Fix PASSING of toasted text values in JSON query functions The PASSING arguments of JSON_EXISTS(), JSON_QUERY(), JSON_VALUE() and JSON_TABLE() are evaluated by plain expression steps and given to the jsonpath executor as-is.
When dealing with a varlena, JsonItemFromDatum() was building a jbvString directly the contents of a varlena. For a varatt_external (varatt_external[oid/oid8] on HEAD), this ignored that the contents of the varlena need to be detoasted, leading to incorrect contents returned. Let's detoast the value, like the jsonb and json cases. b0feda79fdf0 has fixed the same issue for subscript values in jsonb. Note that the results of DatumGetTextPP() are allocated in the memory context used for the evaluation of the expression, which is reset once per row. Oversight in 6185c9737cf4. Author: Chaitanya Choudhary <[email protected]> Author: Shihao Zhong <[email protected]> Discussion: https://postgr.es/m/[email protected] Backpatch-through: 17 Branch ------ REL_19_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/fdb88a51cda0ec0e09b986ec68bcea3935424794 Modified Files -------------- src/backend/utils/adt/jsonpath_exec.c | 12 +++++++---- src/test/regress/expected/sqljson_queryfuncs.out | 26 ++++++++++++++++++++++++ src/test/regress/sql/sqljson_queryfuncs.sql | 16 +++++++++++++++ 3 files changed, 50 insertions(+), 4 deletions(-)
