import sqlalchemy as sa
from alembic import op

revision = '007'
down_revision = '006'
branch_labels = None
depends_on = None

def upgrade():
    op.add_column('tax_documents', sa.Column('interpretation_form', sa.String(20), nullable=True), schema='data_center')
    op.create_index('idx_doc_interp_form', 'tax_documents', ['interpretation_form'], schema='data_center')

def downgrade():
    op.drop_index('idx_doc_interp_form', table_name='tax_documents', schema='data_center')
    op.drop_column('tax_documents', 'interpretation_form', schema='data_center')