Thread: General Bug Report: Incorrect subtraction - rounding error - should NOT round!
General Bug Report: Incorrect subtraction - rounding error - should NOT round!
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============================================================================ POSTGRESQL BUG REPORT TEMPLATE ============================================================================ Your name : Jeffrey Springer Your email address : jspringr@savemail.com Category : runtime: back-end: SQL Severity : critical Summary: Incorrect subtraction - rounding error - should NOT round! System Configuration -------------------- Operating System : FreeBSD 2.2.7 PostgreSQL version : 6.3.2 Compiler used : gcc 2.7 Hardware: --------- AMD K6 with 32M Ram Versions of other tools: ------------------------ gmake -------------------------------------------------------------------------- Problem Description: -------------------- I put together a banking web-site using Postgres. I put a check and deducted the amount from the balance column of the bank_account table. The result was incorrect so I tested it inside psql instead of my C++ program but got the same result. -------------------------------------------------------------------------- Test Case: ---------- template1=> select 166952.9 - 166384.34 ; ?column? ---------------- 568.559999999998 (1 row) -------------------------------------------------------------------------- Solution: --------- --------------------------------------------------------------------------