Github user jacques-n commented on a diff in the pull request:
https://github.com/apache/drill/pull/207#discussion_r43471006
--- Diff: exec/java-exec/src/main/codegen/templates/MapWriters.java ---
@@ -70,10 +79,15 @@ public MaterializedField getField() {
@Override
public MapWriter map(String name) {
FieldWriter writer = fields.get(name.toLowerCase());
- if(writer == null) {
- int vectorCount = container.size();
- MapVector vector = container.addOrGet(name, MapVector.TYPE,
MapVector.class);
- writer = new SingleMapWriter(vector, this);
+ if(writer == null){
+ int vectorCount=container.size();
+ if(!unionEnabled || unionInternalMap){
+ MapVector
vector=container.addOrGet(name,MapVector.TYPE,MapVector.class);
--- End diff --
let's pull out the common expression between these two cases
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