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 null;
		if ( source instanceof Double )
		{
			return (Double) source;
		}
		else if ( source instanceof Number )
		{
			
			double doubleValue = ( (Number) source ).doubleValue( );
			return new Double( doubleValue );
		}
		else if ( source instanceof Boolean )
		{
			if ( true == ( (Boolean) source ).booleanValue( ) )
				return new Double( 1d );
			return new Double( 0d );
		}
		else if ( source instanceof Date )
		{
			double doubleValue = ( (Date) source ).getTime( );
			return new Double( doubleValue );
		}
		else if ( source instanceof String )
		{
			try
			{
				return Double.valueOf( (String) source );
			}
			catch ( NumberFormatException e )
			{