From: Amit Langote <amitlan@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Fix error reporting for SQL/JSON path type mismatches
Date: Thu, 27 Nov 2025 03:12:22 +0000
Message-ID: <E1vOSQg-001avB-0V@gemulon.postgresql.org> (raw)
Fix error reporting for SQL/JSON path type mismatches
transformJsonFuncExpr() used exprType()/exprLocation() on the
possibly coerced path expression, which could be NULL when
coercion to jsonpath failed, leading to "cache lookup failed
for type 0" errors.
Preserve the original expression node so that type and location
in the "must be of type jsonpath" error are reported correctly.
Add regression tests to cover these cases.
Reported-by: Jian He <jian.universality@gmail.com>
Author: Jian He <jian.universality@gmail.com>
Reviewed-by: Kirill Reshke <reshkekirill@gmail.com>
Discussion: https://postgr.es/m/CACJufxHunVg81JMuNo8Yvv_hJD0DicgaVN2Wteu8aJbVJPBjZA@mail.gmail.com
Backpatch-through: 17
Branch
------
REL_18_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/15ba0702c1ae9d46f49a6e1f80db99167d3aedf7
Modified Files
--------------
src/backend/parser/parse_expr.c | 23 +++++++++++++++--------
src/test/regress/expected/sqljson_queryfuncs.out | 8 ++++++++
src/test/regress/sql/sqljson_queryfuncs.sql | 2 ++
3 files changed, 25 insertions(+), 8 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: amitlan@postgresql.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Fix error reporting for SQL/JSON path type mismatches
In-Reply-To: <E1vOSQg-001avB-0V@gemulon.postgresql.org>
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