71 lines
2.0 KiB
C++
71 lines
2.0 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_not_exists.h"
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#include "common/row/ob_row_iterator.h"
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namespace oceanbase
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{
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using namespace common;
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namespace sql
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{
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ObExprNotExists::ObExprNotExists(ObIAllocator &alloc)
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: ObSubQueryRelationalExpr(alloc, T_OP_NOT_EXISTS, N_NOT_EXISTS, 1, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprNotExists::~ObExprNotExists()
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{
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}
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int ObExprNotExists::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(!type1.is_int())) {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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} else {
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type.set_int32();
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type.set_result_flag(NOT_NULL_FLAG);
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type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
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type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
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}
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return ret;
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}
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int ObExprNotExists::cg_expr(ObExprCGCtx &, const ObRawExpr &, ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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CK(1 == rt_expr.arg_cnt_);
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rt_expr.eval_func_ = ¬_exists_eval;
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return ret;
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};
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int ObExprNotExists::not_exists_eval(
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const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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bool exists = false;
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if (OB_FAIL(check_exists(expr, ctx, exists))) {
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LOG_WARN("check exists failed", K(ret));
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} else {
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expr_datum.set_bool(!exists);
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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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