branch-2.1: [fix](decimal)Fix the issue where decimal multiplication produces incorrect results due to mul_overflow error #51533 #51563
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…orrect results due to mul_overflow error (#51533) ### What problem does this PR solve? Previously, when multiplying -15687000000000000000000 (int128) by 11000000000000000 (int128), the mul_overflow function would incorrectly return false (indicating no overflow) ``` mysql> select -15687.000000000000000000 * 0.011000000000000000; +--------------------------------------------------+ | -15687.000000000000000000 * 0.011000000000000000 | +--------------------------------------------------+ | 167.725366920938463463374607431768211 | +--------------------------------------------------+ ``` now ``` mysql> select -15687.000000000000000000 * 0.011000000000000000; +--------------------------------------------------+ | -15687.000000000000000000 * 0.011000000000000000 | +--------------------------------------------------+ | -172.557000000000000000000000000000000 | +--------------------------------------------------+ ```
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yiguolei
approved these changes
Jun 7, 2025
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Cherry-picked from #51533