paul-rogers commented on a change in pull request #2072:
URL: https://github.com/apache/drill/pull/2072#discussion_r419628787
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/metadata/MetadataControllerBatch.java
##########
@@ -127,113 +126,93 @@ protected MetadataControllerBatch(MetadataControllerPOP
popConfig,
? null
: popConfig.getContext().metadataToHandle().stream()
.collect(Collectors.toMap(MetadataInfo::identifier,
Function.identity()));
- this.metadataUnits = new ArrayList<>();
- this.statisticsCollector = new StatisticsCollectorImpl();
this.columnNamesOptions = new ColumnNamesOptions(context.getOptions());
}
- protected boolean setupNewSchema() {
- container.clear();
- container.addOrGet(MetastoreAnalyzeConstants.OK_FIELD_NAME,
Types.required(TypeProtos.MinorType.BIT), null);
- container.addOrGet(MetastoreAnalyzeConstants.SUMMARY_FIELD_NAME,
Types.required(TypeProtos.MinorType.VARCHAR), null);
- container.buildSchema(BatchSchema.SelectionVectorMode.NONE);
- container.setEmpty();
- return true;
- }
-
@Override
public IterOutcome innerNext() {
- IterOutcome outcome;
- boolean finishedLeft;
- if (finished) {
- return IterOutcome.NONE;
- }
+ while (state != State.FINISHED) {
+ switch (state) {
+ case RIGHT: {
- if (!finishedRight) {
- outcome = handleRightIncoming();
- if (outcome != null) {
- return outcome;
+ // Can only return NOT_YET
+ IterOutcome outcome = handleRightIncoming();
+ if (outcome != null) {
+ return outcome;
+ }
+ break;
+ }
+ case LEFT: {
+
+ // Can only return NOT_YET
+ IterOutcome outcome = handleLeftIncoming();
+ if (outcome != null) {
+ return outcome;
+ }
+ break;
+ }
+ case WRITE:
+ writeToMetastore();
+ createSummary();
+ state = State.FINISHED;
+ return IterOutcome.OK_NEW_SCHEMA;
+
+ case FINISHED:
+ break;
+
+ default:
+ throw new IllegalStateException(state.name());
}
}
+ return IterOutcome.NONE;
+ }
+ private IterOutcome handleRightIncoming() {
outer:
- while (true) {
- outcome = next(0, left);
+ for (;;) {
Review comment:
Thanks for the explanation! I've updated DRILL-7352, our roll-up of
coding standards, with the `while (true)` preference.
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