Question

我想使用SQLDeveloper与PostgreSQL数据库建立连接，但是当我要选择数据库时，它没有显示我可以选择的任何数据库。我的操作系统是CentOS 6，SQLDeveloper 17.4.1.054，而我的jdbc是42.2.4.jar 。我在CentOS的端口5432上安装了PostgreSQL 10.4

我真的很陌生，所以我不知道我做错了什么。预先感谢Screenshot of the SQLDeveloper

Answer 1

首先在所需的数据库上尝试psql

这是我在Postgres上的本地数据库的列表

$ psql 
psql (10.3)
Type "help" for help.

bamcgill=# show databases
bamcgill-# \l
                                  List of databases
   Name    |  Owner   | Encoding |   Collate   |    Ctype    |   Access privileges   
-----------+----------+----------+-------------+-------------+-----------------------
 bamcgill  | bamcgill | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 postgres  | bamcgill | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | bamcgill | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/bamcgill          +
           |          |          |             |             | bamcgill=CTc/bamcgill
 template1 | bamcgill | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/bamcgill          +
           |          |          |             |             | bamcgill=CTc/bamcgill
 world     | bamcgill | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
(5 rows)

bamcgill-# \c world
You are now connected to database "world" as user "bamcgill".
world-# \dt
              List of relations
 Schema |      Name       | Type  |  Owner   
--------+-----------------+-------+----------
 public | city            | table | bamcgill
 public | country         | table | bamcgill
 public | countrylanguage | table | bamcgill
(3 rows)

world-#

Answer 2

我试图重新配置位于/ var / lib / pgsql / 10 / data /

的pg_hba.conf。

我将IPv4部分的方法从“ ident”更改为“ trust”

for (int i = 0; i < img_left.cols; i++) {
    for (int j = 0; j < img_left.rows; j++) {
        kpl.push_back(KeyPoint(i,j,1));
        kpr.push_back(KeyPoint(i,j,1));
    }
}

之后，我重新启动了PostgreSQL服务，并设法从SQLDeveloper建立到PostgreSQL的连接

与SQLDeveloper建立连接时无法选择PostgreSQL数据库

2 个答案: