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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 | eaf99e4c4ae4084b8261e5e1f9c2c93004a98638 (patch) | |
| tree | 4432e741afe2b22cc98fa1b9ada1e4572b432173 /src/backend/executor/nodeGatherMerge.c | |
| parent | f06156da18f67bc2c904c0a76b70dafcb14ca7c2 (diff) | |
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/executor/nodeGatherMerge.c')
0 files changed, 0 insertions, 0 deletions