| 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)