Logical-methods {PivotalR} | R Documentation |
db.obj
objectsThese binary operators perform logical operations on
db.obj
objects
## S4 method for signature 'db.obj' ## S4 method for signature 'db.obj' !x ## S4 method for signature 'db.obj,db.obj' e1 & e2 ## S4 method for signature 'db.obj,db.obj' e1 | e2 ## S4 method for signature 'db.obj,logical' e1 & e2 ## S4 method for signature 'db.obj,logical' e1 | e2 ## S4 method for signature 'logical,db.obj' e1 & e2 ## S4 method for signature 'logical,db.obj' e1 | e2
e1, e2 |
logical or |
x |
|
db.Rquery
object, which contains the SQL query
that computes the logical operations.
A meaningful expression is generated only when the
.col.data_type
is "boolean", otherwise a "NULL" value is
generated.
Author: Predictive Analytics Team at Pivotal Inc.
Maintainer: Frank McQuillan, Pivotal Inc. fmcquillan@pivotal.io
db.Rquery
contains a SQL query that does the
operations.
## Not run: ## get the help for a method ## help("|,db.obj,db.obj-method") ## 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) ## create a table from the example data.frame "abalone" x <- as.db.data.frame(abalone, conn.id = cid, verbose = FALSE) lk(x$rings[x$length > 10 & x$height < 2,]) db.disconnect(cid, verbose = FALSE) ## End(Not run)