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  1. MariaDB Server
  2. MDEV-17389

sql_mode=ORACLE: Incompatibility in datetime arithmetic

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: 5.5, 10.1, 10.2, 10.3, 10.4, 10.0
    • Fix Version/s: 10.4
    • Component/s: None
    • Labels:
      None

      Description

      Oracle and MariaDB return different results for TIMESTAMP+INTERVAL.

      Example #1:

      Oracle:

      ALTER SESSION SET NLS_DATE_FORMAT='yyyy-mm-dd';
      ALTER SESSION SET NLS_TIMESTAMP_FORMAT='YYYY-MM-DD HH24:MI:SS.FF6';
      SELECT TIMESTAMP'1000-01-01 00:00:00' + INTERVAL '3287175 23:59:59.999999' DAY(7) TO SECOND AS c1 FROM DUAL;
      

      C1
      ---------------------------------------------------------------------------
      9000-12-29 23:59:59.999999
      

      MariaDB:

      SELECT TIMESTAMP'1000-01-01 00:00:00' + INTERVAL '3287175 23:59:59.999999' DAY_MICROSECOND AS c1 FROM DUAL;
      

      +----------------------------+
      | c1                         |
      +----------------------------+
      | 9999-12-31 23:59:59.999999 |
      +----------------------------+
      

      PostgreSQL (yet another different result):

      SELECT TIMESTAMP'1000-01-01 00:00:00' + INTERVAL '3287175 23:59:59.999999'  DAY TO SECOND AS c1;
      

                   c1             
      ----------------------------
       9999-12-25 23:59:59.999999
      

      Example #2 (though the year of 0001 is outside of MariaDB DATETIME supported range):

      Oracle:

      ALTER SESSION SET NLS_DATE_FORMAT='yyyy-mm-dd';
      ALTER SESSION SET NLS_TIMESTAMP_FORMAT='YYYY-MM-DD HH24:MI:SS.FF6';
      SELECT TIMESTAMP'0001-01-01 00:00:00' + INTERVAL '3652058 23:59:59.999999' DAY(7) TO SECOND AS c1 FROM DUAL;
      

      C1
      ---------------------------------------------------------------------------
      9999-12-29 23:59:59.999999
      

      MariaDB

      SELECT TIMESTAMP'0001-01-01 00:00:00' + INTERVAL '3652058 23:59:59.999999' DAY_MICROSECOND AS c1 FROM DUAL;
      

      +----------------------------+
      | c1                         |
      +----------------------------+
      | 9999-12-31 23:59:59.999999 |
      +----------------------------+
      

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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                Dates

                Created:
                Updated: