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fix for bug #801212 Assertion with ST_INTERSECTION on NULL values

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The ::val_str() method has to return NULL if it calculated
        the null_value, not just set the related flag.

per-file comments:
  mysql-test/r/gis-precise.result
fix for bug #801212 Assertion with ST_INTERSECTION on NULL values
        test result updated.
  mysql-test/t/gis-precise.test
fix for bug #801212 Assertion with ST_INTERSECTION on NULL values
        test case added.
  sql/item_geofunc.cc
fix for bug #801212 Assertion with ST_INTERSECTION on NULL values
        return NULL from the val_str if we get the null_value.
This commit is contained in:
Alexey Botchkov
2011-07-04 16:17:34 +05:00
parent 0e6c889c83
commit 7f55ea1211
3 changed files with 11 additions and 1 deletions
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3
mysql-test/r/gis-precise.result
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@@ -215,3 +215,6 @@ LINESTRING(0 0,1 1)
SELECT Round(ST_Area(ST_BUFFER(MultipointFromText('MULTIPOINT(7 7,3 7,7 2,7 4 ,7 7)'), 3)), 5);
Round(ST_Area(ST_BUFFER(MultipointFromText('MULTIPOINT(7 7,3 7,7 2,7 4 ,7 7)'), 3)), 5)
78.68426
SELECT ST_INTERSECTION(NULL, NULL);
ST_INTERSECTION(NULL, NULL)
NULL