grid > source > query > select > join > columns
The <columns>
element wraps all the columns to be selected from a joined table that was specified with the <join table=”…”>
element.
It takes zero or more <column>
or <expression>
child elements.
(Note: the <columns>
element nested under <join>
works the same as the <columns>
element that is nested under <select>
).
If no join <columns>
are configured, no columns will be included in the result set from the joined table (this is different from the default <select>
columns).