Time-related functions for getting started with MySQL
The binary protocol allows you to send and receive date and time values (DATE, TIME, DATETIME and TIMESTAMP) using the MYSQL_TIME structure. The members of this structure are described in Section 25.2.5, “Data Types for C API Prepared Statements”.
To send temporary data values, you can use mysql_stmt_prepare() to create a prepared statement. Then, before calling mysql_stmt_execute() to execute the statement, you can use the following steps to set each temporary parameter:
In the MYSQL_BIND structure related to the data value, set the buffer_type member to the corresponding type, which specifies The type of temporary value sent. For DATE, TIME, DATETIME, or TIMESTAMP values, set buffer_type to MYSQL_TYPE_DATE, MYSQL_TYPE_TIME, MYSQL_TYPE_DATETIME, or MYSQL_TYPE_TIMESTAMP respectively.
Set the buffer member of the MYSQL_BIND structure to the address of the MYSQL_TIME structure used to pass temporary values.
Fill the members of the MYSQL_TIME structure to match the type of temporary support intended to be passed.
Use mysql_stmt_bind_param() to bind parameter data to the statement. Mysql_stmt_execute() can then be called.
To retrieve a temporary value, follow similar steps, but set the buffer_type member to the type of value you intend to accept, and set the buffer member to the address of the MYSQL_TIME structure into which the return value should be placed. . After calling mysql_stmt_execute() and before getting the results, use mysql_bind_results() to bind the buffer to the statement.
Look at the code specifically:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include <mysql/mysql.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <termios.h>
#include <mysql/mysql.h>
int main()
{
int ret = 0, status = 0;
MYSQL *mysql;
MYSQL_RES *result;
mysql =mysql_init(NULL);
mysql =mysql_real_connect(mysql, "localhost", "root", "123456", "mydb2", 0, NULL, CLIENT_MULTI_STATEMENTS );
if (mysql == NULL)
{
ret = mysql_errno(mysql);
printf("%s", mysql_error(mysql));
printf("func mysql_real_connect() err :%d\n", ret);
return ret;
}
else
{
printf(" ok......\n");
}
MYSQL_TIME ts;
MYSQL_BIND bind[3];
MYSQL_STMT *stmt;
//注意：
// 创建的表语句
// create table test_table (date_field date, time_field time, timestamp_field timestamp );
char query[1024] = "INSERT INTO test_table(date_field, time_field, timestamp_field) VALUES(?,?,?)";
stmt = mysql_stmt_init(mysql);
if (!stmt)
{
fprintf(stderr, " mysql_stmt_init(), out of memory\n");
exit(0);
}
if (mysql_stmt_prepare(stmt, query, strlen(query)))
{
fprintf(stderr, "\n mysql_stmt_prepare(), INSERT failed");
fprintf(stderr, "\n %s", mysql_stmt_error(stmt));
exit(0);
}
/* set up input buffers for all 3 parameters */
bind[0].buffer_type= MYSQL_TYPE_DATE;
bind[0].buffer= (char *)&ts;
bind[0].is_null= 0;
bind[0].length= 0;
//
bind[1]= bind[2]= bind[0];
//...
mysql_stmt_bind_param(stmt, bind);
/* supply the data to be sent in the ts structure */
ts.year= 2002;
ts.month= 02;
ts.day= 03;
ts.hour= 10;
ts.minute= 45;
ts.second= 20;
mysql_stmt_execute(stmt);
// Close the statement //
if (mysql_stmt_close(stmt))
{
fprintf(stderr, " failed while closing the statement\n");
fprintf(stderr, " %s\n", mysql_stmt_error(stmt));
exit(0);
}
mysql_close(mysql);
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