Q042warning

Unused parameter

A parameter line names a placeholder that the query never uses.

db/queries/example.sql:2:4: warning[Q042]: parameter 2 declared as "unused" but not referenced in query

   |
 2 | -- $2 as sgl.param(unused)
   |    ^^^^^^^^^^^^^^^^^^^^^^^

Printed by sgl from a small PostgreSQL reproduction project.

When it is reported

The parameter would be generated and passed, but nothing in the SQL reads it.

Remove the parameter line, or use the placeholder.

$ sgl explain Q042

Look for UnreferencedParameter in Seagull's source to see where it is reported.