feat: explain insert select

source/libs/parser/inc/sql.y

@@ -517,6 +517,7 @@ cmd ::= RESET QUERY CACHE.
 
 /************************************************ explain *************************************************************/
 cmd ::= EXPLAIN analyze_opt(A) explain_options(B) query_or_subquery(C).           { pCxt->pRootNode = createExplainStmt(pCxt, A, B, C); }
+cmd ::= EXPLAIN analyze_opt(A) explain_options(B) insert_query(C).                { pCxt->pRootNode = createExplainStmt(pCxt, A, B, C); }
 
 %type analyze_opt                                                                 { bool }
 %destructor analyze_opt                                                           { }
@@ -599,9 +600,11 @@ cmd ::= DELETE FROM full_table_name(A) where_clause_opt(B).
 cmd ::= query_or_subquery(A).                                                     { pCxt->pRootNode = A; }
 
 /************************************************ insert **************************************************************/
-cmd ::= INSERT INTO full_table_name(A) 
-  NK_LP col_name_list(B) NK_RP query_or_subquery(C).                              { pCxt->pRootNode = createInsertStmt(pCxt, A, B, C); }
-cmd ::= INSERT INTO full_table_name(A) query_or_subquery(B).                      { pCxt->pRootNode = createInsertStmt(pCxt, A, NULL, B); }
+cmd ::= insert_query(A).                                                          { pCxt->pRootNode = A; }
+
+insert_query(A) ::= INSERT INTO full_table_name(D) 
+  NK_LP col_name_list(B) NK_RP query_or_subquery(C).                              { A = createInsertStmt(pCxt, D, B, C); }
+insert_query(A) ::= INSERT INTO full_table_name(C) query_or_subquery(B).          { A = createInsertStmt(pCxt, C, NULL, B); }
 
 /************************************************ literal *************************************************************/
 literal(A) ::= NK_INTEGER(B).                                                     { A = createRawExprNode(pCxt, &B, createValueNode(pCxt, TSDB_DATA_TYPE_UBIGINT, &B)); }

source/libs/scheduler/src/schJob.c

@@ -234,7 +234,7 @@ int32_t schBuildTaskRalation(SSchJob *pJob, SHashObj *planToTask) {
     }
 
     SSchTask *pTask = taosArrayGet(pLevel->subTasks, 0);
-    if (SUBPLAN_TYPE_MODIFY != pTask->plan->subplanType) {
+    if (SUBPLAN_TYPE_MODIFY != pTask->plan->subplanType || EXPLAIN_MODE_DISABLE != pJob->attr.explainMode) {
       pJob->attr.needFetch = true;
     }
   }