flush_nonzero_buffer.txt

diff --git a/src/backend/commands/copyfrom.c b/src/backend/commands/copyfrom.c
index 245a260982..203289f7f2 100644
--- a/src/backend/commands/copyfrom.c
+++ b/src/backend/commands/copyfrom.c
@@ -329,7 +329,8 @@ CopyMultiInsertBufferFlush(CopyMultiInsertInfo *miinfo,
                           resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize != NULL);
 
                /* Flush into foreign table or partition */
-               do {
+               while(sent < nused)
+               {
                        int size = (resultRelInfo->ri_BatchSize < nused - sent) ?
                                                resultRelInfo->ri_BatchSize : (nused - sent);
                        int inserted = size;
@@ -340,7 +341,7 @@ CopyMultiInsertBufferFlush(CopyMultiInsertInfo *miinfo,
                                                                                                                                 NULL,
                                                                                                                                 &inserted);
                        sent += size;
-               } while (sent < nused);
+               }
        }
        else
        {