mayankshriv commented on a change in pull request #4535: Implement DISTINCT
clause
URL: https://github.com/apache/incubator-pinot/pull/4535#discussion_r315312401
##########
File path:
pinot-common/src/main/java/org/apache/pinot/pql/parsers/pql2/ast/FunctionCallAstNode.java
##########
@@ -82,10 +85,30 @@ public AggregationInfo buildAggregationInfo() {
expression = "*";
} else {
List<? extends AstNode> children = getChildren();
- if (children == null || children.size() != 1) {
- throw new Pql2CompilationException("Aggregation function expects exact
1 argument");
+ if (children == null) {
+ throw new Pql2CompilationException("Aggregation function expects
non-null argument");
+ }
+ if (!_name.equalsIgnoreCase("distinct")) {
Review comment:
Why do we need to special-case `distinct`? If this is due to an underlying
problem/limitation, let's see if we can address that instead of working around
it here.
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