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Editorial Team
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Asked: 2026-05-13T07:38:48+00:00

My question is very simple. I have a TClientDataSet that is linked to a

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My question is very simple. I have a TClientDataSet that is linked to a TADOQuery via a TDataSetProvider. I can put data into the TClientDataSet from the TADOQuery, but how do I get data from the TClientDataSet back into the TADOQuery?

Data is automatically transferred from the TADOQuery to the TClientDataSet when I run a query and then set the TClientDataSet’s Active property to True, but if I deactivate the TADOQuery and then activate it again, how can I get the data back from the TClientDataSet?

I am running the same query on several databases and using the TClientDataSet to concatenate the results. This is working fine. My problem now is that I need to get the concatenated result set back from the TClientDataSet into the TADOQuery so that I can use the TADOQuery’s SaveToFile procedure (for compatibility reasons). How can I do this?

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  1. Editorial Team

    I’ve just about finished looking into this. My application allows the user to generate reports by querying their databases. I can get this to work and it is very efficient for small result sets – however, as this is a reporting application, and it’s entirely possible that hundreds of thousands of records can be returned, using a ClientDataSet gives massive performance problems. Once you get above around 50,000 records (reasonable, given the customer base), processing starts to increase exponentially, so this is now basically moot.

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