manual to cover all aspects of the query language used by developers to communicate, through their applications, with the Firebird relational database management system. It has a long history. 1.1. Subject Alfonso Luna Simeon Bodurov Cees Meijer Robert Nixon Olivier Dehorter (France) András Omacht (Hungary) Web Express Sergio Conzalez Marc Bleuwart Gabor Boros Shaymon Gracia Campos Cserna Zsombor (Hungary) 2 (SQL/Foundation) part of the SQL specification. DSQL represents statements passed by client applications through the public Firebird API and processed by the database engine. Procedural SQL augments

manual to cover all aspects of the query language used by developers to communicate, through their applications, with the Firebird relational database management system. 1.1. Subject The subject of this 2 (SQL/Foundation) part of the SQL specification. DSQL represents statements passed by client applications through the public Firebird API and processed by the database engine. Procedural SQL augments 64-bit integers.  Use of Dialect 3 is strongly recommended for newly developed databases and applications. Both database and connection dialects should match, except under migration conditions with Dialect

........................................................................................... 8 Performance .............................................................................................. ........................................................................ 30 Supporting legacy applications and drivers ............................................................................ 30 Special SYSDBA-only operations. This loophole has been closed, a change that could affect several existing applications, database tools and connectivity layers (drivers, components). Details are in Chapter 3 of the

allocated to store (cache) database pages in memory to help improve the efficiency of the database performance. It is far quicker to read data from memory that it is to have to physically read the data from  Please don’t consider page buffers value as an ultimate parameter to improve Firebird’s performance, and don’t set it too high without clear understanding what are you doing. The setting applies physical server crashed, then these remnants may still exist, even in later versions of Firebird. • Applications, described above, which delete database records, but then, subsequently, never revisit those

multi-processor) sup- port. Better performance in case of a small number of connections that do not influ- ence each other. No SMP support. On multi-processor Win- dows machines, performance can even drop dramatically circumstances, chances are that you won't notice a performance difference. Note that you can always switch to the other architecture later; your applications and databases will keep func- tioning like before /usr/lib/libfbclient.so ...replacing 2.m.n with your version number, e.g. 2.0.0 or 2.1.0 If you're running applications that expect the legacy libraries to be present, also create the following sym- links: ln -s

the user employs a shell script or batch file to perform database functions.  Because other applications in the Linux environment, for example, MySQL, also use isql as a utility name, you are advised SET SQL DIALECT -- set sql dialect to SET STATs -- toggle display of performance statistics SET TIME -- toggle display of timestamp with DATE values SET TERM Variables An environment variable is a named object that contains information used by one or more applications. They are global to their specific operating systems. The Firebird server recognises and uses

toujours basculer d'une architecture à l'autre plus tard; vos applications et vos bases fonctionneront toujours (sauf si vos applications font appels à certaines fonctionnalités des Services Manager encore ...) Client Firebird fbclient.dll (avec en option gds32. dll, pour utiliser les an- ciennes applications) \bin (avec en option une copie dans Windows System – voir la note en bas de ta- pas de notes de version dans votre kit d'installation, allez à la page de téléchargements du site web de Firebird http://firebird.sourceforge.net et récupérez une copie à partir de là. Si vous avez une

sup- port. Better performance in case of a small number of multiple connections that do not influence each other. No SMP support. On multi-processor Windows ma- chines, performance can even drop dramatically circumstances, chances are that you won't notice a performance differ- ence. Besides, you can always switch to the other architecture later; your applications and databases will keep functioning (except if configuration is forced writes off (or disabled). It is sometimes resorted to in order to improve performance during large batch operations. The big warning here is: do not disable forced writes on a Windows

response to a query asking if there is a way to reduce the memory cache without giving up too much performance? This was itself in respect of a system that was taking a long time to wake up from hibernation is nothing we can do to avoid that. When the database is started up the cache is empty, when applications connect and access the database, various pages must be read and the cache must be filled, so physical discs but three still remain in cache, as yet, unwritten. The results shown above show the performance of the cache over the life of the database so far. We can narrow this down to our current attachments

is — as the name says — an IDentifier for each generator, not its value. Also, don’t let your applications store the ID for later use as a handle to the generator. Apart from this making no sense (the for any practical application. And since the number of generators you declare has no effect on performance, you can feel free to use as many generators as you like. Chapter 2. Generator Basics 5 2.5