Refactor error messages to reduce duplication
I also took the liberty of changing
errmsg("COPY DEFAULT only available using COPY FROM")
to
errmsg("COPY %s cannot be used with %s", "DEFAULT", "COPY TO")
because the original wording is unlike all other messages that indicate
option incompatibility. This message was added by commit 9f8377f7a279
(16-era), in whose development thread there was no discussion on this
point.
Backpatch to 17.
Branch
------
REL_17_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/28b953f26343105ebf3a1a212092e2c3c0bb0914
Modified Files
--------------
src/backend/commands/copy.c | 76 +++++++++++++++++++++++++++----------
src/backend/commands/copyfrom.c | 10 +++--
src/backend/commands/copyto.c | 5 ++-
src/test/regress/expected/copy2.out | 4 +-
4 files changed, 66 insertions(+), 29 deletions(-)
