"""add data source db_database and db_schema columns

Revision ID: g7h8i9j0k1l2
Revises: f6g7h8i9j0k1
Create Date: 2026-06-04 14:00:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = 'g7h8i9j0k1l2'
down_revision: Union[str, None] = 'f6g7h8i9j0k1'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        'core_data_source',
        sa.Column('db_database', sa.String(length=100), nullable=True, server_default='', comment='SQL执行目标库/catalog'),
    )
    op.add_column(
        'core_data_source',
        sa.Column('db_schema', sa.String(length=100), nullable=True, server_default='', comment='SQL执行目标模式/schema'),
    )
    op.execute("UPDATE core_data_source SET db_database = '' WHERE db_database IS NULL")
    op.execute("UPDATE core_data_source SET db_schema = '' WHERE db_schema IS NULL")


def downgrade() -> None:
    op.drop_column('core_data_source', 'db_schema')
    op.drop_column('core_data_source', 'db_database')