PostgreSQL中使用R的\\ copy语句

Question

I want to execute the following statement on postgresql sending it from R:

tname = 'foo'
con = some_connection_to_postgresql
q = paste("\\COPY", tname, "FROM 'foo.csv';")
dbGetQuery(con, q)

However, when I execute it, I get the following error:

Error: <SQL> '\COPY foo FROM 'foo.csv''
    nanodbc/nanodbc.cpp:1587: 42601: ERROR: syntax error at or near "\";
Error while executing the query

However, the same script written from the terminal works perfectly fine.

Answer 1

\\copy is not a postgresql statement. the psql CLI converts \\copy ... from filename into copy ... from stdin; and then pipes the file's contents over the postgres connection.

you'll have to do the same if you want to use copy.