marton-bod commented on a change in pull request #3060:
URL: https://github.com/apache/hive/pull/3060#discussion_r816948553
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File path: ql/src/java/org/apache/hadoop/hive/ql/plan/DynamicPartitionCtx.java
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@@ -50,6 +52,14 @@
private String defaultPartName; // default partition name in case of null or
empty value
private int maxPartsPerNode; // maximum dynamic partitions created per
mapper/reducer
private Pattern whiteListPattern;
+ /**
+ * Expressions describing a custom way of sorting the table before write.
Expressions can reference simple
+ * column descriptions or a tree of expressions containing more columns and
UDFs.
+ * Can be useful for custom bucket/hash sorting.
+ * A custom expression should be a lambda that is given the original column
description expressions as per read
+ * schema and returns a single expression. Example for simply just
referencing column 3: cols -> cols.get(3).clone()
+ */
+ private transient List<Function<List<ExprNodeDesc>, ExprNodeDesc>>
customSortExpressions;
Review comment:
Yeah, I was wondering if it's okay if these expressions don't get to the
executors. But I got my answer - Thanks!
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