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数仓实时场景下表行数估算不准确引起的的性能瓶颈问题案例

  • 2023-10-24
    广东
  • 本文字数:25724 字

    阅读完需:约 84 分钟

数仓实时场景下表行数估算不准确引起的的性能瓶颈问题案例

本文分享自华为云社区《GaussDB(DWS)性能调优:实时场景下表行数估算不准确引起的的性能瓶颈问题案例》,作者: O 泡果奶~。


本文针对实时场景下 SQL 语句因表行数估算不准确而导致语句执行超时报错的案例进行分析。

1、【问题描述】


实时场景下,select 查询语句执行时间过长,该语句 verbose 执行计划中存在 nestloop,且使用 hint(set (enable_index_nestloop off)) 无法生效。

2、【原始语句】


select * from ( select        wo.work_order_id /*工单id*/,        wo.work_order_code /*工单编码*/,        wo.work_order_name /*工单名称*/,        wo.work_order_level /*工单层级(第一层级(未拆分工单/父工单):1,第二层级(子工单):10)*/,        decode(wo.work_order_level,1, '第一层级(未拆分工单/父工单)', 10,'第二层级(子工单)') as work_order_level_desc /*工单层级描述*/,        substrb(wo.wo_description, 1, 1000) as wo_description /*工单描述*/,        wo.wo_version /*工单版本号*/,        wo.wo_lifecycle_status /*生命周期标识:0:正常工单,-1: 已删除*/,        wo.business_id /*工单来源业务id*/,        wo.business_type /*工单来源业务类型(10:活动流工单 20:手工派单 30:拆单工单 40:临时mos工单 50:ihub工单 60:ipmo工单 70:wbs工单 80:ncs工单 90:hr工单 100:ls工单 默认10)*/,        decode( wo.business_type, '10', '活动流工单', '20', '手工派单', '30', '拆单工单', '40', '临时MOS工单', '50', 'ihub工单', '60',  'ipmo工单',				                          '70', 'WBS工单', '80', 'NCS工单', '90', 'HR工单', '100', 'LS工单' ) as business_type_desc /*工单来源业务类型描述*/,        wo.parent_activity_id /*父节点活动id*/,        wo.activity_lib_id /*活动库活动id*/,        wo.activity_type /*作业类型,1wbs,2活动,3里程碑*/,        ac.activity_name  /*活动名称*/,        ac.std_ms_code as standard_ms_code  /*标准里程碑编码*/,        wo.plan_id /*计划id*/,        wo.project_number as proj_num  /*项目编码*/,        wo.du_id  /*交付单元id*/,        wo.duration  /*工期*/,        wo.billing_flag /*开票标识:y-开票*/,        wo.na_flag  /*na标识*/,        wo.inv_flag   /*inv标识*/,        wo.master_flag   /*拆分标示,n:未拆分 ; y:已拆分*/,        wo.created_by as created_by_id  /*创建人user id*/,        u1.lname as created_by  /*创建人*/,        wo.creation_date   /*创建时间*/,        wo.last_updated_by as last_updated_by_id   /*最后更新人user id*/,        u2.lname as last_updated_by  /*最后更新人*/,        wo.last_update_date   /*最后更新时间*/,        wp.wo_progress_id  /*活动进度id*/,        wp.expect_start_date  /*预期开始日期*/,        wp.expect_end_date  /*预期结束日期*/,        wp.plan_start_time  /*计划开始时间*/,        wp.plan_end_time /*计划完成时间*/,        wp.actual_start_time  /*实际开始时间*/,        wp.actual_end_time  /*实际完成时间*/,        wp.close_time  /*活动关闭时间*/,        wp.completion_rate   /*完工比率(数值如 0.8666)*/,        to_char(substr(wp.remark, 1, 333)) as progress_description   /*进度备注信息*/,        wp.total_value  /*总值*/,        wp.accumulate_value  /*累计值*/,        wp.report_time  /*值反馈时间*/,        wp.total_plan_value  /*总计划值*/,        wp.ehs_risk  /*高危活动类型*/,        wp.delay_reason_id   /*延迟原因id*/,        substrb(ag.description, 1, 1000) as delay_reason_description  /*延迟原因描述*/,        wp.wo_status  /*活动状态  psc_lookup_item_t_3220 classify_code = 'WO_STATUS_CODE'*/,        l2.item_name as wo_status_desc /*活动状态描述*/,(          case            when lengthb(wp.approve_status) = 0 then null            else wp.approve_status          end        ) :: number as approve_status   /*审批状态  psc_lookup_item_t_3220 classify_code = 'WORK_ORDER_APPROVE_STATUS'*/,        l3.item_name as approve_status_desc   /*审批状态描述*/,        wp.par_workorder_doc_flag  /*父工单是否有交付件(y/n)*/,        wp.deliverables_complete   /*交付件上传状态 0:不涉及交付件 1:待上传交付件 2:交付件上传中,未上传完9:交付件已上传完*/,        wp.revenue_trigger_status   /*触发状态(0:未触发过  1:已触发   2:已触发,pc校验触发失败  3:pc触发成功)*/,        wp.billing_status   /*开票状态(空值:未触发过  1:已开票)*/,        wp.frozen_flag  /*冻结标识(y/n)*/,        wp.mr_frozen_flag   /*mr是否冻结站点要货通过更新实施计划刷新字段*/,        wp.mr_status  /*站点签状态 1未签收,2部分签收,3全部签收,10未签收,20部分签收,30全部签收,40部分超配置签收,50全部超配置签收  完工验状态 p:部分完成,f:全部完成*/,        wp.tool_flag  /*是否挂工具工单回写(y/n)*/,        wp.split_cp_flag   /*拆分施工计划标识 y已拆分 n未拆分*/,        wp.mos_data_source  /*站点签完工验状数据来源*/,        wo.template_id  /*模板id,例如活动流节点id*/,        tfn.task_flow_id  /*任务流id*/,        tfn.task_flow_node_id /*活动流节点id*/,        tfn.revenue_flag /*收入里程碑标识(y/n)*/,        tfn.on_site  /*是否现场*/,        nvl(l1.item_name, tfn.owner_type) as owner_type  /*责任方类型 客户/华为/分包商*/,        tfn.subcon        /*是否分包*/        /*产品域*/,case          when wo.enable_flag = 'Y'          and wp.enable_flag = 'Y'          and wo.wo_lifecycle_status = 0          and nvl(du.enable_flag, 'Y') = 'Y' then 'Y'          else 'N'        end as enable_flag   /*有效标识,y为有效n为失效*/,        'N' as del_flag  /*删除标识 y为已删除*/,        3 as data_center_id  /*数据中心id*/,        tf.task_flow_code   /*活动流编码 add by jwx528041 20200408*/,        tfn.task_flow_node_code  /*任务流节点编码 add by jwx528041 20200408*/,        tfn.task_flow_node_name  /*任务流节点名称 add by jwx528041 20200408*/,        tfn.task_flow_node_type  /*任务流节点类型 add by jwx528041 20200408*/,        tfn.enable_flag as flow_enable_flag  /*活动流有效标识 add by jwx528041 20200408*/,        wo.tenant_code   /*租户编码 add by jwx528041 20200408*/,        tfn.activity_id  /*活动流水号 add by jwx528041 20200408*/,        tfn.lead_time  /*持续时间  add by jwx528041 20200408*/,        wo.resource_id as wo_actual_owner_id   /*工单实际责任人id update by swx949890 202207*/,        wo.resource_name as wo_actual_owner  /*工单实际责任人 update by swx949890 202207*/,        wo.contractor_id as wo_actual_owner_contr_id  /*工单实际责任人分包商id update by swx949890 202207*/,        wo.contractor_name as wo_actual_owner_contr_name  /*工单实际责任人分包商名称 update by swx949890 202207*/,        nvl(l4.item_name, tfn.delivery_model) as delivery_model  /*工单交付模式 add by cwx613468 20200711*/,        tfn.on_line_site  /*是否上站 add by cwx613468 20200711*/,        u3.lname as dispatcher_user_name   /*调度人 add by cwx613468 20200711*/,        tfn.approve_level_qty  /*审批总层级 add by jwx528041 20200819*/,        tf.task_flow_name   /*活动流名称 add by jwx528041 20200819*/,        tf.task_flow_type   /*活动流类型 add by jwx528041 20200819*/,        wp.source_code   /*标识actual时间的修改来源,值为mobile标识从手机端回写 add by jwx528041 20200819*/,        wp.plan_updated_by   /*实际开始时间更新人user id add by jwx528041 20200819*/,        wp.plan_update_time  /*计划时间更新时间  add by jwx528041 20200819*/,        wp.dispatch_time  /*调度时间  add by jwx528041 20200819*/,        wp.first_actual_update_time   /*第一次实际开始时间填入时间  add by jwx528041 20200819*/,        wp.first_actual_end_time   /*第一次实际结束时间填入时间  add by jwx528041 20200819*/,        wp.first_actual_updated_by    /*第一次实际时间填入人user id add by jwx528041 20200819*/,        wp.actual_start_update_time   /*实际开始时间更新日期 add by jwx528041 20200819*/,        wp.actual_start_updated_by   /*实际开始时间更新人user id add by jwx528041 20200819*/,        wp.actual_time_source  /*实际完成时间更新来源 add by jwx528041 20200819*/,        wp.actual_end_update_time /*实际完成时间更新日期 add by jwx528041 20200819*/,        wp.actual_end_updated_by /*实际完成时间更新人user id add by jwx528041 20200819*/,        wp.revenue_trigger_failed_msg        /*收入触发失败原因 add by jwx528041 20200819*/,        ag.souce_type as delay_reason_souce_type  /*延迟原因数据来源:1、自定义 2、 add by jwx528041 20200819*/				 --,ras.tree_type    as wo_owner_tree_type    /*工单责任人项目树节点类型tree_type add by jwx528041 20200819*/ 				 ,        wo.tree_type as wo_owner_tree_type /*工单责任人项目树节点类型tree_type update by swx949890 202207*/,        dr.resouce_type as wo_owner_resouce_type /*工单责任人资源类型 add by jwx528041 20200819*/,        l5.item_name as wo_owner_resouce_type_desc /*工单责任人资源类型 add by jwx528041 20200819*/,        u4.w3_account as wo_owner_w3_account /*工单责任人w3账号  add by jwx528041 20200819*/,        rel.du_tf_rel_enable /*du与活动流关系有效性标识 y:有效 n:失效  add by lwx617215 20210116*/,        t.billing_sla /*sla*/,        t.billing_milestone /*开票里程碑*/,        tf.required_tools,        wp.active,        gp.plan_code,        gp.plan_name,        gp.template_plan_id      from        sdisd.ogg_wo_work_order_2_3220 wo        inner join sdisd.ogg_wo_progress_2_3220 wp on wo.work_order_id = wp.work_order_id        left join sdisd.ogg_wo_task_flow_node_br_3220 tfn on wo.template_id = tfn.task_flow_node_id        and nvl(wo.wo_version, 0) = case          when nvl(wo.wo_version, 0) > 0 then tfn.version          else tfn.wo_version        end        and wo.project_number = tfn.project_number        left join sdisd.ogg_sds_activity_t_br_3220 ac on wo.activity_lib_id = ac.activity_id        left join sdisd.ogg_sds_task_flow_t_br_3220 tf on tfn.task_flow_id = tf.task_flow_id        left join sdisd.ogg_du_release_t_br_3220 du        /*enable_flag新增有效du的判断 lwx617215 20210116*/        on wo.du_id = du.du_id        left join sdisd.ogg_gcc_plan_2_3220 gp --dwx1189869        on wo.plan_id = gp.plan_id        and gp.tenant_code = 'RolloutPlan'        and gp.parent_plan_id = -1        and gp.enable_flag = 'Y'        left join (          select            r.du_id,            r.task_flow_id,            /*du与活动流有效标识*/            case              when r.enable_flag = 'Y'              and publish_flag = 'P' then 'Y'              else 'N'            end as du_tf_rel_enable,            row_number() over(              partition by r.du_id,              r.task_flow_id              order by                r.last_update_date desc            ) as rn          from            sdisd.ogg_rp_du_tf_release_3_3220 r        ) rel on wo.du_id = rel.du_id        and tfn.task_flow_id = rel.task_flow_id        and rel.rn = 1        left join sdisd.ogg_tpl_user_t_3220 u1 on wo.created_by = u1.user_id        left join sdisd.ogg_tpl_user_t_3220 u2 on wo.last_updated_by = u2.user_id        left join sdisd.ogg_tpl_user_t_3220 u3 on wp.dispatcher_user_id = u3.user_id        left join sdisd.ogg_sds_activity_gap_t_br_3220 ag on wp.delay_reason_id = ag.activity_gap_id        left join sdisd.ogg_tpl_lookup_item_t_3220 l1 on tfn.owner_type = l1.item_code        and l1.classify_code = 'SDS_TASK_OWNER_TYPE'        and l1.language = 'en_US'        left join sdisd.ogg_psc_lookup_item_t_3220 l2 on wp.wo_status = l2.item_code        and l2.classify_code = 'WO_STATUS_CODE'        and l2.language = 'en_US'        left join sdisd.ogg_psc_lookup_item_t_3220 l3 on wp.approve_status = l3.item_code        and l3.classify_code = 'WORK_ORDER_APPROVE_STATUS'        and l3.language = 'en_US'        left join sdisd.ogg_tpl_lookup_item_t_3220 l4 on tfn.delivery_model = l4.item_code        and l4.classify_code = 'SDS_TASK_ON_SITE'        and l4.language = 'en_US'        left join sdisd.ogg_pm_project_tree_node_3220 tn on wo.resource_id = tn.tree_id        left join sdisd.ogg_pm_delivery_resource_3220 dr on tn.resource_id = dr.resource_id        left join sdisd.ogg_tpl_user_t_3220 u4 on dr.user_id = u4.user_id        left join sdisd.ogg_tpl_lookup_item_t_3220 l5 on dr.resouce_type = l5.item_code        and l5.classify_code = 'PM_RESOURCE_TYPE'        and l5.language = 'zh_CN'        left join sdisd.ogg_sds_task_flow_node_br_3220 t on tfn.task_flow_node_id = t.task_flow_node_id      where        (          wo.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or wp.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or tfn.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or ag.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60        )  union all      select        wo.work_order_id        /*工单id*/,        wo.work_order_code        /*工单编码*/,        wo.work_order_name        /*工单名称*/,        wo.work_order_level        /*工单层级(第一层级(未拆分工单/父工单):1,第二层级(子工单):10)*/,        decode(          wo.work_order_level,          1,          '第一层级(未拆分工单/父工单)',          10,          '第二层级(子工单)'        ) as work_order_level_desc        /*工单层级描述*/,        substrb(wo.wo_description, 1, 1000) as wo_description        /*工单描述*/,        wo.wo_version        /*工单版本号*/,        wo.wo_lifecycle_status        /*生命周期标识:0:正常工单,-1: 已删除*/,        wo.business_id        /*工单来源业务id*/,        wo.business_type        /*工单来源业务类型(10:活动流工单 20:手工派单 30:拆单工单 40:临时mos工单 50:ihub工单 60:ipmo工单 70:wbs工单 80:ncs工单 90:hr工单 100:ls工单 默认10)*/,        decode(          wo.business_type,          '10',          '活动流工单',          '20',          '手工派单',          '30',          '拆单工单',          '40',          '临时MOS工单',          '50',          'ihub工单',          '60',          'ipmo工单',          '70',          'WBS工单',          '80',          'NCS工单',          '90',          'HR工单',          '100',          'LS工单'        ) as business_type_desc        /*工单来源业务类型描述*/,        wo.parent_activity_id        /*父节点活动id*/,        wo.activity_lib_id        /*活动库活动id*/,        wo.activity_type        /*作业类型,1wbs,2活动,3里程碑*/,        ac.activity_name        /*活动名称*/,        ac.std_ms_code as standard_ms_code        /*标准里程碑编码*/,        wo.plan_id        /*计划id*/,        wo.project_number as proj_num        /*项目编码*/,        wo.du_id        /*交付单元id*/,        wo.duration        /*工期*/,        wo.billing_flag        /*开票标识:y-开票*/,        wo.na_flag        /*na标识*/,        wo.inv_flag        /*inv标识*/,        wo.master_flag        /*拆分标示,n:未拆分 ; y:已拆分*/,        wo.created_by as created_by_id        /*创建人user id*/,        u1.lname as created_by        /*创建人*/,        wo.creation_date        /*创建时间*/,        wo.last_updated_by as last_updated_by_id        /*最后更新人user id*/,        u2.lname as last_updated_by        /*最后更新人*/,        wo.last_update_date        /*最后更新时间*/,        wp.wo_progress_id        /*活动进度id*/,        wp.expect_start_date        /*预期开始日期*/,        wp.expect_end_date        /*预期结束日期*/,        wp.plan_start_time        /*计划开始时间*/,        wp.plan_end_time        /*计划完成时间*/,        wp.actual_start_time        /*实际开始时间*/,        wp.actual_end_time        /*实际完成时间*/,        wp.close_time        /*活动关闭时间*/,        wp.completion_rate        /*完工比率(数值如 0.8666)*/,        to_char(substr(wp.remark, 1, 333)) as progress_description        /*进度备注信息*/,        wp.total_value        /*总值*/,        wp.accumulate_value        /*累计值*/,        wp.report_time        /*值反馈时间*/,        wp.total_plan_value        /*总计划值*/,        wp.ehs_risk        /*高危活动类型*/,        wp.delay_reason_id        /*延迟原因id*/,        substrb(ag.description, 1, 1000) as delay_reason_description        /*延迟原因描述*/,        wp.wo_status        /*活动状态  psc_lookup_item_t_3220 classify_code = 'WO_STATUS_CODE'*/,        l2.item_name as wo_status_desc        /*活动状态描述*/,(          case            when lengthb(wp.approve_status) = 0 then null            else wp.approve_status          end        ) :: number as approve_status        /*审批状态  psc_lookup_item_t_3220 classify_code = 'WORK_ORDER_APPROVE_STATUS'*/,        l3.item_name as approve_status_desc        /*审批状态描述*/,        wp.par_workorder_doc_flag        /*父工单是否有交付件(y/n)*/,        wp.deliverables_complete        /*交付件上传状态 0:不涉及交付件 1:待上传交付件 2:交付件上传中,未上传完9:交付件已上传完*/,        wp.revenue_trigger_status        /*触发状态(0:未触发过  1:已触发   2:已触发,pc校验触发失败  3:pc触发成功)*/,        wp.billing_status        /*开票状态(空值:未触发过  1:已开票)*/,        wp.frozen_flag        /*冻结标识(y/n)*/,        wp.mr_frozen_flag        /*mr是否冻结站点要货通过更新实施计划刷新字段*/,        wp.mr_status        /*站点签状态 1未签收,2部分签收,3全部签收,10未签收,20部分签收,30全部签收,40部分超配置签收,50全部超配置签收  完工验状态 p:部分完成,f:全部完成*/,        wp.tool_flag        /*是否挂工具工单回写(y/n)*/,        wp.split_cp_flag        /*拆分施工计划标识 y已拆分 n未拆分*/,        wp.mos_data_source        /*站点签完工验状数据来源*/,        wo.template_id        /*模板id,例如活动流节点id*/,        tfn.task_flow_id        /*任务流id*/,        tfn.task_flow_node_id        /*活动流节点id*/,        tfn.revenue_flag        /*收入里程碑标识(y/n)*/,        tfn.on_site        /*是否现场*/,        nvl(l1.item_name, tfn.owner_type) as owner_type        /*责任方类型 客户/华为/分包商*/,        tfn.subcon        /*是否分包*/        /*产品域*/,case          when wo.enable_flag = 'Y'          and wp.enable_flag = 'Y'          and wo.wo_lifecycle_status = 0          and nvl(du.enable_flag, 'Y') = 'Y' then 'Y'          else 'N'        end as enable_flag        /*有效标识,y为有效n为失效*/,        'N' as del_flag        /*删除标识 y为已删除*/,        4 as data_center_id        /*数据中心id*/,        tf.task_flow_code        /*活动流编码 add by jwx528041 20200408*/,        tfn.task_flow_node_code        /*任务流节点编码 add by jwx528041 20200408*/,        tfn.task_flow_node_name        /*任务流节点名称 add by jwx528041 20200408*/,        tfn.task_flow_node_type        /*任务流节点类型 add by jwx528041 20200408*/,        tfn.enable_flag as flow_enable_flag        /*活动流有效标识 add by jwx528041 20200408*/,        wo.tenant_code        /*租户编码 add by jwx528041 20200408*/,        tfn.activity_id        /*活动流水号 add by jwx528041 20200408*/,        tfn.lead_time        /*持续时间  add by jwx528041 20200408*/,        wo.resource_id as wo_actual_owner_id        /*工单实际责任人id update by swx949890 202207*/,        wo.resource_name as wo_actual_owner        /*工单实际责任人 update by swx949890 202207*/,        wo.contractor_id as wo_actual_owner_contr_id        /*工单实际责任人分包商id update by swx949890 202207*/,        wo.contractor_name as wo_actual_owner_contr_name        /*工单实际责任人分包商名称 update by swx949890 202207*/,        nvl(l4.item_name, tfn.delivery_model) as delivery_model        /*工单交付模式 add by cwx613468 20200711*/,        tfn.on_line_site        /*是否上站 add by cwx613468 20200711*/,        u3.lname as dispatcher_user_name        /*调度人 add by cwx613468 20200711*/,        tfn.approve_level_qty        /*审批总层级 add by jwx528041 20200819*/,        tf.task_flow_name        /*活动流名称 add by jwx528041 20200819*/,        tf.task_flow_type        /*活动流类型 add by jwx528041 20200819*/,        wp.source_code        /*标识actual时间的修改来源,值为mobile标识从手机端回写 add by jwx528041 20200819*/,        wp.plan_updated_by        /*实际开始时间更新人user id add by jwx528041 20200819*/,        wp.plan_update_time        /*计划时间更新时间  add by jwx528041 20200819*/,        wp.dispatch_time        /*调度时间  add by jwx528041 20200819*/,        wp.first_actual_update_time        /*第一次实际开始时间填入时间  add by jwx528041 20200819*/,        wp.first_actual_end_time        /*第一次实际结束时间填入时间  add by jwx528041 20200819*/,        wp.first_actual_updated_by        /*第一次实际时间填入人user id add by jwx528041 20200819*/,        wp.actual_start_update_time        /*实际开始时间更新日期 add by jwx528041 20200819*/,        wp.actual_start_updated_by        /*实际开始时间更新人user id add by jwx528041 20200819*/,        wp.actual_time_source        /*实际完成时间更新来源 add by jwx528041 20200819*/,        wp.actual_end_update_time        /*实际完成时间更新日期 add by jwx528041 20200819*/,        wp.actual_end_updated_by        /*实际完成时间更新人user id add by jwx528041 20200819*/,        wp.revenue_trigger_failed_msg        /*收入触发失败原因 add by jwx528041 20200819*/,        ag.souce_type as delay_reason_souce_type        /*延迟原因数据来源:1、自定义 2、 add by jwx528041 20200819*/        --,ras.tree_type    as wo_owner_tree_type    /*工单责任人项目树节点类型tree_type add by jwx528041 20200819*/,        wo.tree_type as wo_owner_tree_type        /*工单责任人项目树节点类型tree_type update by swx949890 202207*/,        dr.resouce_type as wo_owner_resouce_type        /*工单责任人资源类型 add by jwx528041 20200819*/,        l5.item_name as wo_owner_resouce_type_desc        /*工单责任人资源类型 add by jwx528041 20200819*/,        u4.w3_account as wo_owner_w3_account        /*工单责任人w3账号  add by jwx528041 20200819*/,        rel.du_tf_rel_enable        /*du与活动流关系有效性标识 y:有效 n:失效  add by lwx617215 20210116*/,        t.billing_sla        /*sla*/,        t.billing_milestone        /*开票里程碑*/,        tf.required_tools,        wp.active,        gp.plan_code,        gp.plan_name,        gp.template_plan_id      from        sdisd.ogg_wo_work_order17_3220 wo        inner join sdisd.ogg_wo_progress17_3220 wp on wo.work_order_id = wp.work_order_id        left join sdisd.ogg_wo_task_flow_node_za_3220 tfn on wo.template_id = tfn.task_flow_node_id        and nvl(wo.wo_version, 0) = case          when nvl(wo.wo_version, 0) > 0 then tfn.version          else tfn.wo_version        end        and wo.project_number = tfn.project_number        left join sdisd.ogg_sds_activity_t_za_3220 ac on wo.activity_lib_id = ac.activity_id        left join sdisd.ogg_sds_task_flow_t_za_3220 tf on tfn.task_flow_id = tf.task_flow_id        left join sdisd.ogg_du_release_t_za_3220 du        /*enable_flag新增有效du的判断 lwx617215 20210116*/        on wo.du_id = du.du_id        left join sdisd.ogg_gcc_plan17_3220 gp --dwx1189869        on wo.plan_id = gp.plan_id        and gp.tenant_code = 'RolloutPlan'        and gp.parent_plan_id = -1        and gp.enable_flag = 'Y'        left join (          select            r.du_id,            r.task_flow_id,            /*du与活动流有效标识*/            case              when r.enable_flag = 'Y'              and publish_flag = 'P' then 'Y'              else 'N'            end as du_tf_rel_enable,            row_number() over(              partition by r.du_id,              r.task_flow_id              order by                r.last_update_date desc            ) as rn          from            sdisd.ogg_rp_du_tf_release18_3220 r        ) rel on wo.du_id = rel.du_id        and tfn.task_flow_id = rel.task_flow_id        and rel.rn = 1        left join sdisd.ogg_tpl_user_t_3220 u1 on wo.created_by = u1.user_id        left join sdisd.ogg_tpl_user_t_3220 u2 on wo.last_updated_by = u2.user_id        left join sdisd.ogg_tpl_user_t_3220 u3 on wp.dispatcher_user_id = u3.user_id        left join sdisd.ogg_sds_activity_gap_t_za_3220 ag on wp.delay_reason_id = ag.activity_gap_id        left join sdisd.ogg_tpl_lookup_item_t_3220 l1 on tfn.owner_type = l1.item_code        and l1.classify_code = 'SDS_TASK_OWNER_TYPE'        and l1.language = 'en_US'        left join sdisd.ogg_psc_lookup_item_t_3220 l2 on wp.wo_status = l2.item_code        and l2.classify_code = 'WO_STATUS_CODE'        and l2.language = 'en_US'        left join sdisd.ogg_psc_lookup_item_t_3220 l3 on wp.approve_status = l3.item_code        and l3.classify_code = 'WORK_ORDER_APPROVE_STATUS'        and l3.language = 'en_US'        left join sdisd.ogg_tpl_lookup_item_t_3220 l4 on tfn.delivery_model = l4.item_code        and l4.classify_code = 'SDS_TASK_ON_SITE'        and l4.language = 'en_US'        left join sdisd.ogg_pm_project_tree_node_3220 tn on wo.resource_id = tn.tree_id        left join sdisd.ogg_pm_delivery_resource_3220 dr on tn.resource_id = dr.resource_id        left join sdisd.ogg_tpl_user_t_3220 u4 on dr.user_id = u4.user_id        left join sdisd.ogg_tpl_lookup_item_t_3220 l5 on dr.resouce_type = l5.item_code        and l5.classify_code = 'PM_RESOURCE_TYPE'        and l5.language = 'zh_CN'        left join sdisd.ogg_sds_task_flow_node_za_3220 t on tfn.task_flow_node_id = t.task_flow_node_id      where        (          wo.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or wp.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or tfn.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or ag.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60        ))  as t limit 10
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3、【性能分析】


