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From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: hackerzheng666@gmail.com
Subject: BUG #19630: FOR PORTION OF crashes with XX000 when target range is NULL
Date: Wed, 19 Aug 2026 03:51:32 +0000
Message-ID: <19630-9f10ca28426295fa@postgresql.org> (raw)

The following bug has been logged on the website:

Bug reference:      19630
Logged by:          Zheng Hacker
Email address:      hackerzheng666@gmail.com
PostgreSQL version: 19beta3
Operating system:   Linux x86_64
Description:        

PostgreSQL version: 20devel (commit bdbf662, 2026-08-19)
  OS: Linux x86_64
  
  When a DELETE/UPDATE ... FOR PORTION OF receives a NULL range
  target, it hits elog(ERROR) without errcode() in nodeModifyTable.c,
  producing SQLSTATE XX000 instead of a proper error.
  
  Reproducer:
  
  CREATE TABLE t (
    id int4range NOT NULL,
    valid_at daterange NOT NULL,
    name text NOT NULL,
    CONSTRAINT t_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
  );
  INSERT INTO t (id, valid_at, name)
    VALUES ('[1,2)', '[2018-01-02,2020-01-01)', 'one');
    
  DELETE FROM t FOR PORTION OF valid_at (NULL) WHERE id = '[1,2)';
  -- ERROR: XX000: FOR PORTION OF target was null
  -- LOCATION: ExecInitModifyTable, nodeModifyTable.c:5647
  
  Expected: a proper SQLSTATE (e.g. 22004 null_value_not_allowed).

  Found by automated SQL fuzzing.
  Credit: Zheng Wang, Yanjie Zhao, Yiyang Liu

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