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

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This commit is contained in:
28810
2020-05-24 05:18:45 +08:00
parent e20f5324a0
commit 70266c08c8
9 changed files with 198 additions and 189 deletions
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53
Providers/FreeSql.Provider.Odbc/PostgreSQL/OdbcPostgreSQLExpression.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.Odbc.PostgreSQL
{
@ -483,7 +484,57 @@ namespace FreeSql.Odbc.PostgreSQL
break;
case "Equals": return $"({left} = ({args1})::timestamp)";
case "CompareTo": return $"extract(epoch from ({left})::timestamp-({args1})::timestamp)";
case "ToString": return exp.Arguments.Count == 0 ? $"to_char({left}, 'YYYY-MM-DD HH24:MI:SS.US')" : null;
case "ToString":
left = $"({left})::timestamp";
if (exp.Arguments.Count == 0) return $"to_char({left},'YYYY-MM-DD HH24:MI:SS.US')";
switch (args1)
{
case "'yyyy-MM-dd HH:mm:ss'": return $"to_char({left},'YYYY-MM-DD HH24:MI:SS')";
case "'yyyy-MM-dd HH:mm'": return $"to_char({left},'YYYY-MM-DD HH24:MI')";
case "'yyyy-MM-dd HH'": return $"to_char({left},'YYYY-MM-DD HH24')";
case "'yyyy-MM-dd'": return $"to_char({left},'YYYY-MM-DD')";
case "'yyyy-MM'": return $"to_char({left},'YYYY-MM')";
case "'yyyyMMddHHmmss'": return $"to_char({left},'YYYYMMDDHH24MISS')";
case "'yyyyMMddHHmm'": return $"to_char({left},'YYYYMMDDHH24MI')";
case "'yyyyMMddHH'": return $"to_char({left},'YYYYMMDDHH24')";
case "'yyyyMMdd'": return $"to_char({left},'YYYYMMDD')";
case "'yyyyMM'": return $"to_char({left},'YYYYMM')";
case "'yyyy'": return $"to_char({left},'YYYY')";
case "'HH:mm:ss'": return $"to_char({left},'HH24:MI:SS')";
}
args1 = Regex.Replace(args1, "(yyyy|yy|MM|dd|HH|hh|mm|ss|tt)", m =>
{
switch (m.Groups[1].Value)
{
case "yyyy": return $"YYYY";
case "yy": return $"YY";
case "MM": return $"%_a1";
case "dd": return $"%_a2";
case "HH": return $"%_a3";
case "hh": return $"%_a4";
case "mm": return $"%_a5";
case "ss": return $"SS";
case "tt": return $"%_a6";
}
return m.Groups[0].Value;
});
var isMatched = false;
args1 = Regex.Replace(args1, "(M|d|H|h|m|s|t)", m =>
{
isMatched = true;
switch (m.Groups[1].Value)
{
case "M": return $"') || ltrim(to_char({left},'MM'),'0') || to_char({left},'";
case "d": return $"') || case when substr(to_char({left},'DD'),1,1) = '0' then substr(to_char({left},'DD'),2,1) else to_char({left},'DD') end || to_char({left},'";
case "H": return $"') || case when substr(to_char({left},'HH24'),1,1) = '0' then substr(to_char({left},'HH24'),2,1) else to_char({left},'HH24') end || to_char({left},'";
case "h": return $"') || case when substr(to_char({left},'HH12'),1,1) = '0' then substr(to_char({left},'HH12'),2,1) else to_char({left},'HH12') end || to_char({left},'";
case "m": return $"') || case when substr(to_char({left},'MI'),1,1) = '0' then substr(to_char({left},'MI'),2,1) else to_char({left},'MI') end || to_char({left},'";
case "s": return $"') || case when substr(to_char({left},'SS'),1,1) = '0' then substr(to_char({left},'SS'),2,1) else to_char({left},'SS') end || to_char({left},'";
case "t": return $"') || rtrim(to_char({left},'AM'),'M') || to_char({left},'";
}
return m.Groups[0].Value;
}).Replace("%_a1", "MM").Replace("%_a2", "DD").Replace("%_a3", "HH24").Replace("%_a4", "HH12").Replace("%_a5", "MI").Replace("%_a6", "AM");
return isMatched == false ? $"to_char({left},{args1})" : $"(to_char({left},{args1}))".Replace($"to_char({left},'')", "''");
}
}
return null;