如何使用pyodbc连接到vertica

Question

我已经阅读了有关该文件odbc.ini和Vertica文档的iODBC 文档.我也看到了一个带有相同错误的问题,但无法让连接字符串按照上一个问题的答案中的建议工作.

我目前拥有的:

/etc/odbcinst.ini

[HPVertica]
Description = HP Vertica ODBC Driver
Driver = /opt/vertica/lib64/libverticaodbc.so

/etc/odbc.ini

[ODBC Data Sources]
VerticaDB1 = db1 database on HP Vertica

[VerticaDB1]
Description = db1 database on HP Vertica
Driver = HPVertica
Database = db1
Servername = 10.0.0.67
UID = dbadmin
PWD = 
Port = 5433
Locale = en_GB

[ODBC]
Threading = 1

~/.odbc.ini

[DEFAULT]

Driver = VerticaDB1

测试用 isql

[root@ip-10-0-0-67 /]# echo "select 1;" | isql -v VerticaDB1
+---------------------------------------+
| Connected!                            |
|                                       |
| sql-statement                         |
| help [tablename]                      |
| quit                                  |
|                                       |
+---------------------------------------+
SQL> select 1;
+---------------------+
| ?column?            |
+---------------------+
| 1                   |
+---------------------+
SQLRowCount returns 1
1 rows fetched

odbcinst -j 输出:

unixODBC 2.2.14
DRIVERS............: /etc/odbcinst.ini
SYSTEM DATA SOURCES: /etc/odbc.ini
FILE DATA SOURCES..: /etc/ODBCDataSources
USER DATA SOURCES..: /root/.odbc.ini
SQLULEN Size.......: 8
SQLLEN Size........: 8
SQLSETPOSIROW Size.: 8

在使用"VerticaDB1"的Python中:

>>> import pyodbc
>>> conn = pyodbc.connect("DRIVER={VerticaDB1};UID={dbadmin};PWD={...}")
Traceback (most recent call last):
  File "", line 1, in 
pyodbc.Error: ('IM002', '[IM002] [unixODBC][Driver Manager]Data source name not 
found, and no default driver specified (0) (SQLDriverConnect)')

在使用"HPVertica"的Python中:

>>> import pyodbc
>>> conn = pyodbc.connect("DRIVER={HPVertica};UID={dbadmin};PWD={...}")
Traceback (most recent call last):
  File "", line 1, in 
pyodbc.Error: ('HY000', '[HY000] [unixODBC][Vertica][ODBC] (10430) Not enough 
information provided to establish a connection to the data source and specified 
to not prompt for more information. (10430) (SQLDriverConnect)')

Answer 1

尝试连接使用DSN:

conn = pyodbc.connect("DSN=VerticaDB1;UID=dbadmin;PWD=mypassword")

或者,您可以使用连接DRIVER,但需要提供更多信息,例如数据库,主机和端口:

conn = pyodbc.connect("DRIVER=HPVertica;SERVER=10.0.0.67;DATABASE=db1;PORT=5433;UID=dbadmin;PWD=mypassword")