Is there a detailed source for when innodb creates row or table locks?
I have a situation where one thread is performing this in one
transaction:
UPDATE SomeTable SET .... WHERE SomeTable.id = N;
This is invoked after another thread has kicked off this long running
query in another transaction:
UPDATE AnotherTable
SET ...
WHERE EXISTS(
SELECT null
FROM SomeTable
WHERE SomeTable.id = AnotherTable.id );
Would this create a conflicting lock? I am getting "Lock wait timeout
exceeded" on SomeTable fro the UPDATE to SomeTable.
TIA,
R.
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