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MySQL Build Team authored
> ------------------------------------------------------------ > revno: 2818.1.6 > revision-id: joro@sun.com-20091021084345-iki6z0uceieoupey > parent: ramil@mysql.com-20091023112648-gie6o3odj57cxh1e > committer: Georgi Kodinov <joro@sun.com> > branch nick: B47780-5.0-bugteam > timestamp: Wed 2009-10-21 11:43:45 +0300 > message: > Bug #47780: crash when comparing GIS items from subquery > > If the first argument to GeomFromWKB function is a geometry > field then the function just returns its value. > However in doing so it's not preserving first argument's > null_value flag and this causes unexpected null value to > be returned to the calling function. > > Fixed by updating the null_value of the GeomFromWKB function > in such cases (and all other cases that return a NULL e.g. > because of not enough memory for the return buffer).
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