mayankshriv commented on a change in pull request #6066:
URL: https://github.com/apache/incubator-pinot/pull/6066#discussion_r522438725
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File path:
pinot-broker/src/main/java/org/apache/pinot/broker/requesthandler/BaseBrokerRequestHandler.java
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@@ -984,32 +984,57 @@ private void fixColumnName(String rawTableName,
TransformExpressionTree expressi
private void fixColumnName(String rawTableName, Expression expression,
@Nullable Map<String, String> columnNameMap) {
ExpressionType expressionType = expression.getType();
if (expressionType == ExpressionType.IDENTIFIER) {
- Identifier identifier = expression.getIdentifier();
- identifier.setName(getActualColumnName(rawTableName,
identifier.getName(), columnNameMap));
+ if (!isStarIdentifier(expression)) {
Review comment:
This special casing just for emitting a metric does not seem right.
Perhaps it might be more straight forward to do it on the server side as
follows:
- For each segment, if the segment gets pruned due to missing column, we
return that to broker as part of metadata (or executionstatistics). May be we
can emit a metric there.
- Broker can decide to act on what to do (metric or metadata in response, or
both) if it sees server responses where segments where pruned due to missing
column.
cc: @mcvsubbu
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