尝试使用pyodbc连接到Postgres。
我可以使用isql连接到数据库:
echo "select 1" | isql -v my-connector
返回:
+---------------------------------------+
| Connected! |
| |
| sql-statement |
| help [tablename] |
| quit |
| |
+---------------------------------------+
SQL> select 1
+------------+
| ?column? |
+------------+
| 1 |
+------------+
SQLRowCount returns 1
1 rows fetched
但是当我尝试连接pyodbc时:
import pyodbc
con = pyodbc.connect("DRIVER={PostgreSQL Unicode}; DATABASE=<dbname>; UID=<username>; PWD=<password>; SERVER=localhost; PORT=5432;")
我收到以下错误:
pyodbc.Error: ('08001', '[08001] [unixODBC]connction string lacks some options (202) (SQLDriverConnect)')
obdc.ini文件如下所示:
[my-connector]
Description = PostgreSQL connection to '<dbname>' database
Driver = PostgreSQL Unicode
Database = <dbname>
Servername = localhost
UserName = <username>
Password = <password>
Port = 5432
Protocol = 9.3
ReadOnly = No
RowVersioning = No
ShowSystemTables = No
ShowOidColumn = No
FakeOidIndex = No
ConnSettings =
odbcinst.ini文件如下所示:
[PostgreSQL ANSI]
Description = PostgreSQL ODBC driver (ANSI version)
Driver = psqlodbca.so
Setup = libodbcpsqlS.so
Debug = 0
CommLog = 1
UsageCount = 1
[PostgreSQL Unicode]
Description = PostgreSQL ODBC driver (Unicode version)
Driver = psqlodbcw.so
Setup = libodbcpsqlS.so
Debug = 0
CommLog = 1
UsageCount = 1
注意:
我过去曾使用psycopg2连接到Postgres,但我目前的公司使用的是Netezza,Postgres和MySQL。我想编写1个连接模块,并使用不同的驱动程序连接到不同的数据库。 任何帮助将不胜感激。
- 谢谢
答案 0 :(得分:8)
由于您已经在odbc.ini中定义了可用的DSN,因此您可以使用它:
con = pyodbc.connect("DSN=my-connector")
此外,对于记录,连接字符串中的额外空格可能会让问题混乱,因为这对我来说很好,至少在Python 2.7下
import pyodbc
conn_str = (
"DRIVER={PostgreSQL Unicode};"
"DATABASE=postgres;"
"UID=postgres;"
"PWD=whatever;"
"SERVER=localhost;"
"PORT=5432;"
)
conn = pyodbc.connect(conn_str)
crsr = conn.execute("SELECT 123 AS n")
row = crsr.fetchone()
print(row)
crsr.close()
conn.close()