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Bug #27164: not reseting the data pointer

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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.
This commit is contained in:
gkodinov/kgeorge@magare.gmz[kgeorge]
2007-03-26 13:17:40 +03:00
parent 1d0efa1757
commit e6d81ad338
3 changed files with 15 additions and 1 deletions
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2
sql/field.h
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@ -1115,7 +1115,7 @@ public:
int store(const char *to, uint length, CHARSET_INFO *charset);
int store(double nr) { return 1; }
int store(longlong nr) { return 1; }
int reset(void) { return !maybe_null(); }
int reset(void) { return !maybe_null() || Field_blob::reset(); }
void get_key_image(char *buff,uint length, CHARSET_INFO *cs,imagetype type);
void set_key_image(char *buff,uint length, CHARSET_INFO *cs);