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
String str = ( (Number) source ).toString( );
			try
			{
				return new BigDecimal( str );
			}
			catch ( NumberFormatException e )
			{
				throw new CoreException( 
						ResourceConstants.CONVERT_FAILS,
						new Object[]{
								str, "BigDecimal"
						} );
			}
		}
		else if ( source instanceof Boolean )
		{
			if ( true == ( (Boolean) source ).booleanValue( ) )
				return new BigDecimal( 1d );
			return new BigDecimal( 0d );
		}
		else if ( source instanceof Date )
		{
			long longValue = ( (Date) source ).getTime( );
			return new BigDecimal( longValue );
		}
		else if ( source instanceof String )
		{
			try
			{