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  1. MariaDB Server
  2. MDEV-19502

TIME_ROUND_FRACTIONAL is not respected on TIME->BIGINT conversion

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      Description

      MySQL rounds fractional seconds on implicit TIME->BIGINT conversion and on explicit CAST:

      SET sql_mode=''; -- MySQL rounds by default
      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a BIGINT);
      INSERT INTO t1 VALUES (TIME'-00:00:01.6');
      SELECT a, CAST(TIME'-00:00:01.6' AS SIGNED) FROM t1;
      

      +------+-----------------------------------+
      | a    | CAST(TIME'-00:00:01.6' AS SIGNED) |
      +------+-----------------------------------+
      |   -2 |                                -2 |
      +------+-----------------------------------+
      

      MariaDB truncates:

      SET sql_mode='TIME_ROUND_FRACTIONAL';
      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a BIGINT);
      INSERT INTO t1 VALUES (TIME'-00:00:01.6');
      SELECT a, CAST(TIME'-00:00:01.6' AS SIGNED) FROM t1;
      

      +------+-----------------------------------+
      | a    | CAST(TIME'-00:00:01.6' AS SIGNED) |
      +------+-----------------------------------+
      |   -1 |                                -1 |
      +------+-----------------------------------+
      

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              • Assignee:
                bar Alexander Barkov
                Reporter:
                bar Alexander Barkov
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                • Created:
                  Updated: