Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/20850#discussion_r175656666
--- Diff:
sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java
---
@@ -86,11 +88,39 @@ public void grow(int neededSize) {
}
}
- public void reset() {
+ byte[] buffer() {
+ return buffer;
+ }
+
+ int getCursor() {
+ return cursor;
+ }
+
+ void incrementCursor(int val) {
+ cursor += val;
+ }
+
+ int pushCursor() {
--- End diff --
Since one `BufferHolder` is shared by multiple `UnsafeWriter`s, it seems to
be simple to store cursors into `BufferHolders`.
WDYT?
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