147 lines
5.5 KiB
C++
147 lines
5.5 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_tablet_autoinc_nextval.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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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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ObExprTabletAutoincNextval::ObExprTabletAutoincNextval(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_TABLET_AUTOINC_NEXTVAL, N_TABLET_AUTOINC_NEXTVAL, 0, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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disable_operand_auto_cast();
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}
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ObExprTabletAutoincNextval::~ObExprTabletAutoincNextval()
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{
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}
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int ObExprTabletAutoincNextval::calc_result_type0(ObExprResType &type,
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common::ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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UNUSED(type_ctx);
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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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return ret;
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}
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int ObExprTabletAutoincNextval::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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int ret = OB_SUCCESS;
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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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CK(NULL != type_ctx.get_session());
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if (OB_SUCC(ret)) {
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CK(types_array[0].is_uint64());
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if (OB_SUCC(ret) && 2 == param_num) {
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// column_conv() is add before nextval() in static tying engine. Parameter 2 is converted
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// to defined type, only uint/int allowed.
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ObObjTypeClass tc = ob_obj_type_class(type.get_type());
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if (!(ObNullTC == tc || ObIntTC == tc || ObUIntTC == tc)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("only int/uint type class supported for tablet auto_increment column",
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K(ret));
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} else {
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static_cast<ObObjMeta &>(type) = types_array[1];
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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 ObExprTabletAutoincNextval::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_nextval;
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return ret;
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}
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int ObExprTabletAutoincNextval::eval_nextval(
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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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UNUSED(expr);
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UNUSED(ctx);
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expr_datum.set_null();
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// ObDatum *col_id = NULL;
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// ObDatum *tablet_id_datum = NULL; // TODO(shuangcan): currently it is partition id
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// ObPhysicalPlanCtx *plan_ctx = ctx.exec_ctx_.get_physical_plan_ctx();
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// ObSQLSessionInfo *my_session = ctx.exec_ctx_.get_my_session();
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// if (OB_ISNULL(plan_ctx) || OB_ISNULL(my_session)) {
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// ret = OB_ERR_UNEXPECTED;
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// LOG_WARN("no phy plan context", K(ret));
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// } else if (OB_FAIL(expr.eval_param_value(ctx, col_id, tablet_id_datum))) {
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// LOG_WARN("evaluate parameter failed", K(ret));
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// } else if (col_id->is_null() || tablet_id_datum->is_null()) {
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// ret = OB_ERR_UNEXPECTED;
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// LOG_WARN("id is null", K(ret));
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// } else {
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// // TODO(shuangcan): add logic to calculate tablet seq
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// ObTabletAutoincrementService &auto_service = ObTabletAutoincrementService::get_instance();
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// ObTabletAutoincParam &autoinc_param = plan_ctx->get_tablet_autoinc_param();
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// // common::ObTabletID tablet_id(tablet_id_datum->get_int());
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// common::ObTabletID tablet_id(1); // TODO(shuangcan): change to calc real tablet id
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// ObTabletCacheInterval &interval = autoinc_param.cache_interval_;
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// if (interval.tablet_id_ != tablet_id) {
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// if (OB_FAIL(auto_service.get_tablet_cache_interval(autoinc_param, tablet_id, interval))) {
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// if (OB_EAGAIN == ret) {
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// if (OB_FAIL(auto_service.get_tablet_cache_interval(autoinc_param, tablet_id, interval))) {
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// LOG_WARN("failed to get auto_increment handle", K(ret));
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// }
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// } else {
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// LOG_WARN("failed to get auto_increment handle", K(ret));
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// }
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// }
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// }
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// uint64_t value = 0;
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// if (OB_SUCC(ret)) {
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// // get auto-increment value
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// if (OB_FAIL(interval.next_value(value))) {
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// if (OB_EAGAIN == ret) {
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// if (OB_FAIL(auto_service.get_tablet_cache_interval(autoinc_param, tablet_id, interval))) {
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// LOG_WARN("failed to get auto_increment handle", K(ret));
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// } else if (OB_FAIL(interval.next_value(value))) {
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// LOG_WARN("failed to get next auto increment value", K(ret), K(interval));
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// } else {
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// expr_datum.set_int(value);
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// }
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// } else {
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// LOG_WARN("failed to get next auto increment value", K(ret), K(interval));
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// }
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// } else {
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// expr_datum.set_int(value);
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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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}//end namespace sql
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}//end namespace oceanbase
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