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Fix for bug #26038: X() value of empty NOT NULL POINT is neither NULL nor NOT NULL

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Having maybe_null flag unset for geometry/spatial functions leads to
wrong Item_func_isnull::val_int()'s results.
Fix: set maybe_null flag and add is_null() methods.


mysql-test/r/gis.result:
  Fix for bug #26038: X() value of empty NOT NULL POINT is neither NULL nor NOT NULL
    - test result.
mysql-test/t/gis.test:
  Fix for bug #26038: X() value of empty NOT NULL POINT is neither NULL nor NOT NULL
    - test case.
sql/item_geofunc.cc:
  Fix for bug #26038: X() value of empty NOT NULL POINT is neither NULL nor NOT NULL
    - set maybe_null flag for Item_geometry_func and Item_func_as_wkt.
    - moved length check to the beginnig of the 
      Item_func_spatial_collection::val_str() to affect geometry 
      collection objects at once.
    - changed Item_func_isempty::val_int() and Item_func_issimple::val_int()
      to properly handle null_value.
sql/item_geofunc.h:
  Fix for bug #26038: X() value of empty NOT NULL POINT is neither NULL nor NOT NULL
    - set maybe_null flag for geometry/spatial functions.
    - added is_null() to Item_geometry_func and Item_func_spatial_rel
      classes.
sql/spatial.cc:
  Fix for bug #26038: X() value of empty NOT NULL POINT is neither NULL nor NOT NULL
    - changed return type of Geometry::create_from_wkb() to be 
      consistent with Geometry::create_from_wkt(), now it returns
      Geometry object or NULL in case of error.
sql/spatial.h:
  Fix for bug #26038: X() value of empty NOT NULL POINT is neither NULL nor NOT NULL
    - changed return type of Geometry::create_from_wkb() to be 
      consistent with Geometry::create_from_wkt(), now it returns
      Geometry object or NULL in case of error.
This commit is contained in:
unknown
2007-02-21 14:45:19 +04:00
parent 557f6169b9
commit cbb38476e1
6 changed files with 136 additions and 27 deletions
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36
mysql-test/t/gis.test
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@@ -377,4 +377,38 @@ load data infile '../../std_data/bad_gis_data.dat' into table t1;
alter table t1 enable keys;
drop table t1;
# End of 4.1 tests
#
# Bug #26038: is null and bad data
#
create table t1 (a int, b blob);
insert into t1 values (1, ''), (2, NULL), (3, '1');
select * from t1;
select
geometryfromtext(b) IS NULL, geometryfromwkb(b) IS NULL, astext(b) IS NULL,
aswkb(b) IS NULL, geometrytype(b) IS NULL, centroid(b) IS NULL,
envelope(b) IS NULL, startpoint(b) IS NULL, endpoint(b) IS NULL,
exteriorring(b) IS NULL, pointn(b, 1) IS NULL, geometryn(b, 1) IS NULL,
interiorringn(b, 1) IS NULL, multipoint(b) IS NULL, isempty(b) IS NULL,
issimple(b) IS NULL, isclosed(b) IS NULL, dimension(b) IS NULL,
numgeometries(b) IS NULL, numinteriorrings(b) IS NULL, numpoints(b) IS NULL,
area(b) IS NULL, glength(b) IS NULL, srid(b) IS NULL, x(b) IS NULL,
y(b) IS NULL
from t1;
select
within(b, b) IS NULL, contains(b, b) IS NULL, overlaps(b, b) IS NULL,
equals(b, b) IS NULL, disjoint(b, b) IS NULL, touches(b, b) IS NULL,
intersects(b, b) IS NULL, crosses(b, b) IS NULL
from t1;
select
point(b, b) IS NULL, linestring(b) IS NULL, polygon(b) IS NULL, multipoint(b) IS NULL,
multilinestring(b) IS NULL, multipolygon(b) IS NULL,
geometrycollection(b) IS NULL
from t1;
drop table t1;
--echo End of 4.1 tests