convert to parquet schema and value

7 files changed, 358 insertions, 84 deletions

diff --git a/go.mod b/go.mod
index c965346e9..a29066719 100644
--- a/go.mod
+++ b/go.mod
@@ -151,6 +151,7 @@ require (
 	github.com/hashicorp/raft v1.6.1
 	github.com/hashicorp/raft-boltdb/v2 v2.3.0
 	github.com/orcaman/concurrent-map/v2 v2.0.1
+	github.com/parquet-go/parquet-go v0.20.1
 	github.com/rabbitmq/amqp091-go v1.9.0
 	github.com/rclone/rclone v1.66.0
 	github.com/rdleal/intervalst v1.3.0
@@ -187,6 +188,7 @@ require (
 	github.com/PuerkitoBio/goquery v1.8.1 // indirect
 	github.com/Unknwon/goconfig v1.0.0 // indirect
 	github.com/abbot/go-http-auth v0.4.0 // indirect
+	github.com/andybalholm/brotli v1.0.5 // indirect
 	github.com/andybalholm/cascadia v1.3.2 // indirect
 	github.com/arangodb/go-velocypack v0.0.0-20200318135517-5af53c29c67e // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.1 // indirect
@@ -270,6 +272,7 @@ require (
 	github.com/nats-io/nkeys v0.4.7 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/ncw/swift/v2 v2.0.2 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
 	github.com/onsi/gomega v1.27.10 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/oracle/oci-go-sdk/v65 v65.55.1 // indirect
@@ -277,7 +280,7 @@ require (
 	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
 	github.com/pengsrc/go-shared v0.2.1-0.20190131101655-1999055a4a14 // indirect
 	github.com/philhofer/fwd v1.1.2 // indirect
-	github.com/pierrec/lz4/v4 v4.1.17 // indirect
+	github.com/pierrec/lz4/v4 v4.1.18 // indirect
 	github.com/pingcap/errors v0.11.5-0.20211224045212-9687c2b0f87c // indirect
 	github.com/pingcap/failpoint v0.0.0-20220801062533-2eaa32854a6c // indirect
 	github.com/pingcap/kvproto v0.0.0-20230403051650-e166ae588106 // indirect
@@ -292,6 +295,7 @@ require (
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/sagikazarmark/locafero v0.4.0 // indirect
 	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/segmentio/encoding v0.3.6 // indirect
 	github.com/shoenig/go-m1cpu v0.1.6 // indirect
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 // indirect
 	github.com/smartystreets/goconvey v1.8.1 // indirect
diff --git a/go.sum b/go.sum
index 9cce26431..9ef8291cf 100644
--- a/go.sum
+++ b/go.sum
@@ -124,6 +124,8 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuy
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/cCs=
+github.com/andybalholm/brotli v1.0.5/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/andybalholm/cascadia v1.3.1/go.mod h1:R4bJ1UQfqADjvDa4P6HZHLh/3OxWWEqc0Sk8XGwHqvA=
 github.com/andybalholm/cascadia v1.3.2 h1:3Xi6Dw5lHF15JtdcmAHD3i1+T8plmv7BQ/nsViSLyss=
 github.com/andybalholm/cascadia v1.3.2/go.mod h1:7gtRlve5FxPPgIgX36uWBX58OdBsSS6lUvCFb+h7KvU=
@@ -545,6 +547,8 @@ github.com/henrybear327/Proton-API-Bridge v1.0.0 h1:gjKAaWfKu++77WsZTHg6FUyPC5W0
 github.com/henrybear327/Proton-API-Bridge v1.0.0/go.mod h1:gunH16hf6U74W2b9CGDaWRadiLICsoJ6KRkSt53zLts=
 github.com/henrybear327/go-proton-api v1.0.0 h1:zYi/IbjLwFAW7ltCeqXneUGJey0TN//Xo851a/BgLXw=
 github.com/henrybear327/go-proton-api v1.0.0/go.mod h1:w63MZuzufKcIZ93pwRgiOtxMXYafI8H74D77AxytOBc=
+github.com/hexops/gotextdiff v1.0.3 h1:gitA9+qJrrTCsiCl7+kh75nPqQt1cx4ZkudSTLoUqJM=
+github.com/hexops/gotextdiff v1.0.3/go.mod h1:pSWU5MAI3yDq+fZBTazCSJysOMbxWL1BSow5/V2vxeg=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/jcmturner/aescts/v2 v2.0.0 h1:9YKLH6ey7H4eDBXW8khjYslgyqG2xZikXP0EQFKrle8=
@@ -653,6 +657,7 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-runewidth v0.0.3/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
+github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mattn/go-sqlite3 v2.0.1+incompatible h1:xQ15muvnzGBHpIpdrNi1DA5x0+TcBZzsIDwmw9uTHzw=
@@ -693,6 +698,8 @@ github.com/ncw/swift/v2 v2.0.2 h1:jx282pcAKFhmoZBSdMcCRFn9VWkoBIRsCpe+yZq7vEk=
 github.com/ncw/swift/v2 v2.0.2/go.mod h1:z0A9RVdYPjNjXVo2pDOPxZ4eu3oarO1P91fTItcb+Kg=
 github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
 github.com/nxadm/tail v1.4.8/go.mod h1:+ncqLTQzXmGhMZNUePPaPqPvBxHAIsmXswZKocGu+AU=
+github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
+github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
 github.com/olivere/elastic/v7 v7.0.32 h1:R7CXvbu8Eq+WlsLgxmKVKPox0oOwAE/2T9Si5BnvK6E=
 github.com/olivere/elastic/v7 v7.0.32/go.mod h1:c7PVmLe3Fxq77PIfY/bZmxY/TAamBhCzZ8xDOE09a9k=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
@@ -711,6 +718,8 @@ github.com/oracle/oci-go-sdk/v65 v65.55.1 h1:82j4YHtqeJJiOPyLKxP4/x3Oi8tv2o1etKM
 github.com/oracle/oci-go-sdk/v65 v65.55.1/go.mod h1:IBEV9l1qBzUpo7zgGaRUhbB05BVfcDGYRFBCPlTcPp0=
 github.com/orcaman/concurrent-map/v2 v2.0.1 h1:jOJ5Pg2w1oeB6PeDurIYf6k9PQ+aTITr/6lP/L/zp6c=
 github.com/orcaman/concurrent-map/v2 v2.0.1/go.mod h1:9Eq3TG2oBe5FirmYWQfYO5iH1q0Jv47PLaNK++uCdOM=
+github.com/parquet-go/parquet-go v0.20.1 h1:r5UqeMqyH2DrahZv6dlT41hH2NpS2F8atJWmX1ST1/U=
+github.com/parquet-go/parquet-go v0.20.1/go.mod h1:4YfUo8TkoGoqwzhA/joZKZ8f77wSMShOLHESY4Ys0bY=
 github.com/pascaldekloe/goe v0.1.0 h1:cBOtyMzM9HTpWjXfbbunk26uA6nG3a8n06Wieeh0MwY=
 github.com/pascaldekloe/goe v0.1.0/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=
