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 "sql/parser/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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namespace sql {
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ObExprHextoraw::ObExprHextoraw(ObIAllocator& alloc) : 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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int ObExprHextoraw::calc_result_type1(ObExprResType& type, ObExprResType& text, ObExprTypeCtx& type_ctx) const
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{
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UNUSED(type_ctx);
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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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common::ObObjType param_type = text.get_type();
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common::ObLength length = -1;
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const int64_t oracle_max_avail_len = 40;
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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_type(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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return common::OB_SUCCESS;
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}
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int ObExprHextoraw::calc_result1(common::ObObj& result, const ObObj& text, ObExprCtx& expr_ctx) const
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{
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int ret = OB_SUCCESS;
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if (OB_ISNULL(expr_ctx.calc_buf_)) {
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ret = OB_NOT_INIT;
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LOG_WARN("varchar buffer not init", K(ret));
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} else {
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EXPR_DEFINE_CAST_CTX(expr_ctx, CM_NONE);
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cast_ctx.expect_obj_collation_ = CS_TYPE_BINARY;
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if (OB_FAIL(ObHexUtils::hextoraw(text, cast_ctx, result))) {
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LOG_WARN("fail to calc", K(ret), K(text));
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} else if (OB_LIKELY(!result.is_null())) {
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result.set_collation(result_type_);
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}
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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(
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expr, *arg, expr.args_[0]->datum_meta_.type_, 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, 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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} // namespace sql
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} // namespace oceanbase
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