82 lines
3.1 KiB
C++
82 lines
3.1 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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namespace sql {
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class ObExprDateFormat : public ObStringExprOperator {
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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(
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ObExprResType& type, ObExprResType& date, ObExprResType& format, common::ObExprTypeCtx& type_ctx) const;
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virtual int calc_result2(
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common::ObObj& result, const common::ObObj& date, const common::ObObj& format, common::ObExprCtx& expr_ctx) const;
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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 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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private:
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprDateFormat);
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static int set_cur_date(const common::ObTimeZoneInfo* tz_info, common::ObTime& ob_time);
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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(
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ObExprResType& type, ObExprResType& date, ObExprResType& format, 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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const ObSQLSessionInfo* session = type_ctx.get_session();
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if (OB_ISNULL(session)) {
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ret = OB_ERR_UNEXPECTED;
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} else if (session->use_static_typing_engine()) {
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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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}
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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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} // namespace sql
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} // namespace oceanbase
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#endif // OCEANBASE_SQL_OB_EXPR_DATE_FORMAT_H_
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