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Added new DateTime functions #705
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…olumns to unique constraints if they exist, when they are necessary.
…ecognize union relations were different, added AddForeignKey support for union lens
…ew version of unique constraint inference for UnionNodes
…disjoint columns if they are not already unique by themselves. Also removed unnecessary warning from JsonUnionLens
… do not need to compute disjoint variables
…ovara-feature/union-lens
…c JSON element keys (instead, a BasicLens should be added manually above it)
…lightweight tests for nested data structure access
…attenLens (currently hardcoded to ARRAY<STRING>, should be made generic)
…ntop/ontop into feature/new-datetime-functions
…prefix obdaf for new functions
bcogrel
approved these changes
Jul 13, 2023
Thanks Damian, great features! |
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Added support for the following new DateTime SPARQL functions:
Regarding dateTrunc:
Format:
Not all granularities are supported by all dialects.
Only constants are supported for the date-part parameter.
Regarding extraction functions:
Not all granularities are supported by all dialects, but I implemented alternative approaches to extract all granularities anyways.
Prefix
obdaf
:<https://w3id.org/obda/functions#>