dplyr_join {dm}

dplyr join methods for zoomed dm objects

Description

Use these methods without the '.dm_zoomed' suffix (see examples).

Usage

## S3 method for class 'dm_zoomed'
left_join(x, y, by = NULL, copy = NULL, suffix = NULL, select = NULL, ...)

## S3 method for class 'dm_keyed_tbl'
left_join(x, y, by = NULL, copy = NULL, suffix = NULL, ..., keep = FALSE)

## S3 method for class 'dm_zoomed'
inner_join(x, y, by = NULL, copy = NULL, suffix = NULL, select = NULL, ...)

## S3 method for class 'dm_keyed_tbl'
inner_join(x, y, by = NULL, copy = NULL, suffix = NULL, ..., keep = FALSE)

## S3 method for class 'dm_zoomed'
full_join(x, y, by = NULL, copy = NULL, suffix = NULL, select = NULL, ...)

## S3 method for class 'dm_keyed_tbl'
full_join(x, y, by = NULL, copy = NULL, suffix = NULL, ..., keep = FALSE)

## S3 method for class 'dm_zoomed'
right_join(x, y, by = NULL, copy = NULL, suffix = NULL, select = NULL, ...)

## S3 method for class 'dm_keyed_tbl'
right_join(x, y, by = NULL, copy = NULL, suffix = NULL, ..., keep = FALSE)

## S3 method for class 'dm_zoomed'
semi_join(x, y, by = NULL, copy = NULL, suffix = NULL, select = NULL, ...)

## S3 method for class 'dm_keyed_tbl'
semi_join(x, y, by = NULL, copy = NULL, ...)

## S3 method for class 'dm_zoomed'
anti_join(x, y, by = NULL, copy = NULL, suffix = NULL, select = NULL, ...)

## S3 method for class 'dm_keyed_tbl'
anti_join(x, y, by = NULL, copy = NULL, ...)

## S3 method for class 'dm_zoomed'
nest_join(x, y, by = NULL, copy = FALSE, keep = FALSE, name = NULL, ...)

Arguments

x, y

tbls to join. x is the dm_zoomed and y is another table in the dm.

by

If left NULL (default), the join will be performed by via the foreign key relation that exists between the originally zoomed table (now x) and the other table (y). If you provide a value (for the syntax see dplyr::join), you can also join tables that are not connected in the dm.

copy

Disabled, since all tables in a dm are by definition on the same src.

suffix

Disabled, since columns are disambiguated automatically if necessary, changing the column names to table_name.column_name.

select

Select a subset of the RHS-table's columns, the syntax being select = c(col_1, col_2, col_3) (unquoted or quoted). This argument is specific for the join-methods for dm_zoomed. The table's by column(s) are automatically added if missing in the selection.

...

see dplyr::join

keep

Should the new list-column contain join keys? The default will preserve the join keys for inequality joins.

name

The name of the list-column created by the join. If NULL, the default, the name of y is used.

Examples

flights_dm <- dm_nycflights13()
dm_zoom_to(flights_dm, flights) %>%
  left_join(airports, select = c(faa, name))

# this should illustrate that tables don't necessarily need to be connected
dm_zoom_to(flights_dm, airports) %>%
  semi_join(airlines, by = "name")