[jira] [Created] (IGNITE-11515) MVCC: Make sure that multiple cursors are handled properly for JDBC/ODBC

["Vladimir Ozerov (JIRA)" <ji...@apache.org>]

Vladimir Ozerov created IGNITE-11515:
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             Summary: MVCC: Make sure that multiple cursors are handled properly for JDBC/ODBC
                 Key: IGNITE-11515
                 URL: https://issues.apache.org/jira/browse/IGNITE-11515
             Project: Ignite
          Issue Type: Bug
          Components: jdbc, mvcc, odbc
            Reporter: Vladimir Ozerov


Consider the following scenario executed from JDBC/ODBC driver:
1) Open transaction
2) Get a cursor for some large SELECT
3) Close transaction
4) Overwrite some of not-yet-returned values for the cursor
5) Force vacuum
6) Read remaining values from the cursor

Will we get correct result? Most probably no, because we close transaction on commit without consulting to any opened cursors. 

Possible solutions:
1) Extend transaction lifetime until all cursors are closed
2) Or close the cursors forcibly and throw proper error message



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