"""add_atmo_company_table

Revision ID: 3c8a8862c800
Revises: 981f62cc2cdb
Create Date: 2025-07-12 01:28:26.221250

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '3c8a8862c800'
down_revision = '981f62cc2cdb'
branch_labels = None
depends_on = None


def upgrade():
    """升级数据库到当前版本"""
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('atmo_company',
    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False, comment='污染源序号'),
    sa.Column('longitude', sa.Float(), nullable=True, comment='经度坐标（精确到小数点后六位）'),
    sa.Column('latitude', sa.Float(), nullable=True, comment='纬度坐标（精确到小数点后六位）'),
    sa.Column('company_name', sa.String(length=100), nullable=True, comment='企业名称'),
    sa.Column('company_type', sa.String(length=50), nullable=True, comment='企业类型'),
    sa.Column('county', sa.String(length=50), nullable=True, comment='所属区县'),
    sa.Column('particulate_emission', sa.Float(), nullable=True, comment='大气颗粒物排放量（吨/年）'),
    sa.PrimaryKeyConstraint('id')
    )
    # ### end Alembic commands ###


def downgrade():
    """将数据库降级到上一版本"""
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_table('atmo_company')
    # ### end Alembic commands ###