tableDescription: Build a nice description of a table.

In WinVector/replyr: Patches to Use 'dplyr' on Remote Data Sources

Description

Please see http://www.win-vector.com/blog/2017/05/managing-spark-data-handles-in-r/ for details. Note: one usually needs to alter the keys column which is just populated with all columns.

Usage

tableDescription(tableName, handle, ..., keyInspector = key_inspector_all_cols)

Arguments

tableName	name of table to add to join plan.
handle	table or table handle to add to join plan (can already be in the plan).
...	force later arguments to bind by name.
keyInspector	function that determines preferred primary key set for table.

Details

Please see vignette('DependencySorting', package = 'replyr') and vignette('joinController', package= 'replyr') for more details.

Value

table describing the data.

See Also

buildJoinPlan, keysAreUnique, makeJoinDiagramSpec, executeLeftJoinPlan

Examples

d <- data.frame(x=1:3, y=NA)
tableDescription('d', d)

WinVector/replyr documentation built on Oct. 22, 2020, 8:07 p.m.