Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20636#discussion_r194526656
--- Diff:
sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java
---
@@ -61,6 +61,10 @@
* Grows the buffer by at least neededSize and points the row to the
buffer.
*/
void grow(int neededSize) {
+ if (neededSize < 0) {
--- End diff --
I think we can use `assert` here. When `neededSize` is negative, there must
be an overflow.
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