@@ -723,8 +732,8 @@ github.com/peterh/liner v1.2.2 h1:aJ4AOodmL+JxOZZEL2u9iJf8omNRpqHc/EbrK+3mAXw=
 github.com/peterh/liner v1.2.2/go.mod h1:xFwJyiKIXJZUKItq5dGHZSTBRAuG/CpeNpWLyiNRNwI=
 github.com/philhofer/fwd v1.1.2 h1:bnDivRJ1EWPjUIRXV5KfORO897HTbpFAQddBdE8t7Gw=
 github.com/philhofer/fwd v1.1.2/go.mod h1:qkPdfjR2SIEbspLqpe1tO4n5yICnr2DY7mqEx2tUTP0=
-github.com/pierrec/lz4/v4 v4.1.17 h1:kV4Ip+/hUBC+8T6+2EgburRtkE9ef4nbY3f4dFhGjMc=
-github.com/pierrec/lz4/v4 v4.1.17/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
+github.com/pierrec/lz4/v4 v4.1.18 h1:xaKrnTkyoqfh1YItXl56+6KJNVYWlEEPuAQW9xsplYQ=
+github.com/pierrec/lz4/v4 v4.1.18/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
 github.com/pingcap/errors v0.11.0/go.mod h1:Oi8TUi2kEtXXLMJk9l1cGmz20kV3TaQ0usTwv5KuLY8=
 github.com/pingcap/errors v0.11.4/go.mod h1:Oi8TUi2kEtXXLMJk9l1cGmz20kV3TaQ0usTwv5KuLY8=
 github.com/pingcap/errors v0.11.5-0.20211224045212-9687c2b0f87c h1:xpW9bvK+HuuTmyFqUwr+jcCvpVkK7sumiz+ko5H9eq4=
@@ -827,6 +836,9 @@ github.com/seaweedfs/raft v1.1.3 h1:5B6hgneQ7IuU4Ceom/f6QUt8pEeqjcsRo+IxlyPZCws=
 github.com/seaweedfs/raft v1.1.3/go.mod h1:9cYlEBA+djJbnf/5tWsCybtbL7ICYpi+Uxcg3MxjuNs=
 github.com/secsy/goftp v0.0.0-20200609142545-aa2de14babf4 h1:PT+ElG/UUFMfqy5HrxJxNzj3QBOf7dZwupeVC+mG1Lo=
 github.com/secsy/goftp v0.0.0-20200609142545-aa2de14babf4/go.mod h1:MnkX001NG75g3p8bhFycnyIjeQoOjGL6CEIsdE/nKSY=
+github.com/segmentio/asm v1.1.3/go.mod h1:Ld3L4ZXGNcSLRg4JBsZ3//1+f/TjYl0Mzen/DQy1EJg=
+github.com/segmentio/encoding v0.3.6 h1:E6lVLyDPseWEulBmCmAKPanDd3jiyGDo5gMcugCRwZQ=
+github.com/segmentio/encoding v0.3.6/go.mod h1:n0JeuIqEQrQoPDGsjo8UNd1iA0U8d8+oHAA4E3G3OxM=
 github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
 github.com/shirou/gopsutil/v3 v3.24.3 h1:eoUGJSmdfLzJ3mxIhmOAhgKEKgQkeOwKpz1NbhVnuPE=
 github.com/shirou/gopsutil/v3 v3.24.3/go.mod h1:JpND7O217xa72ewWz9zN2eIIkPWsDN/3pl0H8Qt0uwg=
@@ -1229,6 +1241,7 @@ golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20210906170528-6f6e22806c34/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211110154304-99a53858aa08/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211117180635-dee7805ff2e1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220408201424-a24fb2fb8a0f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220503163025-988cb79eb6c6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
diff --git a/weed/mq/schema/schema.go b/weed/mq/schema/schema.go
index 5cb7a8df1..72064f5d7 100644
--- a/weed/mq/schema/schema.go
+++ b/weed/mq/schema/schema.go
@@ -1,32 +1,26 @@
 package schema
 
