0

试图将 CSV 数据复制到 AlaSQL 的内部表。但是SELECT * INTO tab FROM CSV()——根本行不通。在这之后没有任何改变。表tab仍然是空的，但直接选择工作正常。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>

4

1 回答 1

1

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

要解决他的问题，您可以对总语句的每个异步卡盘使用承诺符号：

<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>
于 2016-10-26T11:29:40.893 回答