patch 4.0

src/sql/resolver/cmd/ob_help_stmt.h

@@ -0,0 +1,49 @@
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#ifndef OCEANBASE_SQL_RESOLVER_CMD_OB_OB_HELP_STMT_
+#define OCEANBASE_SQL_RESOLVER_CMD_OB_OB_HELP_STMT_
+
+#include "lib/string/ob_string.h"
+#include "lib/container/ob_array.h"
+#include "common/row/ob_row_store.h"
+#include "sql/resolver/dml/ob_dml_stmt.h"
+namespace oceanbase
+{
+namespace sql
+{
+class ObHelpStmt : public ObDMLStmt
+{
+public:
+  ObHelpStmt();
+  virtual ~ObHelpStmt();
+  int add_row(const common::ObNewRow &row) { return row_store_.add_row(row); }
+  int clear_row_store()
+  {
+    row_store_.clear_rows();
+    return common::OB_SUCCESS;
+  }
+  const common::ObRowStore& get_row_store() const { return row_store_; }
+  int rollback_last_row() {  return row_store_.rollback_last_row(); }
+  int set_col_count(int64_t col_count) { return row_store_.set_col_count(col_count); }
+  int64_t get_col_count() const { return row_store_.get_col_count(); }
+  int get_col_name(int64_t idx, common::ObString &col_name);
+  int64_t get_row_count() const { return row_store_.get_row_count(); }
+  int add_col_name(common::ObString col_name);
+private:
+  common::ObRowStore row_store_;
+  common::ObSEArray<common::ObString, 3, common::ModulePageAllocator, true> col_names_;
+  DISALLOW_COPY_AND_ASSIGN(ObHelpStmt);
+};
+}//sql
+}//observer
+#endif /*OCEANBASE_SQL_RESOLVER_CMD_OB_OB_HELP_STMT_*/