nizarhejazi commented on code in PR #9086:
URL: https://github.com/apache/pinot/pull/9086#discussion_r934033762
##########
pinot-common/src/main/java/org/apache/pinot/common/request/context/RequestContextUtils.java:
##########
@@ -81,11 +81,6 @@ public static ExpressionContext getExpression(Expression
thriftExpression) {
*/
public static FunctionContext getFunction(Function thriftFunction) {
String functionName = thriftFunction.getOperator();
- if
(functionName.equalsIgnoreCase(AggregationFunctionType.COUNT.getName())) {
- // NOTE: COUNT always take one single argument "*"
- return new FunctionContext(FunctionContext.Type.AGGREGATION,
AggregationFunctionType.COUNT.getName(),
- new
ArrayList<>(Collections.singletonList(ExpressionContext.forIdentifier("*"))));
- }
Review Comment:
@walterddr In order to handle nulls in count function, we need to be able to
accept two syntaxes: `count(col)` and `count(*)`. We don't handle nulls when
the input is `count(*)` but we handle it for `count(col)` by not counting null
values in `col`.
I removed these lines and updated all calls of `CountAggregationFunction`
constructor to send the count expression including the constructor calls in
pinot-query-runtime (check `AggregateOperator.java` and compare to
`AggregationFunctionFactory.java`). Only pinot-query-runtime still don't pass
the expression and sent count().
cc: @Jackie-Jiang
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