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src/sql/engine/expr/ob_expr_part_id.cpp

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+/**
+ * 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_part_id.h"
+#include "share/ob_i_sql_expression.h"
+#include "sql/engine/ob_exec_context.h"
+
+namespace oceanbase {
+namespace sql {
+
+ObExprPartId::ObExprPartId(common::ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_PART_ID, N_PART_ID, 1, NOT_ROW_DIMENSION)
+{}
+
+int ObExprPartId::calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const
+{
+  UNUSED(type_ctx);
+  int ret = common::OB_SUCCESS;
+  if (!type1.is_uint64()) {
+    ret = common::OB_INVALID_ARGUMENT;
+    LOG_WARN("type1 is not int", K(type1));
+  } else {
+    type.set_int();
+    type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].scale_);
+    type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
+    type.set_result_flag(OB_MYSQL_NOT_NULL_FLAG);
+  }
+  return ret;
+}
+
+int ObExprPartId::calc_result1(common::ObObj& result, const common::ObObj& obj, common::ObExprCtx& expr_ctx) const
+{
+  int ret = common::OB_SUCCESS;
+  UNUSED(obj);
+  UNUSED(expr_ctx);
+  result.set_int(0);
+  return ret;
+}
+
+int ObExprPartId::cg_expr(ObExprCGCtx&, const ObRawExpr&, ObExpr& rt_expr) const
+{
+  int ret = OB_SUCCESS;
+  rt_expr.eval_func_ = &ObExprPartId::eval_part_id;
+  return ret;
+}
+
+int ObExprPartId::eval_part_id(const ObExpr&, ObEvalCtx&, ObDatum& expr_datum)
+{
+  int ret = OB_SUCCESS;
+  expr_datum.set_int(0);
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase