simple_conn_pool = psycopg2.pool.SimpleConnectionPool(2, 10, user="postgres", password="***", host="127.0.0.1", port="5432", database="postgres") 2. 成功连接后,我们会从连接池中获取一个可用的连接。 # getconn() is used to get available connection from connection pool ps_connection ...
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代码语言:txt 复制 import psycopg2 try: conn = psycopg2.connect( host="localhost", port="5432", database="your_database", user="your_username", password="your_password" ) # 连接成功,进行其他操作... except psycopg2.Error as e: print(f"Unable to connect to PostgreSQL: {e}") 在上述代码...
conn=psycopg2.connect(database=db,**conf["postgres"]) cur=conn.cursor() cur.copy_from(output,table,null='') conn.commit() result=cur.rowcount finally: cur.close() conn.close() return result if __name__=='__main__': # df=pd.read_csv('e:/730_price.csv') print(df_to_pg(tabl...
conn = psycopg2.connect(database="testdb", user="postgres", password="password", host="127.0.0.1", port="5432") 创建游标对象 cur = conn.cursor() 执行SQL语句 cur.execute("SELECT * FROM table_name") 获取查询结果的元组列表 rows = cur.fetchall() ...
class PostgresDatabase:def __init__(self, host, database, user, password,port=5432):self.host = host self.database = database self.user = user self.password = password self.port = port self.conn = None self.cursor = None # 在初始化方法中建立数据库连接 self.connect() def connect(...
conn=psycopg2.connect(dbname="test",user="postgres",password="secret",host="127.0.0.1",port="5432") Parameter Table 1 psycopg2.connect parameters Keyword Description dbname Database name user Username password Password host IP address of the database. The default type is UNIX socket. port Con...
ConnectionFailure: pooler: failed to create 1 connections, Error Message: remote node dn_6003_6004, detail: could not connect to server: Operation now in progress 报错原因: psycopg2在发送SQL语句前先发送了BEGIN语句开启事务。 CN Retry不支持事务块中的语句是特性约束。 解决方案: 在同步方式连接时,...
DB_NAME="""CREATEDATABASEifnotexists{};ALTERDATABASE{} OWNERTOpostgres; """.format(DATABASE_NAME, DATABASE_NAME) 发现会报一个DDL 语句语法错误 psycopg2.ProgrammingError: syntax error at or near"not"LINE2: CREATE DATABASEifnot exists test_classs; ...
conn = psycopg2.connect(database="postgres", user="omm2", password="P@ssw0rd123", host="192.168.52.3", port="26000") cur = conn.cursor() #创建表COMPANY1 cur.execute('''CREATE TABLE COMPANY1 (ID INT PRIMARY KEY NOT NULL, NAME TEXT NOT NULL, ...