103 lines
3.0 KiB
C++
103 lines
3.0 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_seq_nextval.h"
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#include "lib/mysqlclient/ob_mysql_result.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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#include "sql/engine/expr/ob_expr_util.h"
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namespace oceanbase
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{
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using namespace common;
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using namespace share;
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namespace sql
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{
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ObExprSeqNextval::ObExprSeqNextval(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_SEQ_NEXTVAL, N_SEQ_NEXTVAL, 1, NOT_ROW_DIMENSION,
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INTERNAL_IN_MYSQL_MODE, INTERNAL_IN_ORACLE_MODE)
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{
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}
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ObExprSeqNextval::~ObExprSeqNextval()
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{
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}
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int ObExprSeqNextval::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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if (!type1.is_uint64()) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("input param should be uint64_t type", K(type1), K(ret));
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} else {
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type.set_number();
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type.set_scale(0);
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type.set_precision(OB_MAX_NUMBER_PRECISION);
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type.set_result_flag(NOT_NULL_FLAG);
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}
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return ret;
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}
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int ObExprSeqNextval::cg_expr(
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ObExprCGCtx &expr_cg_ctx,
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const ObRawExpr &raw_expr,
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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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if (OB_UNLIKELY(1 != rt_expr.arg_cnt_)) {
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ret = OB_INVALID_ARGUMENT_NUM;
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LOG_WARN("invalid arg num", K(ret), K(rt_expr.arg_cnt_));
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} else {
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rt_expr.eval_func_ = calc_sequence_nextval;
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}
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return ret;
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}
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int ObExprSeqNextval::calc_sequence_nextval(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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int ret = OB_SUCCESS;
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ObDatum *arg_datum = nullptr;
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if (OB_FAIL(expr.args_[0]->eval(ctx, arg_datum))) {
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LOG_WARN("failed to eval expr", K(ret));
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} else {
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ObSQLSessionInfo *session = ctx.exec_ctx_.get_my_session();
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common::number::ObNumber num;
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ObNumStackOnceAlloc tmp_alloc;
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uint64_t tenant_id = session->get_effective_tenant_id();
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int64_t seq_id = arg_datum->get_int();
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ObSequenceValue value;
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if (OB_FAIL(session->get_sequence_value(tenant_id, seq_id, value))) {
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LOG_WARN("failed to get sequence value from session",
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K(tenant_id), K(seq_id), K(ret));
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} else if (OB_FAIL(num.from(value.val(), tmp_alloc))) {
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LOG_WARN("fail deep copy value", K(ret));
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} else {
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res.set_number(num);
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}
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LOG_DEBUG("trace sequence nextval", K(num), K(ret));
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}
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return ret;
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}
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}//end namespace sql
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}//end namespace oceanbase
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