Run bracket interpretation for reflection

Fixed bug where a schema name given with brackets, but no dots inside the
name, for parameters such as :paramref:`_schema.Table.schema` would not be
interpreted within the context of the SQL Server dialect's documented
behavior of interpreting explicit brackets as token delimiters, first added
in 1.2 for #2626, when referring to the schema name in reflection
operations. The original assumption for #2626's behavior was that the
special interpretation of brackets was only significant if dots were
present, however in practice, the brackets are not included as part of the
identifier name for all SQL rendering operations since these are not valid
characters within regular or delimited identifiers.  Pull request courtesy
Shan.

Fixes: #9133
Closes: #9134
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/9134
Pull-request-sha: 5dac87c82cd3063dd8e50f0075c7c00330be6439

Change-Id: I7a507bc38d75a04ffcb7e920298775baae22c6d1

1 files changed, 41 insertions, 0 deletions

diff --git a/test/dialect/mssql/test_compiler.py b/test/dialect/mssql/test_compiler.py
index 00bbc2af4..0076c76fd 100644
--- a/test/dialect/mssql/test_compiler.py
+++ b/test/dialect/mssql/test_compiler.py
@@ -599,6 +599,47 @@ class CompileTest(fixtures.TestBase, AssertsCompiledSQL):
             checkpositional=("bar",),
         )
 
+    @testing.variation("use_schema_translate", [True, False])
+    @testing.combinations(
+        "abc", "has spaces", "[abc]", "[has spaces]", argnames="schemaname"
+    )
+    def test_schema_single_token_bracketed(
+        self, use_schema_translate, schemaname
+    ):
+        """test for #9133.
+
+        this is not the actual regression case for #9133, which is instead
+        within the reflection process.  However, when we implemented
+        #2626, we never considered the case of ``[schema]`` without any
+        dots in it.
+
+        """
+
+        schema_no_brackets = schemaname.strip("[]")
+
+        if " " in schemaname:
+            rendered_schema = "[%s]" % (schema_no_brackets,)
+        else:
+            rendered_schema = schema_no_brackets
+
+        metadata = MetaData()
+        tbl = Table(
+            "test",
+            metadata,
+            Column("id", Integer, primary_key=True),
+            schema=schemaname if not use_schema_translate else None,
+        )
+
+        self.assert_compile(
+            select(tbl),
+            "SELECT %(name)s.test.id FROM %(name)s.test"
+            % {"name": rendered_schema},
+            schema_translate_map={None: schemaname}
+            if use_schema_translate
+            else None,
+            render_schema_translate=True if use_schema_translate else False,
+        )
+
     def test_schema_many_tokens_one(self):
         metadata = MetaData()
         tbl = Table(