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MySQL Optimization: EXPLAIN Extra column contains Using Where Nullable columns do have overhead, because of the extra need to check for the null condition if a column doesn't have to be null, or your requirements don't allow for null, then definitely make the column not null As for the indexes, depends on the index construction If the index is defined with (a,b,c) and you're using b,c in your where clause, this index cannot be used as a is not in play
How does loggings extra argument work? - Stack Overflow I am struggling to figure out exactly how the extra argument for logging works I have some legacy code I need to change which uses it, and the code also requires logging to stdout import logging
NHibernate Lazy=Extra - Stack Overflow The lazy = extra allow to count the element of a collection without needing of fetching it, since the lazy entity is decorated with a proxy, when the client code ask for the Count on the collection, a proper " select count " query is issued to the database
Using --add-host or extra_hosts with docker-compose I am using docker-compose to run a test environment, that consists of about 5 different containers The inter-container links and the shared volumes (volumes-from) works wonderfully I also expose
Qt 5 build error: extra characters after test expression I am trying to learn Qt 5 3, and this is my first program (hello world) When I try to build, it displays this error: extra characters after test expression I cannot understand at all why this
Is there a simple way to remove multiple spaces in a string? 4 One line of code to remove all extra spaces before, after, and within a sentence: sentence = " The fox jumped over the log " sentence = ' ' join(filter(None,sentence split(' '))) Explanation: Split the entire string into a list Filter empty elements from the list Rejoin the remaining elements* with a single space
SSRS mysterious extra pages - Stack Overflow One thing that might help is to set your right margin to 0 in your master report I've noticed this myself with a subreport that appears correctly in a master report, and adding it as a subreport in another master causes it to insert extra page breaks I agree with TheTXI, its very frustrating, I wish they had a debug inspection mode like firebug does for web pages Edit: Also you should check