On Sat, Sep 23, 2023 at 12:54:01AM +0200, Vik Fearing wrote: > On 9/22/23 23:46, cary huang wrote: >> I think this feature can be a useful addition in dealing with time >> zones. I have applied and tried out the patch, The feature works as >> described and seems promising. The problem with compilation failure >> was probably reported on CirrusCI when compiled on different >> platforms. I have run the latest patch on my own Cirrus CI environment >> and everything checked out fine. > > Thank you for reviewing!
+ | a_expr AT LOCAL %prec AT
+ {
+ /* Use the value of the session's time zone */
+ FuncCall *tz =
makeFuncCall(SystemFuncName("current_setting"),
+
list_make1(makeStringConst("TimeZone", -1)),
+ COERCE_SQL_SYNTAX,
+ -1);
+ $$ = (Node *) makeFuncCall(SystemFuncName("timezone"),
+ list_make2(tz, $1),
+ COERCE_SQL_SYNTAX,
+ @2);
As the deparsing code introduced by this patch is showing, this leads
to a lot of extra complexity. And, actually, this can be quite
expensive as well with these two layers of functions. Note also that
in comparison to SQLValueFunctions, COERCE_SQL_SYNTAX does less
inlining. So here comes my question: why doesn't this stuff just use
one underlying function to do this job?
--
Michael
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