spark 2.3.1是否可以使用Raw SQL指定水印？我看到了//add a spring util namespace xmlns:util="http://www.springframework.org/schema/util
//schemaLocation http://www.springframework.org/schema/util
<util:map id="headerMap" map-class="java.util.HashMap">
<entry key="Access-Control-Allow-Origin">
<value>*</value>
</entry> ....so on
</util:map>
<bean id="corsFilter" class="CorsFilter">
<property name="header" ref="headerMap"/>
</bean>
public class CorsFilter extends OncePerRequestFilter {
Map<String,String> header;
@Override
protected void doFilterInternal(final HttpServletRequest request,
final HttpServletResponse response,
final FilterChain filterChain) throws ServletException, IOException {
for(Entry<String,String> entry : header.entrySet()){
response.addHeader(entry.getKey(), entry.getValue());
}
filterChain.doFilter(request, response);
}
}
，但是我正在寻找一种可以通过Raw SQl指定水印的方法。也许是UDF？我可以写一个吗？