The SQL used to manage dates and times varies by database type. The code to generate this SQL (e.g., DATE_FORMAT() or FROM_UNIXTIME()) has historically been handled by modules that work with dates and times, wrapped in long switch statements to handle the officially supported databases. (more or less.) A d.o issue raised the possibility of a date abstraction API, but nothing ever came of it.
Similar to #2888, this is code that was created to support PostgreSQL in Silkscreen and is submitted here because the non-PostgreSQL part of the patch is valid for Backdrop, even if all it accomplishes is better encapsulation of database code in the database classes.
Unlike #2888 and #2889, this is a little more invasive, changing the date_sql_handler class in the Date module, and several Views handlers.
As with #2888, I'm submitting this because I consider it good open source etiquette to provide patches to parent projects, even if the patch's true purpose cannot be realized upstream, in this case database independence.
Recent comments
well @herb I cannot believe it, but the webform module was there in modules on the disc, but missing in the listed modules, so I delete the module folder, and downloaded it again. Then...
My Webform Worksheets have disappeared
The only thing I can think of is to make sure Webform module is enabled and that the content type that needs to contain the webforms has Webform enabled for it. Edit the content type and make...
My Webform Worksheets have disappeared
@yorkshirepudding, In the end I fixed it by deleting the config/active folder contents, copying the config/staging/ files into config/active, importing the database again and clearing the caches...
Importing the staged config throws an error: another field with the same name already exists