| dbSendStatement {DBI} | R Documentation |
The dbSendStatement() method only submits and synchronously executes the
SQL data manipulation statement (e.g., UPDATE, DELETE,
INSERT INTO, DROP TABLE, ...) to the database engine. To query
the number of affected rows, call dbGetRowsAffected() on the
returned result object. You must also call dbClearResult() after
that. For interactive use, you should almost always prefer
dbExecute().
dbSendStatement(conn, statement, ...)
conn |
A DBIConnection object, as returned by
|
statement |
a character string containing SQL. |
... |
Other parameters passed on to methods. |
dbSendStatement() comes with a default implementation that simply
forwards to dbSendQuery(), to support backends that only
implement the latter.
dbSendStatement() returns
an S4 object that inherits from DBIResult.
The result set can be used with dbGetRowsAffected() to
determine the number of rows affected by the query.
Once you have finished using a result, make sure to clear it
with dbClearResult().
An error is raised when issuing a statement over a closed
or invalid connection,
if the syntax of the statement is invalid,
or if the statement is not a non-NA string.
No warnings occur under normal conditions.
When done, the DBIResult object must be cleared with a call to
dbClearResult().
Failure to clear the result set leads to a warning
when the connection is closed.
If the backend supports only one open result set per connection,
issuing a second query invalidates an already open result set
and raises a warning.
The newly opened result set is valid
and must be cleared with dbClearResult().
For queries: dbSendQuery() and dbGetQuery().
Other DBIConnection generics: DBIConnection-class,
dbDataType, dbDisconnect,
dbExecute, dbExistsTable,
dbGetException, dbGetInfo,
dbGetQuery, dbIsValid,
dbListFields, dbListResults,
dbListTables, dbReadTable,
dbRemoveTable, dbSendQuery,
dbWriteTable
con <- dbConnect(RSQLite::SQLite(), ":memory:") dbWriteTable(con, "cars", head(cars, 3)) rs <- dbSendStatement(con, "INSERT INTO cars (speed, dist) VALUES (1, 1), (2, 2), (3, 3);") dbHasCompleted(rs) dbGetRowsAffected(rs) dbClearResult(rs) dbReadTable(con, "cars") # there are now 6 rows dbDisconnect(con)