denisgursky opened a new issue, #139: URL: https://github.com/apache/arrow-js/issues/139
```javascript const fs = require("fs"); const { tableFromIPC, RecordBatchReader } = require("apache-arrow"); const filePath = "./arraydata.arrow"; const stream = fs.createReadStream(filePath); const reader = RecordBatchReader.from(stream); (async function () { const table = await tableFromIPC(reader); console.log("numRows", table.numRows); console.log("first row", table.get(0).toArray()); })(); ``` The code above prints: ``` numRows 140000000 first row [ undefined, undefined ] ``` `numRows` is correct, but the values are coming out as `undefined`. `./arraydata.arrow` is generated by the following python code. ```python import pyarrow as pa nums1 = [42] nums2 = [42.42] mil = 1000000 for n in range(1, 140 * mil): nums1.append(n) nums2.append(1 / n) arr1 = pa.array(nums1) arr2 = pa.array(nums2) schema = pa.schema([ pa.field('nums1', arr1.type), pa.field('nums2', arr2.type), ]) with pa.OSFile('arraydata.arrow', 'wb') as sink: with pa.ipc.new_file(sink, schema=schema) as writer: batch = pa.record_batch([arr1, arr2], schema=schema) writer.write(batch) ``` If I lower the number of rows so that the file gets smaller then the values are coming out just fine. Is there a limit? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org