LDC-Q2002 — The query reads from a computation that was never declared

What it means

A query can first run a named computation over a package and a case, then read the resulting document as if it were a relation. The reading source names that computation, so the engine can check the name against the computations the query declares. A name with no matching declaration stops the query before any row is read.

Either declare the computation under that name at the head of the query, or fix the source to name the computation that is actually declared.

Example

LawQL

from r in m.rows select r

Fix

LawQL

from r in rules select r

Engine message

The engine reports this in its own wording:

Output

LDC-Q2002: materialization 'm' is not declared.

Related

• Questions to the engine — how a query declares a computation.
• LDC-Q3001 — the cap a declared computation requires.