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How locks work with move partition ONLINE on Oracle 12c

With the release 12c Oracle introduced the “online partition movement” making the operation a non-blocking DDL command. This means that it’s possible to run any DML on a partition while the same is being “moved” using the new ONLINE option.
Let’s see how that works on our usual test table populated with 1 million rows in the first partition

We can now take a look at how move partition works normally when not running it in ONLINE mode.
Let’s execute

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