Fix load data bug for json type

src/sql/engine/cmd/ob_load_data_impl.cpp

@@ -44,6 +44,7 @@
 #include "storage/tx_storage/ob_tenant_freezer.h"
 #include "sql/rewrite/ob_transform_utils.h"
 #include "observer/omt/ob_tenant_timezone_mgr.h"
+#include "share/config/ob_config_helper.h"
 
 using namespace oceanbase::sql;
 using namespace oceanbase::common;
@@ -910,26 +911,15 @@ void ObCSVFormats::init(const ObDataInFileStruct &file_formats)
 ObShuffleTaskHandle::ObShuffleTaskHandle(ObDataFragMgr &main_datafrag_mgr,
                                          ObBitSet<> &main_string_values,
                                          uint64_t tenant_id)
-  : exec_ctx(allocator, GCTX.session_mgr_),
+  : allocator(ObMemAttr(tenant_id, ObModIds::OB_SQL_LOAD_DATA)),
+    exec_ctx(allocator, GCTX.session_mgr_),
     data_buffer(NULL),
     escape_buffer(NULL),
     calc_tablet_id_expr(NULL),
     datafrag_mgr(main_datafrag_mgr),
     string_values(main_string_values)
 {
-  const int64_t FILE_BUFFER_SIZE = ObLoadFileBuffer::MAX_BUFFER_SIZE;
+  attr = ObMemAttr(tenant_id, ObModIds::OB_SQL_LOAD_DATA);
-  ObMemAttr attr(tenant_id, ObModIds::OB_SQL_LOAD_DATA);
-  void *buf = NULL;
-  buf = ob_malloc(FILE_BUFFER_SIZE, attr);
-  if (OB_NOT_NULL(buf)) {
-    data_buffer = new(buf) ObLoadFileBuffer(
-          FILE_BUFFER_SIZE - sizeof(ObLoadFileBuffer));
-  }
-  buf = ob_malloc(FILE_BUFFER_SIZE, attr);
-  if (OB_NOT_NULL(buf)) {
-    escape_buffer = new(buf) ObLoadFileBuffer(
-          FILE_BUFFER_SIZE - sizeof(ObLoadFileBuffer));
-  }
 }
 
 ObShuffleTaskHandle::~ObShuffleTaskHandle()
@@ -942,6 +932,41 @@ ObShuffleTaskHandle::~ObShuffleTaskHandle()
   }
 }
 
+int ObShuffleTaskHandle::expand_buf(const int64_t max_size)
+{
+  int ret = OB_SUCCESS;
+  int64_t new_size = 0;
+  if (OB_ISNULL(data_buffer)) {
+    new_size = ObLoadFileBuffer::MAX_BUFFER_SIZE;
+  } else {
+    new_size = (sizeof(ObLoadFileBuffer) + data_buffer->get_buffer_size()) * 2;
+  }
+  if (new_size > max_size) {
+    ret = OB_SIZE_OVERFLOW;
+    LOG_WARN("buffer size not enough", K(ret));
+  } else {
+    void *buf1 = NULL;
+    void *buf2 = NULL;
+    if (OB_ISNULL(buf1 = ob_malloc(new_size, attr))
+        || OB_ISNULL(buf2 = ob_malloc(new_size, attr))) {
+      ret = OB_ALLOCATE_MEMORY_FAILED;
+    } else {
+      if (OB_NOT_NULL(data_buffer)) {
+        ob_free(data_buffer);
+      }
+      data_buffer = new(buf1) ObLoadFileBuffer(
+            new_size - sizeof(ObLoadFileBuffer));
+      if (OB_NOT_NULL(escape_buffer)) {
+        ob_free(escape_buffer);
+      }
+      escape_buffer = new(buf2) ObLoadFileBuffer(
+            new_size - sizeof(ObLoadFileBuffer));
+    }
+  }
+  LOG_DEBUG("expand buf to", K(new_size));
+  return ret;
+}
+
 int ObLoadDataSPImpl::exec_shuffle(int64_t task_id, ObShuffleTaskHandle *handle)
 {
   int ret = OB_SUCCESS;
@@ -982,6 +1007,7 @@ int ObLoadDataSPImpl::exec_shuffle(int64_t task_id, ObShuffleTaskHandle *handle)
     return true;
   };
 
