dbSendUpdate: Send a data-altering SQL statement to the database.

In MonetDB.R: Connect MonetDB to R

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 dbConnect with the MonetDB.R database driver.
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 dbSendUpdateAsync? Defaults to FALSE.

Value

Returns TRUE if the update was successful.

See Also

dbSendQuery

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)

MonetDB.R documentation built on May 2, 2019, 5:26 p.m.