Aleksey Midenkov c4a2688328 MDEV-24726 Assertion on compressed varstring as key field in optimizer ...

temporary table

Compressed field cannot be part of a key by its nature: there is no
data to order, only the compressed data.

For optimizer temporary table we create uncompressed substitute.

In all other cases (MDEV-16808) we don't use key: add_keyuse() is
skipped by !field->compression_method() condition.

2025-07-08 11:44:49 +03:00

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