Jackie-Jiang commented on code in PR #10042:
URL: https://github.com/apache/pinot/pull/10042#discussion_r1061857493
##########
pinot-broker/src/main/java/org/apache/pinot/broker/requesthandler/SingleConnectionBrokerRequestHandler.java:
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@@ -106,13 +106,36 @@ protected BrokerResponseNative processBrokerRequest(long
requestId, BrokerReques
serverBrokerRequest.getPinotQuery().putToQueryOptions(CommonConstants.Broker.Request.TRACE,
"true");
}
+ // broker short-circuit for `select` and `select distinct` queries without
`ORDER BY`
+ boolean orderByPresent = false;
Review Comment:
Checking if select is present is not enough to determine if the query is
select/select distinct. We can use
`!QueryContextUtils.isAggregationQuery(query) && query.getOrderByExpressions()
== null`, but we will need to first construct the `QueryContext` from the
`PinotQuery`. This conversion is not very cheap, so we should try to do this
conversion only once in the request handler, and pass it to the reducer
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