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- 增加 达梦 表达式解析 yyyyMMdd 常用 c# 日期格式化；

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28810
2020-05-24 08:23:04 +08:00
parent 2a42731134
commit 368da0b04e
13 changed files with 411 additions and 205 deletions
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66
Providers/FreeSql.Provider.Dameng/DamengExpression.cs
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@ -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.Dameng
{
@ -193,7 +192,7 @@ namespace FreeSql.Dameng
{
case "Date": return $"trunc({left})";
case "TimeOfDay": return $"(cast({left} as timestamp with time zone)-trunc({left}))";
case "DayOfWeek": return $"case when to_char({left})='7' then 0 else cast(to_char({left}) as number) end";
case "DayOfWeek": return $"case when to_char({left},'D')='7' then 0 else cast(to_char({left},'D') as number) end";
case "Day": return $"cast(to_char({left},'DD') as number)";
case "DayOfYear": return $"cast(to_char({left},'DDD') as number)";
case "Month": return $"cast(to_char({left},'MM') as number)";
@ -361,7 +360,7 @@ namespace FreeSql.Dameng
switch (exp.Method.Name)
{
case "Compare": return $"extract(day from ({getExp(exp.Arguments[0])}-({getExp(exp.Arguments[1])})))";
case "DaysInMonth": return $"cast(to_char(last_day(({getExp(exp.Arguments[0])})||'-'||({getExp(exp.Arguments[1])})||'-01'),'DD') as number)";
case "DaysInMonth": return $"cast(to_char(last_day(to_date(({getExp(exp.Arguments[0])})||'-'||({getExp(exp.Arguments[1])})||'-01','yyyy-mm-dd')),'DD') as number)";
case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
case "IsLeapYear":
@ -398,7 +397,64 @@ namespace FreeSql.Dameng
break;
case "Equals": return $"({left} = {args1})";
case "CompareTo": return $"extract(day from ({left}-({args1})))";
case "ToString": return exp.Arguments.Count == 0 ? $"to_char({left},'YYYY-MM-DD HH24:MI:SS.FF6')" : null;
case "ToString":
if (left.StartsWith("'") || left.EndsWith("'")) left = $"to_timestamp({left},'YYYY-MM-DD HH24:MI:SS.FF6')";
if (exp.Arguments.Count == 0) return $"to_char({left},'YYYY-MM-DD HH24:MI:SS.FF6')";
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 "mm": return "%_a4";
case "ss": return "SS";
case "tt": return "%_a5";
}
return m.Groups[0].Value;
});
var argsFinds = new[] { "YYYY", "YY", "%_a1", "%_a2", "%_a3", "%_a4", "SS", "%_a5" };
var argsSpts = Regex.Split(args1, "(M|d|H|hh|h|m|s|t)");
for (var a = 0; a < argsSpts.Length; a++)
{
switch (argsSpts[a])
{
case "M": argsSpts[a] = $"ltrim(to_char({left},'MM'),'0')"; break;
case "d": argsSpts[a] = $"case when substr(to_char({left},'DD'),1,1) = '0' then substr(to_char({left},'DD'),2,1) else to_char({left},'DD') end"; break;
case "H": argsSpts[a] = $"case when substr(to_char({left},'HH24'),1,1) = '0' then substr(to_char({left},'HH24'),2,1) else to_char({left},'HH24') end"; break;
case "hh": argsSpts[a] = $"case mod(cast(case when substr(to_char({left},'HH24'),1,1) = '0' then substr(to_char({left},'HH24'),2,1) else to_char({left},'HH24') end as number),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"; break;
case "h": argsSpts[a] = $"case mod(cast(case when substr(to_char({left},'HH24'),1,1) = '0' then substr(to_char({left},'HH24'),2,1) else to_char({left},'HH24') end as number),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"; break;
case "m": argsSpts[a] = $"case when substr(to_char({left},'MI'),1,1) = '0' then substr(to_char({left},'MI'),2,1) else to_char({left},'MI') end"; break;
case "s": argsSpts[a] = $"case when substr(to_char({left},'SS'),1,1) = '0' then substr(to_char({left},'SS'),2,1) else to_char({left},'SS') end"; break;
case "t": argsSpts[a] = $"rtrim(to_char({left},'AM'),'M')"; break;
default:
var argsSptsA = argsSpts[a];
if (argsSptsA.StartsWith("'")) argsSptsA = argsSptsA.Substring(1);
if (argsSptsA.EndsWith("'")) argsSptsA = argsSptsA.Remove(argsSptsA.Length - 1);
argsSpts[a] = argsFinds.Any(m => argsSptsA.Contains(m)) ? $"to_char({left},'{argsSptsA}')" : $"'{argsSptsA}'";
break;
//达梦 to_char(to_timestamp('2020-02-01 00:00:00.000000','YYYY-MM-DD HH24:MI:SS.FF6'),' ') 无效
}
}
if (argsSpts.Length > 0) args1 = $"({string.Join(" || ", argsSpts.Where(a => a != "''"))})";
return args1.Replace("%_a1", "MM").Replace("%_a2", "DD").Replace("%_a3", "HH24").Replace("%_a4", "MI").Replace("%_a5", "AM");
}
}
return null;