address comment

Signed-off-by: Lantao Jin <ltjin@amazon.com>

Author: LantaoJin

integ-test/src/test/java/org/opensearch/sql/calcite/remote/CalciteExplainIT.java

@@ -30,7 +30,6 @@
 public class CalciteExplainIT extends ExplainIT {
   @Override
   public void init() throws Exception {
-    GlobalPushdownConfig.enabled = false;
     super.init();
     enableCalcite();
     setQueryBucketSize(1000);

integ-test/src/test/resources/expectedOutput/calcite/explain_complex_sort_expr_pushdown_for_smj_w_max_option.yaml

@@ -17,5 +17,5 @@ calcite:
       EnumerableLimit(fetch=[10000])
         EnumerableMergeJoin(condition=[=($0, $7)], joinType=[left])
           EnumerableCalc(expr#0=[{inputs}], expr#1=['(?<lastname>^[A-Z])'], expr#2=['lastname'], expr#3=[REX_EXTRACT($t0, $t1, $t2)], $f0=[$t3])
-            CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_bank]], PushDownContext=[[PROJECT->[lastname], LIMIT->10000, SORT_EXPR->[REX_EXTRACT($0, '(?<lastname>^[A-Z])', 'lastname') ASCENDING NULLS_LAST]], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":10000,"timeout":"1m","_source":{"includes":["lastname"],"excludes":[]},"sort":[{"_script":{"script":{"source":"{\"langType\":\"calcite\",\"script\":\"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\"}","lang":"opensearch_compounded_script","params":{"MISSING_MAX":true,"utcTimestamp": 0,"SOURCES":[0,2,2],"DIGESTS":["lastname","(?<lastname>^[A-Z])","lastname"]}},"type":"string","order":"asc"}}]}, requestedTotalSize=10000, pageSize=null, startFrom=0)])
+            CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_bank]], PushDownContext=[[PROJECT->[lastname], LIMIT->10000, SORT_EXPR->[REX_EXTRACT($0, '(?<lastname>^[A-Z])', 'lastname') ASCENDING NULLS_LAST]], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":10000,"timeout":"1m","_source":{"includes":["lastname"],"excludes":[]},"sort":[{"_script":{"script":{"source":"{\"langType\":\"calcite\",\"script\":\"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\"}","lang":"opensearch_compounded_script","params":{"MISSING_MAX":true,"utcTimestamp": 0,"SOURCES":[0,2,2],"DIGESTS":["lastname","(?<lastname>^[A-Z])","lastname"]}},"type":"string","order":"asc"}}]}, requestedTotalSize=10000, pageSize=null, startFrom=0)])
           CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_bank]], PushDownContext=[[PROJECT->[account_number, firstname, address, birthdate, gender, city, lastname, balance, employer, state, age, email, male], AGGREGATION->rel#:LogicalAggregate.NONE.[](input=LogicalProject#,group={0},agg#0=LITERAL_AGG(1)), LIMIT->50000, SORT->[6]], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":0,"timeout":"1m","_source":{"includes":["account_number","firstname","address","birthdate","gender","city","lastname","balance","employer","state","age","email","male"],"excludes":[]},"aggregations":{"composite_buckets":{"composite":{"size":1000,"sources":[{"lastname":{"terms":{"field":"lastname","missing_bucket":false,"order":"asc"}}}]},"aggregations":{"$f1":{"top_hits":{"from":0,"size":1,"version":false,"seq_no_primary_term":false,"explain":false,"_source":{"includes":["lastname","account_number","firstname","address","birthdate","gender","city","balance","employer","state","age","email","male"],"excludes":[]},"script_fields":{}}}}}}}, requestedTotalSize=50000, pageSize=null, startFrom=0)])