Daniel Black 553ef1a78b MDEV-13115: Implement SELECT SKIP LOCKED ... Adds an implementation for SELECT ... FOR UPDATE SKIP LOCKED / SELECT ... LOCK IN SHARED MODE SKIP LOCKED This is implemented only InnoDB at the moment, not in RockDB yet. This adds a new hander flag HA_CAN_SKIP_LOCKED than will be used when the storage engine advertises the flag. When a storage engine indicates this flag it will get TL_WRITE_SKIP_LOCKED and TL_READ_SKIP_LOCKED transaction types. The Lex structure has been updated to store both the FOR UPDATE/LOCK IN SHARE as well as the SKIP LOCKED so the SHOW CREATE VIEW implementation is simplier. "SELECT FOR UPDATE ... SKIP LOCKED" combined with CREATE TABLE AS or INSERT.. SELECT on the result set is not safe for STATEMENT based replication. MIXED replication will replicate this as row based events." Thanks to guidance from Facebook commit 193896c466 This helped verify basic test case, and components that need implementing (even though every part was implemented differently). Thanks Marko for guidance on simplier InnoDB implementation. Reviewers: Marko, Monty		2021-04-08 16:51:36 +10:00
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charsets	Merge 10.1 into 10.2	2019-05-13 17:54:04 +03:00
CMakeLists.txt	Merge 10.1 into 10.2	2019-05-13 17:54:04 +03:00
errmsg-utf8.txt	MDEV-13115: Implement SELECT SKIP LOCKED	2021-04-08 16:51:36 +10:00