80 lines
2.9 KiB
C++
80 lines
2.9 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_INITCAP_
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#define OCEANBASE_SQL_ENGINE_EXPR_INITCAP_
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#include "sql/engine/expr/ob_expr_operator.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 ObExprInitcapCommon : public ObStringExprOperator
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{
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public:
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ObExprInitcapCommon(common::ObIAllocator &alloc,
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ObExprOperatorType type, const char *name, int32_t param_num)
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:ObStringExprOperator(alloc, type, name, param_num, VALID_FOR_GENERATED_COL)
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{}
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virtual ~ObExprInitcapCommon() {}
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static int initcap_string(const common::ObString &text,
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const common::ObCollationType cs_type,
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common::ObIAllocator *allocator,
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common::ObString &res_str,
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bool &has_first_letter);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprInitcapCommon);
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};
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class ObExprInitcap : public ObExprInitcapCommon
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{
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public:
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explicit ObExprInitcap(common::ObIAllocator &alloc);
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virtual ~ObExprInitcap();
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virtual int calc_result_type1(ObExprResType &type,
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ObExprResType &text,
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common::ObExprTypeCtx &type_ctx) const;
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virtual int cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprInitcap);
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};
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class ObExprNlsInitCap : public ObExprInitcapCommon
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{
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public:
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explicit ObExprNlsInitCap(common::ObIAllocator &alloc);
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virtual ~ObExprNlsInitCap() {}
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *texts,
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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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static int calc_nls_initcap_expr(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum &expr_datum);
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static int calc_nls_initcap_batch(const ObExpr &expr,
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ObEvalCtx &ctx,
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const ObBitVector &skip,
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const int64_t batch_size);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprNlsInitCap);
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};
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}
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}
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#endif /* OCEANBASE_SQL_ENGINE_EXPR_INITCAP_ */
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