liquibase-core/src/main/java/liquibase/executor/jvm/ColumnMapRowMapper.java
protected Object getColumnValue(ResultSet rs, int index) throws SQLException {
        return JdbcUtils.getResultSetValue(rs, index);
    }
protected Object getColumnValue(ResultSet rs, int index) throws SQLException {
        return JdbcUtils.getResultSetValue(rs, index);
    }
Retrieve a JDBC object value for the specified column.
<p>The default implementation uses the <code>getObject</code> method.
Additionally, this implementation includes a "hack" to get around Oracle
returning a non standard object for their TIMESTAMP datatype.

@param rs    is the ResultSet holding the data
@param index is the column index
@return the Object returned