Available in versions: Dev (3.18) | Latest (3.17) | 3.16

ST_NumPoints

Applies to ❌ Open Source Edition   ✅ Express Edition   ✅ Professional Edition   ✅ Enterprise Edition

This function returns the number of points on a linestring geometry. For example:

create.select(stNumPoints(stGeomFromText("LINESTRING (0 0, 0 1, 1 1, 1 2)"))).fetch();

The result being, for example

+--------------+
| ST_NumPoints |
+--------------+
| 4            |
+--------------+

To access the Nth point (1-based), use ST_PointN.

Dialect support

This example using jOOQ:

stNumPoints(geometry)

Translates to the following dialect specific expressions:

-- AURORA_MYSQL, AURORA_POSTGRES, COCKROACHDB, MARIADB, MYSQL, ORACLE, POSTGRES, REDSHIFT
st_numpoints(geometry)

-- SQLSERVER
geometry.STNumPoints()

-- ACCESS, ASE, BIGQUERY, DB2, DERBY, EXASOL, FIREBIRD, H2, HANA, HSQLDB, INFORMIX, MEMSQL, SNOWFLAKE, SQLDATAWAREHOUSE, 
-- SQLITE, SYBASE, TERADATA, VERTICA, YUGABYTEDB
/* UNSUPPORTED */

(These are currently generated with jOOQ 3.18, see #10141), or translate your own on our website

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