Github user amansinha100 commented on a diff in the pull request:
https://github.com/apache/drill/pull/504#discussion_r64091394
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/project/ProjectRecordBatch.java
---
@@ -146,6 +159,27 @@ protected IterOutcome doWork() {
if (next == IterOutcome.OUT_OF_MEMORY) {
outOfMemory = true;
return next;
+ } else if (next == IterOutcome.NONE) {
+ // since this is first batch and we already got a NONE, need
to set up the schema
+
+ //allocate vv in the allocationVectors.
+ for (final ValueVector v : this.allocationVectors) {
--- End diff --
The doAlloc() was calling incoming.getRecordCount() which would fail for
empty batches, so I did not use it but I can modify doAlloc to take the count
parameter and have everyone call the modified version.
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