Derby
  1. Derby
  2. DERBY-1703

The documentation for (or implementation of) SUBSTR(string,start,length) is wrong

    Details

    • Type: Bug Bug
    • Status: Open
    • Priority: Minor Minor
    • Resolution: Unresolved
    • Affects Version/s: 10.1.3.1
    • Fix Version/s: None
    • Component/s: Documentation
    • Urgency:
      Normal

      Description

      The latest alpha manuals say:
      "If startPosition is positive, it refers to position from the start of the source expression (counting the first character as 1). If startPosition is
      negative, it is the position from the end of the source."

      But when I try to use substr with a negative starting position, I get:

      $ java org.apache.derby.tools.ij repro.sql
      ij version 10.2
      ij> connect 'jdbc:derby:/home/dt136804/repro;create=true;territory=en_US';
      ij> create table t1(c1 varchar(128));
      0 rows inserted/updated/deleted
      ij> insert into t1 values ('The dog ate my homework');
      1 row inserted/updated/deleted
      ij> select substr(c1,-1,8) from t1;
      1
      --------
      ERROR 22011: The second or third argument of the SUBSTR function is out of range.

      and not 'homework' as I would expect.

      The SQL standard (2003) does not seem to say anything about negative starting positions...

        Activity

        Gavin made changes -
        Workflow jira [ 12381830 ] Default workflow, editable Closed status [ 12797958 ]
        Kathey Marsden made changes -
        Labels derby_triage10_5_2
        Andrew McIntyre made changes -
        Fix Version/s 10.3.0.0 [ 12310800 ]
        Dyre Tjeldvoll made changes -
        Field Original Value New Value
        Summary The documentation for (or implementation of) SUBSTR(s,len) is wrong The documentation for (or implementation of) SUBSTR(string,start,length) is wrong
        Dyre Tjeldvoll created issue -

          People

          • Assignee:
            Unassigned
            Reporter:
            Dyre Tjeldvoll
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            Dates

            • Created:
              Updated:

              Development