[FEAT MERGE]:Oracle Json Supported

src/sql/engine/expr/ob_expr_json_equal.h

@@ -0,0 +1,51 @@
+/**
+ * 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.
+ * This file contains implementation for json_equal.
+ * Authors:
+ *   wuxingying.wxy@oceanbase.com
+ */
+
+#ifndef OCEANBASE_SQL_OB_EXPR_JSON_EQUAL_H_
+#define OCEANBASE_SQL_OB_EXPR_JSON_EQUAL_H_
+
+#include "lib/json_type/ob_json_tree.h"
+#include "sql/engine/expr/ob_expr_operator.h"
+
+using namespace oceanbase::common;
+
+namespace oceanbase
+{
+namespace sql
+{
+class ObExprJsonEqual : public ObFuncExprOperator
+{
+public:
+  explicit ObExprJsonEqual(common::ObIAllocator &alloc);
+  virtual ~ObExprJsonEqual();
+  virtual int calc_result_typeN(ObExprResType& type,
+                                ObExprResType* types_stack,
+                                int64_t param_num,
+                                ObExprTypeCtx& type_ctx) const;
+  static bool is_json_scalar(ObIJsonBase *ptr);
+  static int eval_json_equal(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
+  virtual int cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
+                    ObExpr &rt_expr) const override;
+  virtual bool need_rt_ctx() const override { return true; }
+private:
+  const static uint8_t OB_JSON_FALSE_ON_ERROR = 0;
+  const static uint8_t OB_JSON_TRUE_ON_ERROR  = 1;
+  const static uint8_t OB_JSON_ERROR_ON_ERROR = 2;
+  DISALLOW_COPY_AND_ASSIGN(ObExprJsonEqual);
+};
+
+} // sql
+} // oceanbase
+#endif // OCEANBASE_SQL_OB_EXPR_JSON_EQUAL_H_