[ < ] | [ > ] | [ << ] | [ Up ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
From version 4.1, MySQL supports the execution of multiple statements
specified in a single query string. To use this capability with a given
connection, you must specify the CLIENT_MULTI_STATEMENTS
option in
the flags parameter of mysql_real_connect()
when opening the connection. You can also set this for a connection
by calling mysql_set_server_option(MYSQL_OPTION_MULTI_STATEMENTS_ON)
By default, mysql_query()
and mysql_real_query()
return
only the first query status and the subsequent queries status can
be processed using mysql_more_results()
and
mysql_next_result()
.
/* Connect to server with option CLIENT_MULTI_STATEMENTS */ mysql_real_connect(..., CLIENT_MULTI_STATEMENTS); /* Now execute multiple queries */ mysql_query(mysql,"DROP TABLE IF EXISTS test_table;\ CREATE TABLE test_table(id INT);\ INSERT INTO test_table VALUES(10);\ UPDATE test_table SET id=20 WHERE id=10;\ SELECT * FROM test_table;\ DROP TABLE test_table"; do { /* Process all results */ ... printf("total affected rows: %lld", mysql_affected_rows(mysql)); ... if (!(result= mysql_store_result(mysql))) { printf(stderr, "Got fatal error processing query\n"); exit(1); } process_result_set(result); /* client function */ mysql_free_result(result); } while (!mysql_next_result(mysql)); |