Robot Framework：如何连接Oracle数据库

Question

We are trying our luck with robot framework for tests. Automation. I am stuck at database connection at this point.

A DB connection using cx_Oracle is displaying an error saying “ No keyword withy the name cx_Oracle'. If you have any idea please help. It will be helpful if you could put out an example of the Oracle dB connection sample.

Answer 1

Check DatabaseLibrary available with RobotFramework.

Check Here for more info !!!

DatabaseLibrary Keyword Documentation

It has two keywords for Database Connection:

1. Connect To Database
2. Connect To Database Using Custom Params

Answer 2

I had the same issue and This is the solution which I found

Step 1: Install Oracle instant client (32 bit) ( I'm using instantclient_18_3, You don't have to install cx_oracle seperately )

Step 2: Install Operating System Literary and the Database Library for Robot and import it

*** Settings ***
Library           DatabaseLibrary
Library           OperatingSystem

Then in your robot script, Add The following variable and make sure it's with the test cases (NOT in an external resource file)

*** Variables ***
${DB_CONNECT_STRING}    'DB_USERNAME/DB_PASSWORD@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=YOUR_DB_OR_HOST)(PORT=YOUR_PORT))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=YOUR_SID)))'

Then you can use the following keywords to set the environment variables and to run queries

*** Keywords ***
Connect To DB
    [Arguments]    ${DB_CONNECT_STRING_VALUE}
    Set Environment Variable    PATH    PATH_TO_YOUR_INSTANT_CLIENT\\instantclient_18_3
    Set Global Variable    ${DB_CONNECT_STRING_VALUE}
    #Connect to DB
    connect to database using custom params    cx_Oracle    ${DB_CONNECT_STRING_VALUE}

Run Query and log results
    [Arguments]    ${QUERY_TO_EXECUTE}
    Set Global Variable    ${QUERY_TO_EXECUTE}
    ${queryResults}    Query    ${QUERY_TO_EXECUTE}
    log to console    ${queryResults}

Disconnect From DB
    #Disconnect from DB
    disconnect from database

Finally, in your test case run it like this

*** Test Cases ***
Test Connetion
    [Tags]    DBConnect
    Connect To DB    ${DB_CONNECT_STRING}
    Run Query and log results    SELECT sysdate from Dual

This should work fine for you

Answer 3

"No keyword withy the name cx_Oracle" means that you are using 'cx_Oracle' as keyword. I do not see given library in commonly used Robot Extended libraries . If the case is that you installed the library wrongly and imported it correctly into Robot script as:

*** Settings ***
Library   MyLibraryName

then I would expect it to fail on the import.

I agree with Dinesh. Try to use the Database Library first.

Or if you cannot use Database Library (the Connect To Database Using Custom Params has limitations), it is possible to write your own Robot Library that would reuse the cx_Oracle python library and expose keywords to robot. It is generally not that complicated and I did that with pyodbc.

Answer 4

It was indeed an installation issue. We had to use Anaconda3 and had to installed the library under its site-packages. I had this one under default Python folder.The issue is now resolved.

Answer 5

You can use robotframework-oracledb-library

• Install OracleDBLibrary module

  pip install robotframework-oracledb-library

• After the installation, you can import OracleDBLibrary and connect to Oracle Database as follows

  *** Settings *** Library OracleDBLibrary *** Variables *** ${HOST} localhost ${PORT} 1521 ${SID} ORCLCDB ${USER} SYS ${PASSWORD} Oradoc_db1 ${MODE} SYSDBA *** Test Cases *** CONNECT TO ORACLE DATABASE WITH SID SUCCESSFULLY ${DSN} = ORACLE MAKEDSN host=${HOST} port=${PORT} sid=${SID} ORACLE CONNECT user=${USER}... password=${PASSWORD}... dsn=${DSN}... mode=${MODE} ${CONNECTION STATUS} = ORACLE CONNECTION PING SHOULD BE EQUAL ${CONNECTION STATUS} ${NONE} ORACLE CONNECTION CLOSE

For more information, you can check robotframework-oracledb-library-test