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Re: Creating sort index cause shared lock
Posted by: Rick James
Date: May 23, 2016 03:05PM

* Change LEFT JOIN to simply JOIN -- unless LEFT is really indicated. (It is definitely not needed for `released`.)

* Start with simply
SELECT @var_tmp_start_date = CASE ...

* Use COALESCE() instead of CASE if practical;

* If this is part of a transaction, either remove it from the transaction or show us more of the transaciton.

* SHOW CREATE TABLE -- we need to make sure you have the optimal indexes.

Note: With those changes and added info, I hope to

* Discover why there is a "shared" lock, and/or

* Speed up the query enough so that the lock is not a serious concern.

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Re: Creating sort index cause shared lock
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May 23, 2016 03:05PM


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