Resolves#2677
- Implements the modifier for Floor on the datetime object.
- Implements the modifier for Ceiling on the datetime object.
- Includes additional testing changes in testing/scalar-functions-
datetime.test to test the sql functionality.
Consolidation PR of #2678 and #2679 since the functions ended up being
much more complicated than I initially thought and had to be done in a
single PR.
Closes#2757
When adding tests for extensions, please follow these guidelines:
Tests that verify the internal logic or behavior of a particular extension should go into cli_tests/extensions.py.
Tests that verify how extensions interact with the database engine, such as virtual table handling, should be written
in TCL (see vtab.test as an example).
To check which extensions are available in TCL, or to add a new one, refer to the tester.tcl file and look at the extension_map.
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