C API Prepared Statement Function Descriptions
2206
•
CR_OUT_OF_MEMORY
[2942]
Out of memory.
•
CR_SERVER_GONE_ERROR
[2942]
The MySQL server has gone away.
•
CR_SERVER_LOST
[2942]
The connection to the server was lost during the query.
•
CR_UNKNOWN_ERROR
[2941]
An unknown error occurred.
Example
The following example demonstrates how to create and populate a table using
mysql_stmt_init()
,
mysql_stmt_prepare()
,
mysql_stmt_param_count()
,
mysql_stmt_bind_param()
,
mysql_stmt_execute()
, and
mysql_stmt_affected_rows()
. The
mysql
variable is
assumed to be a valid connection handle. For an example that shows how to retrieve data, see
Section 20.6.10.11, “
mysql_stmt_fetch()
”
.
#define STRING_SIZE 50
#define DROP_SAMPLE_TABLE "DROP TABLE IF EXISTS test_table"
#define CREATE_SAMPLE_TABLE "CREATE TABLE test_table(col1 INT,\
col2 VARCHAR(40),\
col3 SMALLINT,\
col4 TIMESTAMP)"
#define INSERT_SAMPLE "INSERT INTO \
test_table(col1,col2,col3) \
VALUES(?,?,?)"
MYSQL_STMT *stmt;
MYSQL_BIND bind[3];
my_ulonglong affected_rows;
int param_count;
short small_data;
int int_data;
char str_data[STRING_SIZE];
unsigned long str_length;
my_bool is_null;
if (mysql_query(mysql, DROP_SAMPLE_TABLE))
{
fprintf(stderr, " DROP TABLE failed\n");
fprintf(stderr, " %s\n", mysql_error(mysql));
exit(0);
}
if (mysql_query(mysql, CREATE_SAMPLE_TABLE))
{
fprintf(stderr, " CREATE TABLE failed\n");
fprintf(stderr, " %s\n", mysql_error(mysql));
exit(0);
}
/* Prepare an INSERT query with 3 parameters */
/* (the TIMESTAMP column is not named; the server */
/* sets it to the current date and time) */
stmt = mysql_stmt_init(mysql);
if (!stmt)
{
fprintf(stderr, " mysql_stmt_init(), out of memory\n");
exit(0);
}
if (mysql_stmt_prepare(stmt, INSERT_SAMPLE, strlen(INSERT_SAMPLE)))
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