combine function

Returns the combination of geometry a and geometry b.

Syntax

combine( geometry a , geometry b)

Arguments

geometry → geometry geometry → geometry

Example

 geomToWKT( combine( geomFromWKT( 'LINESTRING(3 3 , 4 4 , 5 5 )' ) , geomFromWKT( 'LINESTRING(3 3 , 4 4,  2 1 )' ))  )    → returns MULTILINESTRING((4 4, 2 1), (3 3, 4 4), (4 4, 5 5))

 geomToWKT( combine( geomFromWKT( 'LINESTRING(3 3 , 4 4  )' ) , geomFromWKT( 'LINESTRING(3 3 , 6 6,  2 1 )' ))  )  → returns LINESTRING(3 3, 4 4, 6 6, 2 1)