优化前 SQL 语句执行时间达到 3600s,超时自动报错,如下图所示:



可以看出(具体 verbose 执行计划如附件 1 所示),verbose 执行计划中存在过多的 NestLoop 算子,一般情况下,该算子影响 SQL 语句执行性能,应该尽可能避免使用。通常可以利用语句


set [global] (enable_index_nestloop off)
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来避免执行器走 NestLoop 算子。但有些场景下,该语句无法保证不使用 NestLoop 算子。因此,可以从另一方面入手解决这一问题,优化器因为对表估算不准确,故给出 NestLoop 算子的方案,可以利用 tablescan 这一 hint 对表进行全表扫描,以保证执行器走 HashJoin 算子而非 NestLoop 算子,从而提高语句执行性能。注意:在使用 tablescan 这个 hint 时要保证 NestLoop 算子涉及到的表都要加上优化后的 SQL 语句如下所示:


select * from ( select/*+tablescan(wp) tablescan(wo) tablescan(du) tablescan(ac) tablescan(u3) tablescan(u1) tablescan(u2) tablescan(tn) tablescan(dr) tablescan(u4)tablescan(t)*/        wo.work_order_id /*工单id*/,        wo.work_order_code /*工单编码*/,        wo.work_order_name /*工单名称*/,        wo.work_order_level /*工单层级(第一层级(未拆分工单/父工单):1,第二层级(子工单):10)*/,        decode(wo.work_order_level,1, '第一层级(未拆分工单/父工单)', 10,'第二层级(子工单)') as work_order_level_desc /*工单层级描述*/,        substrb(wo.wo_description, 1, 1000) as wo_description /*工单描述*/,        wo.wo_version /*工单版本号*/,        wo.wo_lifecycle_status /*生命周期标识:0:正常工单,-1: 已删除*/,        wo.business_id /*工单来源业务id*/,        wo.business_type /*工单来源业务类型(10:活动流工单 20:手工派单 30:拆单工单 40:临时mos工单 50:ihub工单 60:ipmo工单 70:wbs工单 80:ncs工单 90:hr工单 100:ls工单 默认10)*/,        decode( wo.business_type, '10', '活动流工单', '20', '手工派单', '30', '拆单工单', '40', '临时MOS工单', '50', 'ihub工单', '60',  'ipmo工单',				                          '70', 'WBS工单', '80', 'NCS工单', '90', 'HR工单', '100', 'LS工单' ) as business_type_desc /*工单来源业务类型描述*/,        wo.parent_activity_id /*父节点活动id*/,        wo.activity_lib_id /*活动库活动id*/,        wo.activity_type /*作业类型,1wbs,2活动,3里程碑*/,        ac.activity_name  /*活动名称*/,        ac.std_ms_code as standard_ms_code  /*标准里程碑编码*/,        wo.plan_id /*计划id*/,        wo.project_number as proj_num  /*项目编码*/,        wo.du_id  /*交付单元id*/,        wo.duration  /*工期*/,        wo.billing_flag /*开票标识:y-开票*/,        wo.na_flag  /*na标识*/,        wo.inv_flag   /*inv标识*/,        wo.master_flag   /*拆分标示,n:未拆分 ; y:已拆分*/,        wo.created_by as created_by_id  /*创建人user id*/,        u1.lname as created_by  /*创建人*/,        wo.creation_date   /*创建时间*/,        wo.last_updated_by as last_updated_by_id   /*最后更新人user id*/,        u2.lname as last_updated_by  /*最后更新人*/,        wo.last_update_date   /*最后更新时间*/,        wp.wo_progress_id  /*活动进度id*/,        wp.expect_start_date  /*预期开始日期*/,        wp.expect_end_date  /*预期结束日期*/,        wp.plan_start_time  /*计划开始时间*/,        wp.plan_end_time /*计划完成时间*/,        wp.actual_start_time  /*实际开始时间*/,        wp.actual_end_time  /*实际完成时间*/,        wp.close_time  /*活动关闭时间*/,        wp.completion_rate   /*完工比率(数值如 0.8666)*/,        to_char(substr(wp.remark, 1, 333)) as progress_description   /*进度备注信息*/,        wp.total_value  /*总值*/,        wp.accumulate_value  /*累计值*/,        wp.report_time  /*值反馈时间*/,        wp.total_plan_value  /*总计划值*/,        wp.ehs_risk  /*高危活动类型*/,        wp.delay_reason_id   /*延迟原因id*/,        substrb(ag.description, 1, 1000) as delay_reason_description  /*延迟原因描述*/,        wp.wo_status  /*活动状态  psc_lookup_item_t_3220 classify_code = 'WO_STATUS_CODE'*/,        l2.item_name as wo_status_desc /*活动状态描述*/,(          case            when lengthb(wp.approve_status) = 0 then null            else wp.approve_status          end        ) :: number as approve_status   /*审批状态  psc_lookup_item_t_3220 classify_code = 'WORK_ORDER_APPROVE_STATUS'*/,        l3.item_name as approve_status_desc   /*审批状态描述*/,        wp.par_workorder_doc_flag  /*父工单是否有交付件(y/n)*/,        wp.deliverables_complete   /*交付件上传状态 0:不涉及交付件 1:待上传交付件 2:交付件上传中,未上传完9:交付件已上传完*/,        wp.revenue_trigger_status   /*触发状态(0:未触发过  1:已触发   2:已触发,pc校验触发失败  3:pc触发成功)*/,        wp.billing_status   /*开票状态(空值:未触发过  1:已开票)*/,        wp.frozen_flag  /*冻结标识(y/n)*/,        wp.mr_frozen_flag   /*mr是否冻结站点要货通过更新实施计划刷新字段*/,        wp.mr_status  /*站点签状态 1未签收,2部分签收,3全部签收,10未签收,20部分签收,30全部签收,40部分超配置签收,50全部超配置签收  完工验状态 p:部分完成,f:全部完成*/,        wp.tool_flag  /*是否挂工具工单回写(y/n)*/,        wp.split_cp_flag   /*拆分施工计划标识 y已拆分 n未拆分*/,        wp.mos_data_source  /*站点签完工验状数据来源*/,        wo.template_id  /*模板id,例如活动流节点id*/,        tfn.task_flow_id  /*任务流id*/,        tfn.task_flow_node_id /*活动流节点id*/,        tfn.revenue_flag /*收入里程碑标识(y/n)*/,        tfn.on_site  /*是否现场*/,        nvl(l1.item_name, tfn.owner_type) as owner_type  /*责任方类型 客户/华为/分包商*/,        tfn.subcon        /*是否分包*/        /*产品域*/,case          when wo.enable_flag = 'Y'          and wp.enable_flag = 'Y'          and wo.wo_lifecycle_status = 0          and nvl(du.enable_flag, 'Y') = 'Y' then 'Y'          else 'N'        end as enable_flag   /*有效标识,y为有效n为失效*/,        'N' as del_flag  /*删除标识 y为已删除*/,        3 as data_center_id  /*数据中心id*/,        tf.task_flow_code   /*活动流编码 add by jwx528041 20200408*/,        tfn.task_flow_node_code  /*任务流节点编码 add by jwx528041 20200408*/,        tfn.task_flow_node_name  /*任务流节点名称 add by jwx528041 20200408*/,        tfn.task_flow_node_type  /*任务流节点类型 add by jwx528041 20200408*/,        tfn.enable_flag as flow_enable_flag  /*活动流有效标识 add by jwx528041 20200408*/,        wo.tenant_code   /*租户编码 add by jwx528041 20200408*/,        tfn.activity_id  /*活动流水号 add by jwx528041 20200408*/,        tfn.lead_time  /*持续时间  add by jwx528041 20200408*/,        wo.resource_id as wo_actual_owner_id   /*工单实际责任人id update by swx949890 202207*/,        wo.resource_name as wo_actual_owner  /*工单实际责任人 update by swx949890 202207*/,        wo.contractor_id as wo_actual_owner_contr_id  /*工单实际责任人分包商id update by swx949890 202207*/,        wo.contractor_name as wo_actual_owner_contr_name  /*工单实际责任人分包商名称 update by swx949890 202207*/,        nvl(l4.item_name, tfn.delivery_model) as delivery_model  /*工单交付模式 add by cwx613468 20200711*/,        