title: promql rename the result of vector()
body: <p>I am monitoring some metrics for AWS SES.
  In periods where no mails are sent there are no datapoints present (showing as gaps on the graph).
  To fill out the gaps, I am using the following: <br/><br/>
  <strong>aws_ses_send_sum or on() vector(0)</strong><br/>
  <br/> and I am receving the graph visible in the screenshot.</p>
  <p>What I want to achieve now:
  I would like the values with '0' to be also labeled with aws_ses_send_sum{exported_job=&quot;aws_ses&quot;,instance=&quot;localhost:9000&quot;,job=&quot;aws&quot;}
  instead of appearing as: {}.</p>
  <p>I have checked several other questions: <br/>
  <a href="https://stackoverflow.com/questions/51340680/merge-join-two-metrics-in-prometheus-promql?rq=1">Merge/join two metrics in Prometheus/PromQL</a></p>
  <p><a href="https://stackoverflow.com/questions/64366211/how-to-merge-zero-values-vector0-with-metric-values-in-promql">How to merge zero values (vector(0) with metric values in PromQL</a></p>
  <p><a href="https://stackoverflow.com/questions/47406624/how-to-execute-multiple-queries-in-one-call-in-prometheus/47415934#47415934">How to execute multiple queries in one call in Prometheus</a></p>
  <p>checked the querying section in the docs but I am unable to get it right.</p>
  <p>sum() is delivering the graph that I need - but as a result the labels are being removed.</p>
  <p>Could someone please help?</p>
  <p><a href="https://i.stack.imgur.com/INfma.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/INfma.png" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/lvtRx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lvtRx.png" alt="enter image description here" /></a></p>