Eu acho que entendi. Pode ser resolvido usando groupByNode
.
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#A
groupByNode(group(#B, #C), 0, 'asPercent')
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#B
aliasSub(groupByNode(stats.counters.app.view.isbn.fetch.found.yes.*.rate, 8, "sumSeries"), "^(.*)$", ".yes")
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#C
aliasSub(groupByNode(stats.counters.app.view.isbn.fetch.found.no.*.rate, 8, "sumSeries"), "^(.*)$", ".no")