- Documentation Library
- Table of Contents
- MySQL 5.0 Manual
- Table of Contents
- 24.2.3 Descripción de funciones de la API C
- 24.2.3.1 mysql_affected_rows()
- 24.2.3.2 mysql_change_user()
- 24.2.3.3 mysql_character_set_name()
- 24.2.3.4 mysql_close()
- 24.2.3.5 mysql_connect()
- 24.2.3.6 mysql_create_db()
- 24.2.3.7 mysql_data_seek()
- 24.2.3.8 mysql_debug()
- 24.2.3.9 mysql_drop_db()
- 24.2.3.10 mysql_dump_debug_info()
- 24.2.3.11 mysql_eof()
- 24.2.3.12 mysql_errno()
- 24.2.3.13 mysql_error()
- 24.2.3.14 mysql_escape_string()
- 24.2.3.15 mysql_fetch_field()
- 24.2.3.16 mysql_fetch_fields()
- 24.2.3.17 mysql_fetch_field_direct()
- 24.2.3.18 mysql_fetch_lengths()
- 24.2.3.19 mysql_fetch_row()
- 24.2.3.20 mysql_field_count()
- 24.2.3.21 mysql_field_seek()
- 24.2.3.22 mysql_field_tell()
- 24.2.3.23 mysql_free_result()
- 24.2.3.24 mysql_get_character_set_info()
- 24.2.3.25 mysql_get_client_info()
- 24.2.3.26 mysql_get_client_version()
- 24.2.3.27 mysql_get_host_info()
- 24.2.3.28 mysql_get_proto_info()
- 24.2.3.29 mysql_get_server_info()
- 24.2.3.30 mysql_get_server_version()
- 24.2.3.31 mysql_hex_string()
- 24.2.3.32 mysql_info()
- 24.2.3.33 mysql_init()
- 24.2.3.34 mysql_insert_id()
- 24.2.3.35 mysql_kill()
- 24.2.3.36 mysql_library_init()
- 24.2.3.37 mysql_library_end()
- 24.2.3.38 mysql_list_dbs()
- 24.2.3.39 mysql_list_fields()
- 24.2.3.40 mysql_list_processes()
- 24.2.3.41 mysql_list_tables()
- 24.2.3.42 mysql_num_fields()
- 24.2.3.43 mysql_num_rows()
- 24.2.3.44 mysql_options()
- 24.2.3.45 mysql_ping()
- 24.2.3.46 mysql_query()
- 24.2.3.47 mysql_real_connect()
- 24.2.3.48 mysql_real_escape_string()
- 24.2.3.49 mysql_real_query()
- 24.2.3.50 mysql_reload()
- 24.2.3.51 mysql_row_seek()
- 24.2.3.52 mysql_row_tell()
- 24.2.3.53 mysql_select_db()
- 24.2.3.54 mysql_set_character_set()
- 24.2.3.55 mysql_set_server_option()
- 24.2.3.56 mysql_shutdown()
- 24.2.3.57 mysql_sqlstate()
- 24.2.3.58 mysql_ssl_set()
- 24.2.3.59 mysql_stat()
- 24.2.3.60 mysql_store_result()
- 24.2.3.61 mysql_thread_id()
- 24.2.3.62 mysql_use_result()
- 24.2.3.63 mysql_warning_count()
- 24.2.3.64 mysql_commit()
- 24.2.3.65 mysql_rollback()
- 24.2.3.66 mysql_autocommit()
- 24.2.3.67 mysql_more_results()
- 24.2.3.68 mysql_next_result()
int mysql_ping(MYSQL *mysql)
Description
Checks whether the connection to the server is working. If the connection has gone down, an automatic reconnection is attempted.
This function can be used by clients that remain idle for a long while, to check whether the server has closed the connection and reconnect if necessary.
Return Values
Zero if the connection to the server is alive. Non-zero if an error occurred. A non-zero return does not indicate whether the MySQL server itself is down; the connection might be broken for other reasons such as network problems.
Errors
-
CR_COMMANDS_OUT_OF_SYNCCommands were executed in an improper order.
-
CR_SERVER_GONE_ERRORThe MySQL server has gone away.
-
CR_UNKNOWN_ERRORAn unknown error occurred.
Ésta es una traducción del manual de referencia de MySQL, que puede encontrarse en dev.mysql.com. El manual de referencia original de MySQL está escrito en inglés, y esta traducción no necesariamente está tan actualizada como la versión original. Para cualquier sugerencia sobre la traducción y para señalar errores de cualquier tipo, no dude en dirigirse a mysql-es@vespito.com.
