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"""Add index on state, dag_id for queued ``dagrun``

Revision ID: ccde3e26fe78
Revises: 092435bf5d12
Create Date: 2021-09-08 16:35:34.867711

"""

from alembic import op
from sqlalchemy import text

# revision identifiers, used by Alembic.
revision = 'ccde3e26fe78'
down_revision = '092435bf5d12'
branch_labels = None
depends_on = None
airflow_version = '2.1.4'


def upgrade():
    """Apply Add index on state, dag_id for queued ``dagrun``"""
    with op.batch_alter_table('dag_run') as batch_op:
        batch_op.create_index(
            'idx_dag_run_queued_dags',
            ["state", "dag_id"],
            postgresql_where=text("state='queued'"),
            mssql_where=text("state='queued'"),
            sqlite_where=text("state='queued'"),
        )


def downgrade():
    """Unapply Add index on state, dag_id for queued ``dagrun``"""
    with op.batch_alter_table('dag_run') as batch_op:
        batch_op.drop_index('idx_dag_run_queued_dags')