+    const int64_t buf_len = handle->data_buffer->get_buffer_size() + sizeof(ObLoadFileBuffer);
   if (OB_ISNULL(handle)
       || OB_ISNULL(handle->data_buffer)
       || OB_ISNULL(handle->escape_buffer)
@@ -998,14 +1024,13 @@ int ObLoadDataSPImpl::exec_shuffle(int64_t task_id, ObShuffleTaskHandle *handle)
                        handle->generator.get_insert_exprs().count()))) {
     LOG_WARN("fail to prealloc", K(ret),
              "insert values count", handle->generator.get_insert_exprs().count());
-  } else if (OB_ISNULL(expr_buf = ob_malloc(ObLoadFileBuffer::MAX_BUFFER_SIZE,
+  } else if (OB_ISNULL(expr_buf = ob_malloc(handle->data_buffer->get_buffer_size() + sizeof(ObLoadFileBuffer),
                                             ObMemAttr(tenant_id, ObModIds::OB_SQL_LOAD_DATA)))) {
     ret = OB_ALLOCATE_MEMORY_FAILED;
     LOG_WARN("not enough memory", K(ret));
   } else {
     handle->err_records.reuse();
-    expr_buffer = new(expr_buf) ObLoadFileBuffer(ObLoadFileBuffer::MAX_BUFFER_SIZE
+    expr_buffer = new(expr_buf) ObLoadFileBuffer(handle->data_buffer->get_buffer_size());
-                                                 - sizeof(ObLoadFileBuffer));
     ObSEArray<ObCSVGeneralParser::LineErrRec, 1> err_records;
     ObSEArray<ObObj, 32> parse_result;
 
@@ -1348,62 +1373,74 @@ int ObLoadDataSPImpl::handle_returned_shuffle_task(ToolBox &box, ObShuffleTaskHa
   return ret;
 }
 
-int ObLoadDataSPImpl::next_file_buffer(ToolBox &box,
+int ObLoadDataSPImpl::next_file_buffer(ObExecContext &ctx,
-                                       ObLoadFileBuffer &data_buffer,
+                                       ToolBox &box,
+                                       ObShuffleTaskHandle *handle,
                                        int64_t limit)
 {
   int ret = OB_SUCCESS;
+  bool has_valid_data = false;
 
-  //从data_trimer中恢复出上次读取剩下的数据
+  CK (OB_NOT_NULL(handle) && OB_NOT_NULL(handle->data_buffer));
-  OZ (box.data_trimer.recover_incomplate_data(data_buffer));
 
-  if (ObLoadFileLocation::SERVER_DISK == box.load_file_storage) {
+  do {
-    OZ (box.file_reader.pread(data_buffer.current_ptr(),
+
-                              data_buffer.get_remain_len(),
+    //从data_trimer中恢复出上次读取剩下的数据
-                              box.read_cursor.file_offset_,
+    OZ (box.data_trimer.recover_incomplate_data(*handle->data_buffer));
-                              box.read_cursor.read_size_));
+
-  } else {
+    if (ObLoadFileLocation::SERVER_DISK == box.load_file_storage) {
-    OZ (box.device_handle_->pread(box.fd_, box.read_cursor.file_offset_,
+      OZ (box.file_reader.pread(handle->data_buffer->current_ptr(),
-                                data_buffer.get_remain_len(),
+                                handle->data_buffer->get_remain_len(),
-                                data_buffer.current_ptr(),
+                                box.read_cursor.file_offset_,
                                 box.read_cursor.read_size_));
-  }
-
-  if (OB_SUCC(ret)) {
-    if (OB_UNLIKELY(0 == box.read_cursor.read_size_)) {
-      box.read_cursor.is_end_file_ = true;
-      LOG_DEBUG("LOAD DATA reach file end", K(box.read_cursor));
     } else {
-      data_buffer.update_pos(box.read_cursor.read_size_); //更新buffer中数据长度
+      OZ (box.device_handle_->pread(box.fd_, box.read_cursor.file_offset_,
-      int64_t last_proccessed_GBs = box.read_cursor.get_total_read_GBs();
+                                  handle->data_buffer->get_remain_len(),
-      box.read_cursor.commit_read();
+                                  handle->data_buffer->current_ptr(),
-      int64_t processed_GBs = box.read_cursor.get_total_read_GBs();
+                                  box.read_cursor.read_size_));
-      if (processed_GBs != last_proccessed_GBs) {
+    }
-        LOG_INFO("LOAD DATA file read progress: ", K(processed_GBs));
+
+    if (OB_SUCC(ret)) {
+      if (OB_UNLIKELY(0 == box.read_cursor.read_size_)) {
+        box.read_cursor.is_end_file_ = true;
+        LOG_DEBUG("LOAD DATA reach file end", K(box.read_cursor));
+      } else {
+        handle->data_buffer->update_pos(box.read_cursor.read_size_); //更新buffer中数据长度
+        int64_t last_proccessed_GBs = box.read_cursor.get_total_read_GBs();
+        box.read_cursor.commit_read();
+        int64_t processed_GBs = box.read_cursor.get_total_read_GBs();
+        if (processed_GBs != last_proccessed_GBs) {
+          LOG_INFO("LOAD DATA file read progress: ", K(processed_GBs));
+        }
+
+        box.job_status->read_bytes_ += box.read_cursor.read_size_;
       }
-
-      box.job_status->read_bytes_ += data_buffer.get_data_len();
     }
-  }
 
