TIP #423: FORMATTING TIMESTAMPS WITH MILLISECONDS 
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 Version:      $Revision: 1.1 $
 Author:       Thomas Perschak <tombert.group_at_live.at>
 State:        Draft
 Type:         Project
 Tcl-Version:  8.7
 Vote:         Pending
 Created:      Friday, 07 June 2013
 URL:          https://tip.tcl-lang.org423.html
 Post-History: 

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 ABSTRACT 
==========

 This TIP describes a change to *clock format* to allow it to handle 
 timestamps with sub-second accuracy. 

 RATIONALE 
===========

 Currently, the *clock format* accepts only integer numbers for clock 
 formatting. Since the *clock milliseconds* command was introduced in 
 Tcl 8.5, this limitation seems a bit restrictive. 

 In particular, the timestamp column in a number of databases (e.g., 
 <URL:http://www.postgresql.org/docs/9.1/static/datatype-datetime.html>) 
 handles high-resolution timestamps by allowing full ISO 8601 times, 
 which look like "04:05:06.789"; this would simplify database write 
 operations. 

 PROPOSAL 
==========

 The *clock format* command should accept floating point values for 
 timestamps. 

 Another format letter should be added to *clock format* which puts the 
 milliseconds into the output string; the millisecond value should not 
 be written unless explicitly requested. 

 COPYRIGHT 
===========

 This document has been placed in the public domain. 

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