Github user jacques-n commented on a diff in the pull request:
https://github.com/apache/drill/pull/228#discussion_r43597741
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/aggregate/HashAggTemplate.java
---
@@ -325,10 +325,13 @@ public AggOutcome doWork() {
if (EXTRA_DEBUG_1) {
logger.debug("Received new schema. Batch has {}
records.", incoming.getRecordCount());
}
- newSchema = true;
- this.cleanup();
- // TODO: new schema case needs to be handled appropriately
- return AggOutcome.UPDATE_AGGREGATOR;
+ final BatchSchema newIncomingSchema = incoming.getSchema();
+ if ((! newIncomingSchema.equals(schema)) && schema !=
null) {
--- End diff --
You are quelling a new schema here without correctly reloading vector
references. A schema change means: the schema has changed and/or the vectors
have changed. Your check here isn't enough to guarantee correct behavior. It is
possible that the schema is equal but the vectors changed.
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