morrySnow commented on code in PR #64027:
URL: https://github.com/apache/doris/pull/64027#discussion_r3345841535
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fe/fe-core/src/main/java/org/apache/doris/nereids/rules/analysis/ExpressionAnalyzer.java:
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@@ -297,7 +297,15 @@ public Expression visitElementAt(ElementAt elementAt,
ExpressionRewriteContext c
Expression right = elementAt.right().accept(this, context);
elementAt = (ElementAt) elementAt.withChildren(left, right);
Expression coerced = TypeCoercionUtils.processBoundFunction(elementAt);
- if (isEnableVariantSchemaAutoCast(context)) {
+ // element_at over a STRUCT must be rewritten into struct_element. The
subscript form `s['f']`
+ // / `s[idx]` is parsed directly into an ElementAt (not an
UnboundFunction), so it never reaches
+ // visitUnboundFunction where the named call `element_at(s,'f')` gets
this same rewrite. Apply the
+ // shared ElementAt.rewriteWhenAnalyze() here so both syntaxes behave
identically; otherwise the
+ // BE receives element_at(struct) and aborts.
+ if (coerced instanceof RewriteWhenAnalyze) {
Review Comment:
maybe we need merge element_at and struct_element into one function
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