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From robertamarton <...@git.apache.org>
Subject [GitHub] incubator-trafodion pull request #523: TRAFODION [2025] Initialize authoriza...
Date Mon, 06 Jun 2016 17:44:11 GMT
Github user robertamarton commented on a diff in the pull request:

    https://github.com/apache/incubator-trafodion/pull/523#discussion_r65934536
  
    --- Diff: core/sql/cli/Context.cpp ---
    @@ -3850,6 +3856,48 @@ void ContextCli::createMxcmpSession()
       mxcmpSessionInUse_ = TRUE;
     }
     
    +// ----------------------------------------------------------------------------
    +// Method:  updateMxcmpSession
    +//
    +// Updates security attributes in child arkcmp
    +//
    +// Returns: 0 = succeeded; -1 = failed
    +// ----------------------------------------------------------------------------
    +Int32 ContextCli::updateMxcmpSession()
    +{
    +  // If no child arkcmp, just return
    +  if (getArkcmp()->getServer() == NULL)
    +    return 0;
    +
    +  // Send changed user information to arkcmp process
    +  CmpContext *cmpCntxt = CmpCommon::context();
    +  ex_assert(cmpCntxt, "No compiler context exists");
    +  NABoolean authOn = cmpCntxt->isAuthorizationEnabled();
    +
    +  // The message contains the following:
    +  //   (auth state and user ID are delimited by commas)
    +  //     authorization state (0 - off, 1 - on)
    +  //     integer user ID
    +  //     database user name
    +  // See CmpStatement::process (CmpMessageDatabaseUser) for more details
    +  Int32 userAsInt = (Int32) databaseUserID_;
    +  char userMessage [MAX_AUTHID_AS_STRING_LEN + 1 + MAX_USERNAME_LEN + 1 + 2];
    +  str_sprintf(userMessage, "%d,%d,%s", authOn, userAsInt, databaseUserName_);
    +  char *pMessage = (char *)&userMessage;
    +
    +  // Send message to child arkcmp, if one exists
    +  ExSqlComp::ReturnStatus cmpStatus;
    +  ExSqlComp *exSqlComp = getArkcmp();
    +  ex_assert(exSqlComp, "CliGlobals::getArkcmp() returned NULL");
    --- End diff --
    
    From what I read in the code, the ContextCli constructor allocates the arkcmpArray_ structure
and creates an ExSqlComp as the 0 entry.  Therefore, getArkcmp should not return null.  There
is code that kills all the arkcmp processes, but they are always restarted.  The way to tell
if a child arkcmp exists, is to look at the getServer() in the returned ExSqlCmp class.


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