具有ROBDC的R Teradata易失表

Question

我一直在尝试找出如何将数据帧写入Teradata服务器上的易失性表中。我试图遵循this example，但运气不佳。

这是我的尝试：

pass = getPass(msg = "Network Password:")
edv = odbcConnect(dsn = "", uid = "", pwd = pass)
rm(pass)

# So I believe we'll first have to create a table:
quer1 = paste("CREATE VOLATILE TABLE testdat",
               "(op_sys INT, enter_final_icu VARCHAR(20), mrn VARCHAR(8))",
               "UNIQUE PRIMARY INDEX(op_sys)",
               "ON COMMIT PRESERVE ROWS;")
sqlQuery(edv, quer1)

# This returns a zero row table, so far so good:
quer2 = "select top 10 * from testdat"
sqlQuery(edv, quer2)

# See if we can save the data:
columnTypes <- list(op_sys = "INT", 
                    enter_final_icu = "VARCHAR(20)", 
                    mrn = "VARCHAR(8)")
# pop is a data.frame with 3 the same 3 columns as in the definition of testdat
sqlSave(channel = edv, 
        dat = pop, 
        tablename = 'testdat', 
        append = TRUE, 
        rownames = FALSE, 
        varTypes = columnTypes)


sqlUpdate(channel = edv, 
        dat = pop, 
        tablename = 'testdat')

sqlSave语句告诉我“表testdat已存在”，这是我想做的。我以为update = TRUE可以让我向表中添加数据...

sqlUpdate语句告诉我“ testdat：未找到表”，考虑到我能够查询它，这很奇怪。

任何建议将不胜感激，谢谢！