tfn.on_line_site  /*是否上站 add by cwx613468 20200711*/,        u3.lname as dispatcher_user_name   /*调度人 add by cwx613468 20200711*/,        tfn.approve_level_qty  /*审批总层级 add by jwx528041 20200819*/,        tf.task_flow_name   /*活动流名称 add by jwx528041 20200819*/,        tf.task_flow_type   /*活动流类型 add by jwx528041 20200819*/,        wp.source_code   /*标识actual时间的修改来源,值为mobile标识从手机端回写 add by jwx528041 20200819*/,        wp.plan_updated_by   /*实际开始时间更新人user id add by jwx528041 20200819*/,        wp.plan_update_time  /*计划时间更新时间  add by jwx528041 20200819*/,        wp.dispatch_time  /*调度时间  add by jwx528041 20200819*/,        wp.first_actual_update_time   /*第一次实际开始时间填入时间  add by jwx528041 20200819*/,        wp.first_actual_end_time   /*第一次实际结束时间填入时间  add by jwx528041 20200819*/,        wp.first_actual_updated_by    /*第一次实际时间填入人user id add by jwx528041 20200819*/,        wp.actual_start_update_time   /*实际开始时间更新日期 add by jwx528041 20200819*/,        wp.actual_start_updated_by   /*实际开始时间更新人user id add by jwx528041 20200819*/,        wp.actual_time_source  /*实际完成时间更新来源 add by jwx528041 20200819*/,        wp.actual_end_update_time /*实际完成时间更新日期 add by jwx528041 20200819*/,        wp.actual_end_updated_by /*实际完成时间更新人user id add by jwx528041 20200819*/,        wp.revenue_trigger_failed_msg        /*收入触发失败原因 add by jwx528041 20200819*/,        ag.souce_type as delay_reason_souce_type  /*延迟原因数据来源:1、自定义 2、 add by jwx528041 20200819*/				 --,ras.tree_type    as wo_owner_tree_type    /*工单责任人项目树节点类型tree_type add by jwx528041 20200819*/ 				 ,        wo.tree_type as wo_owner_tree_type /*工单责任人项目树节点类型tree_type update by swx949890 202207*/,        dr.resouce_type as wo_owner_resouce_type /*工单责任人资源类型 add by jwx528041 20200819*/,        l5.item_name as wo_owner_resouce_type_desc /*工单责任人资源类型 add by jwx528041 20200819*/,        u4.w3_account as wo_owner_w3_account /*工单责任人w3账号  add by jwx528041 20200819*/,        rel.du_tf_rel_enable /*du与活动流关系有效性标识 y:有效 n:失效  add by lwx617215 20210116*/,        t.billing_sla /*sla*/,        t.billing_milestone /*开票里程碑*/,        tf.required_tools,        wp.active,        gp.plan_code,        gp.plan_name,        gp.template_plan_id      from        sdisd.ogg_wo_work_order_2_3220 wo        inner join sdisd.ogg_wo_progress_2_3220 wp on wo.work_order_id = wp.work_order_id        left join sdisd.ogg_wo_task_flow_node_br_3220 tfn on wo.template_id = tfn.task_flow_node_id        and nvl(wo.wo_version, 0) = case          when nvl(wo.wo_version, 0) > 0 then tfn.version          else tfn.wo_version        end        and wo.project_number = tfn.project_number        left join sdisd.ogg_sds_activity_t_br_3220 ac on wo.activity_lib_id = ac.activity_id        left join sdisd.ogg_sds_task_flow_t_br_3220 tf on tfn.task_flow_id = tf.task_flow_id        left join sdisd.ogg_du_release_t_br_3220 du        /*enable_flag新增有效du的判断 lwx617215 20210116*/        on wo.du_id = du.du_id        left join sdisd.ogg_gcc_plan_2_3220 gp --dwx1189869        on wo.plan_id = gp.plan_id        and gp.tenant_code = 'RolloutPlan'        and gp.parent_plan_id = -1        and gp.enable_flag = 'Y'        left join (          select            r.du_id,            r.task_flow_id,            /*du与活动流有效标识*/            case              when r.enable_flag = 'Y'              and publish_flag = 'P' then 'Y'              else 'N'            end as du_tf_rel_enable,            row_number() over(              partition by r.du_id,              r.task_flow_id              order by                r.last_update_date desc            ) as rn          from            sdisd.ogg_rp_du_tf_release_3_3220 r        ) rel on wo.du_id = rel.du_id        and tfn.task_flow_id = rel.task_flow_id        and rel.rn = 1        left join sdisd.ogg_tpl_user_t_3220 u1 on wo.created_by = u1.user_id        left join sdisd.ogg_tpl_user_t_3220 u2 on wo.last_updated_by = u2.user_id        left join sdisd.ogg_tpl_user_t_3220 u3 on wp.dispatcher_user_id = u3.user_id        left join sdisd.ogg_sds_activity_gap_t_br_3220 ag on wp.delay_reason_id = ag.activity_gap_id        left join sdisd.ogg_tpl_lookup_item_t_3220 l1 on tfn.owner_type = l1.item_code        and l1.classify_code = 'SDS_TASK_OWNER_TYPE'        and l1.language = 'en_US'        left join sdisd.ogg_psc_lookup_item_t_3220 l2 on wp.wo_status = l2.item_code        and l2.classify_code = 'WO_STATUS_CODE'        and l2.language = 'en_US'        left join sdisd.ogg_psc_lookup_item_t_3220 l3 on wp.approve_status = l3.item_code        and l3.classify_code = 'WORK_ORDER_APPROVE_STATUS'        and l3.language = 'en_US'        left join sdisd.ogg_tpl_lookup_item_t_3220 l4 on tfn.delivery_model = l4.item_code        and l4.classify_code = 'SDS_TASK_ON_SITE'        and l4.language = 'en_US'        left join sdisd.ogg_pm_project_tree_node_3220 tn on wo.resource_id = tn.tree_id        left join sdisd.ogg_pm_delivery_resource_3220 dr on tn.resource_id = dr.resource_id        left join sdisd.ogg_tpl_user_t_3220 u4 on dr.user_id = u4.user_id        left join sdisd.ogg_tpl_lookup_item_t_3220 l5 on dr.resouce_type = l5.item_code        and l5.classify_code = 'PM_RESOURCE_TYPE'        and l5.language = 'zh_CN'        left join sdisd.ogg_sds_task_flow_node_br_3220 t on tfn.task_flow_node_id = t.task_flow_node_id      where        (          wo.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or wp.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or tfn.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or ag.