pgsql: Rationalize handling of array type names in bootstrap data.

Rationalize handling of array type names in bootstrap data.

Formerly, Catalog.pm turned a C array type declaration in the catalog
header files into a SQL type, e.g., 'foo[]'. Along the way, genbki.pl
turned this into '_foo' for the purpose of type lookups, but wrote 'foo[]'
to postgres.bki. During bootstrap, bootscanner.l had to have a special
case rule to tokenize this, and then MapArrayTypeName() would turn 'foo[]'
into '_foo' one more time.

This seems unnecessarily complicated, especially since nobody cares that
much about the readability of postgres.bki. Instead, make Catalog.pm
convert the C declaration into '_foo' to start with, and preserve that
representation of the type name throughout bootstrap data processing.
Then rip out the special-case code in bootscanner.l and bootstrap.c.

This changes postgres.bki to the extent that array fields are now
declared like
proconfig = _text ,
rather than
proconfig = text[] ,

No documentation update, since the SGML docs didn't mention any of this
in the first place, and it's all pretty transparent to writers of
catalog header files anyway.

John Naylor

Discussion: https://postgr.es/m/CAJVSVGUNao=-Q2-vAN3PYcdF5tnL5JAHwGwzZGuYHtq+Mk_9ng@mail.gmail.com

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/9ffcccdb958d38db5051bf64143330ff445a26cc

Modified Files
--------------
src/backend/bootstrap/bootscanner.l | 6 ------
src/backend/bootstrap/bootstrap.c | 30 ------------------------------
src/backend/catalog/Catalog.pm | 8 ++++++--
src/backend/catalog/genbki.pl | 8 ++------
src/include/bootstrap/bootstrap.h | 2 --
5 files changed, 8 insertions(+), 46 deletions(-)