ROracle (version 1.2-2)

fetch-methods: Fetch records from a previously executed query

Description

This method is a straight-forward implementation of the corresponding generic function.

Usage

"fetch"(res, n = -1, ...)

Arguments

res

an OraResult object.

n

maximum number of records to retrieve per fetch. Use n = -1 to retrieve all pending records.

...

currently unused.

Value

number of records fetched from database.

References

For the Oracle Database documentaion see http://www.oracle.com/technetwork/indexes/documentation/index.html.

Details

The ROracle implementations retrieves only n records, and if n is missing it returns all records.

See Also

Oracle, dbConnect, dbSendQuery, dbGetQuery, dbClearResult, dbCommit, dbGetInfo, dbReadTable.

Examples

  ## Not run: 
#     drv <- dbDriver("Oracle")
#     con <- dbConnect(drv, "scott", "tiger")
#     res <- dbSendQuery(con, "select * from emp")
# 
#     # we now fetch the first 10 records from the resultSet into a data.frame
#     data1 <- fetch(res, n = 10)   
#     dim(data1)
# 
#     dbHasCompleted(res)
# 
#     # let's get all remaining records
#     data2 <- fetch(res, n = -1)
#   ## End(Not run)