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Version 0.4 beta  27/02/97
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Grab functionality added, to allow interrogation of Oracle's SQL cache
Bind variables used wherever possible to prevent unnecessary reparses of the
SQL generated by explain
Extra error checking
Various code cleanups & restructuring
More extensive commenting of the source

Version 0.3 beta  19/02/97
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Changed to use new Tk FileSelect instead of older FileDialog.
Added facility to supply user/pass@database & SQL filename on the command-line.
Thanks to Eric Zylberstejn <ezylbers@capgemini.fr> for the patch + suggestions.
Added check on login to Oracle for a PLAN_TABLE in the user's schema.

Version 0.2 beta  05/02/97
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Changed to work with both Oracle 7 and 8 statistics.
Pop-up table & index description dialogs added.
First public version.

Version 0.1 beta  27/01/98
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Initial version.
Not publically released.