clean.madlib.temp: Delete all the result tables created during calculations of...

In PivotalR: A Fast, Easy-to-Use Tool for Manipulating Tables in Databases and a Wrapper of MADlib

Description

Some MADlib wrapper functions create result tables that cannot be dropped in the background, because other functions need to use these tables. For example, madlib.arima creates 3 result tables, which are needed by predict.arima.css.madlib. One can manually delete these 3 tables when they are not useful anymore using delete,arima.css.madlib-method. One can also choose to all such tables created by many such functions together using this function.

Usage

clean.madlib.temp(conn.id = 1)

Arguments

conn.id

An integer, the connection ID of the database. See db.connect for more details.

Details

All such result tables created by MADlib wrapper functions start with "__madlib_temp_" followed by three random integers. This function deletes all such tables.

Author(s)

Author: Predictive Analytics Team at Pivotal Inc.

Maintainer: Frank McQuillan, Pivotal Inc. [e-mail]

See Also

madlib.arima creates three tables with names starting with "__madlib_temp_" when it fits ARIMA model to time series

delete,arima.css.madlib-method deletes the result of madlib.arima together with the model, residual and statistics tables.

Examples

## Not run: 


## set up the database connection
## Assume that .port is port number and .dbname is the database name
cid <- db.connect(port = .port, dbname = .dbname, verbose = FALSE)

## use double values as the time stamp
## Any values that can be ordered will work
example_time_series <- data.frame(
    id = seq(0,1000,length.out=length(ts)),
    val = arima.sim(list(order=c(2,0,1),
    ar=c(0.7, -0.3), ma=0.2), n=1000000) + 3.2)

x <- as.db.data.frame(example_time_series, field.types =
                      list(id="double precision", val = "double precision"),
                      conn.id = cid, verbose = FALSE)

dim(x)

names(x)

## use formula
s <- madlib.arima(val ~ id, x, order = c(2,0,1))

s

## delete all result tables
clean.madlib.temp(conn.id = 1)

## s still exists but the 3 tables (model, residuals, etc.) are deleted
s

db.disconnect(cid, verbose = FALSE)

## End(Not run)

PivotalR documentation built on March 13, 2021, 1:06 a.m.