Function writeParquet

Write Arrow data to a Parquet file.

For example, to create a Parquet file with Snappy compression:

import { tableToIPC } from "apache-arrow";
// Edit the `parquet-wasm` import as necessary
import initWasm, {
  Table,
  WriterPropertiesBuilder,
  Compression,
  writeParquet,
} from "parquet-wasm";

// Instantiate the WebAssembly context
await initWasm();

// Given an existing arrow JS table under `table`
const wasmTable = Table.fromIPCStream(tableToIPC(table, "stream"));
const writerProperties = new WriterPropertiesBuilder()
  .setCompression(Compression.SNAPPY)
  .build();
const parquetUint8Array = writeParquet(wasmTable, writerProperties);
Copy

If writerProperties is not provided or is null, the default writer properties will be used. This is equivalent to new WriterPropertiesBuilder().build().

writeParquet takes ownership of table and writerProperties and frees them, so don't call .free() on either afterwards (it throws null pointer passed to rust) or pass them to another function (it throws Attempt to use a moved value). To write the same data again, create a new Table.