Add to_regtypemod function to extract typemod from a string type name. In combination with to_regtype, this allows converting a string to the "canonicalized" form emitted by format_type. That usage requires parsing the string twice, which is slightly annoying but not really too expensive. We considered alternatives such as returning a record type, but that way was notationally uglier than this, and possibly less flexible.
Like to_regtype(), we'd rather that this return NULL for any bad input, but the underlying type-parsing logic isn't yet capable of not throwing syntax errors. Adjust the documentation for both functions to point that out. In passing, fix up a couple of nearby entries in the System Catalog Information Functions table that had not gotten the word about our since-v13 convention for displaying function usage examples. David Wheeler and Erik Wienhold, reviewed by Pavel Stehule, Jim Jones, and others. Discussion: https://postgr.es/m/df2324ca-2673-4abe-b382-26b5770b6...@justatheory.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/1218ca9956ee60afc6975f14c1a4c953bd6bbaa7 Modified Files -------------- doc/src/sgml/func.sgml | 77 +++++++++++++++++++++-------------- src/backend/utils/adt/regproc.c | 20 +++++++++ src/include/catalog/catversion.h | 2 +- src/include/catalog/pg_proc.dat | 3 ++ src/test/regress/expected/regproc.out | 37 +++++++++++++++++ src/test/regress/sql/regproc.sql | 8 ++++ 6 files changed, 115 insertions(+), 32 deletions(-)
