How does one perform Cursor joins in DPL?

How does one navigate the API to do cursor joins? Can one do it and still exploit DPL concepts, or must one keep open a separate low-level BDB Database?

Hi Jdf,
Since you said "cursor joins" I assume you are familiar with the base BDB API that provides joins via cursors. In DPL the same functionality is provided by using the EntityJoin class. Instead of cursors, you specify the secondary key values, but the result is the same. An underlying cursor join is performed for you.
Mark

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lchoisf wrote:
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"I had rather be right than be president" -Henry Clay
Solved!
Go to Solution.

eximo wrote:
Problem Statements:
1 When using a refnum, writing any changes to the refnums property value will also change the parent i.e. the subvi xygraph.
I don't understand this statement. Does the subVI have a graph also? Obviously, if you make changes to properties via the refnum, then the graph it's pointing to will change.
p.p.s. I understand that there is an invoke node that will export an image, it contains certain limitations (such as requiring the subvi be opened, since it works by similar rules to a printscrn) that make it un applicable to this problem.
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How does one perform Cursor joins in DPL?

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