golang db.Prepare select top ? order by ?
golang db.Prepare select top ? order by ?
xiny120
发布于 2019-06-11 11:24:56
发布于 2019-06-11 11:24:56
用的这个驱动 _ "github.com/go-sql-driver/mysql" 经过测试，貌似golang的 db.Prepare在查询字符串中 不能使用 select top ? ... order by ? 这样的两个地方不能使用通配符啊。好奇怪。比如： 下面的代码就不行。
sqlstr := `
select top ?
a.[Id], a.[CreateDate],a.[PublisherId],a.[NickName],a.[FileSize],a.[Followed],
a.[Readed],a.[FilePath], b.[STitle],a.[CreateDate],a.[Encryptioned],a.[FileName]
from [hds12204021_db].[dbo].[Web2019_historylist] a, [hds12204021_db].[dbo].[Web2019_roomlist] b
where a.roomid = ? and a.Deleted = 0 and a.roomid=b.id and a.[CreateDate] < ?
order by ? desc
`
log.Println(sqlstr)
stmt1, err0 := db.Prepare(sqlstr)如下错误：
2019/05/29 11:21:50 apis_public.go:343:
select top ?
a.[Id], a.[CreateDate],a.[PublisherId],a.[NickName],a.[FileSize],a.[Followed],
a.[Readed],a.[FilePath], b.[STitle],a.[CreateDate],a.[Encryptioned],a.[FileName]
from [hds12204021_db].[dbo].[Web2019_historylist] a, [hds12204021_db].[dbo].[Web2019_roomlist] b
where a.roomid = ? and a.Deleted = 0 and a.roomid=b.id and a.[CreateDate] < ?
order by ? desc
2019/05/29 11:21:51 apis_public.go:346: ServeSrs sql db.Prepare error发生意外。 (语法错误或违反访问规则)如果改成写死的参数，如下，就OK了。备注一下：
sqlstr := `
select top 20
a.[Id], a.[CreateDate],a.[PublisherId],a.[NickName],a.[FileSize],a.[Followed],
a.[Readed],a.[FilePath], b.[STitle],a.[CreateDate],a.[Encryptioned],a.[FileName]
from [hds12204021_db].[dbo].[Web2019_historylist] a, [hds12204021_db].[dbo].[Web2019_roomlist] b
where a.roomid = ? and a.Deleted = 0 and a.roomid=b.id and a.[CreateDate] < ?
order by a.CreateDate desc
`
log.Println(sqlstr)
stmt1, err0 := db.Prepare(sqlstr)本文参与 腾讯云自媒体分享计划，分享自作者个人站点/博客。
原始发表：2019.05.29 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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