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authorDean Rasheed <dean.a.rasheed@gmail.com>2023-11-09 09:53:05 +0000
committerDean Rasheed <dean.a.rasheed@gmail.com>2023-11-09 09:53:05 +0000
commitc396aca2b712f7872dcc4641a2a0fa553f232f76 (patch)
tree55d944e4fa7bfa450ec1c0b5355d332ee560fa02 /src/backend/executor/nodeModifyTable.c
parent179c4639cf1dcbe54f3469d7f44a11f172332893 (diff)
downloadpostgresql-c396aca2b712f7872dcc4641a2a0fa553f232f76.tar.gz
postgresql-c396aca2b712f7872dcc4641a2a0fa553f232f76.zip
Fix corner-case 64-bit integer subtraction bug on some platforms.
When computing "0 - INT64_MIN", most platforms would report an overflow error, which is correct. However, platforms without integer overflow builtins or 128-bit integers would fail to spot the overflow, and incorrectly return INT64_MIN. Back-patch to all supported branches. Patch be me. Thanks to Jian He for initial investigation, and Laurenz Albe and Tom Lane for review. Discussion: https://postgr.es/m/CAEZATCUNK-AZSD0jVdgkk0N%3DNcAXBWeAEX-QU9AnJPensikmdQ%40mail.gmail.com
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