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Which are more performant, CTE or temporary tables?
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Only 15 rows of the 1,000,000 randomly generated values match the predicate but the expensive table scan happens 16 times to locate these.
This would be a good candidate for materializing the intermediate result. The equivalent temp table rewrite took 25 seconds.
INSERT INTO #T
SELECT *,
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What is the difference between __init__ and __call__?
... answered Mar 12 '12 at 8:13
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Signed to unsigned conversion in C - is it always safe?
...t to the wrong parts within the answer ?
– Shmil The Cat
Sep 3 '14 at 10:27
For converting signed to unsigned, we add ...
Making Python loggers output all messages to stdout in addition to log file
...places but in addition always be copied to stdout . This is to avoid duplicating messages like:
10 Answers
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show all tags in git log
... can see it in output of "git show <tag>" and also in output of "git cat-file -p <tag>", where <tag> is heavyweight tag, e.g. v1.6.3 in git.git repository),
and also is default name of tag reference (reference in "refs/tags/*" namespace) pointing to a tag object.
Note that the...
Git, rewrite previous commit usernames and emails
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This just made duplicates of all the commits with the email I wanted to change. Doesn't appear to rewrite history. @Olivier Verdier's solution worked for me.
– Jake Wilson
Nov 21 '17 at 16:10
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Jump to matching XML tags in Vim
...st understand 'i'. cit changes the interior of the tag - just the content. cat change all of the tag - the contents and also the tag itself, both opening and closing.
– Edward
Aug 11 '13 at 22:03
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Bash set +x without it being printed
... on) set -x ;;
off) set +x ;;
esac
}
alias xtrace='{ _xtrace $(cat); } 2>/dev/null <<<'
This allows you to enable and disable xtrace as in the following, where I'm logging how the arguments are assigned to variables:
xtrace on
ARG1=$1
ARG2=$2
xtrace off
And you get outpu...
Find running median from a stream of integers
...d Jan 28 '17 at 11:01
Shmil The Cat
4,35422 gold badges2323 silver badges3434 bronze badges
answered May 18 '12 at 18:15
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Git: How to remove file from historical commit?
...cached --ignore-unmatch path/to/mylarge_50mb_file' \
--tag-name-filter cat -- --all
Like the rebasing option described before, filter-branch is rewriting operation. If you have published history, you'll have to --force push the new refs.
The filter-branch approach is considerably more powerfu...