odbc_num_rows
The following constants are defined for cursortype:
- SQL_CUR_USE_IF_NEEDED
- SQL_CUR_USE_ODBC
- SQL_CUR_USE_DRIVER
- SQL_CUR_DEFAULT
With some ODBC drivers, executing a complex stored procedure may fail with an error similar to: "Cannot open a cursor on a stored procedure that has anything other than a single select statement in it". Using SQL_CUR_USE_ODBC may avoid that error. Also, some drivers don't support the optional row_number parameter in odbc_fetch_row(). SQL_CUR_USE_ODBC might help in that case, too.
odbc_pconnect
(PHP 4, PHP 5)
odbc_pconnect — Ouvre une connexion persistante à une source de données
Description
resource odbc_pconnect
( string
$dsn
, string $user
, string $password
[, int $cursor_type
] )Ouvre une connexion persistante à une source de données.
odbc_pconnect() se comporte de manière similaire
à odbc_connect(), mais la connexion ouverte
n'est pas vraiment terminée lorsque le script est achevé. Les prochaines
requêtes qui se feront sur une connexion dont les
dsn, user,
password sont les mêmes que celle-ci (avec
odbc_connect() et odbc_pconnect())
réutiliseront la connexion ouverte.
Liste de paramètres
Voir la fonction odbc_connect() pour plus de détails.
Valeurs de retour
Retourne un identifiant de connexion ODBC, ou 0 (FALSE) si une erreur
survient.
Notes
Note: Les connexions persistantes n'ont aucun effet si PHP est utilisé comme CGI.
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User Contributed Notes
odbc_pconnect - [4 notes]
etsai at email dot com ¶
12 years ago
alberici at to dot infn dot it ¶
10 years ago
I saw that closing an ODBC persistent connection opened with odbc_pconnect() with odbc_close() doesnt work. Someone here have proposed using odbc_close_all() but wouldnt that close all persistent connections (also others ones !!!) ? What about catching a persistent handle with odbc_connect() and then closing the connection with odbc_close() ? If there are no available handles (for some reason the last pconn has been closed) this approach opens and close a normal single-script connection. Waiting comments...
j_schrab at execpc dot com ¶
12 years ago
Ok, learning time. As I was told by the PHP-DevTeam...
Multiple connections are supported, but when you try to connect with exactly the same parameters, an existing
connection will be reused, leading to the behaviour you see.
You can simply omit the calls to odbc_close() since
connections get closed on script termination anyway or better:
Consider making your connection id a global variable or pass
it to your functions.
wls at wwco dot com ¶
12 years ago
I found that using odbc_close($odbchandle) on a connection opened by odbc_pconnect() causes a warning "not a valid ODBC-Link resource". So you can't just change odbc_connect() to odbc_pconnect() and expect things to work without warning messages. However, you can use odbc_close_all() and not get a warning.