Aleksey Midenkov 1e7d451e99 MDEV-37404 InnoDB: Failing assertion: node->pcur->rel_pos == BTR_PCUR_ON ...

Caused by optimization done in 2e2b2a0469.

Cannot use lookup_handler in default branch of locate_dup_record() as
InnoDB update depends on positioned record and update is done in table
main handler.

The patch reverts some non-pure changes done by 2e2b2a0469 to
original logic from 72429cad. There was no long_unique_table condition
to init search on table->file, so we get into default branch with long
unique and table->file search uninitialized.

ha_rnd_init_with_error() on demand for HA_DUPLICATE_POS branch was
original logic as well.

More info: 2e2b2a0469 reverts 5e345281e3, but it seems to be OK as
MDEV-3888 test case passes. mysql-5.6.13 has the original code with
HA_WHOLE_KEY as well.

2025-09-19 12:44:08 +03:00

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