[FEAT MERGE] information_schema enhence

src/sql/engine/expr/ob_expr_current_user_priv.cpp

@@ -0,0 +1,73 @@
+/**
+ * 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.
+ */
+
+#define USING_LOG_PREFIX SQL_ENG
+#include "sql/engine/expr/ob_expr_current_user_priv.h"
+#include "sql/engine/ob_physical_plan_ctx.h"
+#include "lib/mysqlclient/ob_mysql_result.h"
+#include "lib/mysqlclient/ob_mysql_transaction.h"
+#include "lib/string/ob_sql_string.h"
+#include "lib/mysqlclient/ob_mysql_proxy.h"
+#include "lib/oblog/ob_log_module.h"
+#include "sql/engine/ob_exec_context.h"
+
+using namespace oceanbase::common;
+using namespace oceanbase::sql;
+
+namespace oceanbase
+{
+namespace sql
+{
+ObExprCurrentUserPriv::ObExprCurrentUserPriv(ObIAllocator &alloc)
+  : ObFuncExprOperator(alloc, T_FUN_SYS_CURRENT_USER_PRIV,
+                       N_CURRENT_USER_PRIV, 0,
+                       NOT_ROW_DIMENSION) {
+}
+
+ObExprCurrentUserPriv::~ObExprCurrentUserPriv() {
+}
+
+int ObExprCurrentUserPriv::calc_result_type0(ObExprResType &type,
+                                             ObExprTypeCtx &type_ctx) const {
+  int ret = OB_SUCCESS;
+  UNUSED(type_ctx);
+  type.set_type(ObIntType);
+  type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].precision_);
+  type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].scale_);
+  return ret;
+}
+
+int ObExprCurrentUserPriv::eval_current_user_priv(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum) {
+  int ret = OB_SUCCESS;
+  UNUSED(expr);
+  const ObSQLSessionInfo *session_info = NULL;
+  if (OB_ISNULL(session_info = ctx.exec_ctx_.get_my_session())) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("session info is null", K(ret));
+  } else {
+    const ObPrivSet user_priv_set = session_info->get_user_priv_set();
+    expr_datum.set_int(user_priv_set);
+  }
+  return ret;
+}
+
+int ObExprCurrentUserPriv::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
+    ObExpr &rt_expr) const
+{
+  UNUSED(raw_expr);
+  UNUSED(op_cg_ctx);
+  rt_expr.eval_func_ = ObExprCurrentUserPriv::eval_current_user_priv;
+  return OB_SUCCESS;
+}
+
+}/* ns sql*/
+}/* ns oceanbase */