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  1. MariaDB Connector/J
  2. CONJ-497

Long escapable string does not work

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 2.0.0-RC, 1.6.0, 2.0.1, 1.6.1, 2.0.2
    • Fix Version/s: 2.0.3, 1.6.2
    • Component/s: Other
    • Labels:
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      Description

      As I can't copy-paste code here as our application uses Connector/J inside a complicated self-written framework, I'll describe the reproduction steps:

      • Create a table someTable with a field foo type longtext
      • Use a prepared statement with a simple query like INSERT INTO someTable (foo) VALUES ( ? )
      • Generate random strings with below code:

        private String createString(int length) {
          return StringUtils.leftPad("", length, "\"");
        }
        

      • Use this to generate strings length 8000000 (8 million) doublequotes and 10000000 (10 million) doublequotes
      • Check the results (SELECT LENGTH(foo) FROM someTable)

      You'll see (or at least I see) that 8000000 inserts a string length 8000000 (how it should be), but the 10000000 inserts a string half its length: 5000000.

      I think I also found the problem and the solution, so I will add a pull request.

      In our case (where we insert very large JSON strings with a lot of doublequotes) this makes us lose data and generate invalid JSON strings. This does not happen in 1.5.9, but does happen in 1.6.x and 2.0.x as far as I have tested.

      This is a critical bug as this results in invalid and lost data.

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            Assignee:
            diego dupin Diego Dupin
            Reporter:
            bartlaarhoven Bart Laarhoven
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              Updated:
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