold the DOWNLOAD format statement since in the format statement, you are defining the BLOB table, BLOB column and the primary key into that column.
Hope this helps,
Don.Branched out from a years old thread.
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