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Tom Lane da7a1dc0d6 Refactor att_align_nominal() to improve performance. ... Separate att_align_nominal() into two macros, similarly to what was already done with att_align_datum() and att_align_pointer(). The inner macro att_nominal_alignby() is really just TYPEALIGN(), while att_align_nominal() retains its previous API by mapping TYPALIGN_xxx values to numbers of bytes to align to and then calling att_nominal_alignby(). In support of this, split out tupdesc.c's logic to do that mapping into a publicly visible function typalign_to_alignby(). Having done that, we can replace performance-critical uses of att_align_nominal() with att_nominal_alignby(), where the typalign_to_alignby() mapping is done just once outside the loop. In most places I settled for doing typalign_to_alignby() once per function. We could in many places pass the alignby value in from the caller if we wanted to change function APIs for this purpose; but I'm a bit loath to do that, especially for exported APIs that extensions might call. Replacing a char typalign argument by a uint8 typalignby argument would be an API change that compilers would fail to warn about, thus silently breaking code in hard-to-debug ways. I did revise the APIs of array_iter_setup and array_iter_next, moving the element type attribute arguments to the former; if any external code uses those, the argument-count change will cause visible compile failures. Performance testing shows that ExecEvalScalarArrayOp is sped up by about 10% by this change, when using a simple per-element function such as int8eq. I did not check any of the other loops optimized here, but it's reasonable to expect similar gains. Although the motivation for creating this patch was to avoid a performance loss if we add some more typalign values, it evidently is worth doing whether that patch lands or not. Discussion: https://postgr.es/m/1127261.1769649624@sss.pgh.pa.us		1 month ago
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expected	oauth: Disallow OAuth connections via postgres_fdw/dblink	10 months ago
sql	oauth: Disallow OAuth connections via postgres_fdw/dblink	10 months ago
t	Update copyright for 2026	2 months ago
.gitignore	Support "make check" in contrib	15 years ago
Makefile	dblink: SCRAM authentication pass-through	11 months ago
dblink--1.0--1.1.sql	Fix typo in update scripts for some contrib modules.	13 years ago
dblink--1.1--1.2.sql	Fix parallel-safety markings for contrib/dblink.	10 years ago
dblink--1.2.sql	Fix parallel-safety markings for contrib/dblink.	10 years ago
dblink.c	Refactor att_align_nominal() to improve performance.	1 month ago
dblink.control	Update dblink extension for parallel query.	10 years ago
meson.build	Update copyright for 2026	2 months ago
pg_service.conf	Diagnose incompatible OpenLDAP versions during build and test.	12 years ago