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package schema
import ( "fmt" "github.com/parquet-go/parquet-go" "github.com/seaweedfs/seaweedfs/weed/pb/schema_pb" )
// ToRecordValue converts a parquet.Row to a schema_pb.RecordValue
// This does not work or did not test with nested structures.
// Using this may fail to convert the parquet.Row to schema_pb.RecordValue
func ToRecordValue(recordType *schema_pb.RecordType, parquetLevels *ParquetLevels, row parquet.Row) (*schema_pb.RecordValue, error) { values := []parquet.Value(row) recordValue, _, err := toRecordValue(recordType, parquetLevels, values, 0) if err != nil { return nil, err } return recordValue.GetRecordValue(), nil }
func ToValue(t *schema_pb.Type, levels *ParquetLevels, values []parquet.Value, valueIndex int) (value *schema_pb.Value, endValueIndex int, err error) { switch t.Kind.(type) { case *schema_pb.Type_ScalarType: return toScalarValue(t.GetScalarType(), levels, values, valueIndex) case *schema_pb.Type_ListType: return toListValue(t.GetListType(), levels, values, valueIndex) case *schema_pb.Type_RecordType: return toRecordValue(t.GetRecordType(), levels, values, valueIndex) } return nil, valueIndex, fmt.Errorf("unsupported type: %v", t) }
func toRecordValue(recordType *schema_pb.RecordType, levels *ParquetLevels, values []parquet.Value, valueIndex int) (*schema_pb.Value, int, error) { recordValue := schema_pb.RecordValue{Fields: make(map[string]*schema_pb.Value)} for _, field := range recordType.Fields { fieldLevels := levels.levels[field.Name] fieldValue, endValueIndex, err := ToValue(field.Type, fieldLevels, values, valueIndex) if err != nil { return nil, 0, err } valueIndex = endValueIndex recordValue.Fields[field.Name] = fieldValue } return &schema_pb.Value{Kind: &schema_pb.Value_RecordValue{RecordValue: &recordValue}}, valueIndex, nil }
func toListValue(listType *schema_pb.ListType, levels *ParquetLevels, values []parquet.Value, valueIndex int) (listValue *schema_pb.Value, endValueIndex int, err error) { listValues := make([]*schema_pb.Value, 0) var value *schema_pb.Value for ;valueIndex < len(values); { if values[valueIndex].Column() != levels.startColumnIndex { break } value, valueIndex, err = ToValue(listType.ElementType, levels, values, valueIndex) if err != nil { return nil, valueIndex, err } listValues = append(listValues, value) } return &schema_pb.Value{Kind: &schema_pb.Value_ListValue{ListValue: &schema_pb.ListValue{Values: listValues}}}, valueIndex, nil }
func toScalarValue(scalarType schema_pb.ScalarType, levels *ParquetLevels, values []parquet.Value, valueIndex int) (*schema_pb.Value, int, error) { value := values[valueIndex] if value.Column() != levels.startColumnIndex { return nil, valueIndex, nil } switch scalarType { case schema_pb.ScalarType_BOOLEAN: return &schema_pb.Value{Kind: &schema_pb.Value_BoolValue{BoolValue: value.Boolean()}}, valueIndex+1, nil case schema_pb.ScalarType_INTEGER: return &schema_pb.Value{Kind: &schema_pb.Value_Int32Value{Int32Value: value.Int32()}}, valueIndex+1, nil case schema_pb.ScalarType_LONG: return &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: value.Int64()}}, valueIndex+1, nil case schema_pb.ScalarType_FLOAT: return &schema_pb.Value{Kind: &schema_pb.Value_FloatValue{FloatValue: value.Float()}}, valueIndex+1, nil case schema_pb.ScalarType_DOUBLE: return &schema_pb.Value{Kind: &schema_pb.Value_DoubleValue{DoubleValue: value.Double()}}, valueIndex+1, nil case schema_pb.ScalarType_BYTES: return &schema_pb.Value{Kind: &schema_pb.Value_BytesValue{BytesValue: value.ByteArray()}}, valueIndex+1, nil case schema_pb.ScalarType_STRING: return &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: string(value.ByteArray())}}, valueIndex+1, nil } return nil, valueIndex, fmt.Errorf("unsupported scalar type: %v", scalarType) }
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