Bug 213959 [Regression]Blob computed column doesn't work
Description: [Regression]Blob type computed column doesn't work Build number: 2.3.0.v20071228-1005 Steps to reproduce: 1, New a sampleDB from table PRODUCTLINE 2, New a computed column A; type is Blob; expression is row["IMAGE"] 3, Preview in dataset Expected result: The dataset can be preview ok Actual result: Error happened Error log: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Data Engine Plug-in ID:org.eclipse.birt.data Version:2.3.0.v20071228-1005 Error Code:data.engine.CompCol.FailRetrieveValueComputedColumn Error Message:Fail to compute value for computed column "AAA". Can not convert the value of [B@1a9efcd to Blob type.
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
{
			return toString( (Number) source, locale );
		}
		else 
		{
			String str = "";
			if ( source instanceof byte[] )
			{
				final int strLength = 8;
				byte[] sourceValue = (byte[]) source;
				int length = Math.min( sourceValue.length, strLength );
				for ( int i = 0; i < length; i++ )
				{
					str += Integer.toHexString( sourceValue[i] ).toUpperCase( )
							+ " ";
				}
				if ( sourceValue.length > strLength )
				{
					str += "...";
				}
			}
			else
			{
				str = source.toString( );
			}
			return str;
		}
	}
	/**
	 *