-  //从buffer中找出完整的行，剩下的备份到 data_trimer
+    //从buffer中找出完整的行，剩下的备份到 data_trimer
-  if (OB_SUCC(ret) && OB_LIKELY(data_buffer.is_valid())) {
+    if (OB_SUCC(ret) && OB_LIKELY(handle->data_buffer->is_valid())) {
-    int64_t complete_cnt = limit;
+      int64_t complete_cnt = limit;
-    int64_t complete_len = 0;
+      int64_t complete_len = 0;
-    if (OB_FAIL(pre_parse_lines(data_buffer, box.parser,
+      if (OB_FAIL(pre_parse_lines(*handle->data_buffer, box.parser,
-                                box.read_cursor.is_end_file(),
+                                  box.read_cursor.is_end_file(),
-                                complete_len, complete_cnt))) {
+                                  complete_len, complete_cnt))) {
-      LOG_WARN("fail to fast_lines_parse", K(ret));
+        LOG_WARN("fail to fast_lines_parse", K(ret));
-    } else if (OB_FAIL(box.data_trimer.backup_incomplate_data(data_buffer,
+      } else if (OB_FAIL(box.data_trimer.backup_incomplate_data(*handle->data_buffer,
-                                                              complete_len))) {
+                                                                complete_len))) {
-      LOG_WARN("fail to back up data", K(ret));
+        LOG_WARN("fail to back up data", K(ret));
-    } else {
+      } else {
-      box.data_trimer.commit_line_cnt(complete_cnt);
+        box.data_trimer.commit_line_cnt(complete_cnt);
-      LOG_DEBUG("LOAD DATA",
+        has_valid_data = complete_cnt > 0;
-          "split offset", box.read_cursor.file_offset_ - box.data_trimer.get_incomplate_data_string().length(),
+        LOG_DEBUG("LOAD DATA",
-          "incomplate data", box.data_trimer.get_incomplate_data_string());
+            "split offset", box.read_cursor.file_offset_ - box.data_trimer.get_incomplate_data_string().length(),
+            K(complete_len), K(complete_cnt),
+            "incomplate data length", box.data_trimer.get_incomplate_data_string().length(),
+            "incomplate data", box.data_trimer.get_incomplate_data_string());
+      }
     }
-  }
+  } while (OB_SUCC(ret) && !has_valid_data && !box.read_cursor.is_end_file_
+           && OB_SUCC(handle->expand_buf(box.batch_buffer_size))
+           && OB_SUCC(box.data_trimer.expand_buf(ctx.get_allocator())));
   return ret;
 }
 
