92 lines
2.8 KiB
C++
92 lines
2.8 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_transaction_id.h"
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#include "sql/engine/ob_exec_context.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/ob_exec_context.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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ObExprTransactionId::ObExprTransactionId(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_TRANSACTION_ID, N_TRANSACTION_ID, 0, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprTransactionId::~ObExprTransactionId()
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{
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}
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int ObExprTransactionId::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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if (is_oracle_mode()) {
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const ObAccuracy &acc = ObAccuracy::DDL_DEFAULT_ACCURACY2[common::ORACLE_MODE][common::ObNumberType];
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type.set_number();
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type.set_scale(acc.get_scale());
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type.set_precision(acc.get_precision());
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} else {
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const ObAccuracy &acc = common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObUInt64Type];
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type.set_uint64();
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type.set_scale(acc.get_scale());
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type.set_precision(acc.get_precision());
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type.set_result_flag(NOT_NULL_FLAG);
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}
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return OB_SUCCESS;
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}
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int ObExprTransactionId::eval_transaction_id(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 ObSQLSessionInfo *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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const transaction::ObTxDesc *txdesc = session_info->get_tx_desc();
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const int64_t tx_id = txdesc ? txdesc->get_tx_id().get_id() : 0;
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if (ObUInt64Type == expr.datum_meta_.type_) { // mysql mode
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expr_datum.set_uint(tx_id);
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} else { // oracle mode
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ObNumStackOnceAlloc tmp_alloc;
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number::ObNumber num;
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if (OB_FAIL(num.from(tx_id, tmp_alloc))) {
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LOG_WARN("copy number fail", 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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}
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return ret;
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}
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int ObExprTransactionId::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_ = ObExprTransactionId::eval_transaction_id;
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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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