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  1. WiredTiger
  2. WT-244

support primary key indices on column stores

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    Details

    • Type: Task
    • Status: Closed
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: WT1.3
    • Component/s: None
    • Labels:

      Description

      > WT_ASSERT(session, strcmp(cursor->key_format, "r") != 0);
      >
      > If a valid application can do this, should we change the ASSERT into an error message?

      A valid application can't hit this assert – key_format is determined when the index is created, this is just a sanity check when opening an index.

      However, the error here isn't what I would have expected:

      $ rm -rf WT_TEST && mkdir WT_TEST
      $ ./wt -h WT_TEST create -c 'key_format=r,columns=(k,v)' table:t
      $ ./wt -h WT_TEST create -c 'columns=(k)' index:t:k
      file:t_k.wti [session.create]: fixed-width field sizes must be greater than 0 and less than or equal to 8: Invalid argument

      The relevant part of the call stack is here:

      WT-5  0x000000010007250b in __create_file (session=0x1008009e0, uri=0x100103390 "file:t_k.wti", exclusive=0, config=0x100102be0 "columns=(k),value_format,key_format=r") at schema_create.c:77
      WT-6  0x0000000100073868 in __create_index (session=0x1008009e0, name=0x100102870 "index:t:k", exclusive=0, config=0x7fff5fbff9c7 "columns=(k)") at schema_create.c:282
      WT-7  0x000000010007401e in __wt_schema_create (session=0x1008009e0, name=0x100102870 "index:t:k", config=0x7fff5fbff9c7 "columns=(k)") at schema_create.c:397

      After the call to *wt_struct_reformat in *create_index, if the calculated key_format is "r", it should generate a sane error message there instead (i.e., "WiredTiger does not support primary key indices on column stores").

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              • Assignee:
                keith.bostic Keith Bostic
                Reporter:
                keith.bostic Keith Bostic
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                • Created:
                  Updated:
                  Resolved: