Do not inline tail, small pages if inilining is disabled

Author: wendigo

core/trino-main/src/main/java/io/trino/operator/OutputSpoolingOperatorFactory.java

@@ -62,6 +62,7 @@
 import static io.trino.server.protocol.spooling.SpooledMetadataBlockSerde.serialize;
 import static io.trino.server.protocol.spooling.SpoolingSessionProperties.getInitialSegmentSize;
 import static io.trino.server.protocol.spooling.SpoolingSessionProperties.getMaxSegmentSize;
+import static io.trino.server.protocol.spooling.SpoolingSessionProperties.isInliningEnabled;
 import static java.util.Objects.requireNonNull;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.concurrent.TimeUnit.NANOSECONDS;
@@ -153,6 +154,7 @@ static class OutputSpoolingOperator
         private final AtomicLong inlinedSegmentsCount = new AtomicLong();
         private final long maxSegmentSize;
         private final long minSegmentSize;
+        private final boolean inliningEnabled;
 
         enum State
         {
@@ -187,6 +189,7 @@ public OutputSpoolingOperator(OperatorContext operatorContext, QueryDataEncoder
 
             this.minSegmentSize = getInitialSegmentSize(operatorContext.getSession()).toBytes();
             this.maxSegmentSize = getMaxSegmentSize(operatorContext.getSession()).toBytes();
+            this.inliningEnabled = isInliningEnabled(operatorContext.getSession());
             this.aggregatedMemoryContext = operatorContext.newAggregateUserMemoryContext();
             this.queryDataEncoder = requireNonNull(queryDataEncoder, "queryDataEncoder is null");
             this.spoolingManager = requireNonNull(spoolingManager, "spoolingManager is null");
@@ -282,7 +285,7 @@ private Page spoolOrInline(boolean lastPage)
                 long rows = reduce(partition, Page::getPositionCount);
                 long size = reduce(partition, Page::getSizeInBytes);
 
-                if (lastPage && isLastPartition && size < SPOOLING_THRESHOLD) {
+                if (lastPage && inliningEnabled && isLastPartition && size < SPOOLING_THRESHOLD) {
                     // If the last partition is small enough, inline it to save the overhead of spooling
                     spooledMetadataBuilder.addAll(inline(partition));
                     continue;