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60        )  union all      select        wo.work_order_id        /*工单id*/,        wo.work_order_code        /*工单编码*/,        wo.work_order_name        /*工单名称*/,        wo.work_order_level        /*工单层级(第一层级(未拆分工单/父工单):1,第二层级(子工单):10)*/,        decode(          wo.work_order_level,          1,          '第一层级(未拆分工单/父工单)',          10,          '第二层级(子工单)'        ) as work_order_level_desc        /*工单层级描述*/,        substrb(wo.wo_description, 1, 1000) as wo_description        /*工单描述*/,        wo.wo_version        /*工单版本号*/,        wo.wo_lifecycle_status        /*生命周期标识:0:正常工单,-1: 已删除*/,        wo.business_id        /*工单来源业务id*/,        wo.business_type        /*工单来源业务类型(10:活动流工单 20:手工派单 30:拆单工单 40:临时mos工单 50:ihub工单 60:ipmo工单 70:wbs工单 80:ncs工单 90:hr工单 100:ls工单 默认10)*/,        decode(          wo.business_type,          '10',          '活动流工单',          '20',          '手工派单',          '30',          '拆单工单',          '40',          '临时MOS工单',          '50',          'ihub工单',          '60',          'ipmo工单',          '70',          'WBS工单',          '80',          'NCS工单',          '90',          'HR工单',          '100',          'LS工单'        ) as business_type_desc        /*工单来源业务类型描述*/,        wo.parent_activity_id        /*父节点活动id*/,        wo.activity_lib_id        /*活动库活动id*/,        wo.activity_type        /*作业类型,1wbs,2活动,3里程碑*/,        ac.activity_name        /*活动名称*/,        ac.std_ms_code as standard_ms_code        /*标准里程碑编码*/,        wo.plan_id        /*计划id*/,        wo.project_number as proj_num        /*项目编码*/,        wo.du_id        /*交付单元id*/,        wo.duration        /*工期*/,        wo.billing_flag        /*开票标识:y-开票*/,        wo.na_flag        /*na标识*/,        wo.inv_flag        /*inv标识*/,        wo.master_flag        /*拆分标示,n:未拆分 ; y:已拆分*/,        wo.created_by as created_by_id        /*创建人user id*/,        u1.lname as created_by        /*创建人*/,        wo.creation_date        /*创建时间*/,        wo.last_updated_by as last_updated_by_id        /*最后更新人user id*/,        u2.lname as last_updated_by        /*最后更新人*/,        wo.last_update_date        /*最后更新时间*/,        wp.wo_progress_id        /*活动进度id*/,        wp.expect_start_date        /*预期开始日期*/,        wp.expect_end_date        /*预期结束日期*/,        wp.plan_start_time        /*计划开始时间*/,        wp.plan_end_time        /*计划完成时间*/,        wp.actual_start_time        /*实际开始时间*/,        wp.actual_end_time        /*实际完成时间*/,        wp.close_time        /*活动关闭时间*/,        wp.completion_rate        /*完工比率(数值如 0.8666)*/,        to_char(substr(wp.remark, 1, 333)) as progress_description        /*进度备注信息*/,        wp.total_value        /*总值*/,        wp.accumulate_value        /*累计值*/,        wp.report_time        /*值反馈时间*/,        wp.total_plan_value        /*总计划值*/,        wp.ehs_risk        /*高危活动类型*/,        wp.delay_reason_id        /*延迟原因id*/,        substrb(ag.description, 1, 1000) as delay_reason_description        /*延迟原因描述*/,        wp.wo_status        /*活动状态  psc_lookup_item_t_3220 classify_code = 'WO_STATUS_CODE'*/,        l2.item_name as wo_status_desc        /*活动状态描述*/,(          case            when lengthb(wp.approve_status) = 0 then null            else wp.approve_status          end        ) :: number as approve_status        /*审批状态  psc_lookup_item_t_3220 classify_code = 'WORK_ORDER_APPROVE_STATUS'*/,        l3.item_name as approve_status_desc        /*审批状态描述*/,        wp.par_workorder_doc_flag        /*父工单是否有交付件(y/n)*/,        wp.deliverables_complete        /*交付件上传状态 0:不涉及交付件 1:待上传交付件 2:交付件上传中,未上传完9:交付件已上传完*/,        wp.revenue_trigger_status        /*触发状态(0:未触发过  1:已触发   2:已触发,pc校验触发失败  3:pc触发成功)*/,        wp.billing_status        /*开票状态(空值:未触发过  1:已开票)*/,        wp.frozen_flag        /*冻结标识(y/n)*/,        wp.mr_frozen_flag        /*mr是否冻结站点要货通过更新实施计划刷新字段*/,        wp.mr_status        /*站点签状态 1未签收,2部分签收,3全部签收,10未签收,20部分签收,30全部签收,40部分超配置签收,50全部超配置签收  完工验状态 p:部分完成,f:全部完成*/,        wp.tool_flag        /*是否挂工具工单回写(y/n)*/,        wp.split_cp_flag        /*拆分施工计划标识 y已拆分 n未拆分*/,        wp.mos_data_source        /*站点签完工验状数据来源*/,        wo.template_id        /*模板id,例如活动流节点id*/,        tfn.task_flow_id        /*任务流id*/,        tfn.task_flow_node_id        /*活动流节点id*/,        tfn.revenue_flag        /*收入里程碑标识(y/n)*/,        tfn.on_site        /*是否现场*/,        nvl(l1.item_name, tfn.owner_type) as owner_type        /*责任方类型 客户/华为/分包商*/,        tfn.subcon        /*是否分包*/        /*产品域*/,case          when wo.enable_flag = 'Y'          and wp.enable_flag = 'Y'          and wo.wo_lifecycle_status = 0          and nvl(du.enable_flag, 'Y') = 'Y' then 'Y'          else 'N'        end as enable_flag        /*有效标识,y为有效n为失效*/,        'N' as del_flag        /*删除标识 y为已删除*/,        4 as data_center_id        /*数据中心id*/,        tf.task_flow_code        /*活动流编码 add by jwx528041 20200408*/,        tfn.task_flow_node_code        /*任务流节点编码 add by jwx528041 20200408*/,        tfn.task_flow_node_name        /*任务流节点名称 add by jwx528041 20200408*/,        tfn.task_flow_node_type        /*任务流节点类型 add by jwx528041 20200408*/,        tfn.enable_flag as flow_enable_flag        /*活动流有效标识 add by jwx528041 20200408*/,        wo.tenant_code        /*租户编码 add by jwx528041 20200408*/,        tfn.activity_id        /*活动流水号 add by jwx528041 20200408*/,        tfn.lead_time        /*持续时间  add by jwx528041 20200408*/,        wo.resource_id as wo_actual_owner_id        /*工单实际责任人id update by swx949890 202207*/,        wo.resource_name as wo_actual_owner        /*工单实际责任人 update by swx949890 202207*/,        wo.contractor_id as wo_actual_owner_contr_id        /*工单实际责任人分包商id update by swx949890 202207*/,        wo.contractor_name as wo_actual_owner_contr_name        /*工单实际责任人分包商名称 update by swx949890 202207*/,        nvl(l4.item_name, tfn.delivery_model) as delivery_model        /*工单交付模式 add by cwx613468 20200711*/,        tfn.on_line_site        /*是否上站 add by cwx613468 20200711*/,        u3.lname as dispatcher_user_name        /*调度人 add by cwx613468 