morningman commented on code in PR #28635:
URL: https://github.com/apache/doris/pull/28635#discussion_r1432358250


##########
fe/fe-core/src/main/java/org/apache/doris/statistics/StatisticsRepository.java:
##########
@@ -192,10 +193,34 @@ public static void dropStatistics(long tblId, Set<String> 
colNames) throws DdlEx
     public static void dropStatisticsByColName(long tblId, Set<String> 
colNames, String statsTblName)
             throws DdlException {
         Map<String, String> params = new HashMap<>();
-        String right = colNames.stream().map(s -> "'" + s + 
"'").collect(Collectors.joining(","));
-        String inPredicate = String.format("tbl_id = %s AND %s IN (%s)", 
tblId, "col_id", right);
         params.put("tblName", statsTblName);
-        params.put("condition", inPredicate);
+        Iterator<String> iterator = colNames.iterator();
+        int columnCount = 0;
+        StringBuilder inPredicate = new StringBuilder();
+        while (iterator.hasNext()) {
+            inPredicate.append("'");
+            inPredicate.append(iterator.next());
+            inPredicate.append("'");
+            inPredicate.append(",");
+            columnCount++;
+            if (columnCount == Config.max_allowed_in_element_num_of_delete) {

Review Comment:
   if `max_allowed_in_element_num_of_delete` is set to `0`, the check will 
never succeed.
   You can modify it in next PR



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