[R] Unwanted carriage returns storing dataframes with dbWriteTable

Hansruedi Baetschmann
Mon, 11 Aug 2008 12:01:37 -0000

If I save a dataframe with a character-typed last column to a relational
database with dbWriteTable, the  values in the last column of the
resulting table in the database will have a '\r' (carriage return)
appended. If I read back the dataframe with dbReadTable the last column
in the resulting dataframe has also '\r' appended (see protocol below).
Setting or unsetting sql-mode (in the SQL-Server Version 5.0) to or from
'NO_BACKSLASH_ESCAPE' has no effect on this behavour ? How can I avoid
these unwanted '\r'-tail ?

Hansruedi
 > df1
 a c
a 1 x
b 2 y
c 3 z
d 4 t
 > dbWriteTable(con,"df1",df1,row.names=FALSE)
[1] TRUE
 > df1=dbReadTable(con,"df1")
 > df1
 a   c
1 1 x\r
2 2 y\r
3 3 z\r
4 4 t\r
 >

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Hansruedi Baetschmann
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