MaxNevermind commented on code in PR #1335:
URL: https://github.com/apache/parquet-java/pull/1335#discussion_r1704892705
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parquet-hadoop/src/main/java/org/apache/parquet/hadoop/rewrite/RewriteOptions.java:
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@@ -350,6 +436,28 @@ public Builder indexCacheStrategy(IndexCache.CacheStrategy
cacheStrategy) {
return this;
}
+ /**
+ * Set a flag weather columns from join files need to overwrite columns
from input files.
Review Comment:
> What is the overwrite strategy? If the input file joins file A and joins
file B. All those files have a column: col, which has the highest priority?
All inputFilesToJoin file are currently expected to have the same schema.
Additionally there is a flag `overwriteInputWithJoinColumns` which if set to
true will prioritize columns from inputFilesToJoin instead of inputFiles, it
is `false` by default so be default inputFiles columns will be preserved.
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