dbIsValid {DBI} | R Documentation |
This generic tests whether a database object is still valid (i.e. it hasn't been disconnected or cleared).
dbIsValid(dbObj, ...)
dbObj |
An object inheriting from |
... |
Other arguments to methods. |
a logical of length 1
Other DBIDriver generics: DBIDriver-class
,
dbConnect
, dbDataType
,
dbDriver
, dbGetInfo
,
dbListConnections
Other DBIConnection generics: DBIConnection-class
,
dbDataType
, dbDisconnect
,
dbExecute
, dbExistsTable
,
dbGetException
, dbGetInfo
,
dbGetQuery
, dbListFields
,
dbListResults
, dbListTables
,
dbReadTable
, dbRemoveTable
,
dbSendQuery
, dbSendStatement
Other DBIResult generics: DBIResult-class
,
SQL
, dbBind
,
dbClearResult
, dbColumnInfo
,
dbFetch
, dbGetInfo
,
dbGetRowCount
,
dbGetRowsAffected
,
dbGetStatement
,
dbHasCompleted
dbIsValid(RSQLite::SQLite()) con <- dbConnect(RSQLite::SQLite(), ":memory:") dbIsValid(con) rs <- dbSendQuery(con, "SELECT 1") dbIsValid(rs) dbClearResult(rs) dbIsValid(rs) dbDisconnect(con) dbIsValid(con)