Fix NullFilter getDimensionRangeSet. #15500
Merged
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It wasn't checking the column name, so it would return a domain regardless of the input column. This means that null filters on datasources with range partitioning could lead to excessive pruning of segments, and therefore missing results.
The null filter was introduced in #14542, meaning this query correctness bug has existed since 27.0. It will likely be more commonly hit in 28.0 because the null handling mode is on by default (and therefore this filter is generated by SQL planning by default) since #14792.