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use parquet levels to construct row

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This commit is contained in:
chrislu
2024-04-25 21:29:45 -07:00
parent 977e7988e6
commit 2a9b0a9332
1 changed files with 31 additions and 28 deletions
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59
weed/mq/schema/to_schema_value.go
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@@ -10,77 +10,80 @@ import (
// 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, row parquet.Row) (*schema_pb.RecordValue, error) {
parquetLevels, err := ToParquetLevels(recordType)
if err != nil {
return nil, err
}
values := []parquet.Value(row)
recordValue, _, _, err := toRecordValue(recordType, values, 0, 0)
recordValue, _, err := toRecordValue(recordType, parquetLevels, values, 0)
if err != nil {
return nil, err
}
return recordValue.GetRecordValue(), nil
}
func ToValue(t *schema_pb.Type, values []parquet.Value, valueIndex, columnIndex int) (value *schema_pb.Value, endValueIndex, endColumnIndex int, err error) {
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:
value, err = toScalarValue(t.GetScalarType(), values, valueIndex, columnIndex)
return value, valueIndex + 1, columnIndex + 1, err
return toScalarValue(t.GetScalarType(), levels, values, valueIndex)
case *schema_pb.Type_ListType:
return toListValue(t.GetListType(), values, valueIndex, columnIndex)
return toListValue(t.GetListType(), levels, values, valueIndex)
case *schema_pb.Type_RecordType:
return toRecordValue(t.GetRecordType(), values, valueIndex, columnIndex)
return toRecordValue(t.GetRecordType(), levels, values, valueIndex)
}
return nil, 0, 0, fmt.Errorf("unsupported type: %v", t)
return nil, valueIndex, fmt.Errorf("unsupported type: %v", t)
}
func toRecordValue(recordType *schema_pb.RecordType, values []parquet.Value, valueIndex, columnIndex int) (*schema_pb.Value, int, int, error) {
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 {
fieldValue, endValueIndex, endColumnIndex, err := ToValue(field.Type, values, valueIndex, columnIndex)
fieldLevels := levels.levels[field.Name]
fieldValue, endValueIndex, err := ToValue(field.Type, fieldLevels, values, valueIndex)
if err != nil {
return nil, 0, 0, err
return nil, 0, err
}
columnIndex = endColumnIndex
valueIndex = endValueIndex
recordValue.Fields[field.Name] = fieldValue
}
return &schema_pb.Value{Kind: &schema_pb.Value_RecordValue{RecordValue: &recordValue}}, valueIndex, columnIndex, nil
return &schema_pb.Value{Kind: &schema_pb.Value_RecordValue{RecordValue: &recordValue}}, valueIndex, nil
}
func toListValue(listType *schema_pb.ListType, values []parquet.Value, valueIndex, columnIndex int) (listValue *schema_pb.Value, endValueIndex, endColumnIndex int, err error) {
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() != columnIndex {
if values[valueIndex].Column() != levels.startColumnIndex {
break
}
value, valueIndex, endColumnIndex, err = ToValue(listType.ElementType, values, valueIndex, columnIndex)
value, valueIndex, err = ToValue(listType.ElementType, levels, values, valueIndex)
if err != nil {
return nil, 0,0, err
return nil, valueIndex, err
}
listValues = append(listValues, value)
}
return &schema_pb.Value{Kind: &schema_pb.Value_ListValue{ListValue: &schema_pb.ListValue{Values: listValues}}}, valueIndex, endColumnIndex, nil
return &schema_pb.Value{Kind: &schema_pb.Value_ListValue{ListValue: &schema_pb.ListValue{Values: listValues}}}, valueIndex, nil
}
func toScalarValue(scalarType schema_pb.ScalarType, values []parquet.Value, valueIndex, columnIndex int) (*schema_pb.Value, error) {
func toScalarValue(scalarType schema_pb.ScalarType, levels *ParquetLevels, values []parquet.Value, valueIndex int) (*schema_pb.Value, int, error) {
value := values[valueIndex]
if value.Column() != columnIndex {
return nil, nil
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()}}, nil
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()}}, nil
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()}}, nil
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()}}, nil
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()}}, nil
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()}}, nil
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())}}, nil
return &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: string(value.ByteArray())}}, valueIndex+1, nil
}
return nil, fmt.Errorf("unsupported scalar type: %v", scalarType)
return nil, valueIndex, fmt.Errorf("unsupported scalar type: %v", scalarType)
}