27.7.6.18 mysql_fetch_field_direct()

MYSQL_FIELD *mysql_fetch_field_direct(MYSQL_RES *result, unsigned int fieldnr)

Description

给定结果集中某列的字段编号fieldnr，以MYSQL_FIELD结构形式返回该列的字段定义。使用此函数检索任意列的定义。为fieldnr指定一个介于 0 到mysql_num_fields(result)-1范围内的值。

Return Values

指定列的MYSQL_FIELD结构。

Errors

None.

Example

unsigned int num_fields;
unsigned int i;
MYSQL_FIELD *field;

num_fields = mysql_num_fields(result);
for(i = 0; i < num_fields; i++)
{
    field = mysql_fetch_field_direct(result, i);
    printf("Field %u is %s\n", i, field->name);
}