查询其他数据库

Question

我在OTRS的postgresql数据库上创建查询时遇到问题。我需要获取存储在CMDB中的一些数据的资产列表，但我在存储数据的方式方面遇到问题。

这个查询可以正常工作，但只要我添加另一个左连接来获得更多的数据，它只是运行而不返回任何结果。

据我所见，问题是所有信息都包含在xml_storage表中，没有任何关系，所以我需要反复查询该表以获取数据。还有一些数据类型的混合，其中整数作为可变字符存储在某些情况下，这使我无法使用该值从通用目录获取更多信息。

我一直在敲打我的头撞墙了这个日子，所以我真的很感激任何帮助

SELECT 
     asset_value, 
     manufacturer_value, 
     model_value, 
     serial_value, 
     fqdn_value, 
     array_agg(service), 
     purchasedate_value, 
     status_value, 
     configitem.configitem_number, 
     configitem_version.name, 
     general_catalog.name 

    FROM 
     public.configitem_version, 
     public.general_catalog, 
     public.configitem 

    left join 
     (SELECT 
     xml_storage.xml_content_value AS asset_value, 
     xml_storage.xml_key 
     FROM 
     public.xml_storage 
     WHERE 
     xml_content_key = '[1]{''Version''}[1]{''Asset Number''}[1]{''Content''}') as select_asset on last_version_id::int = select_asset.xml_key::int 

    left join 
     (SELECT 
     xml_storage.xml_content_value AS manufacturer_value, 
     xml_storage.xml_key 
     FROM 
     public.xml_storage 
     WHERE 
     xml_content_key = '[1]{''Version''}[1]{''Manufacturer''}[1]{''Content''}') as select_manufacturer on last_version_id::int = select_manufacturer.xml_key::int 

    left join 
     (SELECT 
     xml_storage.xml_content_value AS model_value, 
     xml_storage.xml_key 
     FROM 
     public.xml_storage 
     WHERE 
     xml_content_key = '[1]{''Version''}[1]{''Model''}[1]{''Content''}') as select_model on last_version_id::int = select_model.xml_key::int 

    left join 
     (SELECT 
     xml_storage.xml_content_value AS serial_value, 
     xml_storage.xml_key 
     FROM 
     public.xml_storage 
     WHERE 
     xml_content_key = '[1]{''Version''}[1]{''SerialNumber''}[1]{''Content''}') as select_serial on last_version_id::int = select_serial.xml_key::int 

    left join 
     (SELECT 
     xml_storage.xml_content_value AS fqdn_value, 
     xml_storage.xml_key 
     FROM 
     public.xml_storage 
     WHERE 
     xml_content_key = '[1]{''Version''}[1]{''FQDN''}[1]{''Content''}') as select_fqdn on last_version_id::int = select_fqdn.xml_key::int 

    left join 
     (SELECT 
     link_relation.source_key AS "configitem_id", 
     service.name AS "service" 
     FROM 
     public.link_relation, 
     public.service 
     WHERE 
     link_relation.target_key::int = service.id AND 
     link_relation.target_object_id::int = 2 AND link_relation.source_object_id::int = 3 
     UNION 
     SELECT 
     link_relation.target_key AS "configitem_id", 
     service.name AS "service" 
     FROM 
     public.link_relation, 
     public.service 
     WHERE 
     link_relation.source_key::int = service.id AND 
     link_relation.target_object_id::int = 3 AND link_relation.source_object_id::int = 2) as select_service on configitem.id = configitem_id::int 

    left join 
     (SELECT 
     xml_storage.xml_content_value AS purchasedate_value, 
     xml_storage.xml_key 
     FROM 
     public.xml_storage 
     WHERE 
     xml_content_key = '[1]{''Version''}[1]{''PurchaseDate''}[1]{''Content''}') as select_purchasedate on last_version_id::int = select_purchasedate.xml_key::int 

    left join 
     (SELECT 
     general_catalog.name AS status_value, 
     general_catalog.id 
     FROM 
     public.general_catalog) as select_status on configitem.cur_depl_state_id::int = select_status.id::int 

    WHERE 
     configitem.last_version_id = configitem_version.id AND 
     configitem.class_id = general_catalog.id AND 
     (configitem.class_id = 32 OR configitem.class_id = 33) 


    GROUP BY 
     asset_value, 
     manufacturer_value, 
     model_value, 
     serial_value, 
     fqdn_value, 
     purchasedate_value, 
     status_value, 
     configitem.configitem_number, 
     configitem_version.name, 
     general_catalog.name 

    ; 

Answer 1

是否有可能为你使用OTRS API，而不是查询？以这种方式获取数据会更容易一些。 此外，ImportExport模块允许将数据导出到.csv文件;根据您的需要，这可能是一个选择。