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Remove factorial operators, leaving only the factorial() function.

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The "!" operator is our only built-in postfix operator.  Remove it,
on the way to removal of grammar support for postfix operators.

There is also a "!!" prefix operator, but since it's been marked
deprecated for most of its existence, we might as well remove it too.

Also zap the SQL alias function numeric_fac(), which seems to have
equally little reason to live.

Mark Dilger, based on work by myself and Robert Haas;
review by John Naylor

Discussion: https://postgr.es/m/38ca86db-42ab-9b48-2902-337a0d6b8311@2ndquadrant.com
This commit is contained in:
Tom Lane
2020-09-17 16:17:27 -04:00
parent 74d4608f50
commit 76f412ab31
10 changed files with 33 additions and 93 deletions
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8
src/test/regress/sql/numeric.sql
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@ -1300,12 +1300,10 @@ SELECT lcm(9999 * (10::numeric)^131068 + (10::numeric^131068 - 1), 2); -- overfl
--
-- Tests for factorial
--
SELECT 4!;
SELECT !!3;
SELECT factorial(4);
SELECT factorial(15);
SELECT 100000!;
SELECT 0!;
SELECT -4!;
SELECT factorial(100000);
SELECT factorial(0);
SELECT factorial(-4);
--