[CP] fix baseline key changed by get pl function

src/pl/ob_pl.cpp

@@ -1564,6 +1564,7 @@ int ObPL::get_pl_function(ObExecContext &ctx,
   OZ (ObPLContext::valid_execute_context(ctx));
   if (OB_SUCC(ret)) {
     ObPlanCache *plan_cache = ctx.get_my_session()->get_plan_cache();
+    ObPlanBaseKeyGuard guard(ctx.get_sql_ctx()->spm_ctx_.bl_key_);
     ObPlanCacheCtx pc_ctx(sql,
                           true, // PS_MODE
                           ctx.get_allocator(),
@@ -1692,6 +1693,7 @@ int ObPL::get_pl_function(ObExecContext &ctx,
   } else { // standalone routine
     static const ObString PLSQL = ObString("PL/SQL");
     ObPlanCache *plan_cache = ctx.get_my_session()->get_plan_cache();
+    ObPlanBaseKeyGuard guard(ctx.get_sql_ctx()->spm_ctx_.bl_key_);
     ObPlanCacheCtx pc_ctx(PLSQL,
                           false, // ps mode
                           ctx.get_allocator(),

src/sql/ob_sql.h

@@ -61,9 +61,9 @@ class ObResultSet;
 class ObPlanBaseKeyGuard
 {
 public:
-  explicit ObPlanBaseKeyGuard(ObBaselineKey &bl_key)
-    : bl_key_(bl_key),
-      ori_bl_key_(bl_key) {}
+  [[nodiscard]] explicit ObPlanBaseKeyGuard(ObBaselineKey &bl_key)
+  : bl_key_(bl_key),
+    ori_bl_key_(bl_key) {}
   ~ObPlanBaseKeyGuard()
   {
     bl_key_ = ori_bl_key_;