python如何遍历postgresql所有的用户表

SELECT table_name
FROM information_schema.tables
WHERE table_schema = 'public'  -- 只查询 public 模式，可修改为其他模式
  AND table_type = 'BASE TABLE';  -- 只查询用户表，排除视图等

SELECT relname AS table_name
FROM pg_class
JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
WHERE pg_namespace.nspname = 'public'  -- 模式名
  AND pg_class.relkind = 'r';  -- 'r' 表示普通表

import psycopg2

def get_all_tables(database, user, password, host="localhost", port="5432"):
    try:
        # 连接到 PostgreSQL 数据库
        connection = psycopg2.connect(
            database=database,
            user=user,
            password=password,
            host=host,
            port=port
        )
        cursor = connection.cursor()
        
        # 查询所有用户表
        query = """
            SELECT table_name
            FROM information_schema.tables
            WHERE table_schema = 'public'
              AND table_type = 'BASE TABLE';
        """
        cursor.execute(query)
        
        # 获取所有表名
        tables = [row[0] for row in cursor.fetchall()]
        return tables
        
    except (Exception, psycopg2.Error) as error:
        print("Error while connecting to PostgreSQL", error)
    finally:
        # 关闭数据库连接
        if connection:
            cursor.close()
            connection.close()

# 使用示例
if __name__ == "__main__":
    tables = get_all_tables(
        database="your_database",
        user="your_username",
        password="your_password"
    )
    print("所有用户表:", tables)