Sergei Golubchik c7c481f4d9 MDEV-20403 Assertion 0' or Assertion btr_validate_index(index, 0)' failed in row_upd_sec_index_entry or error code 126: Index is corrupted upon UPDATE with TIMESTAMP..ON UPDATE ...

Three issues here:
* ON UPDATE DEFAULT NOW columns were updated after generated columns
  were computed - this broke indexed virtual columns
* ON UPDATE DEFAULT NOW columns were updated after BEFORE triggers,
  so triggers didn't see the correct NEW value
* in case of a multi-update generated columns were also updated
  after BEFORE triggers

2019-09-03 20:34:30 +02:00

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