ST_NPOINTS (Lakehouse v1)

Returns the number of points in a GEOMETRY object.

SQL Syntax

ST_NPOINTS(<geometry>)

Aliases

• ST_NUMPOINTS

Arguments

Arguments	Description
<geometry>	The argument must be an expression of type GEOMETRY object.

Return Type

UInt8.

SQL Examples

SELECT ST_NPOINTS(TO_GEOMETRY('POINT(66 12)')) AS npoints

┌─────────┐
│ npoints │
├─────────┤
│       1 │
└─────────┘

SELECT ST_NPOINTS(TO_GEOMETRY('MULTIPOINT((45 21),(12 54))')) AS npoints

┌─────────┐
│ npoints │
├─────────┤
│       2 │
└─────────┘

SELECT ST_NPOINTS(TO_GEOMETRY('LINESTRING(40 60,50 50,60 40)')) AS npoints

┌─────────┐
│ npoints │
├─────────┤
│       3 │
└─────────┘

SELECT ST_NPOINTS(TO_GEOMETRY('MULTILINESTRING((1 1,32 17),(33 12,73 49,87.1 6.1))')) AS npoints

┌─────────┐
│ npoints │
├─────────┤
│       5 │
└─────────┘

SELECT ST_NPOINTS(TO_GEOMETRY('GEOMETRYCOLLECTION(POLYGON((-10 0,0 10,10 0,-10 0)),LINESTRING(40 60,50 50,60 40),POINT(99 11))')) AS npoints

┌─────────┐
│ npoints │
├─────────┤
│       8 │
└─────────┘