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Re: point(lseg,lseg) does not exist

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Shane wrote:

Hi,

I am attempting a query using lseg values to find the point
of intersection.  The following query taken from the PG
manual isn't working over here.

select
point(lseg '((-1,0),(1,0))', lseg
'((-2,-2),(2,2))')
ERROR:  function point(lseg, lseg) does not exist
HINT:  No function matches the given name and argument
types. You may need to add explicit type casts.

Do I need to declare this function somewhere?  Pg version
7.4.7 (debian rev 6 Sarge).

Best regards,
Shane


Shane,

The operator for determining the intersection of two lsegs is #; thus,

select lseg # lseg

and the result is the intersection point.

Don

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