 import (
-	"fmt"
 	"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
 )
 
 type Schema struct {
 	RecordType *schema_pb.RecordType
-	indexedFields []*schema_pb.Field
+	fieldMap map[string]*schema_pb.Field
 }
 
 func NewSchema(recordType *schema_pb.RecordType) (*Schema, error) {
-	var indexedFields []*schema_pb.Field
-	var largestIndex int32
+	var fieldMap map[string]*schema_pb.Field
 	for _, field := range recordType.Fields {
-		if field.Index > largestIndex {
-			largestIndex = field.Index
-		}
-		if field.Index < 0 {
-			return nil, fmt.Errorf("field %s index %d is negative", field.Name, field.Index)
-		}
-	}
-	indexedFields = make([]*schema_pb.Field, largestIndex+1)
-	for _, field := range recordType.Fields {
-		indexedFields[field.Index] = field
+		fieldMap[field.Name] = field
 	}
 	return &Schema{
 		RecordType: recordType,
-		indexedFields: indexedFields,
+		fieldMap: fieldMap,
 	}, nil
 }
+
+func (s *Schema) GetField(name string) (*schema_pb.Field, bool) {
+	field, ok := s.fieldMap[name]
+	return field, ok
+}
diff --git a/weed/mq/schema/to_parquet_schema.go b/weed/mq/schema/to_parquet_schema.go
new file mode 100644
index 000000000..f39692714
--- /dev/null
+++ b/weed/mq/schema/to_parquet_schema.go
@@ -0,0 +1,65 @@
+package schema
+
+import (
+	"fmt"
+	parquet "github.com/parquet-go/parquet-go"
+	"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
+)
+
+func ToParquetSchema(topicName string, recordType *schema_pb.RecordType) (*parquet.Schema, error) {
+	rootNode, err := toParquetFieldTypeRecord(recordType)
+	if err != nil {
+		return nil, fmt.Errorf("failed to convert record type to parquet schema: %v", err)
+	}
+
+	return parquet.NewSchema(topicName, rootNode), nil
+}
+
+func toParquetFieldType(field *schema_pb.Field) (parquet.Node, error) {
+	var (
+		dataType parquet.Node
+		err      error
+	)
+	switch field.Type.Kind.(type) {
+	case *schema_pb.Type_ScalarType:
+		dataType, err = toParquetFieldTypeScalar(field.Type.GetScalarType())
+	case *schema_pb.Type_RecordType:
+		dataType, err = toParquetFieldTypeRecord(field.Type.GetRecordType())
+	default:
+		return nil, fmt.Errorf("unknown field type: %T", field.Type.Kind)
+	}
+
+	return dataType, err
+}
+
+func toParquetFieldTypeScalar(scalarType schema_pb.ScalarType) (parquet.Node, error) {
+	switch scalarType {
+	case schema_pb.ScalarType_BOOLEAN:
+		return parquet.Leaf(parquet.BooleanType), nil
+	case schema_pb.ScalarType_INTEGER:
+		return parquet.Leaf(parquet.Int32Type), nil
+	case schema_pb.ScalarType_LONG:
+		return parquet.Leaf(parquet.Int64Type), nil
+	case schema_pb.ScalarType_FLOAT:
+		return parquet.Leaf(parquet.FloatType), nil
+	case schema_pb.ScalarType_DOUBLE:
+		return parquet.Leaf(parquet.DoubleType), nil
+	case schema_pb.ScalarType_BYTES:
+		return parquet.Leaf(parquet.ByteArrayType), nil
+	case schema_pb.ScalarType_STRING:
+		return parquet.String(), nil
+	default:
+		return nil, fmt.Errorf("unknown scalar type: %v", scalarType)
+	}
+}
+func toParquetFieldTypeRecord(recordType *schema_pb.RecordType) (parquet.Node, error) {
+	recordNode := parquet.Group{}
+	for _, field := range recordType.Fields {
+		parquetFieldType, err := toParquetFieldType(field)
+		if err != nil {
+			return nil, err
+		}
+		recordNode[field.Name] = parquetFieldType
+	}
+	return recordNode, nil
+}
diff --git a/weed/mq/schema/to_parquet_value.go b/weed/mq/schema/to_parquet_value.go
new file mode 100644
