Bug 151535 Parameters are invisable in Joint Dataset
Trying to use "Joint Dataset" combined with parameters within underlaying Data-Sets (neccessary to achive a filtering where clause for a DateTime Field) Parameter editing ( e.g. in Chart designer) do not show the entire parameter. As specified it should show and let to edit a combination of both underlaying datasets' parameters.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedJointDataSourceQuery.java
assert ( size == 0 );
			}
		}
		return size;
	}
	/**
	 * Check whether a column is a temp column according to column name.
	 * @param columnName
	 * @return
	 */
	private boolean isTempColumn( String columnName )
	{
		if ( columnName.length( ) < 7 )
		{
			return false;
		}
		if ( !columnName.matches( TEMP_COLUMN_STRING ) )
		{
			return false;
		}
		return true;
	}
	/**
	 * Populate the JointResultMetadata.
	 * 
	 * @param left
	 * @param leftPrefix
	 * @param right
	 * @param rightPrefix
	 * @return