The 7th alpha resease of OrioleDB incorporates the following changes.

• Make OrioleDB work with data directories initialized without patches,
• Fix crashes due to wrong usage of o_handle_startup_proc_interrupts_hook(),
• Fix crashed due to missing o_btree_load_shmem() during INSERT ... ON CONFLICT ...,
• Fix eviction and checkpointing of temporary trees,
• Fix accessing unlocked pages during checkpointing,
• Fix page merging concurrency,
• FIx page corruption during undo rollback,
• Fix concurrency during reading transaction CSN,
• Fix concurrency for unique checking,
• FIx deadlocks during accessing tree meta information,
• Add overflow check to add_invalidate_wal_record(),
• Fix crashed when replaying joint commits,
• Fix ON CONFLICT for unique index without primary key,
• Fix update of renamed column,
• Add support for MERGE command with tests,
• Fix concurrent DROP TABLE issue.