sybase_result
Sybase generates the following warning whenever you change databases.
Sybase: Server message: Changed database context to 'databasename'.
Suppress the message by prefixing sybase_connect and sybase_select_db with an @ sign.
sybase_select_db
(PHP 4, PHP 5)
sybase_select_db — seleccciona una base de datos Sybase
Descripción
int sybase_select_db
( string $database_name
[, int $link_identifier
] )
sybase_select_db() establece como activa la base de datos en el servidor asociada con el identificador de enlace específicado. Si no se específica un identificador de enlace, se asume el último enlace abierto. Si no hay un enlace abierto, la función intentará establecer un enlace como si sybase_connect() fuese llamada, y lo usará.
Cada llamada subsiguiente a sybase_query() será hecha en la base de datos activa.
Devuelve TRUE si todo se llevó a cabo correctamente, FALSE en caso de fallo.
Cada llamada subsecuente a sybase_query() se hará en la base de datos activa.
Vea también sybase_connect(), sybase_pconnect(), sybase_query()
add a note
User Contributed Notessybase_select_db
jayne dot westall at bayernlb dot co dot
31-Oct-2005 09:33
31-Oct-2005 09:33
verdy_p at wanadoo dot fr
24-Jul-1999 11:14
24-Jul-1999 11:14
Using this function is not required under Sybase, because Sybase SQL Server users can be configured with a default database to use at connection time. You only need this function if your SQL Server has multiple database names, and you want to switch your queries from one database to another one on the same SQLServer, for example if the connection user name has "master" as its default database name and you want to process queries in your application database, or if the username (in fact the loginname in Sybase terminology) has an application database configured for its default database, and you want to process some queries in the "master", "tempdb", or "sybsystemprocs" database.
When you call this function, and it returns successfully, the "username" parameter in the sybase_connect or sybase_pconnect function calls is NOT the user name that holds the access rights in that database. In fact, the "username" is used by Sybase only as a loginname for the SQL Server, and it is mapped to a database-specific username according to the contents of the database sysusers system table that maps logins to database users. Many databases only have a "dbo" username, whatever the loginname you configured on the server's "master" database; in that case to the database is specified by the default servername for the specified loginname, and the access rights are determined by the database's map in sysusers system table which specifies with login is associated with the "dbo" user. You may elect to configure another user in your application database, with limited granted rights, and then add a new server login with a specific password and this database as its default database to use. Such a configuration will add an extra level of security for your database, avoiding full privileges (thus forbidding alteration of the database schema by PHP3 scripts). You may also give strict grants with select-only access rights to the new user, so that PHP3 will only be able to select data from the database, but won't be granted to modify the database contents.