C# Connecting to Oracle DB DateTime formatting


I have a .Net webapp that is connecting to an Oracle backend.
I have a base page which every page uses where I set my

    protected override void OnPreInit(EventArgs e)
    System.Globalization.CultureInfo cultureInfo =
        new System.Globalization.CultureInfo("en-CA");

    // Creating the DateTime Information specific to our application.
    System.Globalization.DateTimeFormatInfo dateTimeInfo =
        new System.Globalization.DateTimeFormatInfo();

    // Defining various date and time formats.
    dateTimeInfo.DateSeparator = "/";
    dateTimeInfo.LongDatePattern = "dd-MMM-yyyy";
    dateTimeInfo.ShortDatePattern = "dd-MMM-yyyy";
    dateTimeInfo.MonthDayPattern = "dd/MM";
    dateTimeInfo.LongTimePattern = "HH:mm";
    dateTimeInfo.ShortTimePattern = "HH:mm";
    dateTimeInfo.FullDateTimePattern = "dd-MMM-yyyy";

    // Setting application wide date time format.
    cultureInfo.DateTimeFormat = dateTimeInfo;

    // Assigning our custom Culture to the application.
    //Application.CurrentCulture = cultureInfo;
    Thread.CurrentThread.CurrentCulture = cultureInfo;
    Thread.CurrentThread.CurrentUICulture = cultureInfo;

In my application I use an OracleDataAdapter to execute plain text queries on the database.
I am filtering dates like so

"MyDateColumn" = '01-Jan-2000'

This works fine on my local. However when I get to the server the only dates that work in my filter are in the format

"MyDateColumn" = '2000 Jan 01'

What am I missing?

Best Solution

you should always explicitely compare DATE columns to DATE values, i-e:

"MyDateColumn" = to_date('01-Jan-2000', 'dd-Mon-yyyy')

Never rely on implicit date conversion.