Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19222#discussion_r177693101
--- Diff:
sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
---
@@ -27,6 +27,9 @@
import org.apache.spark.unsafe.array.ByteArrayMethods;
import org.apache.spark.unsafe.bitset.BitSetMethods;
import org.apache.spark.unsafe.hash.Murmur3_x86_32;
+import org.apache.spark.unsafe.memory.ByteArrayMemoryBlock;
+import org.apache.spark.unsafe.memory.OnHeapMemoryBlock;
+import org.apache.spark.unsafe.memory.MemoryBlock;
--- End diff --
we only need to import MemoryBlock
---
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