asdf2014 commented on code in PR #14978:
URL: https://github.com/apache/druid/pull/14978#discussion_r1326864233
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docs/querying/datasource.md:
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@@ -320,12 +320,14 @@ Join datasources allow you to do a SQL-style join of two
datasources. Stacking j
you to join arbitrarily many datasources.
In Druid {{DRUIDVERSION}}, joins in native queries are implemented with a
broadcast hash-join algorithm. This means
-that all datasources other than the leftmost "base" datasource must fit in
memory. It also means that the join condition
-must be an equality. This feature is intended mainly to allow joining regular
Druid tables with [lookup](#lookup),
-[inline](#inline), and [query](#query) datasources.
+that all datasources other than the leftmost "base" datasource must fit in
memory. In native queries, the join condition
+must be an equality. In SQL, any join condition is accepted, but only
equalities of a certain form
+(see [Joins in SQL](#joins-in-sql) execute as part of a native join. Other
kinds of conditions execute as a cross join
Review Comment:
```suggestion
(see [Joins in SQL](#joins-in-sql)) execute as part of a native join. Other
kinds of conditions execute as a cross join
```
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