Oracle 5.0 Reference Manual page 2195

Return Values
Zero if the statement was successful. Nonzero if an error occurred.
Errors
•
CR_COMMANDS_OUT_OF_SYNC
Commands were executed in an improper order.
•
CR_SERVER_GONE_ERROR
The MySQL server has gone away.
•
CR_SERVER_LOST
The connection to the server was lost during the query.
•
CR_UNKNOWN_ERROR
An unknown error occurred.
20.6.6.52.
mysql_real_connect()
MYSQL *mysql_real_connect(MYSQL *mysql, const char *host, const char
*user, const char *passwd, const char *db, unsigned int port, const char
*unix_socket, unsigned long client_flag)
Description
mysql_real_connect()
host. mysql_real_connect()
functions that require a valid
The parameters are specified as follows:
• For the first parameter, specify the address of an existing
mysql_real_connect(), call
change a lot of connect options with the
"mysql_options()".
• The value of
"localhost", a connection to the local host is assumed. For Windows, the client connects
using a shared-memory connection, if the server has shared-memory connections enabled.
Otherwise, TCP/IP is used. For Unix, the client connects using a Unix socket file. For local
connections, you can also influence the type of connection to use with the
or
MYSQL_OPT_NAMED_PIPE
supported by the server. For a
pipe, if the server has named-pipe connections enabled. If named-pipe connections are not enabled,
an error occurs.
• The
user
the current user is assumed. Under Unix, this is the current login name. Under Windows ODBC, the
current user name must be specified explicitly. See the Connector/ODBC section of
Connectors and
• The
passwd
table for the user that have a blank (empty) password field are checked for a match. This enables the
database administrator to set up the MySQL privilege system in such a way that users get different
privileges depending on whether they have specified a password.
C API Function Descriptions
[2942]
[2942]
[2942]
[2941]
attempts to establish a connection to a MySQL database engine running on
must complete successfully before you can execute any other API
MYSQL
mysql_init()
may be either a host name or an IP address. If
host
options to mysql_options(). The type of connection must be
host
parameter contains the user's MySQL login ID. If
APIs.
parameter contains the password for user. If
connection handle structure.
to initialize the
mysql_options()
value of on Windows, the client connects using a named
"."
2175
structure. Before calling
MYSQL
structure. You can
MYSQL
call. See Section 20.6.6.49,
is
host NULL
MYSQL_OPT_PROTOCOL
is or the empty string "",
user NULL
is NULL, only entries in the
passwd
or the string
Chapter 20,
user