<listitem>

<para>

Returns the number of rows (tuples) in the query result. Because

it returns an integer result, large result sets might overflow the

return value on 32-bit operating systems.

Returns the number of rows (tuples) in the query result.

(Note that <structname>PGresult</> objects are limited to no more

than <literal>INT_MAX</> rows, so an <type>int</> result is

sufficient.)

<synopsis>

int PQntuples(const PGresult *res);