similar to: RMySQL on Mac OS 10.4

Hi, useR- In RMySQL, how do I overwrite records? (equivalent to "replace" query). For example, suppose that dat2 is a newer data.frame than dat1. con <- dbConnect(MySQL()) res <- dbWriteTable(con, "DBname", dat1, row.names=F, append=T, replace=T) res <- dbWriteTable(con, "DBname", dat2, row.names=F, append=T, replace=T) This would not update/replace the

I am using R 2.8 and the latest versions of RMySQL on a Windows XP 64 bit machine. I was wondering if someone could help me figure out how to use dbWriteTable without inserting \r into my table. Consider the following code snippet, which is run after I connect to my database. myDFOut = dbReadTable(conn, "myDF") print(myDFOut) myDFIn = data.frame(x=paste("x", 1:5, sep =

Hi All, I've finally gotten around to database access using R. I'm happily extracting rows from a MySQL database using RMySQL, but am having problems appending rows to an existing table. What I *want* to do is to append rows to the table, allowing the database to automatically generate primary key values. I've only managed to add rows by using dbWriteTable( con,

Hi, I'm using R 1.9.0 with RMySQL 0.5-4 and MySQL 3.23.55 on a suse 8.2 box. I have a simulation study and (as usual for newbies in simulation, I guess) I have a lot of data that I want to store in MySQL. I want to write an R script that reads data from RData files and writes it to a MySQL database. I read some R documents (R Data Import/Export and DSC papers) but I'm finding

I am feeling rather dumb right now. I created what I thought was a data.frame as follows: aaa <- lapply(split(moreinfo,list(moreinfo$m_id),drop = TRUE), fun_m_id) m_id_default_res <- do.call(rbind, aaa) print("==========================================") m_id_default_res print("==========================================") ndf <- m_id_default_res[, c('mid',

Hello, I am trying to insert data in a data.frame into a database table using the RMySQL package m <- dbDriver("MySQL") con <- dbConnect(m, host = "blah", user = "blah", password = "blah", dbname = "blah") proid <- dbGetQuery(con, "select max(processed_data_id)+1 from processed_data") spot <-

Hi, I have a question reading using RMySQL trying to load one R vector into a table column. To be more specifically, the table is there populated. Now I add a new column and want to populate this. Can some colleagues on this list teach me how to do this? I know how to write one R object/table into MYSQL table using dbWriteTable. But in this situation, I just want to do one column. Thanks

I have a data.frame obj with 5 columns whose colnames match the fields in my "contact" table. The only other field my MySQL table has is an id field which is the PK and is set to auto increment. I'd like to load this data.frame using something like: dbWriteTable(con, "contact", dat, append=TRUE) However, I get this error: Error in mysqlExecStatement(conn, statement,

I'm having some problems with valid field names when using RMySQL to interface R (version 1.7.0, under RedHat9.0), to MySQL (4.1.0-alpha). I think I've spotted the problem and a solution (which is working for me), but I wanted to share this with you as I may be missing something. (Note: I'm aware that this is an old R version, but I've checked the code of the lastest version of

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, The problem was the row.names that were sent to the database and created an primary key duplicate. Now it works fine. BTW congratulations for the package. It copied 15300 rows by 11 columns in less than 5 seconds, in my PIII 833 with 1 GB RAM. > system.time(dbWriteTable(con, "TBL_SIMDATA", TBL.SIMDATA, append = TRUE, row.names=F)) [1] 3.87 0.05 4.86 0.01 0.00 Just one

Hi I'm new to R and have been resisting posting to the list thus far, but I think I've exhausted my work around options. I'm having a few problems with RMySQL and/or it's underlying packages. I'm doing a very simple vsn transformation on large datasets, using RMySQL to retrieve the data for a DB. My first problem was that I could not get the RMySQL package to write

Dear Rusers, I am trying to feed my database with data from a file. But since my file (2010101000.txt) there`s no headers I am facing problem because the result data.frame is not separated my columns. How could I set variables names for each columns in *dbWriteTable*? I have tried the command below but I don`t know how to fill the *field.type*option. dbWriteTable(con, "b20101010",

Dear colleague, I have two data frame which I tried to use dbWriteTable function with append=TRUE to write to the mysql database. The problem is that if I am run my R script directly then it is fine. Both data frame got written into the database. But when I tried to embed the script to be called as system("R --save < whatever.R") in my perl script, I saw very strange things. One

I have a table (contact) with several fields and it's PK is an auto increment field. I'm bulk loading data to this table from files which if successful will be about 3.5million rows (approx 16000 rows per file). However, I have a linking table (an_contact) to resolve a m:m relationship between the an and contact tables. How can I retrieve the PK's for the data bulk loaded into

There is a little problem in handling logicals in RMySQL: # here is the MySQL connection > con <MySQLConnection:(1816,0)> # here is the data frame > print(a<-data.frame(x=c(TRUE,FALSE),y=c(FALSE,TRUE))) x y 1 TRUE FALSE 2 FALSE TRUE # as promised, the two data frame columns are identified as logicals and # the field types are set to tinyint > field.types <-

Dear R-users, First, thank you to the developers for the very useful R-library RMySQL. While using this library a recieved an error message: RS-DBI driver: (could not run statement: Too many columns) The statement that generated the error was: dbWriteTable(dbcon, "simdataseries", template, overwrite = TRUE, row.names = FALSE ) I am assuming this is a RMySQL rather than MySQL limit.

I have R 2.10.1 and 2.9.1 installed, and both have RMySQL packages installed. I script I'd developed using an older version (2.8.?, I think) used RMySQL too and an older version of MySQL (5.0.?), and worked fine at that time (about a year and a half ago +/- a month or two). But now, when I run it again, on new data, the script works fine until it is supposed to store its results in my DB.

Hi there. I see in a post from 2002 that you got the following problem with RMySQL: > con <- dbConnect(m) Process R segmentation fault at Wed Aug 28 08:21:11 2002 I have the same problem today: drv=dbDriver("MySQL") dbConnect(drv) # or with pretty much any other failing options Program received signal SIGSEGV, Segmentation fault. 0x00002b28d60c9fa0 in strlen () from

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