Documentation Home
MySQL 5.7 Reference Manual
Related Documentation Download this Manual
PDF (US Ltr) - 33.9Mb
PDF (A4) - 34.0Mb
PDF (RPM) - 33.2Mb
EPUB - 8.5Mb
HTML Download (TGZ) - 8.2Mb
HTML Download (Zip) - 8.2Mb
HTML Download (RPM) - 7.1Mb
Eclipse Doc Plugin (TGZ) - 9.0Mb
Eclipse Doc Plugin (Zip) - 11.1Mb
Man Pages (TGZ) - 219.4Kb
Man Pages (Zip) - 322.3Kb
Info (Gzip) - 3.2Mb
Info (Zip) - 3.2Mb
Excerpts from this Manual

MySQL 5.7 Reference Manual  /  ...  /  GeometryCollection Property Functions

12.15.7.5 GeometryCollection Property Functions

These functions return properties of GeometryCollection values.

  • GeometryN(gc,N)

    ST_GeometryN() and GeometryN() are synonyms. For more information, see the description of ST_GeometryN().

    GeometryN() is deprecated as of MySQL 5.7.6 and will be removed in a future MySQL release. Use ST_GeometryN() instead.

  • NumGeometries(gc)

    ST_NumGeometries() and NumGeometries() are synonyms. For more information, see the description of ST_NumGeometries().

    NumGeometries() is deprecated as of MySQL 5.7.6 and will be removed in a future MySQL release. Use ST_NumGeometries() instead.

  • ST_GeometryN(gc,N)

    Returns the N-th geometry in the GeometryCollection value gc. Geometries are numbered beginning with 1.

    mysql> SET @gc = 'GeometryCollection(Point(1 1),LineString(2 2, 3 3))';
    mysql> SELECT ST_AsText(ST_GeometryN(ST_GeomFromText(@gc),1));
    +-------------------------------------------------+
    | ST_AsText(ST_GeometryN(ST_GeomFromText(@gc),1)) |
    +-------------------------------------------------+
    | POINT(1 1)                                      |
    +-------------------------------------------------+
    

    ST_GeometryN() and GeometryN() are synonyms.

  • ST_NumGeometries(gc)

    Returns the number of geometries in the GeometryCollection value gc.

    mysql> SET @gc = 'GeometryCollection(Point(1 1),LineString(2 2, 3 3))';
    mysql> SELECT ST_NumGeometries(ST_GeomFromText(@gc));
    +----------------------------------------+
    | ST_NumGeometries(ST_GeomFromText(@gc)) |
    +----------------------------------------+
    |                                      2 |
    +----------------------------------------+
    

    ST_NumGeometries() and NumGeometries() are synonyms.


User Comments
Sign Up Login You must be logged in to post a comment.