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Bug #27164: not reseting the data pointer
to 0 causes wrong (large) length to be read from the row in _mi_calc_blob_length() when storing NULL values in (e.g) POINT columns. This large length is then used to allocate a block of memory that (on some OSes) causes trouble. Fixed by calling the base class's Field_blob::reset() from Field_geom::reset() that is called when storing a NULL value into the column.
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@ -718,4 +718,10 @@ point(b, b) IS NULL linestring(b) IS NULL polygon(b) IS NULL multipoint(b) IS NU
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1 1 1 1 1 1 1
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0 1 1 1 1 1 1
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drop table t1;
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CREATE TABLE t1(a POINT) ENGINE=MyISAM;
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INSERT INTO t1 VALUES (NULL);
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SELECT * FROM t1;
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a
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NULL
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DROP TABLE t1;
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End of 4.1 tests
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@ -411,4 +411,12 @@ from t1;
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drop table t1;
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#
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# Bug #27164: Crash when mixing InnoDB and MyISAM Geospatial tables
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#
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CREATE TABLE t1(a POINT) ENGINE=MyISAM;
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INSERT INTO t1 VALUES (NULL);
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SELECT * FROM t1;
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DROP TABLE t1;
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--echo End of 4.1 tests
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@ -1115,7 +1115,7 @@ public:
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int store(const char *to, uint length, CHARSET_INFO *charset);
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int store(double nr) { return 1; }
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int store(longlong nr) { return 1; }
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int reset(void) { return !maybe_null(); }
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int reset(void) { return !maybe_null() || Field_blob::reset(); }
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void get_key_image(char *buff,uint length, CHARSET_INFO *cs,imagetype type);
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void set_key_image(char *buff,uint length, CHARSET_INFO *cs);
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