kokila-19 commented on code in PR #6439:
URL: https://github.com/apache/hive/pull/6439#discussion_r3109521846
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ql/src/java/org/apache/hadoop/hive/ql/metadata/HiveUtils.java:
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@@ -354,8 +354,20 @@ public Object process(Node nd, Stack<Node> stack,
NodeProcessorCtx procCtx, Obje
throws SemanticException {
UnparseTranslator unparseTranslator =
((QuotedIdExpressionContext)procCtx).getUnparseTranslator();
ASTNode identifier = (ASTNode) nd;
- String id = identifier.getText();
- if (FunctionRegistry.getFunctionInfo(id) != null){
+ /*
+ * Quote identifiers during unparse.
+ *
+ * Only skip quoting for function names.
+ * Always quote column names, even if they match function names.
+ * For example, use `alias`.`date` instead of `alias`.date.
+ */
+ ASTNode parent = (ASTNode) identifier.getParent();
+ if (parent != null
+ && (parent.getType() == HiveParser.TOK_FUNCTION
+ || parent.getType() == HiveParser.TOK_FUNCTIONDI
+ || parent.getType() == HiveParser.TOK_FUNCTIONSTAR)
+ && parent.getChildCount() > 0
+ && parent.getChild(0) == identifier) {
Review Comment:
That’s great. I’ve refactored the code into a helper method to improve
readability.
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