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Merge pull request #1973 from EsonXie/master

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fix:修复达梦数据库上时间相减永远输出为0的问题
This commit is contained in:
2881099
2025-02-07 17:37:24 +08:00
committed by GitHub
parent 63fcb5cfbf e2d7b56c6b
commit 5f36b72e7e
2 changed files with 55 additions and 6 deletions
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48
FreeSql.Tests/FreeSql.Tests/Internal/CommonExpressionTest.cs
View File

@@ -301,6 +301,8 @@ FROM (
GROUP BY a.""EntityId"", b.""StartDateTime"", b.""EndDateTime"" ) a", sql);
}
public class IIFTest02Model1
{
public long _Id { get; set; }
@@ -324,5 +326,51 @@ FROM (
public DateTime EndDateTime { get; set; }
}
[Fact]
public void IIFTest03()
{
var parameters = new List<DbParameter>();
var fsql = g.dameng;
var sql = "";
var startTime = DateTime.UtcNow;
//fsql.CodeFirst.SyncStructure<IIFTest03Model>();
//fsql.Insert(new IIFTest03Model { StartDateTime = startTime, EndDateTime = startTime.AddHours(1) }).ExecuteAffrows();
var query = fsql.Select<IIFTest03Model>();
//sql = query.ToSql(model => new
//{
// Timespan = (model.EndDateTime - model.StartDateTime).TotalSeconds,
//});
var result = query.ToList(model => new
{
Timespan = (model.EndDateTime - model.StartDateTime),
});
// sql = query.ToSql();
// Assert.Equal($@"SELECT *
//FROM (
// SELECT a.""EntityId"", b.""StartDateTime"" ""DateTime"", sum(((strftime('%s',case when a.""StopTime"" > b.""EndDateTime"" then b.""EndDateTime"" else a.""StopTime"" end)-strftime('%s',case when a.""StartTime"" < b.""StartDateTime"" then b.""StartDateTime"" else a.""StartTime"" end)))) ""TotalRunTime"", count(1) ""Count""
// FROM ""IIFTest02Model1"" a
// INNER JOIN ""IIFTest02Model2"" b ON b.""StartDateTime"" = '{startTime.ToString("yyyy-MM-dd HH:mm:ss")}' AND a.""StartTime"" <= b.""EndDateTime"" AND a.""StopTime"" > b.""StartDateTime""
// GROUP BY a.""EntityId"", b.""StartDateTime"", b.""EndDateTime"" ) a", sql);
}
/// <summary>
/// 任务统计日期
/// </summary>
public class IIFTest03Model
{
public long Id { get; set; }
public DateTime StartDateTime { get; set; }
public DateTime EndDateTime { get; set; }
}
}
}

13
Providers/FreeSql.Provider.Dameng/DamengExpression.cs
View File

@@ -389,11 +389,11 @@ namespace FreeSql.Dameng
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
switch (memberName)
{
case "TotalDays": return $"(cast({getExp(date1)} as timestamp with time zone)-{getExp(date2)})";
case "TotalHours": return $"((cast({getExp(date1)} as timestamp with time zone)-{getExp(date2)})*24)";
case "TotalMilliseconds": return $"((cast({getExp(date1)} as timestamp with time zone)-{getExp(date2)})*{24 * 60 * 60 * 1000})";
case "TotalMinutes": return $"((cast({getExp(date1)} as timestamp with time zone)-{getExp(date2)})*{24 * 60})";
case "TotalSeconds": return $"((cast({getExp(date1)} as timestamp with time zone)-{getExp(date2)})*{24 * 60 * 60})";
case "TotalDays": return $"DATEDIFF(Day, {getExp(date2)}, {getExp(date1)})";
case "TotalHours": return $"DATEDIFF(Hour, {getExp(date2)}, {getExp(date1)})";
case "TotalMilliseconds": return $"DATEDIFF(MS, {getExp(date2)}, {getExp(date1)})";
case "TotalMinutes": return $"DATEDIFF(Minute, {getExp(date2)}, {getExp(date1)})";
case "TotalSeconds": return $"DATEDIFF(Second, {getExp(date2)}, {getExp(date1)})";
}
return null;
}
@@ -435,7 +435,8 @@ namespace FreeSql.Dameng
case "Subtract":
switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().FirstOrDefault() : exp.Arguments[0].Type).FullName)
{
case "System.DateTime": return $"((cast({left} as timestamp with time zone)-{args1})*{24 * 60 * 60})";
//case "System.DateTime": return $"((cast({left} as timestamp with time zone)-{args1})*{24 * 60 * 60})";
case "System.DateTime": return $"DATEDIFF(Second, {args1}, {left})";
}
break;
case "Equals": return $"({left} = {args1})";