cx_Oracle.DatabaseError: ORA-12514

Posted 2021-10-05 Data+Science+Insight

cx_Oracle.DatabaseError: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
 

目录

cx_Oracle.DatabaseError: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor

问题：

解决：

完整错误：

---

问题：

填写了错误的database名称；

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, DateTime, Boolean,Float


class OracleDB(object):
    Base = declarative_base()
    def __init__(self,user='xxx',password='xxx',dabatase='xxx',serverip='10.10.10.10',port='1000'):
        user = user #'root'  
        password = password 
        database = dabatase  
        serverip = serverip 
        dns = cx_Oracle.makedsn(serverip, port, service_name=dabatase)
        self.engine = create_engine("oracle://"+user+":"+password+"@" + dns, encoding='utf-8', echo=True)
        # Session = sessionmaker(bind=self.engine)
        # self.session = Session()
    def getEngine(self):
        return self.engine

解决：

填写正确的database名称；

data=
        (DESCRIPTION=
            (ADDRESS_LIST=
                (ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521))
            )
            (CONNECT_DATA=
                (SERVICE_NAME=machine_learning_database)
            )
        )

完整错误：

cx_Oracle.DatabaseError: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor

cx_Oracle.DatabaseError: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor

参考：ORA-12514: TNS:listener does not currently know of service requested in connect descriptor 

参考：cx_Oracle.DatabaseError: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor