xiangfu0 commented on a change in pull request #8158:
URL: https://github.com/apache/pinot/pull/8158#discussion_r805200267
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File path:
pinot-common/src/main/java/org/apache/pinot/sql/parsers/CalciteSqlParser.java
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@@ -710,14 +711,18 @@ private static Expression
compileFunctionExpression(SqlBasicCall functionNode) {
compilePathExpression(functionName, functionNode, path);
return RequestUtils.getIdentifierExpression(path.toString());
}
+ if ((functionNode.getFunctionQuantifier() != null) &&
("DISTINCT".equals(
+ functionNode.getFunctionQuantifier().toString()))) {
+ functionName = "DISTINCTCOUNT";
Review comment:
I think the issue is that the old behavior has `functionKind == COUNT`,
so it goes to line 698.
The new parser makes `functionKind = OTHER_FUNCTION`.
The difference here is pinot internal has the implementation of DISTINTCOUNT
as a single function, SUM(DISTINCT) cannot be treated as a single function and
hence not supported.
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