Difference between revisions of "Lazarus DB Faq"

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{{Lazarus DB Faq}}
 
{{Lazarus DB Faq}}
  
== General ==
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{{Infobox databases}}
  
This FAQ will be directed to database programming with Lazarus.
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This is a list of Frequently Asked Questions (FAQ) regarding database programming with Lazarus.
  
=== Where can I find more FAQ? ===
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=== Where can I find more information? ===
 
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Databases:
See the official website www.lazarus.freepascal.org. There is another FAQ as well. In [[Lazarus Faq]] you will find a page that once started as a copy of the FAQ from www.lazarus.freepascal.org .
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* See [[Databases]] and the articles about using databases/SQLQuery.
  
 
=== Where can I find database components? ===
 
=== Where can I find database components? ===
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At the moment the SQLdb components are part of FPC and Lazarus. They are installed by default in all more or less recent Lazarus versions.
  
At the moment the SQLdb components are part of the Lazarus package, you only need to install them. If you look in the [$LazarusDir]/components you will see a subdirectory SQLdb. Install the sqldblaz.lpk and you will be able to connect to MySQL, Interbase / Firebird and Postgres servers.
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Manual installation: if you look in the [$LazarusDir]/components you will see a subdirectory SQLdb. Install the sqldblaz.lpk and you will be able to connect to MySQL, Interbase / Firebird, Postgres, MS SQL and Sybase ASE (if you have FPC 2.6.1+), Oracle servers.
Look at [[Install Packages]] for help on installing packages.
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See [[Install Packages]] for help on installing packages.
  
=== Are there other components? ===
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=== Supported databases ===
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* See [[Lazarus Database Overview]] for a list of what databases are supported by SQLDB.
  
* [http://zeoslib.sourceforge.net/index.php ZEOS components] - have been ported to Lazarus as well.
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=== Known issues ===
You have to download ZEOSDBO_Rework from [http://sourceforge.net/cvs/?group_id=35994 ZEOS cvs].
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* See [[fcl-db#Known%20issues/shortcomings]]
See also this tutorial for [[Zeos_tutorial|Zeos]].
 
  
* [http://pdo.sourceforge.net Pascal Data Objects] - works equally with Delphi and FPC 2.0 (MySQL and Firebird)
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=== Are there other components? ===
 
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* See [[Lazarus Database Overview]] for a list of what databases work with what components.
* [http://sourceforge.net/projects/fibl/ FIBL] - FIBL is Sergey Smirnov's port of FreeIB by Greg Deatz. Works with Interbase and Firebird
 
 
 
* [http://www.progdigy.com/?page_id=5 Unified IB] - UnifiedIB - Works with Firebird
 
 
 
* [http://www.sybase.com/products/databasemanagement/advantagedatabaseserver/tdataset-descendant Advantage] - Advantage TDataSet Descendant.  Supports Advantage Database Server version 10.1 or greater.
 
 
 
== IB / FB ==
 
 
 
=== How do I connect from Linux to a Windows server ===
 
Entering the correct path to a database on a Windows server from a Linux client is not very clear.
 
 
 
Say you have installed firebird in F:\Program Files\firebird\. The employee.fdb example database will then be installed in the directory F:\Program Files\firebird\examples\ . The IP-adress of your computer is 192.168.2.100.
 
 
 
Then entering the following databasename 
 
192.168.2.100:F:\Program Files\firebird\examples\employee.fdb
 
in your IBConnection will connect to the required database.
 
 
 
Note that you don't have to enter a value for the hostname property!
 
 
 
== MySQL ==
 
 
 
=== Which version of mySQL is supported? ===
 
 
 
Currently MySQL 4.0, MySQL 4.1 and MySQL 5.0 are supported by de SQLdb components. Make sure you are using the correct connection component for your client library version. So if you have the client libraries installed for MySQL 4.1 then you have to use TMySQL41Connection component, even if the server is running version 4.0 or 5.0.
 
 
 
==== Pascal Data Objects ====
 
There is now an alternative.  The functions introduced with MySQL 4.1 and 5.0 like prepared statements, binding, and stored procedures are supported by database API called Pascal Data Objects, which is inspired by PHP Data Objects.  All the code and documentation necessary to use this new API is available on sourceforge:
 
 
 
http://pdo.sourceforge.net
 
 
 
Jan 30, 2007: PDO has added drivers for Firebird 1.5 and 2.0
 
 
 
== PostgreSQL ==
 
 
 
You can connect to PostgreSQL db by TPQConnection component. This component uses the PostgreSQL's libpq connection library[http://www.postgresql.org/docs/8.0/interactive/libpq.html], so you can easily connect almost every PostgreSQL db, but the component doesn't support the following connection options:
 
* Port
 
* ClientEncoding
 
Maybe there are other unsupported connection parameters.
 
  
The TPQConnection component does not directly support a Port property, but one can pass the port into the component via the Params parameter:
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=== Lazarus and FPC documentation ===
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The Lazarus visual database controls use FPC database code. Please see [http://www.freepascal.org/docs-html/fcl/sqldb/index.html SQLDB documentation] for more information.
  
<delphi>PQConnection.Params.Add('port=' + VariableContainingPort);</delphi>
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Background info on SQLDB: [[SqlDBHowto]]
  
== See also ==
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More info on TSQLQuery: [[Working With TSQLQuery]]
  
* [[Databases]]
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=== Lazarus documentation ===
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* Some information on the interaction between the various FPC and Lazarus components: [[SQLdb Programming Reference]]
  
 
[[Category:Databases]]
 
[[Category:Databases]]
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[[Category:FPC]]
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[[Category:Lazarus]]
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[[Category:FAQs]]

Latest revision as of 11:59, 15 August 2016

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Databases portal

References:

Tutorials/practical articles:

Databases

Advantage - MySQL - MSSQL - Postgres - Interbase - Firebird - Oracle - ODBC - Paradox - SQLite - dBASE - MS Access - Zeos

This is a list of Frequently Asked Questions (FAQ) regarding database programming with Lazarus.

Where can I find more information?

Databases:

  • See Databases and the articles about using databases/SQLQuery.

Where can I find database components?

At the moment the SQLdb components are part of FPC and Lazarus. They are installed by default in all more or less recent Lazarus versions.

Manual installation: if you look in the [$LazarusDir]/components you will see a subdirectory SQLdb. Install the sqldblaz.lpk and you will be able to connect to MySQL, Interbase / Firebird, Postgres, MS SQL and Sybase ASE (if you have FPC 2.6.1+), Oracle servers. See Install Packages for help on installing packages.

Supported databases

Known issues

Are there other components?

Lazarus and FPC documentation

The Lazarus visual database controls use FPC database code. Please see SQLDB documentation for more information.

Background info on SQLDB: SqlDBHowto

More info on TSQLQuery: Working With TSQLQuery

Lazarus documentation