Bug 151788 Provide additional ODA runtime hints to the ODA consumer
Some ODA runtime drivers are not able to obtain sufficient metadata on its parameters and result set column. Such metadata is thus needed to be collected at design time, for use by the BIRT ODA consumer. For example, the native data type of a parameter and column is often needed, but is not currently available to the odaconsumer in the Data Engine API runtime hints. This enhancement involves adding the native data type to the Data Engine API, and passing through its value from the ROM Model in report design to the ODA consumer.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/odaconsumer/ParameterMetaData.java
* 			or unknown.
	 */
	public int getScale()
	{
		return m_scale;
	}
	
	/**
	 * Returns the maximum number of decimal digits for this parameter.
	 * @return	the precision of the parameter, or -1 if the precision is 
	 * 			unspecified or unknown.
	 */
	public int getPrecision()
	{
		return m_precision;
	}
	
	/**
	 * Returns whether null values are allowed for this parameter.
	 * @return	Boolean.TRUE if null is allowed for this parameter. Boolean.FALSE 
	 * 			if null is not allowed for this parameter. Null if it is unspecified 
	 * 			or unknown whether null is allowed for this parameter. The default 
	 * 			value is null.
	 */
	public Boolean isNullable()
	{
		return m_isNullable;
	}
}