@@ -1448,7 +1485,7 @@ int ObLoadDataSPImpl::shuffle_task_gen_and_dispatch(ObExecContext &ctx, ToolBox
     if (OB_SUCC(ret)) {
       if (OB_FAIL(box.file_buf_row_num.push_back(box.data_trimer.get_lines_count()))) {
         LOG_WARN("fail to push back", K(ret));
-      } else if (OB_FAIL(next_file_buffer(box, *(handle->data_buffer)))) {
+      } else if (OB_FAIL(next_file_buffer(ctx, box, handle))) {
         LOG_WARN("fail get next file buffer", K(ret));
       }
     }
@@ -1928,8 +1965,7 @@ int ObLoadDataSPImpl::execute(ObExecContext &ctx, ObLoadDataStmt &load_stmt)
     while (OB_SUCC(ret)
            && !box.read_cursor.is_end_file()
            && box.data_trimer.get_lines_count() < box.ignore_rows) {
-      box.expr_buffer->reset();
+      OZ (next_file_buffer(ctx, box, box.temp_handle,
-      OZ (next_file_buffer(box, *box.expr_buffer,
                            box.ignore_rows - box.data_trimer.get_lines_count()));
       LOG_DEBUG("LOAD DATA ignore rows", K(box.ignore_rows), K(box.data_trimer.get_lines_count()));
     }
@@ -2005,9 +2041,9 @@ int ObLoadFileDataTrimer::backup_incomplate_data(ObLoadFileBuffer &buffer, int64
 {
   int ret = OB_SUCCESS;
   incomplate_data_len_ = buffer.get_data_len() - valid_data_len;
-  if (incomplate_data_len_ > ObLoadFileBuffer::MAX_BUFFER_SIZE) {
+  if (incomplate_data_len_ > incomplate_data_buf_len_) {
     ret = OB_SIZE_OVERFLOW;
-    LOG_WARN("size over flow", K(ret), K(incomplate_data_len_));
+    LOG_WARN("size over flow", K(ret), K(incomplate_data_len_), K(incomplate_data_buf_len_));
   } else if (incomplate_data_len_ > 0 && NULL != incomplate_data_) {
     MEMCPY(incomplate_data_, buffer.begin_ptr() + valid_data_len, incomplate_data_len_);
     buffer.update_pos(-incomplate_data_len_);
@@ -2310,18 +2346,31 @@ int ObPartDataFragMgr::update_part_location(ObExecContext &ctx)
   return ret;
 }
 
-int ObLoadFileDataTrimer::init(ObIAllocator &allocator, const ObCSVFormats &formats)
+int ObLoadFileDataTrimer::expand_buf(ObIAllocator &allocator)
 {
   int ret = OB_SUCCESS;
-  if (OB_ISNULL(incomplate_data_
+
-                = static_cast<char*>(allocator.alloc(ObLoadFileBuffer::MAX_BUFFER_SIZE)))) {
+  int64_t new_buf_len = incomplate_data_buf_len_ * (NULL != incomplate_data_ ? 2 : 1);
+  char *new_buf = NULL;
+  if (OB_ISNULL(new_buf = static_cast<char*>(allocator.alloc(new_buf_len)))) {
     ret = OB_ALLOCATE_MEMORY_FAILED;
     LOG_WARN("no memory", K(ret));
+  } else {
+    if (NULL != incomplate_data_) {
+      MEMCPY(new_buf, incomplate_data_, incomplate_data_len_);
+    }
+    incomplate_data_ = new_buf;
+    incomplate_data_buf_len_ = new_buf_len;
   }
-  formats_ = formats;
   return ret;
 }
 
+int ObLoadFileDataTrimer::init(ObIAllocator &allocator, const ObCSVFormats &formats)
+{
+  formats_ = formats;
+  return expand_buf(allocator);
+}
+
 int ObLoadDataSPImpl::ToolBox::release_resources()
 {
   int ret = OB_SUCCESS;
@@ -2424,6 +2473,10 @@ int ObLoadDataSPImpl::ToolBox::release_resources()
     common::ObDeviceManager::get_instance().release_device(device_handle_);
   }
 
+  if (OB_NOT_NULL(temp_handle)) {
+    temp_handle->~ObShuffleTaskHandle();
+  }
+
   return ret;
 }
 
@@ -2825,6 +2878,8 @@ int ObLoadDataSPImpl::ToolBox::init(ObExecContext &ctx, ObLoadDataStmt &load_stm
 
   if (OB_SUCC(ret)) {
     int64_t hint_batch_size = 0;
+    int64_t hint_max_batch_buffer_size = 0;
+    ObString hint_batch_buffer_size_str;
     if (OB_FAIL(hint.get_value(ObLoadDataHint::BATCH_SIZE, hint_batch_size))) {
       LOG_WARN("fail to get value", K(ret));
     } else if (0 == hint_batch_size) {
@@ -2832,7 +2887,22 @@ int ObLoadDataSPImpl::ToolBox::init(ObExecContext &ctx, ObLoadDataStmt &load_stm
     } else {
       batch_row_count = std::max(1L, std::min(DEFAULT_BUFFERRED_ROW_COUNT, hint_batch_size));
     }
-    LOG_DEBUG("batch size", K(hint_batch_size), K(batch_row_count));
+    if (OB_SUCC(ret)) {
+      if (OB_FAIL(hint.get_value(ObLoadDataHint::BATCH_BUFFER_SIZE, hint_batch_buffer_size_str))) {
+        LOG_WARN("fail to get value", K(ret));
+      } else {
+        bool is_valid = false;
+        hint_batch_buffer_size_str = hint_batch_buffer_size_str.trim();
+        if (!hint_batch_buffer_size_str.empty()) {
+          hint_max_batch_buffer_size = ObConfigCapacityParser::get(to_cstring(hint_batch_buffer_size_str), is_valid);
+        }
+        if (!is_valid) {
+          hint_max_batch_buffer_size = 1L << 30; // 1G
+        }
+        batch_buffer_size = MAX(ObLoadFileBuffer::MAX_BUFFER_SIZE, hint_max_batch_buffer_size);
+      }
+    }
+    LOG_DEBUG("batch size", K(hint_batch_size), K(batch_row_count), K(batch_buffer_size));
   }
 
