lob

Third party WPF controls: Devexpress vs Telerik [closed]

由 拟墨画扇 提交于 2020-01-11 15:46:11
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . I would like to hear your opinion about the two control providers. To put it in a nutshell: I am building a classic LOB desktop application. The app will be created entirely in WPF. PRISM 4.0 will be used heavily. Whenever possible, I will try to follow MVVM pattern(it would be

How do I display the full content of LOB column in Oracle SQL*Plus?

由 别等时光非礼了梦想. 提交于 2019-12-31 13:17:47
问题 When I try to display the contents of a LOB (large object) column in SQL*Plus, it is truncated. How do I display the whole thing? 回答1: SQL> set long 30000 SQL> show long long 30000 回答2: You may also need: SQL> set longchunksize 30000 Otherwise the LOB/CLOB will wrap. 来源： https://stackoverflow.com/questions/122772/how-do-i-display-the-full-content-of-lob-column-in-oracle-sqlplus

How do I display the full content of LOB column in Oracle SQL*Plus?

由 纵饮孤独 提交于 2019-12-31 13:17:04
问题 When I try to display the contents of a LOB (large object) column in SQL*Plus, it is truncated. How do I display the whole thing? 回答1: SQL> set long 30000 SQL> show long long 30000 回答2: You may also need: SQL> set longchunksize 30000 Otherwise the LOB/CLOB will wrap. 来源： https://stackoverflow.com/questions/122772/how-do-i-display-the-full-content-of-lob-column-in-oracle-sqlplus

Cannot store Euro-sign into LOB String property with Hibernate/PostgreSQL

由 倖福魔咒の 提交于 2019-12-30 06:07:35
问题 I am having trouble writing and reading back special characters like the Euro-sign (€) into LOB String properties in PostgreSQL 8.4 with Hibernate 3.6.10. What I know is that PostgreSQL provides two distinct ways to store large character objects in a column of a table. They can be stored either directly into that table column or indirectly in a separate table (it's actually called pg_largeobject). In the latter case, the column holds a reference (OID) to the row in pg_largeobject. The default

org.postgresql.util.PSQLException: Large Objects may not be used in auto-commit mode

由 痴心易碎 提交于 2019-12-18 09:10:16
问题 I am using Spring , JPA, Hibernate, Postgresql. I can upload/insert a file to the database. But I got the error when tried to access the file. EVERE: Servlet.service() for servlet default threw exception org.postgresql.util.PSQLException: Large Objects may not be used in auto-commit mode. at org.postgresql.largeobject.LargeObjectManager.open(LargeObjectManager.java:200) at org.postgresql.largeobject.LargeObjectManager.open(LargeObjectManager.java:172) at org.postgresql.jdbc2

JDODetachedFieldAccessException: You have just attempted to access field “attachment” yet this field was not detached when you detached the object

由 流过昼夜 提交于 2019-12-13 13:16:12
问题 Entity class: public class CustomerSurvey implements Serializable { @Id @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="CUSTOMER_SURVEY_SEQUENCE") @Column(name = "SURVEYID", nullable = false) private String surveyId; @Column(name="ATTACHMENT") @Lob private byte[] attachment; .... Persistence class/logic: public List<CustomerSurvey> getSurveysByCustomer(String custNo) throws WorkServiceException { EntityManager em = entityManagerFactory.createEntityManager(); Query query = em

How to reclaim space occupied by unused LOBs in PostgreSQL

由 為{幸葍}努か 提交于 2019-12-10 18:53:07
问题 I have a medium sized database cluster running on PostgreSQL 8.3. The database stores digital files (images) as LOBs. There is a fair bit of activity in the database cluster, a lot of content is created and deleted in an ongoing manner. Even though the application table which hosts the OIDs, gets maintained properly by the application (when an image file is deleted), the size of the database cluster grows continuously. Auto-vacuuming is active so this shouldn't happen. 回答1: LOBs are NOT

Lazily loading a clob in hibernate

由 别来无恙 提交于 2019-12-05 11:56:28
问题 There's a lot one can find about this googling a bit but I haven't quite found a workable solution to this problem. Basically what I have is a big CLOB on a particular class that I want to have loaded on demand. The naive way to do this would be: class MyType { // ... @Basic(fetch=FetchType.LAZY) @Lob public String getBlob() { return blob; } } That doesn't work though, apparently due to the fact I'm using oracle drivers, i.e. Lob objects aren't treated as simple handles but are always loaded.

What is the difference between CLOB and NCLOB?

由 霸气de小男生 提交于 2019-12-04 09:53:34
问题 Can you state any difference between the CLOB and NCLOB? 回答1: A CLOB stores character data encoded in the database character set. A NCLOB stores character data encoded in the national character set SELECT parameter, value FROM v$nls_parameters WHERE parameter LIKE '%CHARACTERSET' will show you the database and national character sets of your database. 来源： https://stackoverflow.com/questions/6854609/what-is-the-difference-between-clob-and-nclob

Lazily loading a clob in hibernate

由 我与影子孤独终老i 提交于 2019-12-03 23:33:46
There's a lot one can find about this googling a bit but I haven't quite found a workable solution to this problem. Basically what I have is a big CLOB on a particular class that I want to have loaded on demand. The naive way to do this would be: class MyType { // ... @Basic(fetch=FetchType.LAZY) @Lob public String getBlob() { return blob; } } That doesn't work though, apparently due to the fact I'm using oracle drivers, i.e. Lob objects aren't treated as simple handles but are always loaded. Or so I've been led to believe from my forays. There is one solution that uses special instrumentation
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