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Where are the PostgreSQL logs on macOS?
...
Just ask your database:
SELECT
*
FROM
pg_settings
WHERE
category IN( 'Reporting and Logging / Where to Log' , 'File Locations')
ORDER BY
category,
name;
In my case, it's in "/Library/PostgreSQL/8.4/data/pg_log"
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How to drop a list of rows from Pandas dataframe?
... +1, this is the only answer that tells you how to remove a row selecting a column different from the first one.
– Alejo Bernardin
May 3 at 5:31
add a comment
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MySQL InnoDB not releasing disk space after deleting data rows from table
... recreate your table and regain diskspace
Create TBL_B like TBL_A . Insert select data you want to keep from TBL_A into TBL_B. Drop TBL_A, and rename TBL_B to TBL_A. This way is very effective if TBL_A and data that needed to delete is big (delete command in MySQL innodb is very bad performance)
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ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
... table. Following query would be helpful to fetch those non-matching rows:
SELECT child_table.*
FROM child_table
LEFT JOIN parent_table
ON parent_table.referenced_column = child_table.referencing_column
WHERE parent_table.referenced_column IS NULL
Now, you can generally do one (or more) of th...
“Treat all warnings as errors except…” in Visual Studio
In Visual Studio, I can select the "Treat warnings as errors" option to prevent my code from compiling if there are any warnings. Our team uses this option, but there are two warnings we would like to keep as warnings.
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How to disable Django's CSRF validation?
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If you just need some views not to use CSRF, you can use @csrf_exempt:
from django.views.decorators.csrf import csrf_exempt
@csrf_exempt
def my_view(request):
return HttpResponse('Hello world')
You can find more examples and other scenarios in the Django documentation:
https:/...
SQL Server: Maximum character length of object names
...lowing script contained in the blog post before:
DECLARE @i NVARCHAR(800)
SELECT @i = REPLICATE('A', 116)
SELECT @i = 'CREATE TABLE #'+@i+'(i int)'
PRINT @i
EXEC(@i)
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improve this answer
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Where to find extensions installed folder for Google Chrome on Mac?
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You can find all Chrome extensions in below location.
/Users/{mac_user}/Library/Application Support/Google/Chrome/Default/Extensions
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Detect all changes to a (immediately) using JQuery
... FYI: These events will fire with a blank value if the keyboard is used to select a date that is not valid. ie. Feb 30. stackoverflow.com/questions/48564568/…
– Olmstov
Feb 1 '18 at 14:20
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is_null($x) vs $x === null in PHP [duplicate]
...someone strongly suggested that I use is_null() instead as it is specifically designed for the null-evaluation purpose. He also started talking about math or something.
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