Getting following error in using cursor to fetch the records from a large table in c language

Hi all,

Getting following error in using cursor to fetch the records from a large table in c language.

Can you please suggest why it is coming and what is the remedy for this.

Error Details

-----------------

Failed to execute the sql command close:

mycursor_4047439616_1571970686004430275FATAL: terminating connection due to conflict with recovery

DETAIL: User query might have needed to see row versions that must be removed.

HINT: In a moment you should be able to reconnect to the database and repeat your command.

Sample Code snippet used

theCursorDec = (RWCString)"DECLARE " + mySqlCursor + " CURSOR FOR " + theSql;

myFetchSql = "FETCH " + fetchStr + " IN " + mySqlCursor;

// Begin the cursor

PQexec(connection, ,"BEGIN"))

PQexec(connection, ,"myFetchSql")

// Fetch records from the cursor. Getting First N tuples

mySqlResultsPG = PQexec(connection,myFetchSql);

if(PQresultStatus(mySqlResultsPG) == PGRES_TUPLES_OK)

{

myNumColumns = PQnfields(mySqlResultsPG);

ntuples = PQntuples(mySqlResultsPG);

myTotalNumberOfRowsInQueryResult = ntuples;

myCurrentRowNum = 0 ;

}

Regards

Tarkeshwar