'''array unset''' ''arrayName ?pattern?''

Unsets all of the elements in the array that match ''pattern'' (using the matching rules of '''[string match]'''). If ''arrayName'' isn't the name of an array variable or there are no matching elements in the array, no error will be raised. If ''pattern'' is omitted and ''arrayName'' is an array variable, then the command unsets the entire array. The command always returns an empty string.

Note that this is only available from Tcl v8.3 onwards; see [Arrays / Hash Maps] for methods of clearing arrays in earlier versions of Tcl.
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[Bezoar]

Because it is prevalent in the sqlite api for tcl it may become necessary to unset an array index that is literally "*". Use normal [glob] escaping, such as one of these forms: 
 
======
array unset  x \[*\]
array unset  x {[*]}
array unset  x \\*
array unset  x {\*}
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See also:

   * [array]
   * [array names]
   * [unset]

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