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Amit Langote 847ee701bd SQL/JSON: Some fixes to JsonBehavior expression casting 
1. Remove the special case handling when casting the JsonBehavior
   expressions to types with typmod, like 86d33987 did for the casting
   of SQL/JSON constructor functions.

2. Fix casting for fixed-length character and bit string types by
   using assignment-level casts.  This is again similar to what
   86d33987 did, but for ON ERROR / EMPTY expressions.

3. Use runtime coercion for the boolean ON ERROR constants so that
   using fixed-length character string types, for example, for an
   EXISTS column doesn't cause a "value too long for type
   character(n)" when the parser tries to coerce the default ON ERROR
   value "false" to that type, that is, even when clause is not
   specified.

4. Simplify the conditions of when to use runtime coercion vs
   creating the cast expression in the parser itself.  jsonb-valued
   expressions are now always coerced at runtime and boolean
   expressions too if the target type is a string type for the
   reasons mentioned above.

New tests are from a patch that Jian He posted.  Outputs of some
existing tests change because the coercion now happens at runtime
instead of at parse time.

Reported-by: Jian He <jian.universality@gmail.com>
Author: Jian He <jian.universality@gmail.com>
Author: Amit Langote <amitlangote09@gmail.com>
Discussion: https://postgr.es/m/CACJufxEo4sUjKCYtda0_qt9tazqqKPmF1cqhW9KBOUeJFqQd2g@mail.gmail.com
Backpatch-through: 17
2024-07-30 10:37:56 +09:00
..
backend SQL/JSON: Some fixes to JsonBehavior expression casting 2024-07-30 10:37:56 +09:00
bin Count individual SQL commands in pg_restore's --transaction-size mode. 2024-07-29 12:17:24 -04:00
common Typo fix 2024-07-08 22:12:42 +09:00
fe_utils Fix PL/pgSQL's handling of integer ranges containing underscores. 2024-06-04 11:48:01 +01:00
include Wait for WAL summarization to catch up before creating .partial file. 2024-07-26 14:51:10 -04:00
interfaces libpq: Use strerror_r instead of strerror 2024-07-28 10:19:57 +02:00
makefiles Optimize pg_popcount() with AVX-512 instructions. 2024-04-06 21:56:23 -05:00
pl Doc: improve description of plpgsql's FETCH and MOVE commands. 2024-07-22 19:43:27 -04:00
port Pre-beta mechanical code beautification. 2024-05-14 16:34:50 -04:00
template Remove AIX support 2024-02-28 15:17:23 +04:00
test SQL/JSON: Some fixes to JsonBehavior expression casting 2024-07-30 10:37:56 +09:00
timezone Update time zone data files to tzdata release 2024a. 2024-02-01 15:57:53 -05:00
tools ci: Pin MacPorts version to 2.9.3. 2024-07-25 14:48:18 +12:00
tutorial Update copyright for 2024 2024-01-03 20:49:05 -05:00
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Makefile Remove distprep 2023-11-06 15:18:04 +01:00
Makefile.global.in Update Unicode data to CLDR 45 2024-04-22 09:16:33 +02:00
Makefile.shlib Remove AIX support 2024-02-28 15:17:23 +04:00
meson.build Update copyright for 2024 2024-01-03 20:49:05 -05:00
nls-global.mk Remove distprep 2023-11-06 15:18:04 +01:00