MultiLineString Functions

These functions return properties of MultiLineString values.

• GLength(mls)

  Returns as a double-precision number the length of the MultiLineString value mls. The length of mls is equal to the sum of the lengths of its elements.

  mysql> SET @mls = 'MultiLineString((1 1,2 2,3 3),(4 4,5 5))';
  mysql> SELECT GLength(GeomFromText(@mls));
  +-----------------------------+
  | GLength(GeomFromText(@mls)) |
  +-----------------------------+
  | 4.2426406871193 |
  +-----------------------------+
  

  GLength() is a nonstandard name. It corresponds to the OpenGIS Length() function.

• IsClosed(mls)

  Returns 1 if the MultiLineString value mls is closed (that is, the StartPoint() and EndPoint() values are the same for each LineString in mls). Returns 0 if mls is not closed, and -1 if it is NULL.

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