   if (OB_SUCC(ret)) {
@@ -2882,18 +2952,31 @@ int ObLoadDataSPImpl::ToolBox::init(ObExecContext &ctx, ObLoadDataStmt &load_stm
     }
 */
 
+
+
+    if (OB_SUCC(ret)) {
+      if (OB_ISNULL(temp_handle = OB_NEWx(ObShuffleTaskHandle, (&ctx.get_allocator()),
+                                          data_frag_mgr, string_type_column_bitset, tenant_id))) {
+        ret = OB_ALLOCATE_MEMORY_FAILED;
+        LOG_WARN("Failed to alloc", K(ret));
+      } else if (OB_FAIL(temp_handle->expand_buf(batch_buffer_size))) {
+        LOG_WARN("fail to expand buf", K(ret));
+      }
+    }
+
     for (int i = 0; OB_SUCC(ret) && i < shuffle_task_controller.get_max_parallelism(); ++i) {
       ObShuffleTaskHandle *handle = nullptr;
       int64_t pos = 0;
 
       if (OB_ISNULL(handle = OB_NEWx(ObShuffleTaskHandle, (&ctx.get_allocator()),
-                                     data_frag_mgr, string_type_column_bitset, tenant_id))
+                                     data_frag_mgr, string_type_column_bitset, tenant_id))) {
-          || OB_ISNULL(handle->data_buffer)) {
         ret = OB_ALLOCATE_MEMORY_FAILED;
         LOG_WARN("Failed to alloc", K(ret));
       } else {
-        if (OB_FAIL(handle->exec_ctx.deserialize(exec_ctx_serialized_data.ptr(),
+        if (OB_FAIL(handle->expand_buf(batch_buffer_size))) {
-                                                 exec_ctx_serialized_data.length(), pos))) {
+          LOG_WARN("fail to expand buf", K(ret));
+        } else if (OB_FAIL(handle->exec_ctx.deserialize(exec_ctx_serialized_data.ptr(),
+                                                        exec_ctx_serialized_data.length(), pos))) {
           LOG_WARN("fail to deserialize", K(ret));
         } else if (OB_FAIL(handle->parser.init(file_formats, num_of_file_column, load_args.file_cs_type_))) {
           LOG_WARN("fail to init parser", K(ret));

src/sql/engine/cmd/ob_load_data_impl.h

@@ -384,7 +384,8 @@ struct ObCSVFormats {
 class ObLoadFileDataTrimer
 {
 public:
-  ObLoadFileDataTrimer() : incomplate_data_(NULL), incomplate_data_len_(0), lines_cnt_(0) {}
+  ObLoadFileDataTrimer() : incomplate_data_(NULL), incomplate_data_len_(0),
+    incomplate_data_buf_len_(ObLoadFileBuffer::MAX_BUFFER_SIZE), lines_cnt_(0) {}
   int init(common::ObIAllocator &allocator, const ObCSVFormats &formats);
   //for debug
   ObString get_incomplate_data_string() {
@@ -396,10 +397,12 @@ public:
   bool has_incomplate_data() const { return incomplate_data_len_ > 0; }
   int64_t get_lines_count() const { return lines_cnt_; }
   void commit_line_cnt(int64_t line_cnt) { lines_cnt_ += line_cnt; }
+  int expand_buf(common::ObIAllocator &allocator);
 private:
-  ObCSVFormats formats_;//TODO [load data] change to ObInverseParser(formats)
+  ObCSVFormats formats_;
   char *incomplate_data_;
   int64_t incomplate_data_len_;
+  int64_t incomplate_data_buf_len_;
   int64_t lines_cnt_;
 };
 
