Merging upstream version 12.2.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

sqlglot/__init__.py

@@ -50,7 +50,7 @@ if t.TYPE_CHECKING:
     T = t.TypeVar("T", bound=Expression)
 
 
-__version__ = "11.7.1"
+__version__ = "12.2.0"
 
 pretty = False
 """Whether to format generated SQL by default."""
@@ -181,7 +181,7 @@ def transpile(
     Returns:
         The list of transpiled SQL statements.
     """
-    write = write or read if identity else write
+    write = (read if write is None else write) if identity else write
     return [
         Dialect.get_or_raise(write)().generate(expression, **opts)
         for expression in parse(sql, read, error_level=error_level)