57 lines
2.2 KiB
C++
57 lines
2.2 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_COUNT_
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#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_REGEXP_COUNT_
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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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{
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namespace sql
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{
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class ObExprRegexpCount : public ObFuncExprOperator
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{
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public:
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explicit ObExprRegexpCount(common::ObIAllocator &alloc);
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virtual ~ObExprRegexpCount();
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *types,
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int64_t param_num,
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common::ObExprTypeCtx &type_ctx) const;
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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virtual bool need_rt_ctx() const override { return true; }
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static int eval_regexp_count(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int get_regexp_flags(const common::ObCollationType calc_cs_type,
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const common::ObString &match_param,
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int &flags,
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int &multi_flag);
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private:
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static int calc(int64_t &ret_count, const common::ObString &text,
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const common::ObString &pattern, int64_t position,
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const common::ObCollationType calc_cs_type,
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const common::ObString &match_param, int64_t subexpr, bool has_null_argument,
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bool reusable, ObExprRegexContext *regexp_ptr,
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common::ObExprStringBuf &string_buf,
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common::ObIAllocator &exec_ctx_alloc);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprRegexpCount);
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};
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}
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}
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#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_REGEXP_SUBSTR_ */
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