[ 
http://tracker.firebirdsql.org/browse/DNET-654?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Jiri Cincura reopened DNET-654:
-------------------------------


> Trimming ten-thousandths of a second during TIMESPAN conversion to the 
> DateTime in the NET Provider for Firebird.
> -----------------------------------------------------------------------------------------------------------------
>
>                 Key: DNET-654
>                 URL: http://tracker.firebirdsql.org/browse/DNET-654
>             Project: .NET Data provider
>          Issue Type: Bug
>          Components: ADO.NET Provider
>    Affects Versions: 4.7.0.0
>         Environment: Windows 10, 64-bit
>            Reporter: Kamil Kocian
>            Assignee: Jiri Cincura
>             Fix For: vNext
>
>
> The NET Provider for Firebird trims ten-thousandths of a second during 
> TIMESPAN conversion to the .NET DateTime type in method 
> TypeDecoder.DecodeTime(int sql_time). Trimming the ten-thousandths of a 
> second is causing problem when comparing time read from Firebird to .NET and 
> using the value again in SQL statements. 
> However it is possible to initialize .NET type DateTime(or TimeSpan) with 
> number of ticks, this way keeping the precision of Firebird TIMESTAMP in 
> .NET. 
> Problematic source code in 
> FirebirdSql.Data.FirebirdClient\Common\TypeDecoder.cs :
> public static TimeSpan DecodeTime(int sql_time)
> {
>       int millisInDay = sql_time / 10;
>       int hour = millisInDay / 3600000;
>       int minute = (millisInDay - hour * 3600000) / 60000;
>       int second = (millisInDay - hour * 3600000 - minute * 60000) / 1000;
>       int millisecond = millisInDay - hour * 3600000 - minute * 60000 - 
> second * 1000;
>       return new TimeSpan(0, hour, minute, second, millisecond);
> }

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