From: Masahiko Sawada <msawada@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: test_decoding: Don't print virtual generated columns.
Date: Tue, 18 Aug 2026 20:57:40 +0000
Message-ID: <E1wwQsN-000000016zx-0qvO@gemulon.postgresql.org> (raw)
test_decoding: Don't print virtual generated columns.
Virtual generated columns are stored in tuples as null values, so
heap_getattr() in tuple_to_stringinfo() always returns null for them.
test_decoding printed such a column as null, which is
indistinguishable from a column that genuinely holds null.
This commit skips virtual generated columns in tuple_to_stringinfo(),
the only place that prints a tuple. Stored generated columns continue
to be printed, since their values do live in the heap tuple.
This is a behavior change rather than a bug fix, and it changes
test_decoding's output for tables that have virtual generated columns,
which could affect consumers that parse it. Therefore it is not
back-patched.
Author: SATYANARAYANA NARLAPURAM <satyanarlapuram@gmail.com>
Co-authored-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Reviewed-by: Euler Taveira <euler@eulerto.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/CAHg+QDfTh3UbB-Ed--o2Bd=SBDJoEiG-qp3C0+ETDibF63y=dw@mail.gmail.com
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/755f7e2c921f16e6bc09bdc8d286c495b2cee93b
Modified Files
--------------
contrib/test_decoding/expected/ddl.out | 18 ++++++++++++++++++
contrib/test_decoding/sql/ddl.sql | 12 ++++++++++++
contrib/test_decoding/test_decoding.c | 10 ++++++++++
3 files changed, 40 insertions(+)
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To: pgsql-committers@postgresql.org
Cc: msawada@postgresql.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: test_decoding: Don't print virtual generated columns.
In-Reply-To: <E1wwQsN-000000016zx-0qvO@gemulon.postgresql.org>
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