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- 增加 MySq 表达式解析 yyyyMMdd 常用 c# 日期格式化；

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28810
2020-05-24 02:46:19 +08:00
parent 657b3c6f43
commit 08713fba71
7 changed files with 211 additions and 61 deletions
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50
Providers/FreeSql.Provider.MySql/MySqlExpression.cs
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@ -6,6 +6,7 @@ using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Text.RegularExpressions;
namespace FreeSql.MySql
{
@ -392,7 +393,54 @@ namespace FreeSql.MySql
break;
case "Equals": return $"({left} = {args1})";
case "CompareTo": return $"timestampdiff(microsecond,{args1},{left})";
case "ToString": return exp.Arguments.Count == 0 ? $"date_format({left}, '%Y-%m-%d %H:%i:%s.%f')" : null;
case "ToString":
if (exp.Arguments.Count == 0) return $"date_format({left}, '%Y-%m-%d %H:%i:%s.%f')";
switch (args1)
{
case "'yyyy-MM-dd HH:mm:ss'": return $"date_format({left}, '%Y-%m-%d %H:%i:%s')";
case "'yyyy-MM-dd HH:mm'": return $"date_format({left}, '%Y-%m-%d %H:%i')";
case "'yyyy-MM-dd HH'": return $"date_format({left}, '%Y-%m-%d %H')";
case "'yyyy-MM-dd'": return $"date_format({left}, '%Y-%m-%d')";
case "'yyyy-MM'": return $"date_format({left}, '%Y-%m')";
case "'yyyyMMdd'": return $"date_format({left}, '%Y%m%d')";
case "'yyyyMM'": return $"date_format({left}, '%Y%m')";
case "'yyyy'": return $"date_format({left}, '%Y')";
case "'HH:mm:ss'": return $"date_format({left}, '%H:%i:%s')";
}
args1 = Regex.Replace(args1, "(yyyy|yy|MM|M|dd|d|HH|H|hh|h|mm|ss|tt)", m =>
{
switch (m.Groups[1].Value)
{
case "yyyy": return $"%Y";
case "yy": return $"%y";
case "MM": return $"%_a1";
case "M": return $"%c";
case "dd": return $"%d";
case "d": return $"%e";
case "HH": return $"%H";
case "H": return $"%k";
case "hh": return $"%h";
case "h": return $"%l";
case "mm": return $"%i";
case "ss": return $"%_a2";
case "tt": return $"%p";
}
return m.Groups[0].Value;
});
var isMatched = false;
args1 = Regex.Replace(args1, "(m|s|t)", m =>
{
isMatched = true;
switch (m.Groups[1].Value)
{
case "m": return $"'), trim(leading '0' from date_format({left}, '%i')), date_format({left}, '";
case "s": return $"'), trim(leading '0' from date_format({left}, '%s')), date_format({left}, '";
case "t": return $"'), trim(trailing 'M' from date_format({left}, '%p')), date_format({left}, '";
}
return m.Groups[0].Value;
}).Replace("%_a1", "%m").Replace("%_a2", "%s");
return isMatched == false ? $"date_format({left}, {args1})" : $"concat(date_format({left}, {args1}))".Replace($"date_format({left}, '')", "''");
}
}
return null;