Horton

Fix JsonExpr deparsing to emit QUOTES and WRAPPER correctly

Amit Langote <amitlan@postgresql.org>

View on postgr.es
Commit: f6a2529920cff76cb6e37ea840122574404dde8b
Author: Amit Langote <amitlan@postgresql.org>
Date: 2024-04-08T07:14:12Z
Releases: 17.0 
Fix JsonExpr deparsing to emit QUOTES and WRAPPER correctly

Currently, get_json_expr_options() does not emit the default values
for QUOTES (KEEP QUOTES) and WRAPPER (WITHOUT WRAPPER).  That causes
the deparsed JSON_TABLE() columns, such as those contained in a a
view's query, to behave differently when executed than the original
definition.  That's because the rules encoded in
transformJsonTableColumns() will choose either JSON_VALUE() or
JSON_QUERY() as implementation to execute a given column's path
expression depending on the QUOTES and WRAPPER specificationd and
they have slightly different semantics.

Reported-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxEqhqsfrg_p7EMyo5zak3d767iFDL8vz_4%3DZBHpOtrghw%40mail.gmail.com

Files

PathChange+/−
src/backend/utils/adt/ruleutils.c modified +6 −0
src/test/regress/expected/sqljson_jsontable.out modified +22 −22
src/test/regress/expected/sqljson_queryfuncs.out modified +13 −13

Discussion