a fix (Bug #2298: Trailing whitespace inconsistently handled in WHERE clause)

myisam/mi_key.c

@@ -62,7 +62,7 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
       end=pos+length;
       if (type != HA_KEYTYPE_NUM)
       {
-	while (end > pos && end[-1] == ' ')
+	while (end > pos && (end[-1] == ' ' || end[-1] == '\t'))
 	  end--;
       }
       else
@@ -186,7 +186,7 @@ uint _mi_pack_key(register MI_INFO *info, uint keynr, uchar *key, uchar *old,
       end=pos+length;
       if (type != HA_KEYTYPE_NUM)
       {
-	while (end > pos && end[-1] == ' ')
+	while (end > pos && (end[-1] == ' ' || end[-1] == '\t'))
 	  end--;
       }
       else

myisam/mi_search.c

@@ -795,9 +795,9 @@ int _mi_key_cmp(register MI_KEYSEG *keyseg, register uchar *a,
 	uint length=(uint) (end-a), a_length=length, b_length=length;
 	if (!(nextflag & SEARCH_PREFIX))
 	{
-	  while (a_length && a[a_length-1] == ' ')
+	  while (a_length && (a[a_length-1] == ' ' || a[a_length-1] == '\t'))
 	    a_length--;
-	  while (b_length && b[b_length-1] == ' ')
+	  while (b_length && (b[b_length-1] == ' ' || b[b_length-1] == '\t'))
 	    b_length--;
 	}
         if (piks &&
@@ -849,9 +849,9 @@ int _mi_key_cmp(register MI_KEYSEG *keyseg, register uchar *a,
 
 	if (!(nextflag & (SEARCH_PREFIX | SEARCH_UPDATE)))
 	{
-	  while (a_length && a[a_length-1] == ' ')
+	  while (a_length && (a[a_length-1] == ' ' || a[a_length-1] == '\t'))
 	    a_length--;
-	  while (b_length && b[b_length-1] == ' ')
+	  while (b_length && (b[b_length-1] == ' ' || b[b_length-1] == '\t'))
 	    b_length--;
 	}
         if (piks &&