[release/6.0] Query: Use type mapping from IDbFunction while translating (#27995) #29216
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Resolves #27954
Resolves #27524
Resolves #29204
Description
Custom mappings to database functions are not using the correct type mappings for parameters of the functions. This makes it impossible to map these database functions. These issues have been fixed and tested in EF7, and this change brings the fixes back to LTS EF Core 6.0, since there are no workarounds.
Customer impact
Impossible to map database functions where the type mapping for parameters is important. There is no known workaround.
How found
Multiple customer reports.
Regression
No.
Testing
These issues have been fixed and tested in EF7.
Risk
Low; correct type mappings now used.