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src/sql/engine/expr/ob_expr_regexp.h

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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.
+ */
+
+#ifndef OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_REGEXP_
+#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_REGEXP_
+
+#include "lib/string/ob_string.h"
+#include "sql/engine/expr/ob_expr_regexp_context.h"
+
+namespace oceanbase {
+namespace sql {
+class ObExprRegexp : public ObFuncExprOperator {
+  OB_UNIS_VERSION_V(1);
+
+  public:
+  explicit ObExprRegexp(common::ObIAllocator& alloc);
+  virtual ~ObExprRegexp();
+
+  virtual int assign(const ObExprOperator& other);
+
+  virtual int calc_result_type2(
+      ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const;
+  virtual int calc_result2(
+      common::ObObj& result, const common::ObObj& obj, const common::ObObj& pattern, common::ObExprCtx& expr_ctx) const;
+  virtual inline void reset()
+  {
+    regexp_idx_ = common::OB_COMPACT_INVALID_INDEX;
+    pattern_is_const_ = false;
+    value_is_const_ = false;
+    ObFuncExprOperator::reset();
+  }
+
+  inline int16_t get_regexp_idx() const
+  {
+    return regexp_idx_;
+  }
+  inline void set_regexp_idx(int16_t regexp_idx)
+  {
+    regexp_idx_ = regexp_idx;
+  }
+  inline void set_pattern_is_const(bool pattern_is_const)
+  {
+    pattern_is_const_ = pattern_is_const;
+  }
+  inline void set_value_is_const(bool value_is_const)
+  {
+    value_is_const_ = value_is_const;
+  }
+
+  virtual bool need_rt_ctx() const override
+  {
+    return true;
+  }
+  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
+
+  static int eval_regexp(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
+
+  private:
+  inline int need_fast_calc(common::ObExprCtx& expr_ctx, bool& result) const;
+
+  private:
+  int16_t regexp_idx_;  // idx of posix_regexp_list_ in plan ctx, for regexp operator
+  bool pattern_is_const_;
+  bool value_is_const_;
+
+  private:
+  // disallow copy
+  ObExprRegexp(const ObExprRegexp& other);
+  ObExprRegexp& operator=(const ObExprRegexp& ohter);
+};
+}  // namespace sql
+}  // namespace oceanbase
+#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_REGEXP_ */