BUG #7911: Equal vertices are not identified

From: dgplinux(at)yahoo(dot)com
To: pgsql-bugs(at)postgresql(dot)org
Subject: BUG #7911: Equal vertices are not identified
Date: 2013-03-01 10:01:08
Message-ID: E1UBMm4-0005z1-JO@wrigleys.postgresql.org
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The following bug has been logged on the website:

Bug reference: 7911
Logged by: ST_Intersection and Equal to operator does not work consistently
Email address: dgplinux(at)yahoo(dot)com
PostgreSQL version: 9.2.0
Operating system: Windows XP ,Windows 7
Description:

The point below has equal x,y values with 3 Lines.
ST_Intersection & '=' operator returns only 2 of them

POINT(-115.170246909479 36.0755731954767)

LINESTRING(-115.16886866056 36.0749632293696,-115.169344063777
36.0751335573678,-115.170006424357 36.0754963465793,-115.170246909479
36.0755731954767)

LINESTRING(-115.170246909479 36.0755731954767,-115.169804424035
36.0763443739938)

LINESTRING(-115.170246909479 36.0755731954767,-115.170474133874
36.07567333046,-115.170951106408 36.0759910051809,-115.170983532364
36.076342785791)

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