SqlSave错误：无法追加到表

Question

Code:

sqlSave(SQL,data.frame(df),tablename='Data',append = TRUE,rownames = FALSE)

The table in which I am trying to insert the data has a primary key which is auto-increment. My table has a total of 5 columns including the primary key. In my data frame, I have 4 columns because I don't want to insert the PK myself. However, when I run the command, I get the following error:

Error in colnames<- ( *tmp* , value = c("BId", "name", "Set", : length of 'dimnames' [2] not equal to array extent

Also, when I insert the Primary key in the dataframe by myself, it still doesn't work.

Error in sqlSave(SQL, data.frame(df), tablename = "Data", : unable to append to table 'Data'

Answer 1

have a try safer = FALSE

the defination of sqlSave

if (!append) {
    if (safer) 
        stop("table ", sQuote(tablename), " already exists")
        ......
    }
    ......
if (safer) 
    stop("unable to append to table ", sQuote(tablename))

Answer 2

您可以使用use verbose参数获取实际的数据库错误。

sqlsave(con, df, verbose = T)