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rvk

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  • Delphi-Version
    Delphi 10.2 Tokyo

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  1. rvk

    Delphi on Windows 10 HOME 64-bit?

    Those licenses could also be revoked after some time by Microsoft. You will never know beforehand. https://www.howtogeek.com/392080/cheap-windows-10-keys-do-they-work/
  2. rvk

    Sending Email via GMail Using OAuth 2.0 via Indy

    This should have no impact for application passwords. Your application doesn't even need to be changed. Just use the application password instead of the regular GMail password.
  3. rvk

    How to use library from Delphi 10.1 DCUs in Delphi 10.3.3?

    You don't need LoadLibrary/FreeLibrary if you use a static function definition like "external myDLL". So use either LoadLibrary/GetProcAddress/FreeLibrary or use function/external myDLL. Also... you use a string as parameter. That is a managed type. I'm not sure but that might give you problems.
  4. Ah, yes. But Dmitry gave an example of SelectQuery.Transaction := ReadTransaction; So I was talking about setting the actual transaction properties rather than talking about the fact the transaction-property itself is used or not. It indeed seems to be that some of the explicit transaction assignments only work for Interbase/Firebird (???). Also for the transaction of a TDataset: http://docwiki.embarcadero.com/Libraries/Rio/en/FireDAC.Comp.Client.TFDRdbmsDataSet.Transaction How would one set transactions with specific isolation level for MSSQL and Oracle then ??? Doesn't FireDac support these? This page does mention setting isolation level but also mentions it is for Firebird/Interbase. http://docwiki.embarcadero.com/RADStudio/Rio/en/Managing_Transactions_(FireDAC) (FireDac might be even more rubisch than I initially thought if you can't set isolation level etc for other databases via the standard property)
  5. As long as you use the standard properties and values to set the isolation levels etc., they will work for all databases. Most databases have transactions and you should be able set them the same way. i.e. MSSQL and Oracle etc. all have Read Committed transactions levels. So transactions work the same way. Only when setting special properties via the params, you'll get database specific.
  6. By setting the correct isolation level, record version and wait-option for the transaction. https://ib-aid.com/en/how-to-track-deadlocks-in-firebird/ As I said I'm not familiar with FireDac so I'm not sure how to set it. https://stackoverflow.com/a/56337589/1037511 (Something like read_committed, rec_version and nowait should fix deadlocks on select)
  7. For good measure I would add Connected := false after dbQuery.ExecSQL; (But my guess this is also done in dbConn.Free) dbQuery.ExecSQL; dbConn.Connected := false; But I see you update the table in the thread. You didn't do that in your original post. The deadlock can come from using transactions incorrectly (or updating the same record in different transactions/threads), http://www.firebirdfaq.org/faq151/
  8. It's not if you're using a pool. When using a pool the connection is given back to the pool. It's not closed. At least that's what the documentation says. http://docwiki.embarcadero.com/RADStudio/Rio/en/Multithreading_(FireDAC) But maybe the TFDConnection.Free already does that. What's your code like now?
  9. Maybe putting a amNonBlocking in there? FDQuery1.ResourceOptions.CmdExecMode := amNonBlocking; You're not updating anything so I'm not sure why there would be a deadlock there. You set the TFDConnection.Connected to false afterwards in the thread? (because that releases the connection back to the pool)
  10. rvk

    Duplicate resource, but strange...

    Yes, that sometimes happens to me too. Often this is due to the IDE not recognizing some lines and not knowing it already has a {$R *.res} line. Sometimes reordering the uses-units and other elements will fix this (if it keeps happening). (I had to move my {$R} lines above the uses- and {$SETPEFLAGS} lines.)
  11. rvk

    Duplicate resource, but strange...

    Look in your project source (the .dpr file)... do you have multiple {$R *.res} lines?
  12. I have no experience with FireDac, but shouldn't you create a TFDConnection in each thread to be used with TFDQuery? As is shown in http://docwiki.embarcadero.com/RADStudio/Rio/en/Multithreading_(FireDAC)
  13. rvk

    Add a system-menu item to all applications?

    I'm not sure but there might be a way to do it from one exe. But that might be really advanced stuff (haven't looked st the details). https://blog.mattmags.com/2007/06/30/accessing-32-bit-dlls-from-64-bit-code/
  14. Because with older Android version the permission is given during install (if it's asked for by the program). With newer Android the permission needs to be given during runtime (because during install everybody just clicks through without thinking).
  15. If you set the proper permission in the manifest you might be able to manually 'activate' that permission in the permission section of the App-settings in Android (instead of asking this via your program). (But for a production program it is best to ask for it in the program itself)
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