"conversion from int to DATE is unsupported" when calling ResultSet.getDate() on a result containing a NULL literal

Driver version or jar name

com.microsoft.sqlserver:mssql-jdbc:6.2.1.jre8

SQL Server version

Microsoft SQL Server 2014 - 12.0.2000.8 (X64) Feb 20 2014 20:04:26 Copyright © Microsoft Corporation Express Edition (64-bit) on Windows NT 6.3 <X64> (Build 14393: )

Client operating system

Windows 10

Java/JVM version

java version “1.8.0_131” Java™ SE Runtime Environment (build 1.8.0_131-b11) Java HotSpot™ 64-Bit Server VM (build 25.131-b11, mixed mode)

Table schema

N/A

Problem description

Calling ResultSet.getDate() should work on all NULL values, regardless of their type.

Expected behavior and actual behavior

Expected:

assertNull(rs.getDate(1));

I’ve tried the repro code on MySQL, H2, Oracle (including a from dual clause, of course), PostgreSQL, and it always works as expected.

Actual:

com.microsoft.sqlserver.jdbc.SQLServerException: The conversion from int to DATE is unsupported.
	at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:227)
	at com.microsoft.sqlserver.jdbc.DataTypes.throwConversionError(DataTypes.java:1612)
	at com.microsoft.sqlserver.jdbc.ServerDTVImpl.getValue(dtv.java:3779)
	at com.microsoft.sqlserver.jdbc.DTV.getValue(dtv.java:286)
	at com.microsoft.sqlserver.jdbc.Column.getValue(Column.java:189)
	at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getValue(SQLServerResultSet.java:1925)
	at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getValue(SQLServerResultSet.java:1906)
	at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getDate(SQLServerResultSet.java:2057)
	at SQLServer.main(SQLServer.java:62)

Repro code

try (Statement s = c.createStatement();
     ResultSet rs = s.executeQuery("select null")) {

    while (rs.next())
        System.out.println(rs.getDate(1));
}

[lukaseder]

@v-afrafi Thanks for the quick fix. As far as I’m concerned, I’ll trust you on your judgment and wait until the release of this issue - I’m not in a hurry 😃

Thanks again

[AfsanehR-zz]

@lukaseder This fix was made with 6.3.3.jre*-preview and will be included in the next production ready release (version 6.4.0) . Thanks for the idea, will definitely keep that information on the issues as well!