From 6cd195c4a1589620784b052a041e691427d1e086 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Thu, 25 Feb 2021 16:18:12 -0500
Subject: implement visit_unsupported_compilation for TypeCompiler

Fixed regression where the "unsupported compilation error" for unknown
datatypes would fail to raise correctly.

Fixes: #5979
Change-Id: I984fe95666813832ab5bdfc568322e2aa7cc3db0
---
 lib/sqlalchemy/sql/compiler.py | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'lib/sqlalchemy/sql')

diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py
index 763b4cabb..c4577e397 100644
--- a/lib/sqlalchemy/sql/compiler.py
+++ b/lib/sqlalchemy/sql/compiler.py
@@ -550,6 +550,12 @@ class TypeCompiler(util.with_metaclass(util.EnsureKWArgType, object)):
     def process(self, type_, **kw):
         return type_._compiler_dispatch(self, **kw)
 
+    def visit_unsupported_compilation(self, element, err, **kw):
+        util.raise_(
+            exc.UnsupportedCompilationError(self, element),
+            replace_context=err,
+        )
+
 
 # this was a Visitable, but to allow accurate detection of
 # column elements this is actually a column element
-- 
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