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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

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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
This commit is contained in:
Sergei Golubchik
2019-09-02 14:10:20 +02:00
parent 3789692d17
commit c7c481f4d9
4 changed files with 65 additions and 14 deletions
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10
sql/sql_base.cc
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@ -8071,9 +8071,13 @@ fill_record(THD *thd, TABLE *table_arg, List<Item> &fields, List<Item> &values,
rfield->set_explicit_default(value);
}
if (!update && table_arg->default_field &&
table_arg->update_default_fields(ignore_errors))
goto err;
if (update)
table_arg->evaluate_update_default_function();
else
if (table_arg->default_field &&
table_arg->update_default_fields(ignore_errors))
goto err;
/* Update virtual fields */
if (table_arg->vfield &&
table_arg->update_virtual_fields(table_arg->file, VCOL_UPDATE_FOR_WRITE))