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MDEV-4435 Server crashes in my_strcasecmp_utf8 on ADD KEY IF NOT EXISTS with implicit name when the key exists.

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Use field name as a key name if the key name wasn't specified.
This commit is contained in:
Alexey Botchkov
2013-11-11 18:23:53 +04:00
parent 07d3fc5220
commit 3cf7e283a6
3 changed files with 31 additions and 3 deletions
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19
sql/sql_table.cc
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@ -5389,17 +5389,29 @@ handle_if_exists_options(THD *thd, TABLE *table, Alter_info *alter_info)
Key *key;
List_iterator<Key> key_it(alter_info->key_list);
uint n_key;
const char *keyname;
while ((key=key_it++))
{
if (!key->create_if_not_exists)
continue;
/* If the name of the key is not specified, */
/* let us check the name of the first key part. */
if ((keyname= key->name.str) == NULL)
{
List_iterator<Key_part_spec> part_it(key->columns);
Key_part_spec *kp;
if ((kp= part_it++))
keyname= kp->field_name.str;
if (keyname == NULL)
continue;
}
for (n_key=0; n_key < table->s->keys; n_key++)
{
if (my_strcasecmp(system_charset_info,
key->name.str, table->key_info[n_key].name) == 0)
keyname, table->key_info[n_key].name) == 0)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_NOTE,
ER_DUP_KEYNAME, ER(ER_DUP_KEYNAME), key->name.str);
ER_DUP_KEYNAME, ER(ER_DUP_KEYNAME), keyname);
key_it.remove();
if (key->type == Key::FOREIGN_KEY)
{
@ -7924,7 +7936,8 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
if (alter_info->flags == 0)
{
my_snprintf(alter_ctx.tmp_name, sizeof(alter_ctx.tmp_name),
ER(ER_INSERT_INFO), 0L, 0L, 0L);
ER(ER_INSERT_INFO), 0L, 0L,
thd->get_stmt_da()->current_statement_warn_count());
my_ok(thd, 0L, 0L, alter_ctx.tmp_name);
DBUG_RETURN(false);
}