Union
Stack the rows of a and b, by column name or position.
Stacks the rows of b under the rows of a. byName matches columns by name and the result is a's columns exactly: one missing from b arrives null, and one only in b is dropped without a word. Positional instead requires the two widths to match, and says so when they do not.
At a glance
Module type
Union
Category
Primitives · Dataframe
Default tier
reactive
Runs on
reactive, durable
Starts a flow
no
Holds a body
no
Keeps state between runs
no
Available in
every application type
Parameters
byName
boolean · required · defaults to true
Match columns by name. Off, they are matched by position.
Inputs
on
event
no
Implicit on every module that does not itself start a flow: wire an event here to make this module the start of what that event runs.
a
dataframe
yes
The first frame; its columns are the result's, in byName mode and positional alike.
b
dataframe
yes
The frame stacked underneath.
Outputs
output
dataframe
dataframe, signal
Both frames' rows, in that order.
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