@@ -491,6 +494,9 @@ struct ObShuffleTaskHandle {
                       common::ObBitSet<> &main_string_values,
                       uint64_t tenant_id);
   ~ObShuffleTaskHandle();
+
+  int expand_buf(const int64_t max_size);
+
   ObArenaAllocator allocator;
   ObDesExecContext exec_ctx;
   ObLoadFileBuffer *data_buffer;
@@ -505,6 +511,7 @@ struct ObShuffleTaskHandle {
   common::ObBitSet<> &string_values;
   ObShuffleResult result;
   ObSEArray<ObParserErrRec, 16> err_records;
+  common::ObMemAttr attr;
   TO_STRING_KV("task_id", result.task_id_);
 };
 
@@ -711,6 +718,7 @@ public:
     int64_t num_of_table_column;
     int64_t parallel;
     int64_t batch_row_count;
+    int64_t batch_buffer_size;
     int64_t data_frag_mem_usage_limit; //limit = data_frag_mem_usage_limit * MAX_BUFFER_SIZE
     int64_t file_size;
     int64_t ignore_rows;
@@ -737,6 +745,7 @@ public:
     common::ObSEArray<int64_t, 1> file_buf_row_num;
     int64_t last_session_check_ts;
     common::ObSEArray<ObLoadTableColumnDesc, 16> insert_infos;
+    ObShuffleTaskHandle *temp_handle;
 
     //debug values
     int64_t insert_dispatch_rows;
@@ -759,7 +768,7 @@ public:
   int execute(ObExecContext &ctx, ObLoadDataStmt &load_stmt);
 
   int shuffle_task_gen_and_dispatch(ObExecContext &ctx, ToolBox &box);
-  int next_file_buffer(ToolBox &box, ObLoadFileBuffer &data_buffer, int64_t limit = INT64_MAX);
+  int next_file_buffer(ObExecContext &ctx, ToolBox &box, ObShuffleTaskHandle *handle, int64_t limit = INT64_MAX);
   int handle_returned_shuffle_task(ToolBox &box, ObShuffleTaskHandle &handle);
   int wait_shuffle_task_return(ToolBox &box);
 

src/sql/parser/sql_parser_mysql_mode.y

@@ -9325,7 +9325,11 @@ READ_CONSISTENCY '(' consistency_level ')'
 }
 | LOAD_BATCH_SIZE '(' INTNUM ')'
 {
-  malloc_non_terminal_node($$, result->malloc_pool_, T_LOAD_BATCH_SIZE, 1, $3);
+  malloc_non_terminal_node($$, result->malloc_pool_, T_LOAD_BATCH_SIZE, 2, $3, NULL);
+}
+| LOAD_BATCH_SIZE '(' INTNUM ',' STRING_VALUE ')'
+{
+  malloc_non_terminal_node($$, result->malloc_pool_, T_LOAD_BATCH_SIZE, 2, $3, $5);
 }
 | DIRECT '(' BOOL_VALUE ',' INTNUM ')'
 {

src/sql/resolver/cmd/ob_load_data_resolver.cpp

@@ -501,7 +501,7 @@ int ObLoadDataResolver::resolve_hints(const ParseNode &node)
         break;
       }
       case T_LOAD_BATCH_SIZE: {
-        if (1 != hint_node->num_child_) {
+        if (2 != hint_node->num_child_) {
           ret = OB_ERR_UNEXPECTED;
           LOG_WARN("max concurrent node should have 1 child", K(ret));
         } else if (OB_ISNULL(hint_node->children_[0])) {
@@ -510,6 +510,11 @@ int ObLoadDataResolver::resolve_hints(const ParseNode &node)
         } else if (OB_FAIL(stmt_hints.set_value(
                         ObLoadDataHint::BATCH_SIZE, hint_node->children_[0]->value_))) {
           LOG_WARN("fail to set concurrent value", K(ret));
+        } else if (OB_NOT_NULL(hint_node->children_[1])
+                   && OB_FAIL(stmt_hints.set_value(ObLoadDataHint::BATCH_BUFFER_SIZE,
+                                              ObString(hint_node->children_[1]->str_len_,
+                                                      hint_node->children_[1]->str_value_)))) {
+          LOG_WARN("fail to set concurrent value", K(ret));
         }
         break;
       }

src/sql/resolver/cmd/ob_load_data_stmt.h

@@ -190,6 +190,7 @@ public:
   };
   enum StringHintItem {
     LOG_LEVEL,
+    BATCH_BUFFER_SIZE,
     TOTAL_STRING_ITEM
   };
   void reset()