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sqlite support datediff

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sunkaixuan 2022-03-22 22:39:20 +08:00
parent 766cbb41bc
commit d9e8f79108
2 changed files with 34 additions and 0 deletions
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26
Src/Asp.Net/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs
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@ -14,6 +14,32 @@ namespace SqlSugar
}
public class SqliteMethod : DefaultDbMethod, IDbMethods
{
public override string DateDiff(MethodCallExpressionModel model)
{
var parameter = (DateType)(Enum.Parse(typeof(DateType), model.Args[0].MemberValue.ObjToString()));
var begin = model.Args[1].MemberName;
var end = model.Args[2].MemberName;
switch (parameter)
{
case DateType.Year:
return $" ( strftime('%Y',{end}) - strftime('%Y',{begin}) )";
case DateType.Month:
return $" ( (strftime('%m',{end}) - strftime('%m',{begin}))+(strftime('%Y',{end}) - strftime('%Y',{begin}))*12 )";
case DateType.Day:
return $" (julianday( strftime('%Y-%m-%d',datetime({end})) )-julianday(strftime('%Y-%m-%d',datetime({begin})))) ";
case DateType.Hour:
return $" ((julianday( strftime('%Y-%m-%d %H:%M',datetime({end})) )- julianday(strftime('%Y-%m-%d %H:%M',datetime({begin}))))*24 )";
case DateType.Minute:
return $" ((julianday( strftime('%Y-%m-%d %H:%M',datetime({end})) )- julianday(strftime('%Y-%m-%d %H:%M',datetime({begin}))))*24*60 )";
case DateType.Second:
return $" ((julianday( strftime('%Y-%m-%d %H:%M:%S',datetime({end})) )- julianday(strftime('%Y-%m-%d %H:%M:%S',datetime({begin}))))*24*60*60 )";
case DateType.Millisecond:
break;
default:
break;
}
throw new Exception(parameter + " datediff no support");
}
public override string Length(MethodCallExpressionModel model)
{
var parameter = model.Args[0];

8
Src/Asp.Net/SqliteTest/Demo/Demo1_Queryable.cs
View File

@ -43,6 +43,14 @@ namespace OrmTest
var getByFuns = db.Queryable<Order>().Where(it => SqlFunc.IsNullOrEmpty(it.Name)).ToList();
var getByFuns2 = db.Queryable<Order>().GroupBy(it => it.Name).Select(it => SqlFunc.AggregateDistinctCount(it.Price)).ToList();
var fromatList = db.Queryable<Order>().Select(it=>it.CreateTime.ToString("%Y-%m")).ToList();
var btime = Convert.ToDateTime("2021-1-1");
var etime = Convert.ToDateTime("2022-1-12");
var test01 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Year, btime, etime)).ToList();
var test02 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Day, btime, etime)).ToList();
var test03 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Month, btime, etime)).ToList();
var test04 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Second, DateTime.Now, DateTime.Now.AddMinutes(2))).ToList();
var test05 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Minute, DateTime.Now, DateTime.Now.AddMinutes(21))).ToList();
var test06 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Hour, DateTime.Now, DateTime.Now.AddHours(3))).ToList();
Console.WriteLine("#### Examples End ####");
}