convert to parquet schema and value

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
+}