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added NULLs check to the QUOTE() function

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ram@ram.(none) 2002-08-09 19:36:36 +05:00
parent eebad763f8
commit 390678905b
1 changed files with 8 additions and 4 deletions
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12
sql/item_strfunc.cc
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@ -2085,16 +2085,16 @@ String *Item_func_quote::val_str(String *str)
char *from, *to, *end;
uint delta= 2; /* for beginning and ending ' signs */
if (!arg)
goto null;
for (from= (char*) arg->ptr(), end= from + arg->length(); from < end; from++)
{
if (*(escmask + (*from >> 3)) and (1 << (*from & 7)))
delta++;
}
if (str->alloc(arg->length() + delta))
{
null_value= 1;
return 0;
}
goto null;
to= (char*) str->ptr() + arg->length() + delta - 1;
*to--= '\'';
for (end= (char*) arg->ptr(), from= end + arg->length() - 1; from >= end;
@ -2107,4 +2107,8 @@ String *Item_func_quote::val_str(String *str)
*to= '\'';
str->length(arg->length() + delta);
return str;
null:
null_value= 1;
return 0;
}