November 2011 - postmodern-devel - mailman3.common-lisp.net

[postmodern-devel] Patch: Make :|| (symbol with an empty name) equivalent to :\|\|
by Stas Boukarev 21 Nov '11

21 Nov '11

:|| is a valid symbol in CL, its name is an empty string, "", and it would be much more pleasant to use it for concatenation instead of :\|\|. The attached patch adds :|| operator. -- With best regards, Stas.

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[postmodern-devel] <> operator
by Zach Beane 18 Nov '11

18 Nov '11

Out of SQL habit I used <> for inequality yesterday and got this error: function __(integer, integer) does not exist Should I just stick with !=? Zach

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[postmodern-devel] cl-postgres fails to read an empty array
by Andy Chambers 03 Nov '11

03 Nov '11

Hi, I'm not sure if this is the case in the latest version of postgresql but in my version, it fails to read an empty integer correctly from the DB. The following patch fixes for me... diff --git Postmodern/cl-postgres/interpret.lisp Postmodern/cl-postgres/\ interpret.lisp index 7d30f75..a6ce46f 100644 --- Postmodern/cl-postgres/interpret.lisp +++ Postmodern/cl-postgres/interpret.lisp @@ -196,8 +196,13 @@ used. Correct for sign bit when using integer format." (unless (< (incf pos) (length value)) (return ws))) 'simple-vector))))) +(defun maybe-parse-integer (s) + (if (string= "" s) + :null + (parse-integer s))) + ;; Integral array types -(let ((read-integral (read-array-value #'parse-integer))) +(let ((read-integral (read-array-value #'maybe-parse-integer))) (dolist (oid '(1561 1005 1007 1016 1028)) (set-sql-reader oid read-integral))) Cheers, Andy

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