Document that some QueryStatistics field are not backward compatible

trinodb · Feb 4, 2019 · 552cf2a · 552cf2a
1 parent 1a867a6
commit 552cf2a
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/presto-spi/src/main/java/io/prestosql/spi/eventlistener/QueryStatistics.java b/presto-spi/src/main/java/io/prestosql/spi/eventlistener/QueryStatistics.java
@@ -51,8 +51,15 @@ public class QueryStatistics
 
     private final List<StageCpuDistribution> cpuTimeDistribution;
 
+    /**
+     * Operator summaries serialized to JSON. Serialization format and structure
+     * can change without preserving backward compatibility.
+     */
     private final List<String> operatorSummaries;
-
+    /**
+     * Plan node stats and costs summaries serialized to JSON. Serialization format and structure
+     * can change without preserving backward compatibility.
+     */
     private final Optional<String> planNodeStatsAndCosts;
 
     public QueryStatistics(