17.3. C API Datatypes
Here is a list of C API data types from the
mysql.h header file:
MYSQL
A database handle structure created by
mysql_init( ) and released with
mysql_close( ).MYSQL_RES
A structure for a results set from an SQL query. This
structure is used by fetch functions and is released with
mysql_free_result( ).MYSQL_ROW
A structure for holding a row of data from a results set. The
data is retrieved from this structure by the
mysql_fetch_row( ) function.MYSQL_FIELD
A structure for holding an array of information about a field
of a results set. The array may be set with the
mysql_fetch_field( ) function. The elements
include name, table, and
def for the default value.MYSQL_FIELD_OFFSET
Used for recording a pointer location for a results set. The
offset value can be retrieved by the
mysql_row_tell( ) function and deployed with
mysql_row_seek( ).my_ulonglong
A variable type for storing the number of rows for functions
such as mysql_affected_rows( ),
mysql_num_rows( ), and
mysql_insert_id( ). To print the value of a
variable using this type, copy the value to another variable that
uses the unsigned long type.
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