index 000000000..8041da3ad
--- /dev/null
+++ b/weed/mq/schema/to_parquet_value.go
@@ -0,0 +1,86 @@
+package schema
+
+import (
+	"fmt"
+	parquet "github.com/parquet-go/parquet-go"
+	"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
+)
+
+
+func AddRecordValue(rowBuilder *parquet.RowBuilder, fieldType *schema_pb.Type, fieldValue *schema_pb.Value) error {
+	visitor := func(fieldType *schema_pb.Type, fieldValue *schema_pb.Value, index int) error {
+		switch fieldType.Kind.(type) {
+		case *schema_pb.Type_ScalarType:
+			parquetValue, err := toParquetValue(fieldValue)
+			if err != nil {
+				return err
+			}
+			rowBuilder.Add(index, parquetValue)
+		}
+		return nil
+	}
+	return visitValue(fieldType, fieldValue, visitor)
+}
+
+// typeValueVisitor is a function that is called for each value in a schema_pb.Value
+// Find the column index.
+// intended to be used in RowBuilder.Add(columnIndex, value)
+type typeValueVisitor func(fieldType *schema_pb.Type, fieldValue *schema_pb.Value, index int) error
+
+func visitValue(fieldType *schema_pb.Type, fieldValue *schema_pb.Value, visitor typeValueVisitor) (err error) {
+	_, err = doVisitValue(fieldType, fieldValue, 0, visitor)
+	return
+}
+
+// endIndex is exclusive
+// same logic as RowBuilder.configure in row_builder.go
+func doVisitValue(fieldType *schema_pb.Type, fieldValue *schema_pb.Value, columnIndex int, visitor typeValueVisitor) (endIndex int, err error) {
+	switch fieldType.Kind.(type) {
+	case *schema_pb.Type_ScalarType:
+		return columnIndex+1, visitor(fieldType, fieldValue, columnIndex)
+	case *schema_pb.Type_ListType:
+		for _, value := range fieldValue.GetListValue().Values {
+			err = visitor(fieldType, value, columnIndex)
+			if err != nil {
+				return
+			}
+		}
+		return columnIndex+1, nil
+	case *schema_pb.Type_RecordType:
+		for _, field := range fieldType.GetRecordType().Fields {
+			fieldValue, found := fieldValue.GetRecordValue().Fields[field.Name]
+			if !found {
+				// TODO check this if no such field found
+				return columnIndex, nil
+			}
+			endIndex, err = doVisitValue(field.Type, fieldValue, columnIndex, visitor)
+			if err != nil {
+				return
+			}
+			columnIndex = endIndex
+		}
+		return
+	}
+	return
+}
+
+func toParquetValue(value *schema_pb.Value) (parquet.Value,  error) {
+	switch value.Kind.(type) {
+	case *schema_pb.Value_BoolValue:
+		return parquet.BooleanValue(value.GetBoolValue()), nil
+	case *schema_pb.Value_Int32Value:
+		return parquet.Int32Value(value.GetInt32Value()), nil
+	case *schema_pb.Value_Int64Value:
+		return parquet.Int64Value(value.GetInt64Value()), nil
+	case *schema_pb.Value_FloatValue:
+		return parquet.FloatValue(value.GetFloatValue()), nil
+	case *schema_pb.Value_DoubleValue:
+		return parquet.DoubleValue(value.GetDoubleValue()), nil
+	case *schema_pb.Value_BytesValue:
+		return parquet.ByteArrayValue(value.GetBytesValue()), nil
+	case *schema_pb.Value_StringValue:
+		return parquet.ByteArrayValue([]byte(value.GetStringValue())), nil
+	default:
+		return parquet.NullValue(), fmt.Errorf("unknown value type: %T", value.Kind)
+	}
+}
diff --git a/weed/pb/schema.proto b/weed/pb/schema.proto
index 074db9135..b45a390d3 100644
--- a/weed/pb/schema.proto
+++ b/weed/pb/schema.proto
@@ -23,6 +23,7 @@ message Type {
     oneof kind {
         ScalarType scalar_type = 1;
         RecordType record_type = 2;
+        ListType list_type = 3;
     }
 }
 
