isIdCurrent {RSQLite} | R Documentation |
Support function that verifies that an dbObjectId holding a reference to a foreign object is still valid for communicating with the RDBMS
isIdCurrent(obj)
obj |
any dbObjectId (e.g., dbDriver ,
dbConnection , dbResult ).
|
dbObjectId
are R/S-Plus remote references to foreign (C code) objects.
This introduces differences to the object's semantics such as
persistence (e.g., connections may be closed unexpectedly),
thus this function provides a minimal verification to ensure
that the foreign object being referenced can be contacted.
a logical scalar.
dbDriver
dbConnect
dbSendQuery
dbGetQuery
fetch
## Not run: cursor <- dbSendQuery(con, sql.statement) isIdCurrent(cursor) ## End(Not run)