Github user chunhui-shi commented on a diff in the pull request:
https://github.com/apache/drill/pull/594#discussion_r81617585
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/vector/complex/fn/JsonReader.java
---
@@ -131,14 +139,33 @@ public void ensureAtLeastOneField(ComplexWriter
writer) {
PathSegment fieldPath = fieldPathList.get(j);
if (emptyStatus.get(j)) {
if (allTextMode) {
- fieldWriter.varChar(fieldPath.getNameSegment().getPath());
+ if (checkNullFields(fieldPathList)) {
+ for (String fieldName : nullableFields) {
+ fieldWriter.varChar(fieldName);
+ }
+ } else {
+ fieldWriter.varChar(fieldPath.getNameSegment().getPath());
+ }
} else {
- fieldWriter.integer(fieldPath.getNameSegment().getPath());
+ if (checkNullFields(fieldPathList)) {
--- End diff --
Your fix is not targeted to change behavior under non-allTextMode, right?
If this is the case, is this change in "else" needed? If you want to fix
behavior under non-allTextMode as well, then you should also add unit test for
this mode as well.
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