In oracle, comment is a keyword... it cannot be used in a schema definition as:

CREATE TABLE "_yoyo_log" ( id VARCHAR(36), migration_hash VARCHAR(64), migration_id VARCHAR(255), operation VARCHAR(10), username VARCHAR(255), hostname VARCHAR(255), comment VARCHAR(255), created_at_utc TIMESTAMP, PRIMARY KEY (id))

you need to add doublequotes in order to avoid this issue in internalmigrations/v2.py

def create_log_table(backend): backend.execute( "CREATE TABLE {0.log_table_quoted} ( " "id VARCHAR(36), " "migration_hash VARCHAR(64), " "migration_id VARCHAR(255), " "operation VARCHAR(10), " "username VARCHAR(255), " "hostname VARCHAR(255), " ""comment" VARCHAR(255), " "created_at_utc TIMESTAMP, " "PRIMARY KEY (id))".format(backend) )

But the comment column is really used? _yoyo_log seems to be used only in base.py and there the insert stament do not fullfill the "comment" column. Or I'm wrong?