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/* eslint-disable @typescript-eslint/ban-ts-comment */ | |
// @ts-nocheck | |
import duckdb from "duckdb"; | |
import assert from "node:assert"; | |
import { tableFromIPC, RecordBatchReader, Table, Int32, makeData, Vector } from "apache-arrow"; | |
const RANGE_SIZE = 1_000; | |
const SQL = `select * from range(0,${RANGE_SIZE}) tbl(i)`; | |
const expectedTable = new Table({ | |
i: new Vector([makeData({ type: new Int32, data: Array.from(new Array(RANGE_SIZE), (x, i) => i) })]), | |
}); | |
async function loadArrowIpc(db) { | |
const ipcStream = await db.arrowIPCStream(SQL); | |
const reader = await RecordBatchReader.from(ipcStream); | |
const table = await tableFromIPC(reader); | |
const actualArray = table.toArray(); | |
console.log(`Columns: ${table.numCols}`); | |
console.log(`Rows: ${table.numRows}`); | |
console.log("Table from stream:", actualArray); | |
assert.deepEqual(actualArray, expectedTable.toArray()); | |
} | |
const db = new duckdb.Database(':memory:'); | |
db.run("INSTALL arrow;", (err) => { | |
assert.ifError(err); | |
db.run("Load arrow;", (err) => { | |
assert.ifError(err); | |
loadArrowIpc(db) | |
.then(() => { | |
process.exit(0); | |
}) | |
.catch(err => { | |
console.error(err); | |
process.exit(1); | |
}); | |
}); | |
}); |
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