satellite/metainfo/metabase: fix segment listing with cursor.Part

Change-Id: I910888d435b11d2d4687ea0042998a1078cd6443

satellite/metainfo/metabase/list_segments.go

@@ -55,7 +55,7 @@ func (db *DB) ListSegments(ctx context.Context, opts ListSegments) (result ListS
 		FROM segments
 		WHERE
 			stream_id = $1 AND
-			($2 = 0 OR position > $2)
+			($2 = 0::INT8 OR position > $2)
 		ORDER BY position ASC
 		LIMIT $3
 	`, opts.StreamID, opts.Cursor, opts.Limit+1))(func(rows tagsql.Rows) error {

satellite/metainfo/metabase/list_segments_test.go

@@ -132,6 +132,20 @@ func TestListSegments(t *testing.T) {
 				},
 			}.Check(ctx, t, db)
 
+			ListSegments{
+				Opts: metabase.ListSegments{
+					StreamID: obj.StreamID,
+					Limit:    2,
+					Cursor: metabase.SegmentPosition{
+						Part:  1,
+						Index: 10,
+					},
+				},
+				Result: metabase.ListSegmentsResult{
+					More: false,
+				},
+			}.Check(ctx, t, db)
+
 			Verify{
 				Objects: []metabase.RawObject{
 					metabase.RawObject(expectedObject),