javascript - AlaSQL从CSV插入表不起作用

尝试将CSV数据复制到AlaSQL的内部表中。
但是SELECT * INTO tab FROM CSV()-根本行不通。此后没有任何变化。表tab仍然为空，但是直接选择可以正常工作。我做错了什么？

<!DOCTYPE html>
<html>
<head>
	<title></title>
</head>
<body>
  <div id="res1"></div>
  <div id="res2"></div>
	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/alasql/0.3.3/alasql.min.js"></script>

	<script type="text/sql" id='sql'>
		CREATE table tab(c1 integer);

		select count(*) as c1
		INTO tab
		from CSV("https://rawgit.com/thephpleague/csv/master/examples/data/prenoms.csv");
		-- tab still empty!

		select *
		into HTML("#res1",{headers:true})
		from tab;

		--direct select works
		select count(*) as c1
		into HTML("#res2",{headers:true})
		from CSV("https://rawgit.com/thephpleague/csv/master/examples/data/prenoms.csv");

	</script>
	<script type="text/javascript">
		alasql('SOURCE "#sql"')
	</script>

</body>
</html>

最佳答案

与文件交互将使请求异步。目前，lib无法弄清楚如何等待多语句命令中异步语句的响应。

要解决他的问题，您可以对total语句的每个异步卡盘使用promise符号：

<script type="text/sql" id='sql'>
    CREATE table tab(c1 integer);

    select count(*) as c1
    INTO tab
    from CSV("https://rawgit.com/thephpleague/csv/master/examples/data/prenoms.csv");
    -- tab still empty!
</script>
<script type="text/sql" id='sql2'>
    select *
    into HTML("#res1",{headers:true})
    from tab;

    --direct select works
    select count(*) as c1
    into HTML("#res2",{headers:true})
    from CSV("https://rawgit.com/thephpleague/csv/master/examples/data/prenoms.csv");

</script>
<script type="text/javascript">
    alasql.promise(['SOURCE "#sql"','SOURCE "#sql2"'])
</script>

关于javascript - AlaSQL从CSV插入表不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40167060/