106 lines
3.1 KiB
C++
106 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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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/expr/ob_expr_bit_length.h"
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#include <string.h>
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#include "lib/oblog/ob_log.h"
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#include "share/object/ob_obj_cast.h"
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#include "objit/common/ob_item_type.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/expr/ob_expr_util.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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ObExprBitLength::ObExprBitLength(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_BIT_LENGTH, N_BIT_LENGTH, 1, NOT_ROW_DIMENSION)
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{
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}
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ObExprBitLength::~ObExprBitLength()
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{
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}
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int ObExprBitLength::calc_result_type1(ObExprResType &type, ObExprResType &text,
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ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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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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LOG_WARN("session is NULL", K(ret));
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} else {
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type.set_int();
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type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].scale_);
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type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
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text.set_calc_type(common::ObVarcharType);
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OX(ObExprOperator::calc_result_flag1(type, text));
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}
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return ret;
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}
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int ObExprBitLength::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
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{
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UNUSED(op_cg_ctx);
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UNUSED(raw_expr);
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int ret = OB_SUCCESS;
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if (rt_expr.arg_cnt_ != 1) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("bit length expr should have one param", K(ret), K(rt_expr.arg_cnt_));
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} else if (OB_ISNULL(rt_expr.args_) || OB_ISNULL(rt_expr.args_[0])) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("children of bit length expr is null", K(ret), K(rt_expr.args_));
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} else {
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ObObjType text_type = rt_expr.args_[0]->datum_meta_.type_;
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ObObjTypeClass type_class = ob_obj_type_class(text_type);
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if (!ob_is_castable_type_class(type_class)) {
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rt_expr.eval_func_ = ObExprBitLength::calc_null;
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} else {
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CK(ObVarcharType == text_type);
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rt_expr.eval_func_ = ObExprBitLength::calc_bit_length;
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}
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}
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return ret;
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}
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int ObExprBitLength::calc_null(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
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{
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UNUSED(expr);
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UNUSED(ctx);
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expr_datum.set_null();
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return OB_SUCCESS;
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}
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int ObExprBitLength::calc_bit_length(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum *text_datum = NULL;
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if (OB_FAIL(expr.args_[0]->eval(ctx, text_datum))) {
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LOG_WARN("eval param value failed", K(ret));
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} else if (text_datum->is_null()) {
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expr_datum.set_null();
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} else {
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expr_datum.set_int(static_cast<int64_t>(text_datum->len_ * 8));
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}
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return ret;
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}
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}
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}
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