morrySnow commented on code in PR #21068:
URL: https://github.com/apache/doris/pull/21068#discussion_r1236565281
##########
fe/fe-core/src/main/java/org/apache/doris/planner/SingleNodePlanner.java:
##########
@@ -282,6 +282,8 @@ private PlanNode createQueryPlan(QueryStmt stmt, Analyzer
analyzer, long default
}
}
+ long sqlSelectLimit =
analyzer.getContext().getSessionVariable().sqlSelectLimit;
Review Comment:
createQueryPlan is called recursively, should make sqlSelectLimit as a
parameter of this function just like defaultOrderByLimit
##########
fe/fe-core/src/main/java/org/apache/doris/planner/SingleNodePlanner.java:
##########
@@ -295,7 +297,8 @@ private PlanNode createQueryPlan(QueryStmt stmt, Analyzer
analyzer, long default
((SortNode) root).setDefaultLimit(limit == -1);
((SortNode) root).setOffset(stmt.getOffset());
if (useTopN) {
- root.setLimit(limit != -1 ? limit : newDefaultOrderByLimit);
+ // if limit != -1, it means limit clause exists, we get the
minimum.
+ root.setLimit(limit != -1 ? limit :
Math.min(newDefaultOrderByLimit, sqlSelectLimit));
Review Comment:
sqlSelectLimit could small than 0, in this case, sqlSelectLimit should not
be set to limit
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