20200711*/,        tfn.approve_level_qty        /*审批总层级 add by jwx528041 20200819*/,        tf.task_flow_name        /*活动流名称 add by jwx528041 20200819*/,        tf.task_flow_type        /*活动流类型 add by jwx528041 20200819*/,        wp.source_code        /*标识actual时间的修改来源,值为mobile标识从手机端回写 add by jwx528041 20200819*/,        wp.plan_updated_by        /*实际开始时间更新人user id add by jwx528041 20200819*/,        wp.plan_update_time        /*计划时间更新时间  add by jwx528041 20200819*/,        wp.dispatch_time        /*调度时间  add by jwx528041 20200819*/,        wp.first_actual_update_time        /*第一次实际开始时间填入时间  add by jwx528041 20200819*/,        wp.first_actual_end_time        /*第一次实际结束时间填入时间  add by jwx528041 20200819*/,        wp.first_actual_updated_by        /*第一次实际时间填入人user id add by jwx528041 20200819*/,        wp.actual_start_update_time        /*实际开始时间更新日期 add by jwx528041 20200819*/,        wp.actual_start_updated_by        /*实际开始时间更新人user id add by jwx528041 20200819*/,        wp.actual_time_source        /*实际完成时间更新来源 add by jwx528041 20200819*/,        wp.actual_end_update_time        /*实际完成时间更新日期 add by jwx528041 20200819*/,        wp.actual_end_updated_by        /*实际完成时间更新人user id add by jwx528041 20200819*/,        wp.revenue_trigger_failed_msg        /*收入触发失败原因 add by jwx528041 20200819*/,        ag.souce_type as delay_reason_souce_type        /*延迟原因数据来源:1、自定义 2、 add by jwx528041 20200819*/        --,ras.tree_type    as wo_owner_tree_type    /*工单责任人项目树节点类型tree_type add by jwx528041 20200819*/,        wo.tree_type as wo_owner_tree_type        /*工单责任人项目树节点类型tree_type update by swx949890 202207*/,        dr.resouce_type as wo_owner_resouce_type        /*工单责任人资源类型 add by jwx528041 20200819*/,        l5.item_name as wo_owner_resouce_type_desc        /*工单责任人资源类型 add by jwx528041 20200819*/,        u4.w3_account as wo_owner_w3_account        /*工单责任人w3账号  add by jwx528041 20200819*/,        rel.du_tf_rel_enable        /*du与活动流关系有效性标识 y:有效 n:失效  add by lwx617215 20210116*/,        t.billing_sla        /*sla*/,        t.billing_milestone        /*开票里程碑*/,        tf.required_tools,        wp.active,        gp.plan_code,        gp.plan_name,        gp.template_plan_id      from        sdisd.ogg_wo_work_order17_3220 wo        inner join sdisd.ogg_wo_progress17_3220 wp on wo.work_order_id = wp.work_order_id        left join sdisd.ogg_wo_task_flow_node_za_3220 tfn on wo.template_id = tfn.task_flow_node_id        and nvl(wo.wo_version, 0) = case          when nvl(wo.wo_version, 0) > 0 then tfn.version          else tfn.wo_version        end        and wo.project_number = tfn.project_number        left join sdisd.ogg_sds_activity_t_za_3220 ac on wo.activity_lib_id = ac.activity_id        left join sdisd.ogg_sds_task_flow_t_za_3220 tf on tfn.task_flow_id = tf.task_flow_id        left join sdisd.ogg_du_release_t_za_3220 du        /*enable_flag新增有效du的判断 lwx617215 20210116*/        on wo.du_id = du.du_id        left join sdisd.ogg_gcc_plan17_3220 gp --dwx1189869        on wo.plan_id = gp.plan_id        and gp.tenant_code = 'RolloutPlan'        and gp.parent_plan_id = -1        and gp.enable_flag = 'Y'        left join (          select            r.du_id,            r.task_flow_id,            /*du与活动流有效标识*/            case              when r.enable_flag = 'Y'              and publish_flag = 'P' then 'Y'              else 'N'            end as du_tf_rel_enable,            row_number() over(              partition by r.du_id,              r.task_flow_id              order by                r.last_update_date desc            ) as rn          from            sdisd.ogg_rp_du_tf_release18_3220 r        ) rel on wo.du_id = rel.du_id        and tfn.task_flow_id = rel.task_flow_id        and rel.rn = 1        left join sdisd.ogg_tpl_user_t_3220 u1 on wo.created_by = u1.user_id        left join sdisd.ogg_tpl_user_t_3220 u2 on wo.last_updated_by = u2.user_id        left join sdisd.ogg_tpl_user_t_3220 u3 on wp.dispatcher_user_id = u3.user_id        left join sdisd.ogg_sds_activity_gap_t_za_3220 ag on wp.delay_reason_id = ag.activity_gap_id        left join sdisd.ogg_tpl_lookup_item_t_3220 l1 on tfn.owner_type = l1.item_code        and l1.classify_code = 'SDS_TASK_OWNER_TYPE'        and l1.language = 'en_US'        left join sdisd.ogg_psc_lookup_item_t_3220 l2 on wp.wo_status = l2.item_code        and l2.classify_code = 'WO_STATUS_CODE'        and l2.language = 'en_US'        left join sdisd.ogg_psc_lookup_item_t_3220 l3 on wp.approve_status = l3.item_code        and l3.classify_code = 'WORK_ORDER_APPROVE_STATUS'        and l3.language = 'en_US'        left join sdisd.ogg_tpl_lookup_item_t_3220 l4 on tfn.delivery_model = l4.item_code        and l4.classify_code = 'SDS_TASK_ON_SITE'        and l4.language = 'en_US'        left join sdisd.ogg_pm_project_tree_node_3220 tn on wo.resource_id = tn.tree_id        left join sdisd.ogg_pm_delivery_resource_3220 dr on tn.resource_id = dr.resource_id        left join sdisd.ogg_tpl_user_t_3220 u4 on dr.user_id = u4.user_id        left join sdisd.ogg_tpl_lookup_item_t_3220 l5 on dr.resouce_type = l5.item_code        and l5.classify_code = 'PM_RESOURCE_TYPE'        and l5.language = 'zh_CN'        left join sdisd.ogg_sds_task_flow_node_za_3220 t on tfn.task_flow_node_id = t.task_flow_node_id      where        (          wo.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or wp.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or tfn.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60          or ag.cdc_create_date >= to_timestamp('20231021', 'yyyy-mm-dd hh24:mi:ss.ff') -1 / 24 / 60        ))  as t limit 10
复制代码


如下图所示,该语句执行时间降为 27s+,提升了语句的执行性能。



具体的 performance 执行计划如附件 2 所示。



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