[R] why querying Sybase IQ using RODBC returns error ?
Jadhav, Alok
alok.jadhav at credit-suisse.com
Tue Jul 31 01:57:00 CEST 2012
Thanks Prof Ripley. I found the workaround quickly. I had read the
documentation while searching for connection string but did not look for
below specific issue. Lesson learnt.
Regards,
Alok
-----Original Message-----
From: Prof Brian Ripley [mailto:ripley at stats.ox.ac.uk]
Sent: Monday, July 30, 2012 3:05 PM
To: Jadhav, Alok
Cc: r-help at r-project.org
Subject: Re: [R] why querying Sybase IQ using RODBC returns error ?
This is a known bug in Sybase's ODBC driver, and yes, the workarounds
are documented in the package. Have you actually read the
documentation?
On 30/07/2012 05:51, Alok Jadhav wrote:
> Hello,
>
> I am not able to query Sybase IQ database from R using RODBC
package.
> Check the below code
>
> R> sybaseiq.query <- function (sql, ..., as.is = FALSE)
> {
> connstr <- "Driver={Sybase
>
IQ};UID=ajadhav2;PWD=*****;ServerName=PSGSESHR01A_IQ;CommLinks=SharedMem
ory,TCPIP{host=psgseshr01_iq.sg.csfb.com;port=3051}"
> chan <- odbcDriverConnect(connstr)
> on.exit(odbcClose(chan))
> if (length(list(...)) > 0)
> sql <- sprintf(sql, ...)
> x <- sqlQuery(chan, sql, as.is = as.is)
> return(x)
> }
> R>
> R>
> R>
> R> x <- sybaseiq.query("select * from syagprd1.orders where
> tradedate='120727' and acct='DVW'")
> Error in .Call(C_RODBCFetchRows, attr(channel, "handle_ptr"), max,
buffsize,
> :
> negative length vectors are not allowed
> R> x
> [1] "42000 -131 [Sybase][ODBC Driver][Sybase IQ]Syntax error near
'order' on
> line 1"
> [2] "[RODBC] ERROR: Could not SQLExecDirect 'select * from
syagprd1.order
> where tradedate='120727' and acct='DVW' and ptag=-1 and sym='BHP.AX''"
>
>
> This is same behavior for empty datasets also
>
> R> x <- agora.query.iq("select * from syagprd1.orders where 1=2")
> Error in .Call(C_RODBCFetchRows, attr(channel, "handle_ptr"), max,
buffsize,
> :
> negative length vectors are not allowed
>
> I am not sure what is wrong. Are their some arguments I need to know
while I
> create chan to resolve this issue?
>
> Thanks for your help in advance.
>
> Regards,
> Alok
>
>
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/why-querying-Sybase-IQ-using-RODBC-returns
-error-tp4638297.html
> Sent from the R help mailing list archive at Nabble.com.
>
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http://www.R-project.org/posting-guide.html
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>
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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