LightDB24.1支持create/drop directory命令

背景介绍

为了方便用户从Oracle数据库迁移到LightDB上，从LightDB24.1版本开始，支持create/drop directory命令。

使用约束:

• 该命令只在Oracle兼容模式下生效
• 不能为LTHOME、LTDATA目录或者它们的子目录建立directory对象

使用示例

1. 创建directory对象

lightdb@oracle_test=# create directory adir as '/home/lightdb';
 create_directory 
------------------
 t
(1 row)

lightdb@oracle_test=# select * from utl_file.utl_file_dir;
      dir      | dirname 
---------------+---------
 /home/lightdb | ADIR
(1 row)

lightdb@oracle_test=# 
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2. create or replace创建对象

lightdb@oracle_test=# create directory adir as '/home/lightdb';
ERROR:  directory ADIR is exist
lightdb@oracle_test=# create or replace directory adir as '/home/lightdb';
 create_directory 
------------------
 t
(1 row)

lightdb@oracle_test=# select * from utl_file.utl_file_dir;
      dir      | dirname 
---------------+---------
 /home/lightdb | ADIR
(1 row)

lightdb@oracle_test=# 
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3. drop对象

lightdb@oracle_test=# drop directory adir;
 drop_directory 
----------------
 t
(1 row)

lightdb@oracle_test=# select * from utl_file.utl_file_dir;
 dir | dirname 
-----+---------
(0 rows)

lightdb@oracle_test=# 
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