POINTN
Sintassi
PointN(ls, N)
Spiegazione
Restituisce l'oggetto Point numero N
nel valore LineString ls
.
I punti sono numerati a partire da 1
.
Esempi
MariaDB [(none)]> SET @ls = 'LineString(1 1,2 2,3 3)'; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> SELECT AsText(PointN(GeomFromText(@ls),2)); +-------------------------------------+ | AsText(PointN(GeomFromText(@ls),2)) | +-------------------------------------+ | POINT(2 2) | +-------------------------------------+ 1 row in set (0.00 sec)
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