106 lines
3.4 KiB
C++
106 lines
3.4 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 <string.h>
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#include "objit/common/ob_item_type.h"
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#include "sql/engine/expr/ob_expr_hextoraw.h"
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#include "sql/engine/expr/ob_expr_unhex.h"
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#include "sql/engine/expr/ob_datum_cast.h"
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "share/object/ob_obj_cast.h"
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#include "lib/oblog/ob_log.h"
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#include "sql/session/ob_sql_session_info.h"
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using namespace oceanbase::common;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprHextoraw::ObExprHextoraw(ObIAllocator &alloc)
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: ObStringExprOperator(alloc, T_FUN_SYS_HEXTORAW, N_HEXTORAW, 1)
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{
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disable_operand_auto_cast();
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}
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ObExprHextoraw::~ObExprHextoraw()
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{
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}
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int ObExprHextoraw::calc_result_type1(ObExprResType &type, ObExprResType &text,
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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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common::ObObjType param_type = text.get_type();
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if (ob_is_text_tc(param_type)) {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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LOG_WARN("lob as param not support in hextoraw", K(ret), K(param_type));
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} else if (!ob_is_null(param_type)
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&& !ob_is_raw(param_type)
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&& !ob_is_string_tc(param_type)
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&& !ob_is_numeric_type(param_type)) {
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// TODO:@xiaofeng.lby, to support other param types of hextoraw
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ret = OB_ERR_INVALID_HEX_NUMBER;
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LOG_WARN("invalid hex number", K(ret), K(param_type), K(text));
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} else {
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common::ObLength length = -1;
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const int64_t oracle_max_avail_len = 40;
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type.set_collation_level(common::CS_LEVEL_NUMERIC);
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type.set_collation_type(common::CS_TYPE_BINARY);
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type.set_raw();
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if (ob_is_numeric_type(param_type)) {
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length = oracle_max_avail_len;//enough !
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} else if (ob_is_string_tc(param_type)) {
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length = text.get_length() / 2 + (text.get_length() % 2);
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}
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if (length <= 0 || length > common::OB_MAX_VARCHAR_LENGTH) {
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length = common::OB_MAX_VARCHAR_LENGTH;
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}
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type.set_length(length);
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}
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return ret;
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}
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int ObExprHextoraw::calc_hextoraw_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum *arg = NULL;
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if (OB_UNLIKELY(1 != expr.arg_cnt_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid arg cnt", K(ret), K(expr.arg_cnt_));
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} else if (OB_FAIL(expr.args_[0]->eval(ctx, arg))) {
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LOG_WARN("eval arg failed", K(ret));
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} else if (arg->is_null()) {
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res_datum.set_null();
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} else if (OB_FAIL(ObDatumHexUtils::hextoraw(expr, *arg, expr.args_[0]->datum_meta_.type_,
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expr.args_[0]->datum_meta_.cs_type_, ctx, res_datum))) {
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LOG_WARN("hextoraw failed", K(ret));
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}
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return ret;
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}
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int ObExprHextoraw::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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UNUSED(expr_cg_ctx);
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UNUSED(raw_expr);
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rt_expr.eval_func_ = calc_hextoraw_expr;
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return ret;
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}
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}
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}
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