code: def upgrade():
      op.add_column(
          "dbs",
          sa.Column(
              "allow_csv_upload",
              sa.Boolean(),
              nullable=False,
              server_default=expression.true(),
          ),
      )
  
imports: import sqlalchemy
  from alembic import op
  from sqlalchemy.sql import expression
label_desc: Use image node_id 1 for calling a global function with example usage: upgrade() without return types