fix: show shards gives empty expiry time for inf duration shards

CHANGELOG.md

@@ -14,6 +14,7 @@
 -	[#21750](https://github.com/influxdata/influxdb/pull/21750): fix: rename arm rpms with yum-compatible names
 -	[#21777](https://github.com/influxdata/influxdb/pull/21777): fix: convert arm arch names for rpms during builds via docker
 -	[#21792](https://github.com/influxdata/influxdb/pull/21792): fix: error instead of panic for statement rewrite failure
+-	[#21795](https://github.com/influxdata/influxdb/pull/21795): fix: show shards gives empty expiry time for inf duration shards
 
 v1.9.2 [unreleased]
 -	[#21631](https://github.com/influxdata/influxdb/pull/21631): fix: group by returns multiple results per group in some circumstances

coordinator/statement_executor.go

@@ -810,15 +810,18 @@ func (e *StatementExecutor) executeShowShardsStatement(stmt *influxql.ShowShards
 					for i, owner := range si.Owners {
 						ownerIDs[i] = owner.NodeID
 					}
-
+					expiry := ""
+					if rpi.Duration != 0 {
+						expiry = sgi.EndTime.Add(rpi.Duration).UTC().Format(time.RFC3339)
+					}
 					row.Values = append(row.Values, []interface{}{
 						si.ID,
 						di.Name,
 						rpi.Name,
 						sgi.ID,
 						sgi.StartTime.UTC().Format(time.RFC3339),
 						sgi.EndTime.UTC().Format(time.RFC3339),
-						sgi.EndTime.Add(rpi.Duration).UTC().Format(time.RFC3339),
+						expiry,
 						joinUint64(ownerIDs),
 					})
 				}

tests/server_test.go

@@ -820,6 +820,11 @@ func TestServer_Query_DefaultDBAndRP(t *testing.T) {
 			command: `show retention policies ON db0`,
 			exp:     `{"results":[{"statement_id":0,"series":[{"columns":["name","duration","shardGroupDuration","replicaN","default"],"values":[["autogen","0s","168h0m0s",1,false],["rp0","0s","168h0m0s",1,true]]}]}]}`,
 		},
+		&Query{
+			name:    "show shards works",
+			command: `show shards`,
+			exp:     `{"results":[{"statement_id":0,"series":[{"name":"db0","columns":["id","database","retention_policy","shard_group","start_time","end_time","expiry_time","owners"],"values":[[1,"db0","rp0",1,"1999-12-27T00:00:00Z","2000-01-03T00:00:00Z","",""]]}]}]}`,
+		},
 		&Query{
 			name:    "default rp",
 			command: `SELECT * FROM db0..cpu GROUP BY *`,
@@ -851,6 +856,42 @@ func TestServer_Query_DefaultDBAndRP(t *testing.T) {
 	}
 }
 
+func TestServer_ShowShardsNonInf(t *testing.T) {
+	t.Parallel()
+	s := OpenServer(NewConfig())
+	defer s.Close()
+
+	if err := s.CreateDatabaseAndRetentionPolicy("db0", NewRetentionPolicySpec("rp0", 1, 1000000*time.Hour), true); err != nil {
+		t.Fatal(err)
+	}
+
+	points := []string{
+		"cpu,host=server01 value=100 1621440001000000000",
+	}
+	if _, err := s.Write("db0", "rp0", strings.Join(points, "\n"), nil); err != nil {
+		t.Fatal("unexpected error: ", err)
+	}
+
+	if err := s.CreateDatabaseAndRetentionPolicy("db0", NewRetentionPolicySpec("rp1", 1, 0), true); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := s.Write("db0", "rp1", strings.Join(points, "\n"), nil); err != nil {
+		t.Fatal("unexpected error: ", err)
+	}
+
+	// inf shard has no expiry_time, shard with expiry has correct expiry_time
+	exp := `{"results":[{"statement_id":0,"series":[{"name":"db0","columns":` +
+		`["id","database","retention_policy","shard_group","start_time","end_time","expiry_time","owners"],"values":[` +
+		`[1,"db0","rp0",1,"2021-05-17T00:00:00Z","2021-05-24T00:00:00Z","2135-06-22T16:00:00Z",""],` +
+		`[2,"db0","rp1",2,"2021-05-17T00:00:00Z","2021-05-24T00:00:00Z","",""]]}]}]}`
+	// Verify the data was written.
+	if res, err := s.Query(`show shards`); err != nil {
+		t.Fatal(err)
+	} else if exp != res {
+		t.Fatalf("unexpected results\nexp: %s\ngot: %s\n", exp, res)
+	}
+}
+
 // Ensure the server can have a database with multiple measurements.
 func TestServer_Query_Multiple_Measurements(t *testing.T) {
 	t.Parallel()