我尝试使用parquetjs:
https://www.npmjs.com/package/parquetjs
示例代码:
var parquet = require('parquetjs');
// declare a schema for the `fruits` table
var schema = new parquet.ParquetSchema({
name: { type: 'UTF8' },
quantity: { type: 'INT64' },
price: { type: 'DOUBLE' },
date: { type: 'TIMESTAMP_MILLIS' },
in_stock: { type: 'BOOLEAN' }
});
// create new ParquetWriter that writes to 'fruits.parquet'
var writer = await parquet.ParquetWriter.openFile(schema, 'fruits.parquet');
// append a few rows to the file
await writer.appendRow({name: 'apples', quantity: 10, price: 2.5, date: new Date(), in_stock: true});
await writer.appendRow({name: 'oranges', quantity: 10, price: 2.5, date: new Date(), in_stock: true});
错误:
SyntaxError: await is only valid in async function
应该是什么问题(因为他们将其发布为示例)?
答案 0 :(得分:0)
SyntaxError: await is only valid in async function
这意味着您只能在函数签名中具有await
关键字的函数中使用async
关键字。
为快速解决,您可以使用async
IIFE。
(async() => {
// create new ParquetWriter that writes to 'fruits.parquet'
var writer = await parquet.ParquetWriter.openFile(schema, 'fruits.parquet');
// append a few rows to the file
await writer.appendRow({name: 'apples', quantity: 10, price: 2.5, date: new Date(), in_stock: true});
await writer.appendRow({name: 'oranges', quantity: 10, price: 2.5, date: new Date(), in_stock: true});
})()