Connect to remote PostgreSql database using Powershell

Question

I'm trying to connect to a remote PostgreSql database using powershell. This is my first time using powershell so I'm sorry if this is a noob question. This is my Code:

$DBConnectionString = "Driver={PostgreSQL UNICODE}:Server=$MyServer;Port=$MyPort;Database=$MyDB;Uid=$MyUid;Pwd=$MyPass;"
$DBConn = New-Object System.Data.Odbc.OdbcConnection;
$DBConn.ConnectionString = $DBConnectionString;
$DBConn.Open();
$DBCmd = $DBConn.CreateCommand();
$DBCmd.CommandText = "SELECT * FROM mytable;";
$DBCmd.ExecuteReader();
$DBConn.Close();

When I run this I get "Exception Calling "Open" with "0" argument(s): ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified". I've downloaded and installed the pgsqlodbc driver but I'm still getting this error. Does anyone have any ideas how I could fix this? I have searched the internet and I'm really not getting anywhere at this point.

Thanks.

score 8 · Answer 1 · edited Aug 16 '17 at 11:40

Consult: https://odbc.postgresql.org/
Download: https://www.postgresql.org/ftp/odbc/versions/msi/

Data sources (ODBC) on Windows: Start → Search → odbc → User DSN → Add/Configure

Example :

$MyServer = "<ip>"
$MyPort  = "5432"
$MyDB = "<database>"
$MyUid = "<user>"
$MyPass = "<pass>"

$DBConnectionString = "Driver={PostgreSQL UNICODE(x64)};Server=$MyServer;Port=$MyPort;Database=$MyDB;Uid=$MyUid;Pwd=$MyPass;"
$DBConn = New-Object System.Data.Odbc.OdbcConnection;
$DBConn.ConnectionString = $DBConnectionString;
$DBConn.Open();
$DBCmd = $DBConn.CreateCommand();
$DBCmd.CommandText = "SELECT * FROM tb_module;";
$DBCmd.ExecuteReader();
$DBConn.Close();

This works for me but my result is array which had header FieldCountr and 5 rows with number 3 there. The result is 3 column with 5 rown but how can I assign it to array? — sixplus4iszen, Feb 22 '22 at 14:45

dog · Answer 2 · 2020-08-10T02:00:53.673

6

You can use psql which comes with postgresql if you happen to have postgresql installed on your client

$dburl="postgresql://exusername:expw@exhostname:5432/postgres"
$data="select * from extable" | psql --csv $dburl | ConvertFrom-Csv

You must have psql in your path or reference it, its within e.g. C:\Program Files\PostgreSQL\12\bin. Should be able to type "psql" and see output within powershell.

edited Aug 10 '20 at 02:00

answered Aug 09 '20 at 10:10

dog

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score 3 · Answer 3 · edited Jun 09 '20 at 13:29

3

You actually have a typo in your connection string after Driver declaration. There is a double colon instead of a semicolon :)

Wrong:

{PostgreSQL UNICODE} : Server

Correct:

{PostgreSQL UNICODE} ; Server

edited Jun 09 '20 at 13:29

Avshalom

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answered Oct 12 '16 at 11:04

Michał Ziomek

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score 3 · Accepted Answer · edited Feb 01 '17 at 19:48

3

Check if the DSN exists in ODBC data source. If not you have to create one going to 'Control Panel', 'Admin. Tools', 'Data Sources (ODBC)'. Then select 'Add User DSN'- Select the PostgreSQL driver, and fill in your server and database details. Test connection to check is all ok!

edited Feb 01 '17 at 19:48

Vao Tsun

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answered Feb 09 '12 at 20:04

CB.

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score 2 · Answer 5 · answered Feb 14 '12 at 18:28

I found the problem, I thought the Postgresql ODBC driver was installed, but it wasn't. I finally got it to work after finding this site: http://code.google.com/p/visionmap/wiki/psqlODBC Then I followed the instructions above. it works.

Thanks for all the help.

Connect to remote PostgreSql database using Powershell

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