Re: [Lazarus] Returning value from a Firebird (embedded) generator into Lazarus code
On Sat, 25 Apr 2015, Gabor Boros wrote: 2015.04.25. 16:52 keltezéssel, brian írta: Retrieve a value generated by a Firebird generator (in other words, an autoincremented value stored within the database) and get that incremented value into a Pascal variable. The SQL code to increment the value in the Firebird database is SELECT (generator,increment) FROM RDB$DATABASE; but I'm struggling to find a way to retrieve that incremented value. Simply attaching a data source to the query returns zero rows when the SQL is executed. I'm wondering whether I need to use a dummy table and then use the generator to update a field, then retrieve the data with a separate query. Hi, Use RETURNING clause with INSERT or UPDATE is a better solution. Correct but this is not a solution if you just need the value, without INSERT or UPDATE statement. Michael.-- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] lazbuild to user directory on Windows
Hi, I'd like to use Lazarus for my pupils in school (Win 7), and our sysadmin has installed Lazarus to a read only network directory. After a test compile the unit win9xwsmanager was not found, so I tried to recompile the lclbase package. Package rebuild for a read only lazarus installation does not work without administrator rights under Windows, as the lazbuild results will go directly into the lazarus directory tree. While under Linux, lazbuild results will be put into the user's directory under ~/.lazarus/lib, thus Package rebuild is possible for normal users under Linux. Unfortunately, I could not find any settings for Lazarus to make lazbuild's results also go under Windows to the user directory (i. e. to C:\Users\username\AppData\Local\lazarus\lib). Can anyone tell me how to do this? (Of course, in my case it will be just nice if the complete build will be later available from the read only lazarus directory, but first I want to test everything, as I am not the administrator user.) Regards Bernd -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] ShowMessage not Modal
Hi All,
I have a strange problem.
If I use ShowModal (or MessageDlg) in my application, the code is being
executed, but it is not Modal.
e.g.
If I coded
ShowMessage('Hello');
Close;
Exit;
The message would not show (or just flicker) and the application would
close.
What's puzzling is that if I create a new app, and they do the same code,
it works as expected!
Any ideas?
Richard
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Re: [Lazarus] ShowMessage not Modal
Sorry, I should have also added...
Lazarus 1.4 Windows 7 fpc 2.6.4
Richard
On 26 April 2015 at 06:56, Richard Mace richard.m...@gmail.com wrote:
Hi All,
I have a strange problem.
If I use ShowModal (or MessageDlg) in my application, the code is being
executed, but it is not Modal.
e.g.
If I coded
ShowMessage('Hello');
Close;
Exit;
The message would not show (or just flicker) and the application would
close.
What's puzzling is that if I create a new app, and they do the same code,
it works as expected!
Any ideas?
Richard
--
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Lazarus@lists.lazarus.freepascal.org
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[Lazarus] Lazbuild add package on commandline
Hello to all, As new member of this list, I would like to ask a question. I am trying to maintain the fpcup utility made by the late Reinier. As such, I am running into a problem. When trying to add a package from the commandline with lazbuild, the packagefiles.xml file is not updated due to: procedure SaveUserLinks(Immediately: boolean = false); inside unit PackageLinks If I change this default value to true, then the packagefiles.xml is updated with the package data. And the package can be installed correctly. My question / possibilities: 1) could this default be changed to true ? 2) could a command line switch be added to lazbuild for immediate update of packagefiles.xml when used from commandline ? Thanks in advance.-- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Returning value from a Firebird (embedded) generator into Lazarus code
On Sat, 25 Apr 2015 14:12:44 +, you wrote: brian wrote: Hi folks, Can someone please give me a hint with this problem. I'm new to Firebird, but I needed a database which could be used in embedded fashion, and seemed to have a choice of one under Linux. What I need to do is to return a value generated by a Firebird generator into my Pascal code. Doing it what seemed to me to be the obvious way returns zero rows, do I need to update an interim table and then query that table? Or is there some other method which I've missed? Embedded in what way? I use Firebird on occasion as an alternative to PostgreSQL (i.e. in a client-server scenario), but I'd have thought for a single-system application SQLite would have been worth a look. Embedded as in there is no requirement for the user to do anything except unpack a zip file and run the executable. No installation of any kind of server on the host system. Having said that, apart from Firebird's poor documentation I've had no significant problem querying and updating tables. What exactly are you trying to do? Retrieve a value generated by a Firebird generator (in other words, an autoincremented value stored within the database) and get that incremented value into a Pascal variable. The SQL code to increment the value in the Firebird database is SELECT (generator,increment) FROM RDB$DATABASE; but I'm struggling to find a way to retrieve that incremented value. Simply attaching a data source to the query returns zero rows when the SQL is executed. I'm wondering whether I need to use a dummy table and then use the generator to update a field, then retrieve the data with a separate query. Brian. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Returning value from a Firebird (embedded) generator into Lazarus code
On Sat, 25 Apr 2015 16:18:18 +0200 (CEST), you wrote: On Sat, 25 Apr 2015, brian wrote: Hi folks, Can someone please give me a hint with this problem. I'm new to Firebird, but I needed a database which could be used in embedded fashion, and seemed to have a choice of one under Linux. What I need to do is to return a value generated by a Firebird generator into my Pascal code. Doing it what seemed to me to be the obvious way returns zero rows, do I need to update an interim table and then query that table? Or is there some other method which I've missed? Do a SELECT GEN_ID(YOUR_GENERATOR,1) AS THEVALUE FROM RDB$DATABASE in a TSQLQuery instance. Then call Open and you can get the value. Something like: With TSQLQuery.Create(Nil) do try Database:=MyDatabase; SQL.Text:='SELECT GEN_ID(YOUR_GENERATOR,1) AS THEVALUE FROM RDB$DATABASE'; Open; MyGenValue:=Fields[0].AsLargeInt; Finally Free; end; Michael. Ahh.. OK, I knew it was something obvious. Thanks, Michael. I guess I've forgotten more of my (Oracle) SQL than I thought. I see what I've been doing wrong. Brian. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Returning value from a Firebird (embedded) generator into Lazarus code
brian wrote: Hi folks, Can someone please give me a hint with this problem. I'm new to Firebird, but I needed a database which could be used in embedded fashion, and seemed to have a choice of one under Linux. What I need to do is to return a value generated by a Firebird generator into my Pascal code. Doing it what seemed to me to be the obvious way returns zero rows, do I need to update an interim table and then query that table? Or is there some other method which I've missed? Embedded in what way? I use Firebird on occasion as an alternative to PostgreSQL (i.e. in a client-server scenario), but I'd have thought for a single-system application SQLite would have been worth a look. Having said that, apart from Firebird's poor documentation I've had no significant problem querying and updating tables. What exactly are you trying to do? -- Mark Morgan Lloyd markMLl .AT. telemetry.co .DOT. uk [Opinions above are the author's, not those of his employers or colleagues] -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Returning value from a Firebird (embedded) generator into Lazarus code
On Sat, 25 Apr 2015, brian wrote: Hi folks, Can someone please give me a hint with this problem. I'm new to Firebird, but I needed a database which could be used in embedded fashion, and seemed to have a choice of one under Linux. What I need to do is to return a value generated by a Firebird generator into my Pascal code. Doing it what seemed to me to be the obvious way returns zero rows, do I need to update an interim table and then query that table? Or is there some other method which I've missed? Do a SELECT GEN_ID(YOUR_GENERATOR,1) AS THEVALUE FROM RDB$DATABASE in a TSQLQuery instance. Then call Open and you can get the value. Something like: With TSQLQuery.Create(Nil) do try Database:=MyDatabase; SQL.Text:='SELECT GEN_ID(YOUR_GENERATOR,1) AS THEVALUE FROM RDB$DATABASE'; Open; MyGenValue:=Fields[0].AsLargeInt; Finally Free; end; Michael. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Returning value from a Firebird (embedded) generator into Lazarus code
2015.04.25. 16:52 keltezéssel, brian írta: Retrieve a value generated by a Firebird generator (in other words, an autoincremented value stored within the database) and get that incremented value into a Pascal variable. The SQL code to increment the value in the Firebird database is SELECT (generator,increment) FROM RDB$DATABASE; but I'm struggling to find a way to retrieve that incremented value. Simply attaching a data source to the query returns zero rows when the SQL is executed. I'm wondering whether I need to use a dummy table and then use the generator to update a field, then retrieve the data with a separate query. Hi, Use RETURNING clause with INSERT or UPDATE is a better solution. Gabor -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
