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The following commit(s) were added to refs/heads/master by this push:
     new 8cb33d7  Only print last query details while debuging (#3094)
8cb33d7 is described below

commit 8cb33d7d43a1d47f7c47d4534b49b0cb88d0f53f
Author: Jackie Tien <[email protected]>
AuthorDate: Thu Apr 29 14:03:36 2021 +0800

    Only print last query details while debuging (#3094)
---
 .../antlr4/org/apache/iotdb/db/qp/sql/SqlBase.g4   |   6 +-
 .../apache/iotdb/db/qp/sql/IoTDBSqlVisitor.java    | 141 ++++++++++++++++++++-
 .../iotdb/db/query/executor/LastQueryExecutor.java |  41 ++++--
 3 files changed, 171 insertions(+), 17 deletions(-)

diff --git a/antlr/src/main/antlr4/org/apache/iotdb/db/qp/sql/SqlBase.g4 
b/antlr/src/main/antlr4/org/apache/iotdb/db/qp/sql/SqlBase.g4
index c753069..dd629dd 100644
--- a/antlr/src/main/antlr4/org/apache/iotdb/db/qp/sql/SqlBase.g4
+++ b/antlr/src/main/antlr4/org/apache/iotdb/db/qp/sql/SqlBase.g4
@@ -20,7 +20,7 @@
 grammar SqlBase;
 
 singleStatement
-    : EXPLAIN? statement (';')? EOF
+    : DEBUG? statement (';')? EOF
     ;
 
 /*
@@ -1304,6 +1304,10 @@ EXPLAIN
     : E X P L A I N
     ;
 
+DEBUG
+    : D E B U G
+    ;
+
 NULL
     : N U L L
     ;
diff --git 
a/server/src/main/java/org/apache/iotdb/db/qp/sql/IoTDBSqlVisitor.java 
b/server/src/main/java/org/apache/iotdb/db/qp/sql/IoTDBSqlVisitor.java
index 9003016..3888c74 100644
--- a/server/src/main/java/org/apache/iotdb/db/qp/sql/IoTDBSqlVisitor.java
+++ b/server/src/main/java/org/apache/iotdb/db/qp/sql/IoTDBSqlVisitor.java
@@ -78,7 +78,144 @@ import 
org.apache.iotdb.db.qp.logical.sys.StartTriggerOperator;
 import org.apache.iotdb.db.qp.logical.sys.StopTriggerOperator;
 import org.apache.iotdb.db.qp.logical.sys.TracingOperator;
 import org.apache.iotdb.db.qp.physical.crud.GroupByTimePlan;
-import org.apache.iotdb.db.qp.sql.SqlBaseParser.*;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AggregationCallContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AggregationElementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AliasClauseContext;
+import 
org.apache.iotdb.db.qp.sql.SqlBaseParser.AlignByDeviceClauseOrDisableAlignInSpecialLimitContext;
+import 
org.apache.iotdb.db.qp.sql.SqlBaseParser.AlignByDeviceStatementOrDisableAlignInSpecialClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AlterClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AlterTimeseriesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AlterUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AndExpressionContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AsClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AsElementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AttributeClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.AttributeClausesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.BuiltInFunctionCallContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ClearcacheContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ConstantContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CountDevicesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CountNodesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CountStorageGroupContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CountTimeseriesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CreateFunctionContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CreateIndexContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CreateRoleContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CreateSnapshotContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CreateTimeseriesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CreateTriggerContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.CreateUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DateExpressionContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DeletePartitionContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DeleteStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DeleteStorageGroupContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DeleteTimeseriesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DropFunctionContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DropIndexContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DropRoleContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DropTriggerContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.DropUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.FillClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.FillStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.FlushContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.FromClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.FullMergeContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.FullPathContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.FunctionAsClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.FunctionAsElementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GrantRoleContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GrantRoleToUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GrantUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GrantWatermarkEmbeddingContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GroupByFillClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GroupByFillStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GroupByLevelClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GroupByLevelStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GroupByTimeClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.GroupByTimeStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.InClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.IndexPredicateClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.IndexWithClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.InsertColumnsSpecContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.InsertMultiValueContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.InsertStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.InsertValuesSpecContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.KillQueryContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.LastClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.LastElementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.LimitClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.LimitStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ListAllRoleOfUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ListAllUserOfRoleContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ListPrivilegesRoleContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ListPrivilegesUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ListRoleContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ListRolePrivilegesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ListUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ListUserPrivilegesContext;
+import 
org.apache.iotdb.db.qp.sql.SqlBaseParser.LoadConfigurationStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.LoadFilesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.LoadStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.MeasurementNameContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.MeasurementValueContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.MergeContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.MoveFileContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.NodeNameContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.NodeNameWithoutStarContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.OffsetClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.OrExpressionContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.OrderByTimeClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.OrderByTimeStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.PredicateContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.PrefixPathContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.PrivilegesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.PropertyContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.PropertyValueContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.RemoveFileContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.RevokeRoleContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.RevokeRoleFromUserContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.RevokeUserContext;
+import 
org.apache.iotdb.db.qp.sql.SqlBaseParser.RevokeWatermarkEmbeddingContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.RootOrIdContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SelectStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SequenceClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SetStorageGroupContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SetTTLStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowAllTTLStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowChildNodesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowChildPathsContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowDevicesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowFlushTaskInfoContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowFunctionsContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowMergeStatusContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowQueryProcesslistContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowStorageGroupContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowTTLStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowTimeseriesContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowTriggersContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowVersionContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.ShowWhereClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SingleStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SlimitClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SlimitStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SoffsetClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SpecialLimitStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.StartTriggerContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.StopTriggerContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.StringLiteralContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.SuffixPathContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.TableCallContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.TableElementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.TagClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.TimeIntervalContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.TracingOffContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.TracingOnContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.TriggerAttributeContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.TypeClauseContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.UdfAttributeContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.UdfCallContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.UnsetTTLStatementContext;
+import org.apache.iotdb.db.qp.sql.SqlBaseParser.WhereClauseContext;
 import org.apache.iotdb.db.qp.utils.DatetimeUtils;
 import org.apache.iotdb.db.query.executor.fill.IFill;
 import org.apache.iotdb.db.query.executor.fill.LinearFill;
@@ -128,7 +265,7 @@ public class IoTDBSqlVisitor extends 
SqlBaseBaseVisitor<Operator> {
   @Override
   public Operator visitSingleStatement(SingleStatementContext ctx) {
     Operator operator = visit(ctx.statement());
-    if (ctx.EXPLAIN() != null) {
+    if (ctx.DEBUG() != null) {
       operator.setDebug(true);
     }
     return operator;
diff --git 
a/server/src/main/java/org/apache/iotdb/db/query/executor/LastQueryExecutor.java
 
