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mariadb_stm...ecute_direct(3) MariaDB Connector/C mariadb_stm...ecute_direct(3)
Name
mariadb_stmt_execute_direct - prepares and executes a prepared statement
Synopsis
#include <mysql.h>
int mariadb_stmt_execute_direct(MYSQL_STMT * stmt,
const char *query,
size_t length);
Description
Prepares and executes a statement which was previously allocated by
mysql_stmt_init(3), using the current values of the parameter variables if
any parameters exist in the statement.
Parameters
* stmt - A statement handle, which was previously allocated by
mysql_stmt_init(3).
* query SQL statement
* length Length of SQL statement
Return value
Returns zero on success, non-zero on failure.
Notes
* Since the number of parameter of the statement is unknown before execu-
tion it is mandatory to set the number of parameters via the
mysql_stmt_attr_set(3) function.
* If the SQL statement is a zero-terminated string, you can also pass -1 as
length.
* The statement handle is intended for one-time execution. Reusing the
statement handle might lead to unexpected behavior.
History
This function was added in Connector/C 3.0 and requires MariaDB 10.2 or
later versions.
See Also
* mysql_stmt_attr_set(3)
* mysql_stmt_bind_param(3)
Example
```C static int execute_direct_example(MYSQL mysql) { MYSQL_STMT stmt=
mysql_stmt_init(mysql); MYSQL_BIND bind[2]; int intval= 1; int param_count=
2; char *strval= "execute_direct_example";
/* Direct execution without parameters */ if (mariadb_stmt_execute_di-
rect(stmt, "CREATE TABLE execute_direct (a int, b varchar(30))", -1)) goto
error;
memset(&bind, 0, sizeof(MYSQL_BIND) * 2); bind[0].buffer_type=
MYSQL_TYPE_SHORT; bind[0].buffer= &intval; bind[1].buffer_type=
MYSQL_TYPE_STRING; bind[1].buffer= strval; bind[1].buffer_length=
strlen(strval);
/* set number of parameters */ if (mysql_stmt_attr_set(stmt, STMT_ATTR_PRE-
BIND_PARAMS, ¶m_count)) goto error;
/* bind parameters */ if (mysql_stmt_bind_param(stmt, bind)) goto error;
if (mariadb_stmt_execute_direct(stmt, "INSERT INTO execute_direct VALUES
(?,?)", -1)) goto error;
mysql_stmt_close(stmt); return 0; error: printf("Error: %s", mysql_stmt_er-
ror(stmt)); mysql_stmt_close(stmt); return 1; }
Version 3.4 mariadb_stm...ecute_direct(3)
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