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Unnest IN/ANY/EXISTS subqueries and optimize them using semi-join algorithm #8061

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@dyemanov dyemanov commented Apr 1, 2024

The initial implementation was developed by customer request, later it was slightly improved and committed into a separate branch for testing. Some issues were found that prevented it from inclusion into v5.0. Still work in progress.

…eimplemented support for semi/anti joins inside the nested loop algorithm. Slightly changed implementation of full outer joins. Added transformation of IN/EXISTS subqueries into lateral semi-joins. Basic optimizer support for semi-joins. More efficient optimization for cross joins. Added some debug info (hash table statistics) for hash joins.
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A partial implementation (covering only equivalence conditions) is committed into v5.0.1, but disabled by default (see SubQueryConversion setting in firebird.conf).

actions-user and others added 22 commits November 16, 2024 16:27
…8046)

* Postfix for #7989 - Improve performance of external (UDR) functions.

* Extract common functions.

* Fix profiler request time for external functions.

* Change cancellation detection for external functions.

* Move new private code to anonymous namesapce and rename functions.
Co-authored-by: Artyom Abakumov <artyom.abakumov@red-soft.ru>
…e from backup (FB5, RC2)

Don't use common SortOwner for sorts with different dbb's.
After #7671 it could contain cached sort buffers from different pools (dbb_permanent) and then release it to the wrong dbb_sort_buffers making possible usage of deallocated memory later.
…(this time about short unpacked fragments)
* Add missing synchronization to cached vectors of known pages. Thanks to Vlad Khorsun.

* Fixed typo
marat-iskakov and others added 30 commits November 16, 2024 16:27
Co-authored-by: MaratIskakov <maratiskakov@10.0.2.15>
…uring flush) with small number of DefaultDbCachePages
… introducing GUID-v7 (#8188)

Replacing deprecated win32 crypto functions.
Do not fail packaging if qsg is not found
Fail packaging if ib_util.* not found
white space
* Delete tra_dbcreators_list in ~jrd_tra

If we don't delete it manually assert will be thrown if SEC$DB_CREATORS returns a lot of records

* Add missing default initialization for tra_dbcreators_list

---------

Co-authored-by: Artyom Ivanov <artyom.ivanov@red-soft.ru>
Fixed bug #8203 : Function MAKE_DBKEY may produce random errors if used with relation name
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