tk/FreeSql
1
0
Fork 0
mirror of https://github.com/nsnail/FreeSql.git synced 2025-11-04 17:20:49 +08:00
Code Issues Packages Projects Releases Wiki Activity

- 增加 SqlServer 表达式解析 yyyyMMdd 常用 c# 日期格式化；

Browse Source
This commit is contained in:
28810
2020-05-24 02:05:05 +08:00
parent bc215fd41c
commit 657b3c6f43
4 changed files with 136 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
Providers/FreeSql.Provider.SqlServer/SqlServerExpression.cs
View File

@@ -1,11 +1,10 @@
using FreeSql.Internal;
using FreeSql.Internal.Model;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Text.RegularExpressions;
namespace FreeSql.SqlServer
{
@@ -374,7 +373,47 @@ namespace FreeSql.SqlServer
break;
case "Equals": return $"({left} = {args1})";
case "CompareTo": return $"datediff(second,{args1},{left})";
case "ToString": return exp.Arguments.Count == 0 ? $"convert(varchar, {left}, 121)" : null;
case "ToString":
if (exp.Arguments.Count == 0) return $"convert(varchar, cast({left} as datetime), 121)";
left = $"cast({left} as datetime)";
switch (args1.TrimStart('N'))
{
case "'yyyy-MM-dd HH:mm:ss'": return $"convert(char(19), {left}, 120)";
case "'yyyy-MM-dd HH:mm'": return $"substring(convert(char(19), {left}, 120), 1, 16)";
case "'yyyy-MM-dd HH'": return $"substring(convert(char(19), {left}, 120), 1, 13)";
case "'yyyy-MM-dd'": return $"convert(char(10), {left}, 23)";
case "'yyyy-MM'": return $"substring(convert(char(10), {left}, 23), 1, 7)";
case "'yyyyMMdd'": return $"convert(char(8), {left}, 112)";
case "'yyyyMM'": return $"substring(convert(char(8), {left}, 112), 1, 6)";
case "'yyyy'": return $"substring(convert(char(8), {left}, 112), 1, 4)";
case "'HH:mm:ss'": return $"convert(char(8), {left}, 24)";
}
var nchar = args1.StartsWith("N'") ? "N" : "";
return Regex.Replace(args1, "(yyyy|yy|MM|M|dd|d|HH|H|hh|h|mm|m|ss|s|tt|t)", m =>
{
switch (m.Groups[1].Value)
{
case "yyyy": return $"' + substring(convert(char(8), {left}, 112), 1, 4) + {nchar}'";
case "yy": return $"' + substring(convert(char(6), {left}, 12), 1, 2) + {nchar}'";
case "MM": return $"' + substring(convert(char(6), {left}, 12), 3, 2) + {nchar}'";
case "M": return $"' + case when substring(convert(char(6), {left}, 12), 3, 1) = '0' then substring(convert(char(6), {left}, 12), 4, 1) else substring(convert(char(6), {left}, 12), 3, 2) end + {nchar}'";
case "dd": return $"' + substring(convert(char(6), {left}, 12), 5, 2) + {nchar}'";
case "d": return $"' + case when substring(convert(char(6), {left}, 12), 5, 1) = '0' then substring(convert(char(6), {left}, 12), 6, 1) else substring(convert(char(6), {left}, 12), 5, 2) end + {nchar}'";
case "HH": return $"' + substring(convert(char(8), {left}, 24), 1, 2) + {nchar}'";
case "H": return $"' + case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end + {nchar}'";
case "hh": return $"' + case cast(case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end as int) % 12" +
$"when 0 then '12' when 1 then '01' when 2 then '02' when 3 then '03' when 4 then '04' when 5 then '05' when 6 then '06' when 7 then '07' when 8 then '08' when 9 then '09' when 10 then '10' when 11 then '11' end + {nchar}'";
case "h": return $"' + case cast(case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end as int) % 12" +
$"when 0 then '12' when 1 then '1' when 2 then '2' when 3 then '3' when 4 then '4' when 5 then '5' when 6 then '6' when 7 then '7' when 8 then '8' when 9 then '9' when 10 then '10' when 11 then '11' end + {nchar}'";
case "mm": return $"' + substring(convert(char(8), {left}, 24), 4, 2) + {nchar}'";
case "m": return $"' + case when substring(convert(char(8), {left}, 24), 4, 1) = '0' then substring(convert(char(8), {left}, 24), 5, 1) else substring(convert(char(8), {left}, 24), 4, 2) end + {nchar}'";
case "ss": return $"' + substring(convert(char(8), {left}, 24), 7, 2) + {nchar}'";
case "s": return $"' + case when substring(convert(char(8), {left}, 24), 7, 1) = '0' then substring(convert(char(8), {left}, 24), 8, 1) else substring(convert(char(8), {left}, 24), 7, 2) end + {nchar}'";
case "tt": return $"' + case when cast(case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end as int) >= 12 then 'PM' else 'AM' end + {nchar}'";
case "t": return $"' + case when cast(case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end as int) >= 12 then 'P' else 'A' end + {nchar}'";
}
return m.Groups[0].Value;
});
}
}
return null;