Right now to get user types the method in question gets global proxy
instance to get database from it and then peek a keyspace, its metadata
and, finally, the user types. There's also a safety check for proxy not
being initialized, which happens in tests.
Instead of messing with the proxy, the parse() method now accepts the
user_types_storage reference from which it gets the types. All the
callers already have the needed storage at hand -- in most of the cases
it's one shared between the database and schema_ctxt. In case of tests
is's a dummy storage, in case of schema-loader it's its local one.
The get_column_mapping() is special -- it doesn't expect any user-types
to be parsed and passes "" keyspace into it, neither it has db/ctxt to
get types storage from, so it can safely use the dummy one.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
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