[scn] add params to control error printing in SCN::get_val_for_tx()

src/share/scn.cpp

@@ -363,11 +363,15 @@ int SCN::convert_for_tx(int64_t val)
   return ret;
 }
 
-int64_t SCN::get_val_for_tx() const
+int64_t SCN::get_val_for_tx(const bool ignore_invalid_scn) const
 {
-  int64_t result_val = 0;
+  int64_t result_val = -1;
   if (!is_valid()) {
-    PALF_LOG(ERROR, "invalid SCN", K(val_));
+    if (!ignore_invalid_scn) {
+      PALF_LOG(ERROR, "invalid SCN", K(val_));
+    } else {
+      PALF_LOG(WARN, "invalid SCN", K(val_));
+    }
   } else if (OB_MAX_SCN_TS_NS == ts_ns_) {
     result_val = INT64_MAX;
   } else {

src/share/scn.h

@@ -96,7 +96,7 @@ public:
   uint64_t get_val_for_sql() const;
 
   //only for tx, include transform from SCN_MAX to INT64_MAX
-  int64_t get_val_for_tx() const;
+  int64_t get_val_for_tx(const bool ignore_invalid_scn = false) const;
 
   // compare function
   bool operator==(const SCN &scn) const;

src/storage/tx/ob_keep_alive_ls_handler.cpp

@@ -204,10 +204,10 @@ void ObKeepAliveLSHandler::print_stat_info()
                                                           "Near_To_GTS_Cnt",    stat_info_.near_to_gts_cnt,
                                                           "Other_Error_Cnt",    stat_info_.other_error_cnt,
                                                           "Submit_Succ_Cnt",    stat_info_.submit_succ_cnt,
-                                                          "last_scn",           stat_info_.stat_keepalive_info_.scn_.get_val_for_tx(),
+                                                          "last_scn",           to_cstring(stat_info_.stat_keepalive_info_.scn_),
                                                           "last_lsn",           stat_info_.stat_keepalive_info_.lsn_,
                                                           "last_gts",           last_gts_,
-                                                          "min_start_scn",      stat_info_.stat_keepalive_info_.min_start_scn_.get_val_for_tx(),
+                                                          "min_start_scn",      to_cstring(stat_info_.stat_keepalive_info_.min_start_scn_),
                                                           "min_start_status",   stat_info_.stat_keepalive_info_.min_start_status_);
   stat_info_.clear_cnt();
 }