90 lines
2.5 KiB
C++
90 lines
2.5 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_uid.h"
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#include "sql/engine/ob_physical_plan_ctx.h"
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#include "lib/mysqlclient/ob_mysql_result.h"
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#include "lib/mysqlclient/ob_mysql_transaction.h"
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#include "lib/string/ob_sql_string.h"
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#include "lib/mysqlclient/ob_mysql_proxy.h"
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#include "lib/oblog/ob_log_module.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "share/schema/ob_schema_getter_guard.h"
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#include "sql/engine/ob_exec_context.h"
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprUid::ObExprUid(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_UID, N_UID, 0, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprUid::~ObExprUid()
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{
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}
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int ObExprUid::calc_result_type0(ObExprResType &type,
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ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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if (lib::is_oracle_mode()) {
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type.set_number();
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type.set_precision(PRECISION_UNKNOWN_YET);
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type.set_scale(ORA_NUMBER_SCALE_UNKNOWN_YET);
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} else {
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type.set_uint64();
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}
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return OB_SUCCESS;
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}
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int ObExprUid::eval_uid(const ObExpr &expr, ObEvalCtx &ctx,
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ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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UNUSED(expr);
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const ObBasicSessionInfo *session_info = NULL;
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if (OB_ISNULL(session_info = ctx.exec_ctx_.get_my_session())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("session info is null", K(ret));
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} else {
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char local_buff[number::ObNumber::MAX_BYTE_LEN];
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ObDataBuffer local_alloc(local_buff, number::ObNumber::MAX_BYTE_LEN);
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number::ObNumber num;
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if (OB_FAIL(num.from(session_info->get_user_id(), local_alloc))) {
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LOG_WARN("failed to convert int to number", K(ret));
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} else {
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expr_datum.set_number(num);
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}
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}
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return ret;
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}
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int ObExprUid::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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UNUSED(raw_expr);
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UNUSED(op_cg_ctx);
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rt_expr.eval_func_ = ObExprUid::eval_uid;
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return OB_SUCCESS;
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}
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}/* ns sql*/
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}/* ns oceanbase */
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