isPostgresqlIdCurrent: Check whether a database handle object is valid or not

Description Usage Arguments Details Value See Also Examples

Description

Support function that verifies that an object holding a reference to a foreign object is still valid for communicating with the RDBMS

Usage

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Arguments

obj

any dbObject (e.g., dbDriver, dbConnection, dbResult).

Details

dbObjects are R/S-Plus remote references to foreign 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.

Value

a logical scalar.

See Also

dbDriver dbConnect dbSendQuery fetch

Examples

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## Not run: 
cursor <- dbSendQuery(con, sql.statement)
isIdCurrent(cursor)

## End(Not run)

RPostgreSQL documentation built on May 2, 2019, 8:49 a.m.