morrySnow commented on code in PR #11246:
URL: https://github.com/apache/doris/pull/11246#discussion_r930692117
##########
fe/fe-core/src/main/java/org/apache/doris/analysis/AggregateInfo.java:
##########
@@ -283,6 +285,12 @@ public static boolean
estimateIfContainsMultiDistinct(List<FunctionCallExpr> dis
hasMultiDistinct = true;
}
}
+
+ // for vectorized execution, we force it to using hash set to execution
+ if (!hasMultiDistinct && distinctAggExprs.size() == 1 &&
distinctAggExprs.get(0).getFnParams().isDistinct()
+ && VectorizedUtil.isVectorized() &&
ConnectContext.get().getSessionVariable().enableSingleDistinctColumnOpt()) {
+ hasMultiDistinct = true;
Review Comment:
nit: if we use 2 stage aggregate for one distinct aggregate, maybe we should
change function name and variable name to get a better description of what's
actually being done
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