mariadb_stmt_execute_direct
Syntax
int mariadb_stmt_execute_direct(MYSQL_STMT * stmt, const char *query, size_t length);
stmt
- A statement handle, which was previously allocated by mysql_stmt_init().query
SQL statementlength
Length of SQL statement
Description
Prepares and executes a statement which was previously allocated by mysql_stmt_init(), using the current values of the parameter variables if any parameters exist in the statement.
Returns zero on success, non-zero on failure.
This function was added in Connector/C 3.0 and requires MariaDB 10.2 or later versions.
- Since the number of parameter of the statement is unknown before execution it is mandatory to set the number of parameters via the mysql_stmt_attr_set() 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.
See Also
Example
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_direct(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_PREBIND_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\n", mysql_stmt_error(stmt)); mysql_stmt_close(stmt); return 1; }
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