similar to: Test if mysql connection is alive

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 >

Creating a temp table isn't completely intuitive with MySQL 5 and R 2.8..1, but it can be done. > library(RMySQL) Loading required package: DBI > con <- dbConnect(dbDriver("MySQL"), dbname = "foo", user="me",password="secret") > x<- data.frame(1:10) > colnames(x) <-c("x") > dbWriteTable(con, "#x", x,

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

Hi list, I have some trouble to setup RMySQL correctly to work with german umlaute: > library(RMySQL) Loading required package: DBI > pg <- dbDriver("MySQL") > con <- dbConnect(pg, username="dummy", host="localhost", password="", dbname="ga1prosp") > dbGetQuery(con, statement="SELECT * FROM K?rperma?e;") Error in

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 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

Hi All, Sorry to bother everyone again.Ofcourse Prof Ripley ,Yihui and Uwe had replied to my email.But this segmentation fault error was not solved.I agree with Prof Ripley,as he said my R and all other configurations,are very old.But what i don't understand is ,i was able to run analysis till few days before,and why suddenly this error. *The configuartions i use:---* *R-version * *>

I am trying to read a table from MySQL, I have loaded the file in "ts" database, in table name ACC. but i am unable to read it in R through getSymbol function. mysql> show databases; +--------------------------------+ | Database | +--------------------------------+ | information_schema | | mysql | | test | | ts

Hello everybody, could anybody give me a hint how to to use RMySQL and ROracle libraries at the same time without getting conflict with name spaces? Because it needs to much time, unloading and reloading the libraries is no solution... Example: ----------- snip ----------------- library(ROracle) library(RMySQL) mysql <- MySQL() con <- dbConnect(mysql, user=MySQL.name, password=MySQL.pwd,

Hi. I frequently use RMySQL package to interface R with MySQL databases. I was having a try with package DBI and I got the following error: > library(RMySQL) > library(DBI) > drv <- dbDriver("MySQL") > ch <- dbConnect(drv, dbname="mydb", user="myuser", password="mypasswd") > ibm <- dbGetQuery(ch,"select * from table where

Let'say we have a dataframe mydata with column v1. If mydata$v1 is passed to a function, is there way, then, to extract the name of the dataframe? What I now do is passing the name of the dataframe to the funcion, so passing two parameters. Maybe with mydata$v1 it is not possible, but with mydata['v1'] or mydata[,'v1'] it is? Thanks Frans ------------------- Frans Marcelissen

Dear list, I want to insert a recorde into a SQLite table by dbGetQuery(), but there is a problem when the value contains quotation mark. > dd<-data.frame(txt=c("having both ' and \" in character.","OK")) > library(RSQLite) Loading required package: DBI > con<-dbConnect(dbDriver("SQLite"),":memory:") >

I am extending a DBI connection by setClass("TSPostgreSQLConnection", contains=c("PostgreSQLConnection","TSdbOptions")) but the first time I use this I am getting a warning when it tries to coerce the TSPostgreSQLConnection to a PostgreSQLConnection. After the first use the warning stops, but the first warning is causing me problems when I do automatic checks

I got the following after running succesfully through this loop 28 million times... the loop opens text files in a directory and inserts line by line into a database... *** caught segfault *** address 0xc0000010, cause 'memory not mapped' Traceback: 1: .getGeneric(f, where, package) 2: getGeneric("coerce", where = where) 3: as(obj, "integer") 4:

(I am not sure if this is a bug or a request for a more understandable warning, or possible something obvious I should be posting on r-help.) I am trying to coerce an new class object to be a DBIConnection and it does not work the way I think it should: R version 2.5.1 (2007-06-27) ... > require("RMySQL") # or require("RSQLite") Loading required package: RMySQL Loading

Hi all, I have a quick question, I want to send a select statement to the mysql server. With the code below I connect and ask my select statement. As you can see from the code I want to have a mode = "+". The '+' needs to be free text and hence the "\"" around it. But it doesn't work. If i put just plus in instead of the 'mode' I get a table.

Hello, The code below works fine up until I try to use the "IN" statement in the last line. The proper SQL format is: SELECT * FROM this_table WHERE this_column IN (1,2,3,4,5) But, I think I may be getting something like: SELECT * FROM this_table WHERE this_column IN c(1,2,3,4,5) Which makes no sense in SQL. I think it may be just a matter of string massaging, but I'm not

Dear all, I'm trying to import a csv file into sqlite3 and from there into R. Everything looks fine exepct that R outputs the character values in an odd fashion: they are shown as "\"CHARACTER\"" instead of "CHARACTER", but only if I show the character variable as a vector. Does someone know why this happens? Below is a sample code. The first part is written in

Rjdbc consistently gives me an execution error with postgresql 9.0s JDBC4 driver. It's probably something trivial so am including my code below: library("RJDBC") param <- 249 param2 <- 188129 postgres <- JDBC("org.postgresql.Driver", ".m2/repository/postgresql/postgresql/9.0-801.jdbc4/postgresql-9.0-801.jdbc4.jar") con <- dbConnect(postgres,

Hi I just started with RMySQL. I have a database with roughly 12 millions rows/records and 8 columns/fields. From all 12 millions of records I want to import 3 fields only. The fields are specified as:id int(11), group char(15), measurement float(4,2). Why does this take > 1G RAM? I run R on suse linux, with 1G RAM and with the code below it even fills the whole 1G of swap. I just