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28.7.7.49 mysql_num_rows()
uint64_t mysql_num_rows(MYSQL_RES *result)
Description
Returns the number of rows in the result set.
The use of mysql_num_rows()
depends on whether you use
mysql_store_result() or
mysql_use_result() to return
the result set. If you use
mysql_store_result(),
mysql_num_rows() may be called
immediately. If you use
mysql_use_result(),
mysql_num_rows() does not
return the correct value until all the rows in the result set
have been retrieved.
mysql_num_rows() is intended
for use with statements that return a result set, such as
SELECT. For statements such as
INSERT,
UPDATE, or
DELETE, the number of affected
rows can be obtained with
mysql_affected_rows().
Document created the 26/06/2006, last modified the 26/10/2018
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