Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19222#discussion_r171590059
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/vectorized/ArrowColumnVector.java
---
@@ -365,6 +366,7 @@ final Decimal getDecimal(int rowId, int precision, int
scale) {
private final VarCharVector accessor;
private final NullableVarCharHolder stringResult = new
NullableVarCharHolder();
+ private final OffHeapMemoryBlock mb = new OffHeapMemoryBlock(0L, 0L);
--- End diff --
how useful to cache this object?
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