Virtual strings in DBF

Virtual strings in DBF

Postby Natter » Thu Sep 28, 2023 9:05 am

Is it possible to work with virtual (not physical) strings in DBF ?
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Re: Virtual strings in DBF

Postby Antonio Linares » Thu Sep 28, 2023 9:27 am

Dear Yuri,

What is a virtual string ?
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Re: Virtual strings in DBF

Postby Natter » Thu Sep 28, 2023 9:49 am

Something like that:
In the open DBF (In exclusive mode), we add lines, but do not save them to disk.
These lines exist only while the database is open.
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Re: Virtual strings in DBF

Postby Carles » Thu Sep 28, 2023 10:45 am

Natter,

Prueba de usar el rddarray

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Re: Virtual strings in DBF

Postby Natter » Thu Sep 28, 2023 11:05 am

Thanks for the advice. Is it possible to learn more about using RddArray ?
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Re: Virtual strings in DBF

Postby Carles » Thu Sep 28, 2023 11:24 am

Salutacions, saludos, regards

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Re: Virtual strings in DBF

Postby Natter » Thu Sep 28, 2023 11:37 am

If I understood correctly, then we are talking about creating a DBF in memory and working with it.
If so, then this is not exactly what I need. I need to open an existing DBF on disk (which already has some strings) and
add virtual strings to it. I.e., the physical strings of this DBF will be available to everyone, and the virtual ones only to me.
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Re: Virtual strings in DBF

Postby Carles » Thu Sep 28, 2023 12:19 pm

Then u could use triggers with rdd. Every time update a field then it will update a dbf tmp with the same struct.

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Re: Virtual strings in DBF

Postby Carles » Thu Sep 28, 2023 12:25 pm

And before ask me, here example of use it

https://github.com/harbour/core/blob/ma ... logrdd.prg

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Re: Virtual strings in DBF

Postby Jimmy » Thu Sep 28, 2023 1:08 pm

hi Natter.

what about "GhostRec" :idea:
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Re: Virtual strings in DBF

Postby Natter » Thu Sep 28, 2023 1:32 pm

What is this ?
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Re: Virtual strings in DBF

Postby Jimmy » Thu Sep 28, 2023 3:34 pm

hi Natter,

"GhostRec" -> EOF() + 1
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Re: Virtual strings in DBF

Postby Natter » Thu Sep 28, 2023 6:36 pm

Thank you, Jimmy, Interesting idea !
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