66 lines
2.4 KiB
C++
66 lines
2.4 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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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/expr/ob_expr_subquery_equal.h"
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#include "common/object/ob_obj_compare.h"
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#include "sql/engine/expr/ob_expr_equal.h"
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#include "sql/engine/expr/ob_expr_result_type_util.h"
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#include "sql/session/ob_sql_session_info.h"
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namespace oceanbase {
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using namespace common;
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namespace sql {
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ObExprSubQueryEqual::ObExprSubQueryEqual(ObIAllocator& alloc)
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: ObSubQueryRelationalExpr(alloc, T_OP_SQ_EQ, N_SQ_EQUAL, 2, NOT_ROW_DIMENSION)
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{}
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ObExprSubQueryEqual::~ObExprSubQueryEqual()
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{}
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int ObExprSubQueryEqual::compare_single_row(
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const ObNewRow& left_row, const ObNewRow& right_row, ObExprCtx& expr_ctx, ObObj& result) const
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{
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int ret = OB_SUCCESS;
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bool cnt_null = false;
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if (OB_UNLIKELY(left_row.get_count() != right_row.get_count())) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("right and left row is not equal", K(ret));
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} else {
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const ObIArray<ObExprCalcType>& cmp_types = result_type_.get_row_calc_cmp_types();
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ObCompareCtx cmp_ctx(ObMaxType, CS_TYPE_INVALID, false, expr_ctx.tz_offset_, default_null_pos());
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EXPR_DEFINE_CAST_CTX(expr_ctx, CM_WARN_ON_FAIL);
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for (int64_t i = 0; OB_SUCC(ret) && i < left_row.get_count(); ++i) {
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const ObObj& left_param = left_row.get_cell(i);
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const ObObj& right_param = right_row.get_cell(i);
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cmp_ctx.cmp_type_ = cmp_types.at(i).get_type();
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cmp_ctx.cmp_cs_type_ = cmp_types.at(i).get_collation_type();
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if (OB_FAIL(ObExprEqual::calc(result, left_param, right_param, cmp_ctx, cast_ctx))) {
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LOG_WARN("Compare expression failed", K(ret));
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} else if (result.is_false()) {
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break;
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} else if (result.is_null()) {
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cnt_null = true;
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}
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LOG_TRACE("hualong debug", K(result), "class", result.get_type());
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}
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if (OB_SUCC(ret) && cnt_null && result.is_true()) {
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result.set_null();
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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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