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-rw-r--r--lib/sqlalchemy/sql/compiler.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py
index a41a149d1..f589e4e4e 100644
--- a/lib/sqlalchemy/sql/compiler.py
+++ b/lib/sqlalchemy/sql/compiler.py
@@ -982,7 +982,9 @@ class DDLCompiler(engine.Compiled):
# On some DB order is significant: visit PK first, then the
# other constraints (engine.ReflectionTest.testbasic failed on FB2)
if table.primary_key:
- text += ", \n\t" + self.process(table.primary_key)
+ pk = self.process(table.primary_key)
+ if pk:
+ text += ", \n\t" + pk
const = ", \n\t".join(p for p in
(self.process(constraint) for constraint in table.constraints