hcq/oceanbase
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

init push

Browse Source
This commit is contained in:
oceanbase-admin
2021-05-31 22:56:52 +08:00
commit cea7de1475
7020 changed files with 5689869 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
src/sql/engine/expr/ob_expr_substr.h Normal file
View File

@ -0,0 +1,62 @@
/**
* 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_SUBSTR_
#define OCEANBASE_SQL_ENGINE_EXPR_SUBSTR_
#include "sql/engine/expr/ob_expr_operator.h"
namespace oceanbase {
namespace sql {
class ObExprSubstr : public ObStringExprOperator {
public:
explicit ObExprSubstr(common::ObIAllocator& alloc);
virtual ~ObExprSubstr();
virtual int calc_result2(common::ObObj& result, const common::ObObj& text, const common::ObObj& start_pos,
common::ObExprCtx& expr_ctx) const;
virtual int calc_result3(common::ObObj& result, const common::ObObj& text, const common::ObObj& start_pos,
const common::ObObj& length, common::ObExprCtx& expr_ctx) const;
virtual int calc_result_typeN(
ObExprResType& type, ObExprResType* types_stack, int64_t param_num, common::ObExprTypeCtx& type_ctx) const;
virtual int calc_resultN(
common::ObObj& result, const common::ObObj* objs_array, int64_t param_num, common::ObExprCtx& expr_ctx) const;
static int substr(common::ObString& output, const common::ObString& input, const int64_t pos, const int64_t len,
common::ObCollationType cs_type);
static int calc(common::ObObj& result, const common::ObString& text, const int64_t start_pos, const int64_t length,
common::ObCollationType cs_type, const bool is_clob);
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
static int eval_substr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
private:
int calc_result_length(
ObExprResType* types_array, int64_t param_num, common::ObCollationType cs_type, int64_t& res_len) const;
int calc_result2_for_mysql(common::ObObj& result, const common::ObObj& text, const common::ObObj& start_pos,
common::ObExprCtx& expr_ctx) const;
int calc_result2_for_oracle(common::ObObj& result, const common::ObObj& text, const common::ObObj& start_pos,
common::ObExprCtx& expr_ctx) const;
int calc_result3_for_mysql(common::ObObj& result, const common::ObObj& text, const common::ObObj& start_pos,
const common::ObObj& length, common::ObExprCtx& expr_ctx) const;
int calc_result3_for_oracle(common::ObObj& result, const common::ObObj& text, const common::ObObj& start_pos,
const common::ObObj& length, common::ObExprCtx& expr_ctx) const;
int cast_param_type_for_mysql(const common::ObObj& in, common::ObExprCtx& expr_ctx, common::ObObj& out) const;
// disallow copy
DISALLOW_COPY_AND_ASSIGN(ObExprSubstr);
};
} // namespace sql
} // namespace oceanbase
#endif /* OCEANBASE_SQL_ENGINE_EXPR_SUBSTR_ */