node/metabase: Fix omission of some entries with prim PREFIX filter

Previously, when filter was `PREFIX` with integer value, metabase
iterator processed int entries only.

This makes the iterator to start from integers entries, and, once they
are finished, then jump over to the rest ones. The approach is reused
from `!=` matcher fix in d189ad6.

Refs #3131. Refs #3058.

Signed-off-by: Leonard Lyubich <leonard@morphbits.io>

pkg/local_object_storage/metabase/metadata.go

@@ -283,7 +283,7 @@ func (db *DB) searchTx(tx *bbolt.Tx, cnr cid.ID, fs object.SearchFilters, fInt m
 		valID := cursor.Key[cursor.ValIDOff:]
 		prevResPrimVal, prevResOID = valID[:len(valID)-oid.Size], valID[len(valID)-oid.Size:]
 	} else {
-		if primMatcher == object.MatchStringEqual || primMatcher == object.MatchCommonPrefix ||
+		if primMatcher == object.MatchStringEqual ||
 			primMatcher == object.MatchNumGT || primMatcher == object.MatchNumGE {
 			var err error
 			if primSeekKey, primSeekPrefix, err = seekKeyForAttribute(primAttr, primVal); err != nil {
@@ -293,6 +293,11 @@ func (db *DB) searchTx(tx *bbolt.Tx, cnr cid.ID, fs object.SearchFilters, fInt m
 			jump = !intPrimMatcher
 			primSeekKey = slices.Concat([]byte{metaPrefixAttrIDInt}, []byte(primAttr), utf8Delimiter)
 			primSeekPrefix = primSeekKey
+			if primMatcher == object.MatchCommonPrefix && primVal != "-" {
+				if _, ok := new(big.Int).SetString(primVal, 10); !ok { // none of int match this
+					primSeekKey[0], jump = metaPrefixAttrIDPlain, false
+				}
+			}
 		}
 	}
 

pkg/local_object_storage/metabase/metadata_test.go

@@ -1012,7 +1012,6 @@ func TestDB_SearchObjects(t *testing.T) {
 					})
 				})
 				t.Run("PREFIX", func(t *testing.T) {
-					t.Skip("https://github.com/nspcc-dev/neofs-node/issues/3131")
 					t.Run("negative", func(t *testing.T) {
 						check := func(t testing.TB, val string) {
 							check(t, object.MatchCommonPrefix, val, 0, 1)