Oleg Smirnov d6c6102cad MDEV-30828 Prevent pushing down unions with incorrect ORDER BY ...

Fake_select_lex->join was prepared at the unit execution stage so
the validation of fake_select_lex before the unit pushdown
was incomplete. That caused pushing down of statements having
an incorrect ORDER BY clause.
This commit moves preparation of the fake_select_lex->join to the unit
prepare() method, before initializing of the pushdown handler,
so incorrect clauses error out before being pushed down

2023-06-30 12:36:47 +07:00

89 KiB

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