119 lines
4.1 KiB
C++
119 lines
4.1 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_OB_EXPR_DATE_FORMAT_H_
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#define OCEANBASE_SQL_OB_EXPR_DATE_FORMAT_H_
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#include "lib/timezone/ob_time_convert.h"
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "sql/session/ob_sql_session_info.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 ObExprDateFormat : public ObStringExprOperator
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{
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public:
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explicit ObExprDateFormat(common::ObIAllocator &alloc);
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virtual ~ObExprDateFormat();
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virtual int calc_result_type2(ObExprResType &type,
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ObExprResType &date,
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ObExprResType &format,
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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_date_format(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int calc_date_format_invalid(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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virtual int is_valid_for_generated_column(const ObRawExpr*expr, const common::ObIArray<ObRawExpr *> &exprs, bool &is_valid) const;
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private:
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprDateFormat);
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static const int64_t OB_MAX_DATE_FORMAT_BUF_LEN = 1024;
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static void check_reset_status(common::ObExprCtx &expr_ctx, int &ret, common::ObObj &result);
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};
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inline int ObExprDateFormat::calc_result_type2(ObExprResType &type,
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ObExprResType &date,
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ObExprResType &format,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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UNUSED(date);
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UNUSED(format);
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int ret = common::OB_SUCCESS;
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// common::ObCollationType collation_connection = common::CS_TYPE_INVALID;
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type.set_varchar();
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type.set_collation_type(type_ctx.get_coll_type());
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type.set_collation_level(common::CS_LEVEL_COERCIBLE);
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type.set_length(DATETIME_MAX_LENGTH);
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date.set_calc_collation_type(type.get_collation_type());
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format.set_calc_collation_type(type.get_collation_type());
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if (OB_SUCC(ret)) {
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//for enum or set obj, we need calc type
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if (ob_is_enum_or_set_type(date.get_type())) {
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date.set_calc_type(common::ObVarcharType);
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} else if (ob_is_double_tc(date.get_type()) || ob_is_float_tc(date.get_type())) {
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date.set_calc_type(common::ObNumberType);
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}
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if (ob_is_enum_or_set_type(format.get_type())) {
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format.set_calc_type(common::ObVarcharType);
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}
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}
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return ret;
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}
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class ObExprGetFormat : public ObStringExprOperator
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{
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public:
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explicit ObExprGetFormat(common::ObIAllocator &alloc);
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virtual ~ObExprGetFormat();
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virtual int calc_result_type2(ObExprResType &type,
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ObExprResType &unit,
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ObExprResType &format,
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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_get_format(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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private:
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enum Format
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{
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FORMAT_EUR = 0,
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FORMAT_INTERNAL = 1,
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FORMAT_ISO = 2,
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FORMAT_JIS = 3,
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FORMAT_USA = 4,
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FORMAT_MAX = 5,
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};
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// disallow copy
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static const int64_t GET_FORMAT_MAX_LENGTH = 17;
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static const char* FORMAT_STR[FORMAT_MAX];
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static const char* DATE_FORMAT[FORMAT_MAX + 1];
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static const char* TIME_FORMAT[FORMAT_MAX + 1];
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static const char* DATETIME_FORMAT[FORMAT_MAX + 1];
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DISALLOW_COPY_AND_ASSIGN(ObExprGetFormat);
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};
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} //sql
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} //oceanbase
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#endif //OCEANBASE_SQL_OB_EXPR_DATE_FORMAT_H_
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