issue修改：修改gsql命令行执行命令时，部分暂存区的语句被清空没有上传至statement_history中的问题

src/gausskernel/cbb/instruments/statement/instr_statement.cpp

@@ -887,7 +887,6 @@ static void FlushAllStatement()
 
 static void StatementFlush()
 {
-    const int flush_usleep_interval = 100000;
     int count = 0;
     bool is_readonly_log_needed = false;
 
@@ -899,7 +898,7 @@ static void StatementFlush()
                 ereport(WARNING, (errmodule(MOD_INSTR),
                     errmsg("[Statement] cannot flush suspend list to statement_history in a read-only transaction")));
             }
-            pg_usleep(flush_usleep_interval);
+            pg_usleep(FLUSH_USLEEP_INTERVAL);
             continue;
         }
         if (is_readonly_log_needed) {
@@ -919,7 +918,7 @@ static void StatementFlush()
         /* report statement_history state to pgstat */
         if (OidIsValid(u_sess->proc_cxt.MyDatabaseId))
             pgstat_report_stat(true);
-        pg_usleep(flush_usleep_interval);
+        pg_usleep(FLUSH_USLEEP_INTERVAL);
     }
 }
 

src/gausskernel/storage/ipc/ipc.cpp

@@ -51,6 +51,7 @@
 #include "utils/plog.h"
 #include "threadpool/threadpool.h"
 #include "instruments/instr_user.h"
+#include "instruments/instr_statement.h"
 #include "utils/postinit.h"
 #ifdef ENABLE_MOT
 #include "storage/mot/mot_fdw.h"
@@ -167,6 +168,15 @@ void proc_exit(int code)
         }
     }
 
+    /* Wait for all statements that have not been flushed to complete flushing.
+     * The flush usleep wait interval is 100,000 microseconds,
+     * therefore we set it here to 300,000 microseconds for a safe margin.
+     */
+    if (u_sess->statement_cxt.suspend_count != 0) {
+        int flushWaitInterval = 3 * FLUSH_USLEEP_INTERVAL;
+        pg_usleep(flushWaitInterval);
+    }
+
     if (t_thrd.utils_cxt.backend_reserved) {
         ereport(DEBUG2, (errmodule(MOD_MEM),
             errmsg("[BackendReservedExit] current thread role is: %d, used memory is: %d MB\n",

src/include/instruments/instr_statement.h

@@ -162,7 +162,7 @@ struct StatementDetail {
 #define STATEMENT_DETAIL_TYPE_PRETTY "pretty"
 
 #define Anum_statement_history_finish_time 12
-
+#define FLUSH_USLEEP_INTERVAL 100000
 /* entry for full/slow sql stat */
 typedef struct StatementStatContext {
     void *next;             /* next item if in free or suspend list */