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Transformations - Add field from calculation: add Logic operators to Binary operation

grafana/grafana#115702·76840·TypeScript·271 天未动·0 条评论·上游最近活跃 ·池内状态:可认领
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<!-- Please only use this template for submitting feature requests --> **Why is this needed**: The “Add field from calculation” transformation supports only mathematical functions, but in many cases it is necessary to create a new field using basic logical operators. For example, creating a field C = 1 if Field A > Field B, and so on. **What would you like to be added**: Add logic operators to "Add field from calculation" transformation. It could be just extend binary operators with < > == and != operators. The closest example is the IF function in MySQL, which many people currently use to implement basic logic at the DataSource layer. **Who is this feature for?** Most users rely on a workaround by moving any logic to the data source layer, for example to MySQL or Infinity. However, when working with a Prometheus data source — or especially with mixed queries from different data sources such as Prometheus and SQL together — this quickly becomes painful and, in some cases, even impossible. And all that you have left for data processing and aggregation are "transformations". For example, I would like to color table cell A based on the value of table cell B. This is a simple and commonly requested operation: you need to display some data in one cell, but highlight it based on an additional external condition. The internet has been full of questions about how to do this for more than five years, yet there is still no clear or proper solution. “Config from query results” could solve this problem. However, if you cannot create an intermediate field based on a logical condition, then “Config from query results” becomes useless for this use case. Without logical operations, we are forced to use such a terrible mathematical expression to implement a simple logical function A > B. flag = max( min( (A - B) / abs(A - B), 1 ), 0 )
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