fix print ddl log coredump casued by genearted column index

src/share/ob_index_builder_util.cpp

@@ -498,9 +498,13 @@ int ObIndexBuilderUtil::adjust_fulltext_args(
   int ret = OB_SUCCESS;
   ObIArray<ObString>& fulltext_columns = arg.fulltext_columns_;
   ObIArray<ObColumnSortItem>& sort_items = arg.index_columns_;
+  ObIAllocator *allocator = arg.index_schema_.get_allocator();
   ObArray<ObColumnSortItem> new_sort_items;
   uint64_t virtual_column_id = OB_INVALID_ID;
-  if (fulltext_columns.count() > 0) {
+  if (OB_ISNULL(allocator)) {
+    ret = OB_ALLOCATE_MEMORY_FAILED;
+    LOG_WARN("allocator is null", K(ret));
+  } else if (fulltext_columns.count() > 0) {
     OrderFTColumns order_ft_columns;
     int64_t ft_begin_index = 0;  // first column idx in ft index
     int64_t ft_end_index = 0;    // last column idx in ft index
@@ -534,7 +538,9 @@ int ObIndexBuilderUtil::adjust_fulltext_args(
         LOG_WARN("generate fulltext column failed", K(ret));
       } else if (OB_ISNULL(tmp_ft_col)) {
         LOG_WARN("fulltext column schema is null", K(ret));
-      } else if (FALSE_IT(ft_sort_item.column_name_ = tmp_ft_col->get_column_name_str())) {
+      } else if (OB_FAIL(ob_write_string(*allocator, tmp_ft_col->get_column_name_str(), ft_sort_item.column_name_))) {
+        // to keep the memory lifetime of column_name consistent with index_arg
+        LOG_WARN("deep copy column name failed", K(ret));
       } else if (OB_FAIL(new_sort_items.push_back(ft_sort_item))) {
         LOG_WARN("store new sort items failed", K(ret));
       } else if (data_schema.get_column_count() > old_cnt) {
@@ -557,12 +563,17 @@ int ObIndexBuilderUtil::adjust_ordinary_index_column_args(
     ObCreateIndexArg& arg, ObTableSchema& data_schema, ObIArray<ObColumnSchemaV2*>& gen_columns)
 {
   int ret = OB_SUCCESS;
-  ObIArray<ObColumnSortItem>& sort_items = arg.index_columns_;
+  ObIAllocator *allocator = arg.index_schema_.get_allocator();
+  ObIArray<ObColumnSortItem> &sort_items = arg.index_columns_;
   ObArray<ObColumnSortItem> new_sort_items;
   ObWorker::CompatMode compat_mode = ObWorker::CompatMode::MYSQL;
   uint64_t tenant_id = extract_tenant_id(data_schema.get_table_id());
   ObCompatModeGetter::get_tenant_mode(tenant_id, compat_mode);
   CompatModeGuard compat_guard(compat_mode);
+  if (OB_ISNULL(allocator)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("allocator is null", K(ret));
+  }
   for (int64_t i = 0; OB_SUCC(ret) && i < sort_items.count(); ++i) {
     int64_t old_cnt = data_schema.get_column_count();
     ObColumnSortItem new_sort_item = sort_items.at(i);
@@ -628,7 +639,11 @@ int ObIndexBuilderUtil::adjust_ordinary_index_column_args(
       }
     }
     if (OB_SUCC(ret)) {
-      if (OB_FAIL(new_sort_items.push_back(new_sort_item))) {
+      ObString tmp_name = new_sort_item.column_name_;
+      // Keep the memory lifetime of column_name consistent with index_arg
+      if (OB_FAIL(ob_write_string(*allocator, tmp_name, new_sort_item.column_name_))) {
+        LOG_WARN("deep copy column name failed", K(ret));
+      } else if (OB_FAIL(new_sort_items.push_back(new_sort_item))) {
         LOG_WARN("store new sort item failed", K(ret), K(new_sort_item));
       } else if (data_schema.get_column_count() > old_cnt) {
         LOG_INFO("column info", KPC(gen_col), K(old_cnt), K(data_schema.get_column_count()));