fix(completion): treat a bare in-scope table alias as an alias, not an unknown column (#31)

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A bare table alias typed where a column is expected — `… GROUP BY o`,
with `o` aliasing `FROM Orders o` — was a blind spot: completion offered
nothing for `o`, and the hint panel called the in-scope alias an unknown
column (`no such column o on table Orders, ...`).

Completion now offers each FROM source's qualifier (alias-if-present-else
table-name) at a bare sql_expr_ident slot, folded into the column
candidate list; on an exact-qualifier partial the alias source steps
aside so the diagnostic can surface. The bare-reference diagnostic arm
emits a targeted `alias_used_as_column` / `table_used_as_column` hint
("`o` is a table alias — write `o.<column>` ...") after the
projection-alias check, so ORDER-BY alias refs still win and a genuine
unknown column still reports `unknown_column`.

Two guards keep the qualified-form advice correct: SQL only (role
`sql_expr_ident`, so the DSL `expr_column` path keeps `unknown_column`
since the DSL has no `table.column` syntax) and effective-qualifier
match (alias-if-present-else-table, so an aliased source referenced by
its shadowed real name falls through rather than being advised as
`name.<column>`). The diagnostic is a drop-in replacement for
`unknown_column` at the same span/Error severity, so verdict/overlay/hint
paths are unchanged.

ADR-0032 Amendment 3; +10 tests.

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claude@clouddev1

2026-06-12 14:03:00 +00:00

parent 82b9f7f9b9

commit 7e4bc122be

7 changed files with 417 additions and 1 deletions

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docs/adr/README.md

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