@@ -36,6 +37,10 @@ enum ScalarType {
     STRING = 7;
 }
 
+message ListType {
+    Type element_type = 1;
+}
+
 ///////////////////////////
 // value definition
 ///////////////////////////
@@ -51,6 +56,10 @@ message Value {
         double double_value = 5;
         bytes bytes_value = 6;
         string string_value = 7;
+        ListValue list_value = 14;
         RecordValue record_value = 15;
     }
 }
+message ListValue {
+    repeated Value values = 1;
+}
diff --git a/weed/pb/schema_pb/schema.pb.go b/weed/pb/schema_pb/schema.pb.go
index 661d96be5..e50ae93ad 100644
--- a/weed/pb/schema_pb/schema.pb.go
+++ b/weed/pb/schema_pb/schema.pb.go
@@ -208,6 +208,7 @@ type Type struct {
 	//
 	//	*Type_ScalarType
 	//	*Type_RecordType
+	//	*Type_ListType
 	Kind isType_Kind `protobuf_oneof:"kind"`
 }
 
@@ -264,6 +265,13 @@ func (x *Type) GetRecordType() *RecordType {
 	return nil
 }
 
+func (x *Type) GetListType() *ListType {
+	if x, ok := x.GetKind().(*Type_ListType); ok {
+		return x.ListType
+	}
+	return nil
+}
+
 type isType_Kind interface {
 	isType_Kind()
 }
@@ -273,24 +281,29 @@ type Type_ScalarType struct {
 }
 
 type Type_RecordType struct {
-	RecordType *RecordType `protobuf:"bytes,2,opt,name=record_type,json=recordType,proto3,oneof"` // MapType map_type = 3;
+	RecordType *RecordType `protobuf:"bytes,2,opt,name=record_type,json=recordType,proto3,oneof"`
+}
+
+type Type_ListType struct {
+	ListType *ListType `protobuf:"bytes,3,opt,name=list_type,json=listType,proto3,oneof"`
 }
 
 func (*Type_ScalarType) isType_Kind() {}
 
 func (*Type_RecordType) isType_Kind() {}
 
-type MapType struct {
+func (*Type_ListType) isType_Kind() {}
+
+type ListType struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// key is always string
-	Value *Type `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
+	ElementType *Type `protobuf:"bytes,1,opt,name=element_type,json=elementType,proto3" json:"element_type,omitempty"`
 }
 
-func (x *MapType) Reset() {
-	*x = MapType{}
+func (x *ListType) Reset() {
+	*x = ListType{}
 	if protoimpl.UnsafeEnabled {
 		mi := &file_schema_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -298,13 +311,13 @@ func (x *MapType) Reset() {
 	}
 }
 
-func (x *MapType) String() string {
+func (x *ListType) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*MapType) ProtoMessage() {}
+func (*ListType) ProtoMessage() {}
 
-func (x *MapType) ProtoReflect() protoreflect.Message {
+func (x *ListType) ProtoReflect() protoreflect.Message {
 	mi := &file_schema_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -316,14 +329,14 @@ func (x *MapType) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use MapType.ProtoReflect.Descriptor instead.
-func (*MapType) Descriptor() ([]byte, []int) {
+// Deprecated: Use ListType.ProtoReflect.Descriptor instead.
+func (*ListType) Descriptor() ([]byte, []int) {
 	return file_schema_proto_rawDescGZIP(), []int{3}
 }
 
-func (x *MapType) GetValue() *Type {
+func (x *ListType) GetElementType() *Type {
 	if x != nil {
-		return x.Value
+		return x.ElementType
 	}
 	return nil
 }
@@ -392,6 +405,7 @@ type Value struct {
 	//	*Value_DoubleValue
 	//	*Value_BytesValue
 	//	*Value_StringValue
+	//	*Value_ListValue
 	//	*Value_RecordValue
 	Kind isValue_Kind `protobuf_oneof:"kind"`
 }
@@ -484,6 +498,13 @@ func (x *Value) GetStringValue() string {
 	return ""
 }
 
