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Reference: Reads and writes

Reads and writes · rule

query.condition_unsupported

Query condition is not one an index can serve.

Area 6, Reads and writes; not declinable; the next step is usually the agent's.

example
type Title = Text {    max_length: 80}entity Book {    id: Uuid    title: Title    subtitle: Title?    available: Bool}query books_after(title: Book.title) -> List<Book> {    from: Book    where: Book.title > title    order: [Book.title asc]    limit: 20}
text
error: `Book.title > title` isn't a condition a query can use --> main.jadpo:14:12   |14 |     where: Book.title > title   |            ^^^^^^^^^^^^^^^^^^ not an indexable condition  reason: `>` orders numbers, times, dates, durations and quantities, as it does in a body, and `Book.title` is `Title`.  next: Compare `Book.title` with `==`, `!=` or `in` (agent)  rule: query.condition_unsupported  help: https://jadpo.dev/docs/errors/query.condition_unsupportedcheck failed: 1 error, 1 file

A standard operation stands where a field does only when it has an exact SQL form ("Operations in conditions"). text.lower has none, since PostgreSQL's would follow the database's collation:

example
type Title = Text {    max_length: 80}entity Book {    id: Uuid    title: Title}query books_titled(title: Book.title) -> List<Book> {    from: Book    where: text.lower(Book.title) == title    order: [Book.title asc]    limit: 20}
text
error: `text.lower(Book.title) == title` isn't a condition a query can use --> main.jadpo:12:12   |12 |     where: text.lower(Book.title) == title   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not an indexable condition  reason: `text.lower` has no SQL form, an expression PostgreSQL works out exactly as the code does (area 19, "SQL forms"), so the database can't decide this condition.  next: Compare `Book.title` itself, or keep what the condition needs in a field of its own (agent)  rule: query.condition_unsupported  help: https://jadpo.dev/docs/errors/query.condition_unsupportedcheck failed: 1 error, 1 file

Markdown for agents: /docs/errors/query.condition_unsupported.md.Built from Jadpo main at a707efb.