remove NullType mapping to align with standard PostgreSQL dialect and avoid DDL compilation errors

Author: Eugene Shershen

psqlpy_sqlalchemy/__init__.py

@@ -2,5 +2,5 @@
 
 PsqlpyDialect = PSQLPyAsyncDialect
 
-__version__ = "0.1.0a6"
+__version__ = "0.1.0a7"
 __all__ = ["PsqlpyDialect", "PSQLPyAsyncDialect"]

psqlpy_sqlalchemy/dialect.py

@@ -264,7 +264,8 @@ class PSQLPyAsyncDialect(PGDialect):
             sqltypes.SmallInteger: _PGSmallInteger,
             sqltypes.BigInteger: _PGBigInteger,
             sqltypes.Boolean: _PGBoolean,
-            sqltypes.NullType: _PGNullType,
+            # Note: NullType mapping removed - standard PostgreSQL dialect doesn't map it
+            # and mapping it with render_bind_cast=True causes DDL compilation errors
         },
     )
 

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "psqlpy-sqlalchemy"
-version = "0.1.0a6"
+version = "0.1.0a7"
 description = "SQLAlchemy dialect for psqlpy PostgreSQL driver"
 readme = "README.md"
 license = {text = "MIT"}