+func (x *Value) GetListValue() *ListValue {
+	if x, ok := x.GetKind().(*Value_ListValue); ok {
+		return x.ListValue
+	}
+	return nil
+}
+
 func (x *Value) GetRecordValue() *RecordValue {
 	if x, ok := x.GetKind().(*Value_RecordValue); ok {
 		return x.RecordValue
@@ -523,6 +544,10 @@ type Value_StringValue struct {
 	StringValue string `protobuf:"bytes,7,opt,name=string_value,json=stringValue,proto3,oneof"`
 }
 
+type Value_ListValue struct {
+	ListValue *ListValue `protobuf:"bytes,14,opt,name=list_value,json=listValue,proto3,oneof"`
+}
+
 type Value_RecordValue struct {
 	RecordValue *RecordValue `protobuf:"bytes,15,opt,name=record_value,json=recordValue,proto3,oneof"`
 }
@@ -541,8 +566,57 @@ func (*Value_BytesValue) isValue_Kind() {}
 
 func (*Value_StringValue) isValue_Kind() {}
 
+func (*Value_ListValue) isValue_Kind() {}
+
 func (*Value_RecordValue) isValue_Kind() {}
 
+type ListValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Values []*Value `protobuf:"bytes,1,rep,name=values,proto3" json:"values,omitempty"`
+}
+
+func (x *ListValue) Reset() {
+	*x = ListValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_schema_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListValue) ProtoMessage() {}
+
+func (x *ListValue) ProtoReflect() protoreflect.Message {
+	mi := &file_schema_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListValue.ProtoReflect.Descriptor instead.
+func (*ListValue) Descriptor() ([]byte, []int) {
+	return file_schema_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *ListValue) GetValues() []*Value {
+	if x != nil {
+		return x.Values
+	}
+	return nil
+}
+
 var File_schema_proto protoreflect.FileDescriptor
 
 var file_schema_proto_rawDesc = []byte{
@@ -558,7 +632,7 @@ var file_schema_proto_rawDesc = []byte{
 	0x79, 0x70, 0x65, 0x12, 0x14, 0x0a, 0x05, 0x69, 0x6e, 0x64, 0x65, 0x78, 0x18, 0x03, 0x20, 0x01,
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+	0x69, 0x73, 0x52, 0x65, 0x70, 0x65, 0x61, 0x74, 0x65, 0x64, 0x22, 0xb6, 0x01, 0x0a, 0x04, 0x54,
 	0x79, 0x70, 0x65, 0x12, 0x38, 0x0a, 0x0b, 0x73, 0x63, 0x61, 0x6c, 0x61, 0x72, 0x5f, 0x74, 0x79,
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 	0x61, 0x5f, 0x70, 0x62, 0x2e, 0x53, 0x63, 0x61, 0x6c, 0x61, 0x72, 0x54, 0x79, 0x70, 0x65, 0x48,
@@ -566,40 +640,51 @@ var file_schema_proto_rawDesc = []byte{
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@@ -625,31 +710,35 @@ func file_schema_proto_rawDescGZIP() []byte {
 }
 
