Update datasource.md (#10864)
* Update datasource.md
Change "table" to "datasource" in join discussion: This means that all datasources
other than the leftmost "base" table must fit in memory.
According to docs on datasources, "datasource" is the more general term, and a table is a kind of datasource. In the context here, then, "datasource" is applicable.
* left-hand table -> left-hand datasource
Co-authored-by: Charles Smith <38529548+techdocsmith@users.noreply.github.com>
Co-authored-by: sthetland <steve.hetland@imply.io>
Co-authored-by: Charles Smith <38529548+techdocsmith@users.noreply.github.com>
diff --git a/docs/querying/datasource.md b/docs/querying/datasource.md
index 9555f36..8fd121d 100644
--- a/docs/querying/datasource.md
+++ b/docs/querying/datasource.md
@@ -289,8 +289,8 @@
Join datasources allow you to do a SQL-style join of two datasources. Stacking joins on top of each other allows
you to join arbitrarily many datasources.
-In Druid {{DRUIDVERSION}}, joins are implemented with a broadcast hash-join algorithm. This means that all tables
-other than the leftmost "base" table must fit in memory. It also means that the join condition must be an equality. This
+In Druid {{DRUIDVERSION}}, joins 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.
