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"""
Add partition_key to backfill_dag_run.

Revision ID: 134de42d3cb0
Revises: e42d9fcd10d9
Create Date: 2026-02-04 11:42:08.773068

"""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op

from airflow.migrations.db_types import StringID
from airflow.migrations.utils import disable_sqlite_fkeys
from airflow.utils.sqlalchemy import UtcDateTime

revision = "134de42d3cb0"
down_revision = "e42d9fcd10d9"
branch_labels = None
depends_on = None
airflow_version = "3.2.0"


def upgrade():
    """Apply Add partition_key to backfill_dag_run."""
    with disable_sqlite_fkeys(op):
        op.add_column("dag_run", sa.Column("created_at", UtcDateTime(timezone=True), nullable=True))
        with op.batch_alter_table("backfill_dag_run", schema=None) as batch_op:
            batch_op.add_column(sa.Column("partition_key", StringID(), nullable=True))
            batch_op.alter_column("logical_date", existing_type=sa.TIMESTAMP(), nullable=True)


def downgrade():
    """Unapply Add partition_key to backfill_dag_run."""
    with disable_sqlite_fkeys(op):
        op.execute("DELETE FROM backfill_dag_run WHERE logical_date IS NULL;")
        with op.batch_alter_table("backfill_dag_run", schema=None) as batch_op:
            batch_op.alter_column("logical_date", existing_type=sa.TIMESTAMP(), nullable=False)
            batch_op.drop_column("partition_key")
    with op.batch_alter_table("dag_run", schema=None) as batch_op:
        batch_op.drop_column("created_at")
