119 lines
3.9 KiB
C++
119 lines
3.9 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_des_hex_str.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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{
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using namespace oceanbase::common;
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namespace sql
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{
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ObExprDesHexStr::ObExprDesHexStr(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_DES_HEX_STR, N_DES_HEX_STR, 1, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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int ObExprDesHexStr::calc_result_type1(ObExprResType &type, ObExprResType &type1,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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int ret = common::OB_SUCCESS;
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if (!type1.is_varchar()) {
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ret = common::OB_INVALID_ARGUMENT;
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LOG_WARN("invalid type1 argument.", K(ret), K(type1));
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} else {
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type.set_varchar();
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type.set_collation_level(type1.get_collation_level());
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type.set_collation_type(type1.get_collation_type());
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type.set_scale(type1.get_scale());
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}
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return ret;
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}
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int ObExprDesHexStr::deserialize_hex_cstr(const char *buf,
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int64_t buf_len,
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common::ObExprStringBuf &string_buf,
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common::ObObj &obj)
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{
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int ret = common::OB_SUCCESS;
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int64_t pos = 0;
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int64_t ret_len = 0;
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char *res_buf = NULL;
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if (OB_ISNULL(buf) || buf_len < 0) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid arguments.", K(ret), K(buf_len));
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} else if (NULL == (res_buf = static_cast<char*>(string_buf.alloc(buf_len)))) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_ERROR("fail to allocate memory for res_buf.", K(ret), K(buf_len));
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} else if (buf_len != (ret_len = common::str_to_hex(buf,
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static_cast<int32_t>(buf_len),
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res_buf,
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static_cast<int32_t>(buf_len)))) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("transfer str to hex failed.",
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K(ret), K(buf), K(buf_len), K(ret_len));
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} else if (OB_FAIL(obj.deserialize(res_buf, ret_len/2, pos))) {
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LOG_WARN("deserialize obj failed.",
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K(ret), K(buf), K(buf_len), K(pos));
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}
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return ret;
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}
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int ObExprDesHexStr::cg_expr(ObExprCGCtx &, const ObRawExpr &, ObExpr &expr) const
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{
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int ret = OB_SUCCESS;
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CK(1 == expr.arg_cnt_);
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expr.eval_func_ = eval_des_hex_str;
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return ret;
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}
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int ObExprDesHexStr::eval_des_hex_str(
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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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ObDatum *in= NULL;
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ObEvalCtx::TempAllocGuard alloc_guard(ctx);
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ObIAllocator &alloc = alloc_guard.get_allocator();
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ObObj obj;
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if (OB_FAIL(expr.eval_param_value(ctx, in))) {
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LOG_WARN("evaluate parameter failed", K(ret));
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} else if (in->is_null()) {
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expr_datum.set_null();
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} else if (OB_FAIL(deserialize_hex_cstr(in->ptr_, in->len_, alloc, obj))) {
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LOG_WARN("unhex or deserialize failed", K(ret));
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} else {
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const int64_t len = std::max(128, in->len_ * 2);
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char *buf = expr.get_str_res_mem(ctx, len);
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int64_t pos = 0;
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if (OB_ISNULL(buf)) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_WARN("allocate memory failed", K(ret));
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} else if (OB_FAIL(obj.print_plain_str_literal(buf, len, pos))) {
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LOG_WARN("print sql literal failed", K(ret), K(obj));
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} else {
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expr_datum.set_string(buf, pos);
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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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