similar to: Question on dbHasCompleted(...)

Dear all, I tried the following in R: >library(ROracle) >ora <- dbDriver("Oracle") >channel <- dbConnect(ora, user = "scott", password="tiger",dbname="abcdef") >rs <- dbSendQuery(channel, "select * from USArrests") >while(!dbHasCompleted(rs)) { xxx <- fetch(rs, n = 5000) } + + + > xxx Error: Object

Hello Simon, Hello everyone, I have a problem with retrieving database-queries chunkwise. In my query (Postgresql-Database, Postgres-Version 9.1) dbHasCompleted seems to always return TRUE. dbGetQuery works for smaller tables, but not for the whole query, since then a Heap-Overflow-Error will occur (and a Error: "java.lang.OutOfMemoryError: GC overhead limit exceeded" when trying to

Hi, first thanks to Sunny Ho (and David James for the pointer) for resolving the problem of the empty rows returned from ROracle. However, I have a problem still: > library(ROracle) > ora <- dbDriver("Oracle") > con <- dbConnect(ora, user = USER, password = PWD, dbname = DBNAME) > rs <- dbExecStatement(con, "select * from USER_TABLES") Error in

This code below produces empty XXX.png files - if I use plot(), it works and if I enter the commands png(filename=fn) bubble(positions, do.sqrt=FALSE, main=q) dev.off() manually, it works as well. I am lost - any help appreciated. The weird thing is that it worked before I made some changes... (I don't have a copy of the working version...). R version: platform i686-pc-linux-gnu arch

Hi, I use RMySQL to connect to MySQL server where I have a couple of stored procedures. I know that the function for the stored procedures "is not yet implemented", but I was trying to get around the problem connecting like that: drv <- dbDriver("MySQL") con <- dbConnect(drv,user=MyUser, password=MyPasswd, dbname=MyDBName, host=MyHost, client.flag="196608"

Dear R-users, I was able to make ROracle package to connect to the DB (Oracle91, 64bit, on Solaris). But after executing siple SQL query, "fetch" commaned gives me an empty dataframe. ### RORACLE INSTALATION PROCEDURE ### R CMD INSTALL --configure-args='--enable-extralibs' --enable-oracle32=no ~/tmp/ROracle_0.5-5.tar.gz #since we have 64bit Oracle9i instalation PROBLEM:

Hi all!! I would like to know if anyone has experienced this behaviour with ROracle package. I'm attaching information to reproduce the issue. Bug maybe? Thank you very much for your attention. Ramon. ################################################################## ################################################################## oraExecStatement BUG : RS-DBI driver: (ORA-02005:

I'm having trouble getting RMySQL to load. I was able to build it and install it (RMySQL_0.5-11.tar.gz). I was also able to build and install mysql-5.0.37. I've read many postings about this but have not found a mention of my particular problem (some closely related). I get the "unable to load shared library, no such file" error, but all the files do exist, RMySQL.so and

I don't use MySQL but I have seen messages like this before. They often have replies which indicate that you need to follow the instructions more closely. I suggest you search the list for these previous posts as I'm sure there is help there, somewhere! Tom > -----Original Message----- > From: Adriano von Sydow [mailto:pdasilva at xtra.co.nz] > Sent: Thursday, 10 March 2005 5:13

I'm trying to use RSQLite statement to cycle through a large database in "chunks" via the fetch(...,n=20000). As far as I can tell, however, it keeps re-fetching the same beginning set of rows -- any ideas what might be wrong with the following code? The select statement is pulling from multiple tables. I apologize in advance -- the DB is about 4gb so I can't make it easily

Hi all- I am stumped. The code in A. returns errors at lines 14 and 15 and fails to load series1 and series2. However, in B., if temp1 and temp2 are called again (which returns a "Table exists" error; see lines 14-17 in B.) series1 and series2 load correctly. Any ideas? Also-I am open to any suggestions to improve the code as I am a horrific programmer. Thanks A. 1 >

Hi, I just installed ROracle and RDBI. The connection to the database seems to work also. My problem is when I am selection rows that really exist in the database, it is returning nothing. Where should I look to see what could be my problem? Thank you very much, Mathieu > drv <- dbDriver("Oracle") > summary(drv, verbose=TRUE) <OraDriver:(6721)> Driver name:

Hello, I have trouble installing and loading the RMySQL package on OS X 2.8. The package seems to install from source fine (using R package manager from within the R environment). I have the following error when I try to load the package: loading package: RMySQL Error in dyn.load(x, as.logical(local), as.logical(now)) : unable to load shared library

I am trying to use R interfaced with MySQL. Present goal is that R should calculate the 85% quantile of AvgSpeed for each LinieID. Looking through documentation of the RMySQL Package, I guessed that dbApply would do the trick due to this example ## compute quanitiles for each network agent con <- dbConnect(MySQL(), group="vitalAnalysis") res <- dbSendQuery(con,

I am the maintainer of its, but not it's original author. One of the main strengths of its is that it uses POSIXct dates. Zoo has the flexibility of using almost any date format, but I don't know if the other date formats can store hour, min, sec data. You might want to do a little exploring with each before you commit. I'll be happy to give you a hand if you decide to work with

Hi everyone, I have been following these forums closely for the last few months but this is my first time posting. Basically I am trying to get an Oracle SQL Developer Binary Large Object(BLOB/CLOB) file in as an R object in R. For those not familiar with a BLOB/CLOB file, it is basically lik a table that has cells that contain tables or files. By converting the large table into a BLOB/CLOB file

Dear R-users, I am working with a colleague on extracting and processing data from our Oracle database using R scripts. We performed some initial testing using functions available in the ROracle package. Overall, our tests were successful and encouraging. There are however a couple of questions/problems which I'd like to submit to your attentions: 1- the current version of ROracle appears to

Dear R-Users, I need a very fast and reliable database solution so I try to serialize a data.frame (to binary data) and to store this data to an SQLite database. This is what I tried to do: library(RSQLite) con <- dbDriver("SQLite") db <- dbConnect(con, "test") dbSendQuery(db, 'CREATE TABLE frames("simID" INT, "data" BLOB)') data.bin <-

Sorry for posting the second time, I corrected the SQL code: PROBLEM: after executing simple statement, from within R, "fetch" function gives me the empty dataframe: ### CONNECTION, and SQL QUERY EXECUTION > ora <- dbDriver("Oracle") > con <- dbConnect(ora, "rado/only2admin" > dbListTables(con) character(0) > rs <- dbSendQuery(con,

Hi, I recently upgraded to R 2.9.0 on linux x86. After doing so, I switched to the RPostgreSQL package for interfacing with a postgresql database. I am using postgresql 8.3.7. A query that works from the postgresql terminal is causing a segfault when executed from R. My sessionInfo, the error message, and the R code used to generate the error are listed below. I have noticed that a