Update check constraint docs for MySQL support (#9803)

This is now supported as of version 8.0.16
https://dev.mysql.com/doc/refman/8.0/en/create-table-check-constraints.html

diff --git a/doc/build/core/constraints.rst b/doc/build/core/constraints.rst
index 1efccdce5a4c685445c7343055e9eec72083fa8d..a147ea359f3f8bb2fc4d896137be29d52a40eb63 100644 (file)
--- a/doc/build/core/constraints.rst
+++ b/doc/build/core/constraints.rst
@@ -357,7 +357,7 @@ constraints generally should only refer to the column to which they are
 placed, while table level constraints can refer to any columns in the table.
 
 Note that some databases do not actively support check constraints such as
-MySQL.
+older versions of MySQL (prior to 8.0.16).
 
 .. sourcecode:: python+sql