szlta commented on a change in pull request #3060:
URL: https://github.com/apache/hive/pull/3060#discussion_r816946090
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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:
The job has the dpCtx serialized, and for some reason kryo is throwing
exceptions for lambdas on the executor side.
The expressions here are only needed in HS2 during query planning so I just
prevent them from going to executors in the first place.
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