Document predicate pushdown support for string-type columns in SQL Se…

…rver
trinodb · Apr 3, 2023 · e5ffe5a · e5ffe5a
1 parent 068f74a
commit e5ffe5a
Showing 1 changed file with 16 additions and 1 deletion.
diff --git a/docs/src/main/sphinx/connector/sqlserver.rst b/docs/src/main/sphinx/connector/sqlserver.rst
@@ -480,7 +480,22 @@ The connector supports pushdown for a number of operations:
 
 .. include:: join-pushdown-enabled-true.fragment
 
-.. include:: no-pushdown-text-type.fragment
+Predicate pushdown support
+""""""""""""""""""""""""""
+
+The connector supports pushdown of predicates on ``VARCHAR`` and ``NVARCHAR``
+columns if the underlying columns in SQL Server use a case-sensitive `collation
+<https://learn.microsoft.com/en-us/sql/relational-databases/collations/collation-and-unicode-support?view=sql-server-ver16>`_.
+
+The following operators are pushed down:
+
+- ``=``
+- ``<>``
+- ``IN``
+- ``NOT IN``
+
+To ensure correct results, operators are not pushed down for columns using a
+case-insensitive collation.
 
 .. _sqlserver-bulk-insert: