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Heroku Postgres - terminate hung query (idle in transaction)

...icient: select pg_terminate_backend(1234); If you have shell access and root or postgres permissions you can also do it from the shell. To "cancel" one can do: kill -INT 1234 and to "terminate", simply: kill 1234 DO NOT: kill -9 1234 ... that will often result in the the whole postgres ...
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How to customize a requirements.txt for multiple environments?

...equirements into a modular folder hierarchy like this: `-- django_project_root |-- requirements | |-- common.txt | |-- dev.txt | `-- prod.txt `-- requirements.txt The files' contents would look like this: common.txt: # Contains requirements common to all environments req1==1.0 req2==1.0 r...
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Select rows which are not present in other table

... records where join doesn't exist Similar question on dba.SE targeted at MySQL: Select rows where value of second column is not present in first column share | improve this answer | ...
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Advantages and disadvantages of GUID / UUID database keys

...of GUIDs as Primary Keys (SQL Server 2000) Myths, GUID vs. Autoincrement (MySQL 5) This is realy what you want. UID Pros Unique across every table, every database, every server Allows easy merging of records from different databases Allows easy distribution of databases across multiple servers ...
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Database Design for Revisions?

...le should contain all columns present in the first, Records table. E.g. in mysql you can easily create table with the same structure as another table (create table X like Y). And, when you are about to change structure of the Records table in your live database, you have to use alter table commands ...
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How to include layout inside layout?

... Why put the TextView in a RelativeLayout and not as the root view? – Florian Walther Mar 27 '18 at 12:36 ...
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Maven project.build.directory

... ...so project.base.dir points to the root directory of the project where the pom.xml is. That's why after that, project.build.directory defined by Maven is ${project.basedir}/target. Thanks guys, I didn't know this. – evaldeslacasa ...
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Should the folders in a solution match the namespace?

...ough. The rules we follow are: Project/assembly name is the same as the root namespace, except for the .dll ending Only exception to the above rule is a project with a .Core ending, the .Core is stripped off Folders equals namespaces One type per file (class, struct, enum, delegate, etc.) makes i...
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java.util.Date vs java.sql.Date

... My mysql column is a datetime, but doing ps.setDate(new java.sql.Date(myObject.getCreatedDate().getTime())); I am loosing the milliseconds portion, how to fix this? – Blankman Apr 23 '12 at...
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Should I be concerned about excess, non-running, Docker containers?

... those files which are required to run that piece of software (for example mysql, redis etc.) with basic configurations in a container environment. When you create a container using an image, a small section of resources from your system are isolated with the help of namespacing and cgroups, and the...