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    MDEV-452 Add full support for auto-initialized/updated timestamp and datetime · bc4a4567
    unknown authored
    Generalized support for auto-updated and/or auto-initialized timestamp
    and datetime columns. This patch is a reimplementation of MySQL's
    "WL#5874: CURRENT_TIMESTAMP as DEFAULT for DATETIME columns". In order to
    ease future merges, this implementation reused few function and variable
    names from MySQL's patch, however the implementation is quite different.
    
    TODO:
    The only unresolved problem in this patch is the semantics of LOAD DATA for
    TIMESTAMP and DATETIME columns in the cases when there are missing or NULL
    columns. I couldn't fully comprehend the logic behind MySQL's behavior and
    its relationship with their own documentation, so I left the results to be
    more consistent with all other LOAD cases.
    
    The problematic test cases can be seen by running the test file function_defaults,
    and observing the test case differences. Those were left on purpose for discussion.
    bc4a4567
sql_table.cc 251 KB