englefly commented on code in PR #65805:
URL: https://github.com/apache/doris/pull/65805#discussion_r3643420535
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fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AccessPathExpressionCollector.java:
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@@ -334,6 +362,29 @@ public Void visitElementAt(ElementAt elementAt,
CollectorContext context) {
Expression fieldName = arguments.get(1);
DataType fieldType = fieldName.getDataType();
if (fieldName.isLiteral() && (fieldType.isIntegerLikeType() ||
fieldType.isStringLikeType())) {
+ // element_at(s, 'field') IS NULL has two-layer null semantics:
Review Comment:
这是BE 适配的内容
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