dbSendUpdate {MonetDB.R} | R Documentation |
Send a data-altering SQL statement to the database.
Description
dbSendUpdate
is used to send a data-altering statement to a MonetDB database,
e.g. CREATE TABLE
or INSERT
. As a convenience feature, a placeholder
(?
character) can be used in the SQL statement, and bound to parameters given
in the varargs group before execution. This is especially useful when scripting
database updates, since the parameters will be automatically quoted.
The dbSendUpdateAsync
function is used when the database update is called from
finalizers, to avoid very esoteric concurrency problems. Here, the update is not guaranteed
to be immediately run. Also, the method returns immediately.
Usage
dbSendUpdate( conn, statement, ..., async=FALSE )
Arguments
conn |
A MonetDB.R database connection. Created using |
statement |
A SQL statement to be sent to the database, e.g. 'UPDATE' or 'INSERT'. |
... |
Parameters to be bound to '?' characters in the query, similar to JDBC. |
async |
Behave like |
Value
Returns TRUE
if the update was successful.
See Also
Examples
## Not run:
# connect to MonetDB
conn <- dbConnect(MonetDB.R(), "monetdb://localhost/acs")
# create table
dbSendUpdate(conn, "CREATE TABLE foo(a INT,b VARCHAR(100))")
# insert value, bind parameters to placeholders in statement
dbSendUpdate(conn, "INSERT INTO foo VALUES(?,?)", 42, "bar")
## End(Not run)