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>     The argument values supplied to a PL/Tcl function's code are simply
     the input arguments converted to text form (just as if they had been
     displayed by a <TT
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>SELECT</TT
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     <TT
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     command will accept any string that is acceptable input format for
     the function's declared return type.  So, within the PL/Tcl function,
     all values are just text strings.
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