better cli arg name

Author: yulong-db

cmd/thanos/query.go

@@ -245,7 +245,7 @@ func registerQuery(app *extkingpin.App) {
 	enforceTenancy := cmd.Flag("query.enforce-tenancy", "Enforce tenancy on Query APIs. Responses are returned only if the label value of the configured tenant-label-name and the value of the tenant header matches.").Default("false").Bool()
 	tenantLabel := cmd.Flag("query.tenant-label-name", "Label name to use when enforcing tenancy (if --query.enforce-tenancy is enabled).").Default(tenancy.DefaultTenantLabel).String()
 
-	rewriteAggregationLabelTo := cmd.Flag("query.rewrite-aggregation-label-to", "Rewrite the aggregation label to the provided value for metric with name ending in standard aggregation suffixes.").Default("").String()
+	rewriteAggregationLabelTo := cmd.Flag("query.aggregation-label-value-override", "The value override for __rollup__ label for aggregated metrics. If set to x, all queries on aggregated metrics will have a __rollup__=x matcher. Leave empty to disable this behavior. Default is empty.").Default("").String()
 
 	var storeRateLimits store.SeriesSelectLimits
 	storeRateLimits.RegisterFlags(cmd)