 var file_schema_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_schema_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
+var file_schema_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
 var file_schema_proto_goTypes = []interface{}{
 	(ScalarType)(0),     // 0: schema_pb.ScalarType
 	(*RecordType)(nil),  // 1: schema_pb.RecordType
 	(*Field)(nil),       // 2: schema_pb.Field
 	(*Type)(nil),        // 3: schema_pb.Type
-	(*MapType)(nil),     // 4: schema_pb.MapType
+	(*ListType)(nil),    // 4: schema_pb.ListType
 	(*RecordValue)(nil), // 5: schema_pb.RecordValue
 	(*Value)(nil),       // 6: schema_pb.Value
-	nil,                 // 7: schema_pb.RecordValue.FieldsEntry
+	(*ListValue)(nil),   // 7: schema_pb.ListValue
+	nil,                 // 8: schema_pb.RecordValue.FieldsEntry
 }
 var file_schema_proto_depIdxs = []int32{
-	2, // 0: schema_pb.RecordType.fields:type_name -> schema_pb.Field
-	3, // 1: schema_pb.Field.type:type_name -> schema_pb.Type
-	0, // 2: schema_pb.Type.scalar_type:type_name -> schema_pb.ScalarType
-	1, // 3: schema_pb.Type.record_type:type_name -> schema_pb.RecordType
-	3, // 4: schema_pb.MapType.value:type_name -> schema_pb.Type
-	7, // 5: schema_pb.RecordValue.fields:type_name -> schema_pb.RecordValue.FieldsEntry
-	5, // 6: schema_pb.Value.record_value:type_name -> schema_pb.RecordValue
-	6, // 7: schema_pb.RecordValue.FieldsEntry.value:type_name -> schema_pb.Value
-	8, // [8:8] is the sub-list for method output_type
-	8, // [8:8] is the sub-list for method input_type
-	8, // [8:8] is the sub-list for extension type_name
-	8, // [8:8] is the sub-list for extension extendee
-	0, // [0:8] is the sub-list for field type_name
+	2,  // 0: schema_pb.RecordType.fields:type_name -> schema_pb.Field
+	3,  // 1: schema_pb.Field.type:type_name -> schema_pb.Type
+	0,  // 2: schema_pb.Type.scalar_type:type_name -> schema_pb.ScalarType
+	1,  // 3: schema_pb.Type.record_type:type_name -> schema_pb.RecordType
+	4,  // 4: schema_pb.Type.list_type:type_name -> schema_pb.ListType
+	3,  // 5: schema_pb.ListType.element_type:type_name -> schema_pb.Type
+	8,  // 6: schema_pb.RecordValue.fields:type_name -> schema_pb.RecordValue.FieldsEntry
+	7,  // 7: schema_pb.Value.list_value:type_name -> schema_pb.ListValue
+	5,  // 8: schema_pb.Value.record_value:type_name -> schema_pb.RecordValue
+	6,  // 9: schema_pb.ListValue.values:type_name -> schema_pb.Value
+	6,  // 10: schema_pb.RecordValue.FieldsEntry.value:type_name -> schema_pb.Value
+	11, // [11:11] is the sub-list for method output_type
+	11, // [11:11] is the sub-list for method input_type
+	11, // [11:11] is the sub-list for extension type_name
+	11, // [11:11] is the sub-list for extension extendee
+	0,  // [0:11] is the sub-list for field type_name
 }
 
 func init() { file_schema_proto_init() }
@@ -695,7 +784,7 @@ func file_schema_proto_init() {
 			}
 		}
 		file_schema_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MapType); i {
+			switch v := v.(*ListType); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -730,10 +819,23 @@ func file_schema_proto_init() {
 				return nil
 			}
 		}
+		file_schema_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	file_schema_proto_msgTypes[2].OneofWrappers = []interface{}{
 		(*Type_ScalarType)(nil),
 		(*Type_RecordType)(nil),
+		(*Type_ListType)(nil),
 	}
 	file_schema_proto_msgTypes[5].OneofWrappers = []interface{}{
 		(*Value_BoolValue)(nil),
@@ -743,6 +845,7 @@ func file_schema_proto_init() {
 		(*Value_DoubleValue)(nil),
 		(*Value_BytesValue)(nil),
 		(*Value_StringValue)(nil),
+		(*Value_ListValue)(nil),
 		(*Value_RecordValue)(nil),
 	}
 	type x struct{}
@@ -751,7 +854,7 @@ func file_schema_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_schema_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   7,
+			NumMessages:   8,
 			NumExtensions: 0,
 			NumServices:   0,
 		},