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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2023-05-16 10:53:42 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2023-05-16 10:53:42 -0400 |
| commit | 1d369c9e90f311ec98b07a259cac48c404c773d5 (patch) | |
| tree | f4acf82756eee58cb7e1f7d4d1e14d6f80d59acc /src/backend/catalog/system_functions.sql | |
| parent | 27debd05dcbdfe3db487ba82568f7f9ae25ddde2 (diff) | |
| download | postgresql-1d369c9e90f311ec98b07a259cac48c404c773d5.tar.gz | |
Ensure Soundex difference() function handles empty input sanely.
fuzzystrmatch's difference() function assumes that _soundex()
always initializes its output buffer fully. This was not so for
the case of a string containing no alphabetic characters, resulting
in unstable output and Valgrind complaints.
Fix by using memset() to fill the whole buffer in the early-exit
case. Also make some cosmetic improvements (I didn't care for the
random switches between "instr[0]" and "*instr" notation).
Report and diagnosis by Alexander Lakhin (bug #17935).
Back-patch to all supported branches.
Discussion: https://postgr.es/m/17935-b99316aa79c18513@postgresql.org
Diffstat (limited to 'src/backend/catalog/system_functions.sql')
0 files changed, 0 insertions, 0 deletions