R help - Jul 2012 - why querying Sybase IQ using RODBC returns error ?

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=SharedMemory,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 



--
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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=SharedMemory,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.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
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