ST_NumGeometries
Applies to ❌ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
This function returns the number of interior rings of a polygon geometry.
create.select(stNumGeometries(stGeomFromText("MULTIPOINT ((-1 -1), (1 -1), (1 1), (-1 1))"))).fetch();
The result being, for example
+------------------+ | ST_NumGeometries | +------------------+ | 4 | +------------------+
stNumGeometries(geometry)
Translates to the following dialect specific expressions:
Aurora MySQL, Aurora Postgres, CockroachDB, DuckDB, MariaDB, MySQL, Postgres, Redshift, Snowflake
st_numgeometries(geometry)
Oracle
sdo_util.getnumelem(geometry)
SQLServer
geometry.STNumGeometries()
ASE, Access, BigQuery, ClickHouse, DB2, Derby, Exasol, Firebird, H2, HSQLDB, Hana, Informix, MemSQL, SQLDataWarehouse, SQLite, Sybase, Teradata, Trino, Vertica, YugabyteDB
/* UNSUPPORTED */
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