On 27/06/2023 07:32, Japin Li wrote:
Hi,
Commit 6b4d23feef introduces a toplevel field in pgssHashKey, which leads
padding. In pgss_store(), it comments that memset() is required when
pgssHashKey is without padding only.
@@ -1224,9 +1227,14 @@ pgss_store(const char *query, uint64 queryId,
query = CleanQuerytext(query, &query_location, &query_len);
/* Set up key for hashtable search */
+
+ /* memset() is required when pgssHashKey is without padding only */
+ memset(&key, 0, sizeof(pgssHashKey));
+
key.userid = GetUserId();
key.dbid = MyDatabaseId;
key.queryid = queryId;
+ key.toplevel = (exec_nested_level == 0);
/* Lookup the hash table entry with shared lock. */
LWLockAcquire(pgss->lock, LW_SHARED);
However, we need memset() only when pgssHashKey has padding, right?
Yep. I changed the comment to just "clear padding". Thanks!
--
Heikki Linnakangas
Neon (https://neon.tech)
