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What is a node in TICKscript?

I'm trying learn TICKscript, but official documentation is messy.

I understand part about variable declaration and expressions in it. But then there are 'nodes'. What's they are?

UPD: I even found their EBNF: https://docs.influxdata.com/kapacitor/v1.5/reference/spec/, and there is no node definition in it.

What is a node in TICKscript?

Solution

  • There is no description of node in syntax of TICKScript, because that is not syntactic concept, but semantic. Node is approximately Function { Chain } in EBNF.

    Here is description of nodes from documentation: https://docs.influxdata.com/kapacitor/v1.5/nodes/

    Nodes represent process invocation units that either take data as a batch or a point-by-point stream, and then alter the data, store the data, or trigger some other activity based on changes in the data (e.g., an alert).

    You could see visualization of nodes, when you run kapacitor show <your_task_name>, and run DOT section of output through dot command. You will get something like:

    Graph representation of TICKScript

    On that picture nodes of graph will correspond to nodes of your TICKscript.