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sqlalchemy分表测试代码
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| #-!-coding:utf-8-!- | |
| # schema | |
| # revision identifiers, used by Alembic. | |
| revision = '507c3af35680' | |
| down_revision = None | |
| from alembic import op | |
| import sqlalchemy as sa | |
| def upgrade(): | |
| for table_id in range(0, 128): | |
| op.create_table( | |
| 'test_%03d' % table_id, | |
| sa.Column('key_sign', sa.Integer, primary_key=True, autoincrement=False), | |
| sa.Column('db_id', sa.SmallInteger, nullable=False), | |
| ) | |
| def downgrade(): | |
| for table_id in range(0, 128): | |
| op.drop_table('test_%03d' % table_id) | |
| # 测试代码 | |
| import random | |
| from sqlalchemy import create_engine | |
| from sqlalchemy.ext.declarative import declarative_base | |
| engine = create_engine('sqlite:///test.sqlite', pool_recycle=3600, strategy='threadlocal') | |
| Base = declarative_base() | |
| Base.metadata.bind = engine | |
| Base.metadata.reflect(engine) | |
| def table_name(key_sign): | |
| table_id = key_sign % 128 | |
| return 'test_%03d' % table_id | |
| conn = engine.connect() | |
| for i in range(100000): | |
| key_sign = random.randint(0, 0x7fffffffffffffff) | |
| ins = Base.metadata.tables[table_name(key_sign)].insert().values( | |
| key_sign=key_sign, | |
| db_id=random.randint(0,255) | |
| ) | |
| result = conn.execute(ins) | |
| print result.inserted_primary_key | |
| result.close() |
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