RMySQL (version 0.10.17)

isIdCurrent: Check if a database object is valid.

Description

Support function that verifies that an object holding a reference to a foreign object is still valid for communicating with the RDBMS. isIdCurrent will be deprecated in the near future; please use the dbIsValid() generic instead.

Usage

isIdCurrent(obj)
# S4 method for MySQLDriver
dbIsValid(dbObj)
# S4 method for MySQLConnection
dbIsValid(dbObj)
# S4 method for MySQLResult
dbIsValid(dbObj)

Arguments

dbObj,obj

A MysqlDriver, MysqlConnection, MysqlResult.

Value

a logical scalar.

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.

Examples

# NOT RUN {
dbIsValid(MySQL())
# }