tdExists: tdExists

In tranlm/tdR: Teradata interaction and query package

Description

Determines if Teradata table exists. Can take a JDBC connection object (conn) if provided. If no JDBC connection is provided, then a connection is attempted using the user, and password provided. If none is provided, then tries to locate a connection object (conn) in the global environment.

If a connection profile (e.g. username, password, etc.) is provided, then an attempt is made to connect to Teradata. Once the query is run, the connection is then closed. If a connection object (conn) is provided to the function (or one is found globally), then the connection remains open.

Usage

tdExists(table = NULL, ...)

Arguments

table	String vector of name of table to get column names from.
...	Optional connection settings.

Details

This function looks in the DBC.COLUMNS table to determine whether the Teradata table exists.

Value

Returns a boolean indicator of either TRUE if table exists or FALSE if table does not.

See Also

tdConn for connection, tdDisk for disk usage, tdSpool for spool usage, tdCpu for CPU usage, and tdJoin for joining tables.

Examples

## NOT RUN (will also result in errors due to user restrictions) ##
## Runs a quick query based on connection profile
# tdExists("ICDB_PERSON", username=<username>, password=<password>, db="GCA")

## Runs query using a separately established connection
# conn = tdConn(<username>, <password>, db="GCA")
# tdExists("ICDB_PERSON", conn=conn)

## Uses same connection, but allows code to find globally.
# tdExists("ICDB_PERSON")

tranlm/tdR documentation built on May 31, 2019, 7:45 p.m.