!2553 优化hint warning的处理逻辑

Merge pull request !2553 from april01xxx/dev_003_hint_warning

src/common/backend/parser/parse_hint.cpp

@@ -1490,6 +1490,10 @@ HintState* create_hintstate(const char* hints)
         hstate->cache_plan_hint = keep_last_hint_cell(hstate->cache_plan_hint);
     }
 
+    if (hstate && hstate->hint_warning != NULL) {
+        u_sess->parser_cxt.has_hintwarning = true;
+    }
+
     pfree_ext(hint_str);
     return hstate;
 }

src/gausskernel/optimizer/plan/planner.cpp

@@ -587,7 +587,10 @@ PlannedStmt* standard_planner(Query* parse, int cursorOptions, ParamListInfo bou
         glob->vectorized = false;
     /* Assume work mem is at least 1/4 of query mem */
     glob->minopmem = Min(available_mem / 4, OPT_MAX_OP_MEM);
-    parse_hint_warning = retrieve_query_hint_warning((Node*)parse);
+
+    if (u_sess->parser_cxt.has_hintwarning) {
+        parse_hint_warning = retrieve_query_hint_warning((Node*)parse);
+    }
 
     /*
      * Set up default exec_nodes, we fist build re-cursively iterate parse->rtable

src/gausskernel/process/tcop/postgres.cpp

@@ -2866,6 +2866,9 @@ static void exec_simple_query(const char* query_string, MessageType messageType,
     /* Reset the single_shard_stmt flag */
     u_sess->exec_cxt.single_shard_stmt = false;
 
+    /* Reset hint flag */
+    u_sess->parser_cxt.has_hintwarning = false;
+
     MemoryContextDelete(OptimizerContext);
 
     /*
@@ -5154,6 +5157,9 @@ static void exec_execute_message(const char* portal_name, long max_rows)
             WLMParctlRelease(&t_thrd.wlm_cxt.parctl_state);
     }
 
+    /* Reset hint flag */
+    u_sess->parser_cxt.has_hintwarning = false;
+
     /*
      * Emit duration logging if appropriate.
      */
@@ -7746,6 +7752,9 @@ int PostgresMain(int argc, char* argv[], const char* dbname, const char* usernam
         gstrace_tryblock_exit(true, oldTryCounter);
         Assert(t_thrd.proc->dw_pos == -1);
 
+        /* Reset hint flag */
+        u_sess->parser_cxt.has_hintwarning = false;
+
         (void)pgstat_report_waitstatus(STATE_WAIT_UNDEFINED);
         t_thrd.pgxc_cxt.GlobalNetInstr = NULL;
         /* output the memory tracking information when error happened */
@@ -11680,6 +11689,9 @@ static void exec_batch_bind_execute(StringInfo input_message)
     /* end batch, reset gpc batch flag */
     u_sess->pcache_cxt.gpc_in_batch = false;
 
+    /* Reset hint flag */
+    u_sess->parser_cxt.has_hintwarning = false;
+
     /* Done with the snapshot used */
     if (snapshot_set)
         PopActiveSnapshot();

src/include/knl/knl_session.h

@@ -422,6 +422,8 @@ typedef struct knl_u_parser_context {
     bool isCreateFuncOrProc;
     
     bool isTimeCapsule;
+
+    bool has_hintwarning;
 } knl_u_parser_context;
 
 typedef struct knl_u_trigger_context {