Dear Jeff
I appreciate your reply.
My PostgreSQL is deployed on Amazon RDS, so the password of PostgreSQL is
random and has various reserved characters.
I don't know if the reserved characters below are complete, and there are some
characters (e.g. * , $) I tried without problems.
Could you tell me which characters require percent-encoding for PostgreSQL
password?
space → %20
! → %21
" → %22
# → %23
$ → %24
% → %25
& → %26
' → %27
( → %28
) → %29
* → %2A
+ → %2B
, → %2C
- → %2D
. → %2E
/ → %2F
: → %3A
; → %3B
< → %3C
= → %3D
> → %3E
? → %3F
@ → %40
[ → %5B
\ → %5C
] → %5D
^ → %5E
_ → %5F
` → %60
{ → %7B
| → %7C
} → %7D
~ → %7E
Kind regards,
gzh
At 2022-10-12 22:01:15, "Jeffrey Walton" <noloa...@gmail.com> wrote:
>On Wed, Oct 12, 2022 at 7:16 AM gzh <gzhco...@126.com> wrote:
>>
>> I found that the password can't contain the % character, and the other
>> special characters (* , $) are no problem.
>
>You need to percent-encode the password if you wish to use the %
>symbol in the password. There are other reserved characters that you
>should percent-encode. See
>https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-CONNSTRING
>and https://www.rfc-editor.org/rfc/rfc3986#section-2.1 .
>
>Jeff
>
>> At 2022-10-12 16:28:51, "gzh" <gzhco...@126.com> wrote:
>>
>>
>> PostgreSQL version: 13.5
>>
>> Operating system: windows 10
>>
>> Description:
>>
>>
>> I wrote a VBA application to connect to PostgreSQL database by psqlodbc.
>>
>> The application works fine when there are no special characters in the
>> password.
>>
>> When the password contains special characters (e.g. * , $ %),
>>
>> the application responds with an error below:
>>
>>
>> Number: -2147467259
>>
>> Description: password authentication failed for user 'testdb'
>>
>>
>> I made an sample as below:
>>
>>
>> VBA
>>
>> ----------------------------- START ---------------------------------
>>
>>
>> Sub dbconnTest()
>>
>> Dim rs As ADODB.Recordset
>>
>> Dim sql As String
>>
>> Dim i As Integer
>>
>> Dim rcnt As Integer
>>
>>
>>
>> Set cnn = New ADODB.Connection
>>
>> cnn.Open "Provider=MSDASQL;Driver=PostgreSQL
>> Unicode;UID=postgres;port=5432;Server=localhost;Database=testdb;PWD=Gd*oB,$3Ln%pQ"
>>
>>
>>
>> Set rs = New ADODB.Recordset
>>
>> sql = "SELECT * FROM testtbl"
>>
>>
>>
>> rs.ActiveConnection = cnn
>>
>> rs.Source = sql
>>
>> rs.Open
>>
>>
>>
>> cnt = rs.Fields.Count
>>
>> rcnt = 2
>>
>>
>>
>> Do Until rs.EOF
>>
>> For i = 0 To cnt - 1
>>
>> Cells(rcnt, i + 1).Value = rs.Fields(i)
>>
>> Next
>>
>>
>>
>> rcnt = rcnt + 1
>>
>> rs.MoveNext
>>
>> Loop
>>
>>
>>
>> Set rs = Nothing
>>
>> Set cnn = Nothing
>>
>> End Sub
>>
>>
>> ----------------------------- END ---------------------------------
>>
>>
>>
>> Thanks for any help!
>>
