[R] why querying Sybase IQ using RODBC returns error ?
Alok Jadhav
alok.jadhav at credit-suisse.com
Mon Jul 30 06:51:27 CEST 2012
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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