text: # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  #   http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
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  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
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  # under the License.
  """add_on_saved_query_delete_tab_state_null_constraint"
  
  Revision ID: 58df9d617f14
  Revises: 6766938c6065
  Create Date: 2022-03-16 23:24:40.278937
  
  """
  
  # revision identifiers, used by Alembic.
  revision = "58df9d617f14"
  down_revision = "6766938c6065"
  
  import sqlalchemy as sa
  from alembic import op
  
  from superset.utils.core import generic_find_fk_constraint_name
  
  
  def upgrade():
      bind = op.get_bind()
      insp = sa.engine.reflection.Inspector.from_engine(bind)
  
      with op.batch_alter_table("tab_state") as batch_op:
          batch_op.drop_constraint(
              generic_find_fk_constraint_name("tab_state", {"id"}, "saved_query", insp),
              type_="foreignkey",
          )
  
          batch_op.create_foreign_key(
              "saved_query_id",
              "saved_query",
              ["saved_query_id"],
              ["id"],
              ondelete="SET NULL",
          )
  
  
  def downgrade():
      bind = op.get_bind()
      insp = sa.engine.reflection.Inspector.from_engine(bind)
  
      with op.batch_alter_table("tab_state") as batch_op:
          batch_op.drop_constraint(
              generic_find_fk_constraint_name("tab_state", {"id"}, "saved_query", insp),
              type_="foreignkey",
          )
  
          batch_op.create_foreign_key(
              "saved_query_id",
              "saved_query",
              ["saved_query_id"],
              ["id"],
          )
  