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Stable13 #31

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Alena0704
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Добавила все коммиты, у которых проходят тесты (до d6bfb95)

danolivo added 20 commits June 12, 2021 16:13
…rgeAppend, a SubqueryScan nodes.

Tags: shardman.
Replace find_ok assert with elog panic message.
Improve the elog panic message introduced in previous commit.
Fix ForeignScan estimation logic.
Switch from AQO_EXPLAIN define to the two user GUCS: aqo.details
and aqo.show_hash.

New ExplainOneNode hook allows to add info into explain of each node.
AQO supports push-down of trivial JOIN and JOIN with mergejoinable clauses.
short-living planner memory context.

Some indentations fixed.
Big commit. To avoiding UPDATE/UPDATE/DELETE/INSERT conflicts we
use user locks on a pair (query_hash, fspace_hash) to guarantee that
only one backend can do INSERT/UPDATE/DELETE of a aqo table row.
Also we use dirty snapshot to see concurrently inserted/updated tuples.
Such conflict may cause deadlocks on end-of-transaction waiting.
Currently, if we detected such conflict, we refuse from we ML-base
changing.
@danolivo
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Так вроде уже предыдущий пулл-реквест все добавил, нет?

@danolivo danolivo closed this Jun 18, 2021
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