(psycopg2.OperationalError) Invalid - opcode










3















I am trying to connect to Netezza using SQLalchemy.create_engine(). The reason I want to use SQLAlchmey is because I want to be able to read and write through pandas dataframe.



What works is as follow:



import pandas as pd
import pyodbc
conn = pyodbc.connect('DSN=NZDWW')
df2 = pd.read_sql(Query,conn)


Above code runs fine. But in order to write 'df2' dataframe to the Netezza, I need to use the function to_sql(), which needs SQLAlchemy. This is what my Code looks like:



from sqlalchemy import create_engine
username = os.getenv('REDSHIFT_USER')
password = os.getenv('REDSHIFT_PASS')
DATABASE = "SHP_TARGET"
HOST = "Netezza1"
PORT = 5480
conn_str = "postgresql://"+username+":"+password+"@"+HOST+':'+str(PORT)+'/'+DATABASE
engine3 = create_engine(conn_str)
df = pd.read_sql(Query, engine3)


When I execute this, I get the following error:
OperationalError: (psycopg2.OperationalError) Invalid - opcode
Invalid - opcodeInvalid packet length (Background on this error at: http://sqlalche.me/e/e3q8)



Any leads will be much appreciated. thanks.



Database: Netezza
Python version: 3.6
OS: Windows










share|improve this question


























    3















    I am trying to connect to Netezza using SQLalchemy.create_engine(). The reason I want to use SQLAlchmey is because I want to be able to read and write through pandas dataframe.



    What works is as follow:



    import pandas as pd
    import pyodbc
    conn = pyodbc.connect('DSN=NZDWW')
    df2 = pd.read_sql(Query,conn)


    Above code runs fine. But in order to write 'df2' dataframe to the Netezza, I need to use the function to_sql(), which needs SQLAlchemy. This is what my Code looks like:



    from sqlalchemy import create_engine
    username = os.getenv('REDSHIFT_USER')
    password = os.getenv('REDSHIFT_PASS')
    DATABASE = "SHP_TARGET"
    HOST = "Netezza1"
    PORT = 5480
    conn_str = "postgresql://"+username+":"+password+"@"+HOST+':'+str(PORT)+'/'+DATABASE
    engine3 = create_engine(conn_str)
    df = pd.read_sql(Query, engine3)


    When I execute this, I get the following error:
    OperationalError: (psycopg2.OperationalError) Invalid - opcode
    Invalid - opcodeInvalid packet length (Background on this error at: http://sqlalche.me/e/e3q8)



    Any leads will be much appreciated. thanks.



    Database: Netezza
    Python version: 3.6
    OS: Windows










    share|improve this question
























      3












      3








      3








      I am trying to connect to Netezza using SQLalchemy.create_engine(). The reason I want to use SQLAlchmey is because I want to be able to read and write through pandas dataframe.



      What works is as follow:



      import pandas as pd
      import pyodbc
      conn = pyodbc.connect('DSN=NZDWW')
      df2 = pd.read_sql(Query,conn)


      Above code runs fine. But in order to write 'df2' dataframe to the Netezza, I need to use the function to_sql(), which needs SQLAlchemy. This is what my Code looks like:



      from sqlalchemy import create_engine
      username = os.getenv('REDSHIFT_USER')
      password = os.getenv('REDSHIFT_PASS')
      DATABASE = "SHP_TARGET"
      HOST = "Netezza1"
      PORT = 5480
      conn_str = "postgresql://"+username+":"+password+"@"+HOST+':'+str(PORT)+'/'+DATABASE
      engine3 = create_engine(conn_str)
      df = pd.read_sql(Query, engine3)


      When I execute this, I get the following error:
      OperationalError: (psycopg2.OperationalError) Invalid - opcode
      Invalid - opcodeInvalid packet length (Background on this error at: http://sqlalche.me/e/e3q8)



      Any leads will be much appreciated. thanks.



      Database: Netezza
      Python version: 3.6
      OS: Windows










      share|improve this question














      I am trying to connect to Netezza using SQLalchemy.create_engine(). The reason I want to use SQLAlchmey is because I want to be able to read and write through pandas dataframe.



      What works is as follow:



      import pandas as pd
      import pyodbc
      conn = pyodbc.connect('DSN=NZDWW')
      df2 = pd.read_sql(Query,conn)


      Above code runs fine. But in order to write 'df2' dataframe to the Netezza, I need to use the function to_sql(), which needs SQLAlchemy. This is what my Code looks like:



      from sqlalchemy import create_engine
      username = os.getenv('REDSHIFT_USER')
      password = os.getenv('REDSHIFT_PASS')
      DATABASE = "SHP_TARGET"
      HOST = "Netezza1"
      PORT = 5480
      conn_str = "postgresql://"+username+":"+password+"@"+HOST+':'+str(PORT)+'/'+DATABASE
      engine3 = create_engine(conn_str)
      df = pd.read_sql(Query, engine3)


      When I execute this, I get the following error:
      OperationalError: (psycopg2.OperationalError) Invalid - opcode
      Invalid - opcodeInvalid packet length (Background on this error at: http://sqlalche.me/e/e3q8)



      Any leads will be much appreciated. thanks.



      Database: Netezza
      Python version: 3.6
      OS: Windows







      python python-3.x postgresql psycopg2 netezza






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jul 27 '18 at 19:53









      Abhi GargAbhi Garg

      284




      284






















          1 Answer
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          The sqlalchemy dialect for Postges isn't compatible with Netezza.



          The error you're receiving is the psycopg2 module, which facilitates the connection, complaining that it can't make sense of what the server is "saying", basically.



          There appears to be a dialect for Netezza though. You may want to try that out.






          share|improve this answer






















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            1 Answer
            1






            active

            oldest

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            active

            oldest

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            active

            oldest

            votes









            0














            The sqlalchemy dialect for Postges isn't compatible with Netezza.



            The error you're receiving is the psycopg2 module, which facilitates the connection, complaining that it can't make sense of what the server is "saying", basically.



            There appears to be a dialect for Netezza though. You may want to try that out.






            share|improve this answer



























              0














              The sqlalchemy dialect for Postges isn't compatible with Netezza.



              The error you're receiving is the psycopg2 module, which facilitates the connection, complaining that it can't make sense of what the server is "saying", basically.



              There appears to be a dialect for Netezza though. You may want to try that out.






              share|improve this answer

























                0












                0








                0







                The sqlalchemy dialect for Postges isn't compatible with Netezza.



                The error you're receiving is the psycopg2 module, which facilitates the connection, complaining that it can't make sense of what the server is "saying", basically.



                There appears to be a dialect for Netezza though. You may want to try that out.






                share|improve this answer













                The sqlalchemy dialect for Postges isn't compatible with Netezza.



                The error you're receiving is the psycopg2 module, which facilitates the connection, complaining that it can't make sense of what the server is "saying", basically.



                There appears to be a dialect for Netezza though. You may want to try that out.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 14 '18 at 3:06









                joebjoeb

                2,18611519




                2,18611519



























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