Node.JS如何创建镶木地板文件并将其保存到Minio

时间:2019-11-15 14:30:35

标签: node.js parquet minio

以NPM文档(https://www.npmjs.com/package/parquets)中的以下示例为例,如何将生成的实木复合地板文件直接写入minio。我要避免将镶木地板文件写入磁盘,然后再执行第二次操作以将文件移至minio。

下面的示例在调用close()后立即将文件写入磁盘。

// advanced fruits table
let schema = new ParquetSchema({
  name: { type: 'UTF8' },
  colours: { type: 'UTF8', repeated: true },
  stock: {
    repeated: true,
    fields: {
      price: { type: 'DOUBLE' },
      quantity: { type: 'INT64' },
    }
  }
});

// the above schema allows us to store the following rows:
let writer = await ParquetWriter.openFile(schema, 'fruits.parquet');

await writer.appendRow({
  name: 'banana',
  colours: ['yellow'],
  stock: [
    { price: 2.45, quantity: 16 },
    { price: 2.60, quantity: 420 }
  ]
});

await writer.appendRow({
  name: 'apple',
  colours: ['red', 'green'],
  stock: [
    { price: 1.20, quantity: 42 },
    { price: 1.30, quantity: 230 }
  ]
});

await writer.close();

0 个答案:

没有答案