mrproliu commented on code in PR #11194: URL: https://github.com/apache/skywalking/pull/11194#discussion_r1287857880
########## docs/en/api/metrics-query-expression.md: ########## @@ -206,3 +206,22 @@ aggregate_labels(total_commands_rate, SUM) ### Result Type The ExpressionResultType of the aggregateLabels operation is TIME_SERIES_VALUES. + +## ViewAsSequence Operation +ViewAsSequence operation searches for expressions in the given list from start to end and returns the expression that not empty. + +Expression: +```text +view_as_seq([<expression_1>, <expression_2>, ...]) +``` + +For example: +if the first expression value is empty but the second one not empty, it would return the result from the second expression. +The following example would return the content of the **service_sla** metric. + +```text +view_as_seq(not_existing, service_cpm) Review Comment: Yes, It's a typo, and has been fixed. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
