A small example of how to call MySQL stored procedures with In and out parameters and PHP and Pb

 

The simplest example:

mysql> DELIMITER $$mysql> USE test $$Database changedmysql> DROP PROCEDURE IF EXISTS `sp_add`$$Query OK, 0 rows affected (0.00 sec)mysql> CREATE PROCEDURE sp_add(a INT, b INT,OUT c INT)    -> BEGIN     -> SET c=a+ b;    -> END$$Query OK, 0 rows affected (0.00 sec)mysql> DELIMITER ;

mysql> CALL sp_add (1,2,@c);Query OK, 0 rows affected (0.00 sec)
mysql> SELECT @c;+------+| @c   |+------+|    3 |+------+1 row in set (0.00 sec)
mysql> 

A slightly complex example:

mysql> show create table t_BillNo;+----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+| Table    | Create Table                                                                                                                                                                        |+----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+| t_BillNo | CREATE TABLE `t_billno` (  `SaleNo` bigint(20) DEFAULT NULL,  `bmh` varchar(20) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8 CHECKSUM=1 DELAY_KEY_WRITE=1 ROW_FORMAT=DYNAMIC |+----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+1 row in set (0.00 sec)mysql> select * from t_BillNo;+--------+------+| SaleNo | bmh  |+--------+------+|      1 | 2    ||      4 | 3    ||      4 | 5    ||      7 | 7    ||     12 | 8    |+--------+------+5 rows in set (0.00 sec)mysql> mysql> DELIMITER $$mysql> USE test $$Database changedmysql> DROP PROCEDURE IF EXISTS `sp_GetMaxNumber`$$Query OK, 0 rows affected (0.01 sec)DELIMITER $$USE test $$DROP PROCEDURE IF EXISTS `sp_GetMaxNumber`$$CREATE PROCEDURE sp_GetMaxNumber (IN v_bmh VARCHAR(6), OUT v_MaxNo INT)BEGINSTART TRANSACTION;UPDATE t_BillNoSET SaleNo = IFNULL(SaleNo,0)+1 WHERE bmh = v_bmh;IF @@error_count = 0 THENBEGIN  SELECT Saleno INTO v_MaxNo FROM t_BillNo WHERE bmh = v_bmh;COMMIT;END;ELSEBEGIN     ROLLBACK;     SET v_MaxNo = 0;END;END IF;END$$DELIMITER ;mysql> CREATE PROCEDURE sp_GetMaxNumber (IN v_bmh VARCHAR(6), OUT v_MaxNo INT)    -> BEGIN    -> START TRANSACTION;    -> UPDATE t_BillNo    -> SET SaleNo = IFNULL(SaleNo,0)+1     -> WHERE bmh = v_bmh;    -> IF @@error_count = 0 THEN    -> BEGIN    ->   SELECT Saleno INTO v_MaxNo FROM t_BillNo WHERE bmh = v_bmh;    -> COMMIT;    -> END;    -> ELSE    -> BEGIN    ->      ROLLBACK;    ->      SET v_MaxNo = 0;    -> END;    -> END IF;    -> END$$Query OK, 0 rows affected (0.00 sec)mysql> DELIMITER ;mysql> mysql> call sp_GetMaxNumber(8,@v_MaxNo);Query OK, 0 rows affected (0.00 sec)mysql> select @v_MaxNo;+----------+| @v_MaxNo |+----------+|       12 |+----------+1 row in set (0.00 sec)

How can I call MySQL stored procedures in PHP? I have never tested it. I have used examples from my friends as follows:

$ SQL = "Call test. sp_getmaxnumber (8, @ C );";
Mysql_query ($ SQL); // call the stored procedure of sp_getmaxnumber
$ Result = mysql_query ('select @ C ;');
$ Array = mysql_fetch_array ($ result );
Echo '<PRE>'; print_r ($ array );

 

However, when calling in petabytes, the following error is reported (for example, a netizen from itpub). If you have similar experiences, please share your experience with us:

In the cb_1.click event of the Pb w_main form:

String ls_bmh, ls_errtext
Int li_maxno
Ls_bmh = '000000'

Sp_getmaxnumber (ls_bmh, li_maxno)
Ls_errtext = sqca. sqlerrtext
MessageBox ('error', string (li_maxno) + ''+ sqlca. sqlerrtext)

But the Pb Display Error:
0 sqlstate = 37000
[MySQL] [ODBC 5.1 Driver] You have an error in your SQL syntax; check the manual that corresponds to your MySQL Server version for the right syntax to use near '? = Call sp_getmaxnumber (0, _ GBK '000000') at line 1.