restrict.metadata.info: Filtering the metadata.info

In cezden/rpostgrexplorer: Simplification of analysis in PostgreSQL and Redshift DBs

Description

The function provides a mechanism for restricting the metadata.info object.

Usage

## S3 method for class 'metadata.info'
restrict(meta.inf, restr.obj)

Arguments

meta.inf	the metadata.info object to be restricted
restr.obj	description of the restriction

Details

It can be provided with:

• subset of rows or columns from the result of db.attributes function

• subset of rows or columns from the result of db.tables function

As a result new metadata.info object is created matching the filtering criteria

Value

restricted metadata.info object

Examples

db.atts <- db.attributes(meta.inf)
# let's select attributes with more than 100 instances
db.atts.cnt <- db.attributes.counts(meta.inf)  %>% dplyr::filter(tablecount>100)
meta.inf.restr <- restrict(meta.inf, db.atts.cnt)

cezden/rpostgrexplorer documentation built on May 13, 2019, 3:08 p.m.