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Given a field numberfieldnr for a column within a result set, returns that column's field definition as aMYSQL_FIELD structure. Use this function to retrieve the definition for an arbitrary column. Specify a value forfieldnr in the range from 0 tomysql_num_fields(result)-1.

For metadata-optional connections, this function returnsNULL when theresultset_metadata system variable is set toNONE. To check whether a result set has metadata, use themysql_result_metadata() function. For details about managing result set metadata transfer, seeSection 3.6.7, “Optional Result Set Metadata”.

TheMYSQL_FIELD structure for the specified column.NULL if the result set has no metadata.

None.

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);}