b/server/src/main/java/org/apache/iotdb/db/query/executor/LastQueryExecutor.java
index 3bd3eb1..d6a3169 100644
--- 
a/server/src/main/java/org/apache/iotdb/db/query/executor/LastQueryExecutor.java
+++ 
b/server/src/main/java/org/apache/iotdb/db/query/executor/LastQueryExecutor.java
@@ -152,7 +152,13 @@ public class LastQueryExecutor {
     List<TSDataType> nonCachedDataTypes = new ArrayList<>();
     List<Pair<Boolean, TimeValuePair>> resultContainer =
         readLastPairsFromCache(
-            seriesPaths, dataTypes, filter, cacheAccessors, nonCachedPaths, 
nonCachedDataTypes);
+            seriesPaths,
+            dataTypes,
+            filter,
+            cacheAccessors,
+            nonCachedPaths,
+            nonCachedDataTypes,
+            context.isDebug());
     if (nonCachedPaths.isEmpty()) {
       return resultContainer;
     }
@@ -189,10 +195,12 @@ public class LastQueryExecutor {
           resultContainer.get(i).left = true;
           if (CACHE_ENABLED) {
             cacheAccessors.get(i).write(resultContainer.get(i).right);
-            DEBUG_LOGGER.info(
-                "[LastQueryExecutor] Update last cache for path: {} with 
timestamp: {}",
-                seriesPaths,
-                resultContainer.get(i).right.getTimestamp());
+            if (context.isDebug()) {
+              DEBUG_LOGGER.info(
+                  "[LastQueryExecutor] Update last cache for path: {} with 
timestamp: {}",
+                  seriesPaths,
+                  resultContainer.get(i).right.getTimestamp());
+            }
           }
         }
       }
@@ -206,7 +214,8 @@ public class LastQueryExecutor {
       Filter filter,
       List<LastCacheAccessor> cacheAccessors,
       List<PartialPath> restPaths,
-      List<TSDataType> restDataType) {
+      List<TSDataType> restDataType,
+      boolean debugOn) {
     List<Pair<Boolean, TimeValuePair>> resultContainer = new ArrayList<>();
     if (CACHE_ENABLED) {
       for (PartialPath path : seriesPaths) {
@@ -227,16 +236,20 @@ public class LastQueryExecutor {
         restDataType.add(dataTypes.get(i));
       } else if (!satisfyFilter(filter, tvPair)) {
         resultContainer.add(new Pair<>(true, null));
-        DEBUG_LOGGER.info(
-            "[LastQueryExecutor] Last cache hit for path: {} with timestamp: 
{}",
-            seriesPaths.get(i),
-            tvPair.getTimestamp());
+        if (debugOn) {
+          DEBUG_LOGGER.info(
+              "[LastQueryExecutor] Last cache hit for path: {} with timestamp: 
{}",
+              seriesPaths.get(i),
+              tvPair.getTimestamp());
+        }
       } else {
         resultContainer.add(new Pair<>(true, tvPair));
-        DEBUG_LOGGER.info(
-            "[LastQueryExecutor] Last cache hit for path: {} with timestamp: 
{}",
-            seriesPaths.get(i),
-            tvPair.getTimestamp());
+        if (debugOn) {
+          DEBUG_LOGGER.info(
+              "[LastQueryExecutor] Last cache hit for path: {} with timestamp: 
{}",
+              seriesPaths.get(i),
+              tvPair.getTimestamp());
+        }
       }
     }
     return resultContainer;

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