Horton

Re: automatically generating node support functions

Amit Kapila <amit.kapila16@gmail.com>

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From: Amit Kapila <amit.kapila16@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Peter Eisentraut <peter.eisentraut@enterprisedb.com>, Andres Freund <andres@anarazel.de>, David Rowley <dgrowleyml@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2022-08-05T12:22:36Z
Lists: pgsql-hackers 
On Wed, Aug 3, 2022 at 7:16 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Amit Kapila <amit.kapila16@gmail.com> writes:
> > I have a question related to commit 964d01ae90. Today, after getting
> > the latest code, when I compiled it on my windows machine, it lead to
> > a compilation error because the outfuncs.funcs.c was not regenerated.
> > I did the usual steps which I normally perform after getting the
> > latest code (a) run "perl mkvcbuild.pl" and (b) then build the code
> > using MSVC. Now, after that, I manually removed "node-support-stamp"
> > from folder src/backend/nodes/ and re-did the steps and I see that the
> > outfuncs.funcs.c got regenerated, and the build is also successful. I
> > see that there is handling to clean the file "node-support-stamp" in
> > nodes/Makefile but not sure how it works for windows. I think I am
> > missing something here. Can you please guide me?
>
> More likely, we need to add something explicit to Mkvcbuild.pm
> for this.  I recall that it has stanzas to deal with updating
> other autogenerated files; I bet we either missed that or
> fat-fingered it for node-support-stamp.
>

I see below logic added by commit which seems to help regenerate the
required files.

+++ b/src/tools/msvc/Solution.pm
@@ -839,6 +839,54 @@ EOF
        close($chs);
    }

+   if (IsNewer(
+           'src/backend/nodes/node-support-stamp',
+           'src/backend/nodes/gen_node_support.pl'))
...
...

Now, in commit 1349d2790b, we didn't change anything in
gen_node_support.pl but changed "typedef struct AggInfo" due to which
we expect the files like outfuncs.funcs.c gets regenerated. However,
as there is no change in gen_node_support.pl, the files didn't get
regenerated.

-- 
With Regards,
Amit Kapila.

Commits

  1. Fix MSVC build script's check for obsolete node support functions.

  2. Improve performance of ORDER BY / DISTINCT aggregates

  3. doc: Fix typos in protocol.sgml

  4. Tighten up parsing logic in gen_node_support.pl.

  5. Add defenses against unexpected changes in the NodeTag enum list.

  6. Add copy/equal support for XID lists

  7. Rationalize order of input files for gen_node_support.pl.

  8. Make assorted quality-of-life improvements in gen_node_support.pl.

  9. Doc: rearrange high-level commentary about node support coverage.

  10. Automatically generate node support functions

  11. Adjust node serialization tag of A_Expr for consistency

  12. Remove T_Join and T_Plan

  13. Reformat some more node comments

  14. Reformat some node comments

  15. Remove JsonPathSpec typedef

  16. Add missing enum tag in enum used in nodes

  17. Add Cardinality typedef

  18. Make node output prefix match node structure name

  19. Add WRITE_INDEX_ARRAY

  20. Add COPY_ARRAY_FIELD and COMPARE_ARRAY_FIELD

  21. Remove T_Expr

  22. Change NestPath node to contain JoinPath node

  23. Change SeqScan node to contain Scan node

  24. Check the size in COPY_POINTER_FIELD

  25. Remove T_MemoryContext

  26. Add missing enum tags in enums used in nodes

  27. Rename some node support functions for consistency

  28. Rename argument of _outValue()

  29. Rename NodeTag of ExprState