feat: Support INTERVAL type (#219)

* Bump cloud.google.com/go/spanner to v1.80.0

* Support INTERVAL type

* Fix typo

Author: apstndb

decoder.go

@@ -175,6 +175,17 @@ func DecodeColumn(column spanner.GenericColumnValue) (string, error) {
 			for _, v := range vs {
 				decoded = append(decoded, nullJSONToString(v))
 			}
+		case sppb.TypeCode_INTERVAL:
+			var vs []spanner.NullInterval
+			if err := column.Decode(&vs); err != nil {
+				return "", err
+			}
+			if vs == nil {
+				return "NULL", nil
+			}
+			for _, v := range vs {
+				decoded = append(decoded, nullIntervalToString(v))
+			}
 		case sppb.TypeCode_UUID:
 			var vs []spanner.NullUUID
 			if err := column.Decode(&vs); err != nil {
@@ -248,6 +259,12 @@ func DecodeColumn(column spanner.GenericColumnValue) (string, error) {
 			return "", err
 		}
 		return nullJSONToString(v), nil
+	case sppb.TypeCode_INTERVAL:
+		var v spanner.NullInterval
+		if err := column.Decode(&v); err != nil {
+			return "", err
+		}
+		return nullIntervalToString(v), nil
 	case sppb.TypeCode_UUID:
 		var v spanner.NullUUID
 		if err := column.Decode(&v); err != nil {
@@ -341,6 +358,14 @@ func nullJSONToString(v spanner.NullJSON) string {
 	}
 }
 
+func nullIntervalToString(v spanner.NullInterval) string {
+	if v.Valid {
+		return v.String()
+	} else {
+		return "NULL"
+	}
+}
+
 func nullUUIDToString(v spanner.NullUUID) string {
 	if v.Valid {
 		return v.String()

decoder_test.go

@@ -139,6 +139,14 @@ func TestDecodeColumn(t *testing.T) {
 			value: spanner.NullJSON{Value: nil, Valid: true},
 			want:  `null`,
 		},
+		{
+			desc: "interval",
+			value: spanner.NullInterval{
+				Interval: spanner.Interval{Months: 1, Days: 1, Nanos: big.NewInt(3_600_000_000_000)},
+				Valid:    true,
+			},
+			want: `P1M1DT1H`,
+		},
 		{
 			desc:  "uuid",
 			value: spanner.NullUUID{UUID: uuid.MustParse("1778a92d-dcdb-4e7c-a515-b6f953b59e54"), Valid: true},
@@ -196,6 +204,11 @@ func TestDecodeColumn(t *testing.T) {
 			value: spanner.NullJSON{Value: nil, Valid: false},
 			want:  "NULL",
 		},
+		{
+			desc:  "null interval",
+			value: spanner.NullInterval{Interval: spanner.Interval{}, Valid: false},
+			want:  "NULL",
+		},
 		{
 			desc:  "null uuid",
 			value: spanner.NullUUID{UUID: uuid.UUID{}, Valid: false},
@@ -278,6 +291,14 @@ func TestDecodeColumn(t *testing.T) {
 			},
 			want: `[{"msg":"foo"}, {"msg":"bar"}]`,
 		},
+		{
+			desc: "array interval",
+			value: []spanner.NullInterval{
+				{Interval: spanner.Interval{Months: 1, Days: 1, Nanos: big.NewInt(3_600_000_000_000)}, Valid: true},
+				{Interval: spanner.Interval{}, Valid: true},
+			},
+			want: `[P1M1DT1H, P0Y]`,
+		},
 		{
 			desc: "array uuid",
 			value: []spanner.NullUUID{
@@ -338,6 +359,11 @@ func TestDecodeColumn(t *testing.T) {
 			value: []spanner.NullJSON(nil),
 			want:  "NULL",
 		},
+		{
+			desc:  "null array interval",
+			value: []spanner.NullInterval(nil),
+			want:  "NULL",
+		},
 		{
 			desc:  "null array uuid",
 			value: []spanner.NullUUID(nil),

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/apstndb/gsqlsep v0.0.0-20240823174243-432be37d515a
 	github.com/chzyer/readline v1.5.1
 	github.com/google/go-cmp v0.7.0
+	github.com/google/uuid v1.6.0
 	github.com/jessevdk/go-flags v1.6.1
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/xlab/treeprint v1.2.0
@@ -37,7 +38,6 @@ require (
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/google/s2a-go v0.1.9 // indirect
-	github.com/google/uuid v1.6.0 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.6 // indirect
 	github.com/googleapis/gax-go/v2 v2.14.1 // indirect
 	github.com/mattn/go-runewidth v0.0.9 // indirect