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Fix for bug #23254: COMPRESS(NULL) makes all futher COMPRESS() calls on same Item return NULL

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We don't set null_value to 0 in the Item_func_compress::val_str() for 
not-NULL results.


mysql-test/r/func_compress.result:
  Fix for bug #23254: COMPRESS(NULL) makes all futher COMPRESS() calls on same Item return NULL
    - test result.
mysql-test/t/func_compress.test:
  Fix for bug #23254: COMPRESS(NULL) makes all futher COMPRESS() calls on same Item return NULL
    - test case.
sql/item_strfunc.cc:
  Fix for bug #23254: COMPRESS(NULL) makes all futher COMPRESS() calls on same Item return NULL
    - set null_value.
This commit is contained in:
unknown 2006-10-13 19:05:54 +05:00
commit 60a21d1697
3 changed files with 24 additions and 1 deletions
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sql/item_strfunc.cc
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@ -2838,6 +2838,7 @@ String *Item_func_compress::val_str(String *str)
null_value= 1;
return 0;
}
null_value= 0;
if (res->is_empty()) return res;
/*