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  1. MariaDB Server
  2. MDEV-5911

CAST(SUM(double_field) AS SIGNED) returns a wrong result

        Details

        • Type: Bug
        • Status: Open
        • Priority: Minor
        • Resolution: Unresolved
        • Affects Version/s: 5.5.36, 10.0.9
        • Fix Version/s: 10.0
        • Component/s: None
        • Labels:
          None

          Description

          This SQL script:

          DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a DOUBLE);
INSERT INTO t1 VALUES (1e30);
SELECT SUM(a), CAST(SUM(a) AS SIGNED) FROM t1;

          returns a wrong result for CAST(SUM(a) AS SIGNED):

          +--------+------------------------+
| SUM(a) | CAST(SUM(a) AS SIGNED) |
+--------+------------------------+
|   1e30 |   -9223372036854775808 |
+--------+------------------------+

          The expected result is +9223372036854775807,
          which is the maximum possible positive signed integer value.

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                  • Assignee:
                    bar Alexander Barkov
                    Reporter:
                    bar Alexander Barkov
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                    Dates

                    • Created:
                      Updated: