englefly commented on code in PR #69028:
URL: https://github.com/apache/doris/pull/69028#discussion_r4312279362
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fe/fe-core/src/main/java/org/apache/doris/statistics/analysis/TableStatsMeta.java:
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@@ -194,6 +273,21 @@ public void update(AnalysisInfo analyzedJob, TableIf
tableIf) {
if (tableIf != null) {
if (tableIf instanceof OlapTable) {
OlapTable olapTable = (OlapTable) tableIf;
+ // The collected row counts published below already include
the rows which had been loaded when
+ // the job was built, remember how many they were, they are
not delta rows. The baseline may
+ // only advance together with the collected base index row
count, an analysis of another index
+ // (a materialized view) doesn't touch it.
+ // NOTICE: the baseline is published before the collected
counts. They are both read without
+ // the table lock by the planner, and a reader which pairs the
collected count of this analysis
+ // with the baseline of the previous one counts the rows
loaded since that previous analysis
+ // twice.
+ if
(analyzedJob.indexesRowCount.containsKey(olapTable.getBaseIndexId())) {
+ // A row count supplied by the user replaces the collected
one and describes the table as
+ // of now, so the rows loaded so far are part of it and
the baseline has to move to the
+ // current value. Keeping the older baseline would count
those rows again once DROP STATS
+ // clears userInjected.
+ updatedRowsBase.set(analyzedJob.userInject ?
updatedRows.get() : analyzedJob.updateRows);
Review Comment:
这是老代码固有问题, 设计使用deltaRow时就已知有这个缺陷. 提了新issue 跟踪
https://github.com/apache/doris/issues/69280
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