patch 4.0

src/sql/engine/expr/ob_expr_wrapper_inner.cpp

@@ -0,0 +1,63 @@
+/**
+ * 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 "ob_expr_wrapper_inner.h"
+
+namespace oceanbase
+{
+using namespace common;
+namespace sql
+{
+
+ObExprWrapperInner::ObExprWrapperInner(ObIAllocator &alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_WRAPPER_INNER, N_WRAPPER_INNER, 1, NOT_ROW_DIMENSION,
+                         INTERNAL_IN_MYSQL_MODE, INTERNAL_IN_ORACLE_MODE)
+{
+}
+
+int ObExprWrapperInner::calc_result_type1(ObExprResType &type,
+                                           ObExprResType &arg,
+                                           common::ObExprTypeCtx &) const
+{
+  int ret = OB_SUCCESS;
+  type = arg;
+  return ret;
+}
+
+int ObExprWrapperInner::cg_expr(ObExprCGCtx &,
+                                 const ObRawExpr &,
+                                 ObExpr &rt_expr) const
+{
+  int ret = OB_SUCCESS;
+  CK(1 == rt_expr.arg_cnt_);
+  rt_expr.eval_func_ = &ObExprWrapperInner::eval_wrapper_inner;
+  return ret;
+}
+
+int ObExprWrapperInner::eval_wrapper_inner(const ObExpr &expr,
+                                         ObEvalCtx &ctx,
+                                         ObDatum &expr_datum)
+{
+  int ret = OB_SUCCESS;
+  ObDatum *arg = NULL;
+  if (OB_FAIL(expr.eval_param_value(ctx, arg))) {
+    LOG_WARN("expr evaluate parameter failed", K(ret));
+  } else {
+    expr_datum.set_datum(*arg);
+  }
+  return ret;
+}
+
+} // namespace sql
+} // namespace oceanbase