99 lines
3.2 KiB
C++
99 lines
3.2 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_last_insert_id.h"
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#include "sql/engine/ob_physical_plan_ctx.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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ObExprLastInsertID::ObExprLastInsertID(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_LAST_INSERT_ID, N_LAST_INSERT_ID, ZERO_OR_ONE, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprLastInsertID::~ObExprLastInsertID()
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{
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}
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int ObExprLastInsertID::calc_result_typeN(ObExprResType &type,
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ObExprResType *types_array,
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int64_t param_num,
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ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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UNUSED(types_array);
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UNUSED(param_num);
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type.set_uint64();
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type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObUInt64Type].scale_);
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type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObUInt64Type].precision_);
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type.set_result_flag(NOT_NULL_FLAG);
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if (1 == param_num) {
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const ObObjType arg_type = types_array[0].get_type();
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if (ob_is_int_tc(arg_type) || ob_is_uint_tc(arg_type)) {
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// get the uint value directly without extra cast
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} else if (ob_is_number_tc(arg_type)) {
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types_array[0].set_calc_type(ObIntType);
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} else {
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types_array[0].set_calc_type(ObUInt64Type);
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}
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}
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return OB_SUCCESS;
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}
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int ObExprLastInsertID::cg_expr(ObExprCGCtx &, const ObRawExpr &, ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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rt_expr.eval_func_ = &eval_last_insert_id;
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return ret;
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}
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int ObExprLastInsertID::eval_last_insert_id(
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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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ObPhysicalPlanCtx *plan_ctx = ctx.exec_ctx_.get_physical_plan_ctx();
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ObSQLSessionInfo *session = ctx.exec_ctx_.get_my_session();
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ObDatum *arg = NULL;
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if (NULL == plan_ctx || NULL == session) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("phy plan context or session is NULL", K(ret), K(plan_ctx), K(session));
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} else if (OB_FAIL(expr.eval_param_value(ctx, arg))) {
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LOG_WARN("evaluate parameter failed", K(ret));
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} else {
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if (0 == expr.arg_cnt_) {
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expr_datum.set_uint(session->get_local_last_insert_id());
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} else if (1 == expr.arg_cnt_) {
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plan_ctx->set_last_insert_id_with_expr(true);
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plan_ctx->set_last_insert_id_changed(true);
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if (arg->is_null()) {
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expr_datum.set_null();
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plan_ctx->set_last_insert_id_session(0);
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} else {
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expr_datum.set_uint(arg->get_uint());
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plan_ctx->set_last_insert_id_session(arg->get_uint());
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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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}
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}
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