morrySnow commented on code in PR #33630:
URL: https://github.com/apache/doris/pull/33630#discussion_r1565117424
##########
fe/fe-core/src/main/java/org/apache/doris/analysis/StmtRewriter.java:
##########
@@ -1365,4 +1370,116 @@ public static boolean rewriteByPolicy(StatementBase
statementBase, Analyzer anal
}
return reAnalyze;
}
+
+ /**
+ *
+ * @param ref the SlotRef to rewrite
+ * @param selectList new selectList for selectStmt
+ * @param groupByExprs group by Exprs for selectStmt
+ * @return true if ref can be rewritten
+ */
+ private static boolean rewriteSelectList(SlotRef ref, SelectList
selectList, ArrayList<Expr> groupByExprs,
+ ArrayList<FunctionCallExpr>
aggExprs) {
+ Column column = ref.getColumn();
+ if (column.isKey()) {
+ selectList.addItem(new SelectListItem(ref, null));
+ groupByExprs.add(ref);
+ return true;
+ } else {
+ AggregateType aggregateType = column.getAggregationType();
+ if (aggregateType != AggregateType.SUM && aggregateType !=
AggregateType.MAX
+ && aggregateType != AggregateType.MIN) {
+ return false;
+ } else {
+ FunctionName funcName = new
FunctionName(aggregateType.toString().toLowerCase());
+ List<Expr> arrayList = Lists.newArrayList(ref);
+ FunctionCallExpr func = new FunctionCallExpr(funcName, new
FunctionParams(false, arrayList));
+ selectList.addItem(new SelectListItem(func, null));
+ aggExprs.add(func);
+ return true;
+ }
+ }
+ }
+
+ public static boolean rewriteForRandomDistribution(StatementBase
statementBase, Analyzer analyzer)
Review Comment:
add comment to explain this function
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