Module write

Available on crate feature io_ipc only.

APIs to write to Arrow’s IPC format.

Structs

• DictionaryTracker
  Keeps track of dictionaries that have been written, to avoid emitting the same dictionary multiple times. Can optionally error if an update to an existing dictionary is attempted, which isn’t allowed in the FileWriter.
• EncodedData
  Stores the encoded data, which is an ipc::Schema::Message, and optional Arrow data
• FileWriter
  Arrow file writer
• Record
  An array RecordBatchT with optional accompanying IPC fields.
• StreamWriter
  Arrow stream writer
• WriteOptions
  Options declaring the behaviour of writing to IPC

Enums

• Compression
  Compression codec

Functions

• default_ipc_fields
  Assigns every dictionary field a unique ID
• dictionaries_to_encode
  Find the dictionary that are new and need to be encoded.
• encode_dictionary
  Encode a dictionary array with a certain id.
• encode_new_dictionaries
• encode_record_batch
  Write RecordBatchT into two sets of bytes, one for the header (ipc::Schema::Message) and the other for the batch’s data
• schema_to_bytes
  Converts a ArrowSchema and IpcFields to a flatbuffers-encoded arrow_format::ipc::Message.
• write
  Writes an Array to arrow_data