Plans a Restrict before the input with more columns that keeps only the
other input's columns, when those are all in it, by name and in the same
order. undefined when the inputs have as many columns, or the narrower
input has none, or its names aren't in the wider one in order, or the
Concat still isn't valid after it (its types differ, or can't be converted
when it converts types).
Plans a Restrict before the input with more columns that keeps only the other input's columns, when those are all in it, by name and in the same order.
undefinedwhen the inputs have as many columns, or the narrower input has none, or its names aren't in the wider one in order, or the Concat still isn't valid after it (its types differ, or can't be converted when it converts types).