rhodo commented on code in PR #17817:
URL: https://github.com/apache/pinot/pull/17817#discussion_r2891994785
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pinot-core/src/main/java/org/apache/pinot/core/common/DataFetcher.java:
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@@ -321,9 +324,11 @@ private class ColumnValueReader implements AutoCloseable {
}
private ForwardIndexReaderContext getReaderContext() {
- // Create reader context lazily to reduce the duration of existence
if (!_readerContextCreated) {
_readerContext = _reader.createContext();
Review Comment:
> There are a lot of places where reader.createContext() is invoked, e.g. in
ScanDocIdIterator. Do we need to also change that?
I did take a look at callsites broadly in the repo. Many places where
`_reader.createContext()` is invoked are segment-level operations without query
options (index rebuilding, segment loading, etc.), (though ScanDocIdIterator is
indeed a query-path call site), so for now I left it on an on-demand basis:
e.g. if later we need query options in ScanDocIdIterator we can propagate there
then.
Yeah I think having both `createContext()` and `createContext(queryOptions)`
with a default fallback works too, no-arg `createContext()` are for the
segment-level call sites. Happy to do this in a follow-up PR if you think
that's a cleaner approach.
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