Changeset: 51c55660b7d6 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/51c55660b7d6
Modified Files:
sql/storage/store.c
Branch: iso
Log Message:
Small optimization, test if the next dependency exists in the storage before
adding
diffs (24 lines):
diff --git a/sql/storage/store.c b/sql/storage/store.c
--- a/sql/storage/store.c
+++ b/sql/storage/store.c
@@ -3693,7 +3693,19 @@ transaction_add_hash_entry(sql_hash *h,
.ts = ts
};
- if (!hash_add(h, h->key(next_change), next_change)) {
+ int key = h->key(next_change);
+ sql_hash_e *he = h->buckets[key&(h->size-1)];
+
+ for (; he ; he = he->chain) { /* find if the entry is already present */
+ sql_dependency_change *schange = (sql_dependency_change*)
he->value;
+
+ if (schange->objid == id && schange->ts == ts && schange->type
== tpe) {
+ _DELETE(next_change);
+ return LOG_OK;
+ }
+ }
+
+ if (!hash_add(h, key, next_change)) {
_DELETE(next_change);
return LOG_ERR;
}
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