Use -> operator for SQLite JsonScalarExpression #30745
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roji
commented
Apr 23, 2023
| { | ||
| if (jsonScalarExpression.Path.Count == 1 | ||
| && jsonScalarExpression.Path[0].ToString() == "$") | ||
| // TODO: This trims the leading $ PathSegment, which isn't actually part of the path (but rather path of the JSONPATH language |
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@maumar note this - I think we should remove the $ path segment at the beginning, at the source... It's purely a SQL generation concern, and PostgreSQL would need to ignore it (since it doesn't use JSONPATH for this). Even for SQLite, when there's just a single (non-$) path segment, this PR does JsonColumn ->> 'Foo' (property) or JsonColumn ->> 1 (array), which is simpler and again doesn't need the $.
On a related note, when the JSON expression has no path segments, it shouldn't be created in translation - there's this piece of code here for ignoring/unwrapping it when it's empty.
Does that make sense? If so I can open a separate issue to do that.
maumar
approved these changes
Apr 24, 2023
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Closes #30334