init push

src/sql/engine/expr/ob_expr_instrb.h

@@ -0,0 +1,44 @@
+/**
+ * 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 SRC_SQL_ENGINE_EXPR_OB_EXPR_INSTRB_H_
+#define SRC_SQL_ENGINE_EXPR_OB_EXPR_INSTRB_H_
+#include "sql/engine/expr/ob_expr_operator.h"
+
+namespace oceanbase {
+namespace sql {
+
+class ObExprInstrb : public ObLocationExprOperator {
+  public:
+  ObExprInstrb();
+  explicit ObExprInstrb(common::ObIAllocator& alloc);
+  virtual ~ObExprInstrb();
+  virtual int calc_result_typeN(
+      ObExprResType& type, ObExprResType* type_array, int64_t param_num, common::ObExprTypeCtx& type_ctx) const;
+  virtual int calc_resultN(
+      common::ObObj& result, const common::ObObj* param_array, int64_t param_num, common::ObExprCtx& expr_ctx) const;
+  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const;
+  static int search(
+      const common::ObString& haystack, const common::ObString& needle, int64_t start, int64_t occ, int64_t& ret_idx);
+
+  private:
+  int calc(common::ObObj& result, const common::ObObj& heystack, const common::ObObj& needle,
+      const common::ObObj& position, const common::ObObj& occurrence, common::ObExprCtx& expr_ctx) const;
+  virtual int calc_result_type2(
+      ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const;
+  DISALLOW_COPY_AND_ASSIGN(ObExprInstrb);
+};
+
+}  // end of namespace sql
+}  // end of namespace oceanbase
+
+#endif /* SRC_SQL_ENGINE_EXPR_OB_EXPR_INSTRB_H_ */