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Rechercher dans le manuel MySQL
28. 7. 7. 18 mysql _fetch _field _direct ()
MYSQL_FIELD *mysql_fetch_field_direct(MYSQL_RES
*result, unsigned int fieldnr)
Description
Given a field number fieldnr
for a column
within a result set, returns that column's field definition as
a MYSQL_FIELD
structure. Use this function
to retrieve the definition for an arbitrary column. Specify a
value for fieldnr
in the range from 0 to
mysql_num_fields(result)-1
.
For metadata-optional connections, this function returns
NULL
when the
resultset_metadata
system
variable is set to NONE
. To check whether a
result set has metadata, use the
mysql_result_metadata()
function. For details about managing result set metadata
transfer, see Section 28.7.27, “C API Optional Result Set Metadata”.
The MYSQL_FIELD
structure for the specified
column. NULL
if the result set has no
metadata.
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