问题描述
我需要选择一列的枚举值.通过搜索，我发现了两种方法:
I need to select the enum values of a column. From searching I've found two ways:
SELECT column_type FROM information_schema.columns
WHERE table_name = 'MyTable' AND column_name = 'MyColumn';
和另一个:
SHOW COLUMNS FROM `mytable` WHERE field = 'type';
尽管第一个查询将为我提供此信息:
Although the first query will give me this info:
enum('value1','value2','value3')
第二个查询为我提供了相同的内容，并带有其他列.我宁愿只获取那些没有 enum()和逗号的值，这是可能的，还是我需要解析这些值?并不是仅检查是否有更简单的方法就很困难.
The second query gives me the same and with additional columns as well. I would prefer to just get those values without the enum() and commas, is it possible, or do I need to parse the values out? Not that it's hard just checking if there is an easier way.
假设没有更简单的方法，则以上两个查询中哪个更适合使用?我注意到第二个查询在运行时没有显示查询时间，我几乎认为它根本不需要任何时间.但是，如果我打开分析器，则可以看到它确实需要时间，但是看起来更快一些.那么第二个查询会更有效吗?
Assuming there is no easier way, which of the two queries above is better to use? I noticed that the second query doesn't show the query time when I ran it, I almost thought it didn't require any time at all. But if I turn on the profiler I can see that it does take time, but it seem a bit faster. So would the second query be more efficient?
推荐答案
我想您无法选择这些值，我最终用以下方法解析出这些值:
I guess you can't select those values out, I ended up parsing the values out with this:
$result = str_replace(array("enum('", "')", "''"), array('', '', "'"), $result);
$arr = explode("','", $result);
return $arr;
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