fix explain in aqe

sql/core/src/test/resources/sql-tests/inputs/explain-aqe.sql

@@ -1,3 +1,4 @@
 --IMPORT explain.sql
 
 --SET spark.sql.adaptive.enabled=true
+--SET spark.sql.maxMetadataStringLength = 500

sql/core/src/test/resources/sql-tests/results/explain-aqe.sql.out

@@ -42,6 +42,48 @@ struct<key:string,value:string>
 spark.sql.codegen.wholeStage	true
 
 
+-- !query
+EXPLAIN EXTENDED
+  SELECT sum(distinct val)
+  FROM explain_temp1
+-- !query schema
+struct<plan:string>
+-- !query output
+== Parsed Logical Plan ==
+'Project [unresolvedalias('sum(distinct 'val), None)]
++- 'UnresolvedRelation [explain_temp1], []
+
+== Analyzed Logical Plan ==
+sum(DISTINCT val): bigint
+Aggregate [sum(distinct cast(val#x as bigint)) AS sum(DISTINCT val)#xL]
++- SubqueryAlias spark_catalog.default.explain_temp1
+   +- Relation[key#x,val#x] parquet
+
+== Optimized Logical Plan ==
+Aggregate [sum(distinct cast(val#x as bigint)) AS sum(DISTINCT val)#xL]
++- Project [val#x]
+   +- Relation[key#x,val#x] parquet
+
+== Physical Plan ==
+AdaptiveSparkPlan isFinalPlan=false
++- == Current Plan ==
+   HashAggregate(keys=[], functions=[sum(distinct cast(val#x as bigint)#xL)], output=[sum(DISTINCT val)#xL])
+   +- Exchange SinglePartition, true, [id=#x]
+      +- HashAggregate(keys=[], functions=[partial_sum(distinct cast(val#x as bigint)#xL)], output=[sum#xL])
+         +- HashAggregate(keys=[cast(val#x as bigint)#xL], functions=[], output=[cast(val#x as bigint)#xL])
+            +- Exchange hashpartitioning(cast(val#x as bigint)#xL, 4), true, [id=#x]
+               +- HashAggregate(keys=[cast(val#x as bigint) AS cast(val#x as bigint)#xL], functions=[], output=[cast(val#x as bigint)#xL])
+                  +- FileScan parquet default.explain_temp1[val#x] Batched: true, DataFilters: [], Format: Parquet, Location [not included in comparison]/{warehouse_dir}/explain_temp1], PartitionFilters: [], PushedFilters: [], ReadSchema: struct<val:int>
++- == Initial Plan ==
+   HashAggregate(keys=[], functions=[sum(distinct cast(val#x as bigint)#xL)], output=[sum(DISTINCT val)#xL])
+   +- Exchange SinglePartition, true, [id=#x]
+      +- HashAggregate(keys=[], functions=[partial_sum(distinct cast(val#x as bigint)#xL)], output=[sum#xL])
+         +- HashAggregate(keys=[cast(val#x as bigint)#xL], functions=[], output=[cast(val#x as bigint)#xL])
+            +- Exchange hashpartitioning(cast(val#x as bigint)#xL, 4), true, [id=#x]
+               +- HashAggregate(keys=[cast(val#x as bigint) AS cast(val#x as bigint)#xL], functions=[], output=[cast(val#x as bigint)#xL])
+                  +- FileScan parquet default.explain_temp1[val#x] Batched: true, DataFilters: [], Format: Parquet, Location [not included in comparison]/{warehouse_dir}/explain_temp1], PartitionFilters: [], PushedFilters: [], ReadSchema: struct<val:int>
+
+
 -- !query
 EXPLAIN FORMATTED
   SELECT key, max(val)