46 lines
1.9 KiB
C++
46 lines
1.9 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_REGEXP_SUBSTR_
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#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_REGEXP_SUBSTR_
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#include "lib/string/ob_string.h"
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#include "sql/engine/expr/ob_expr_regexp_context.h"
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namespace oceanbase {
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namespace sql {
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class ObExprRegexpSubstr : public ObStringExprOperator {
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public:
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explicit ObExprRegexpSubstr(common::ObIAllocator& alloc);
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virtual ~ObExprRegexpSubstr();
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virtual int calc_result_typeN(
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ObExprResType& type, ObExprResType* types, int64_t param_num, common::ObExprTypeCtx& type_ctx) const override;
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virtual int calc_resultN(
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common::ObObj& result, const common::ObObj* objs, int64_t param_num, common::ObExprCtx& expr_ctx) const override;
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virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
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static int eval_regexp_substr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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private:
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static int calc(common::ObString& result, bool& is_null, const common::ObString& text,
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const common::ObString& pattern, int64_t position, int64_t occurrence, const common::ObCollationType cs_type,
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const common::ObString& match_param, int64_t subexpr, bool has_null_argument, ObExprRegexContext* regexp_ptr,
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common::ObExprStringBuf& string_buf);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprRegexpSubstr);
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};
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} // namespace sql
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} // namespace oceanbase
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#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_REGEXP_SUBSTR_ */
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