Report is generating very slowly

Question

Hi all, my crystal report is generating very very slowly my report is having many sub reports inside it as well,
see the time difference in the following lines that comes out while generating the report from my Application, please comment how can i solve this
03/26/2014 06:03:47 PM ... Process({User I/F} Priority: 4, user interface)
a RDCReport is getting OLE property "SQLQueryString" with arguments: ()
03/26/2014 06:07:38 PM ... Process({User I/F} Priority: 4, user interface)
Get OLE Property "SQLQueryString" returned: SELECT "TABLE"."COLUMNS" .................... long long query here
No functions or cursors have applied in crystal report but still it is taking too long to generate

Answer 1

hi Muhammad,
what happens if you run the report in the report designer, i.e. crw32?
i would suggest looking at your subreports as running a lot of details level subs in a report is going to be slow. if you've got subs on the details level, one query will be run per subreport on each record, which will eat up a lot of processing.
sometimes subreports can be eliminated as well...for example, if your subreport contains the same tables as your main report, you can get rid of a subreport and substitute it for a cross-tab if you're only showing data in tabular format.
try suppressing all of your subreports as well, and then un-suppress them one at a time, refreshing the report each time a subreport is unsuppressed. perhaps there is one particular subreport that is a problem.
if you only find that your subreport is slow in your application, please post a new discussion to the crystal reports for visual studio forum.
-jamie