The QA1/QA2 design: an `explain` prefix command over
`show data` / `update` / `delete` that runs
EXPLAIN QUERY PLAN (without executing the statement) and
renders the result as an annotated tree. Plan steps keep
the engine's own wording; an annotation taxonomy marks
full scans, index use, and the automatic-index "you
should add an index here" case. Introduces a general
styled-output-line mechanism — an OutputLine may carry
per-span styling — realising the per-span theming
ADR-0016 deferred; the plan renderer is its first
consumer. The explained SQL is shown above the tree as
standard, copy-pasteable SQL.
- docs/adr/0028-query-plans.md — the ADR.
- docs/adr/README.md — index entry.
- docs/requirements.md — QA2 [~] -> [ ]; QA1 note
reconciled (designed in ADR-0028).
A debounced `[ERR]` / `[WRN]` marker at the right edge of
the input row, summarising — before submit — whether the
current command would run. Backed by a small
diagnostics-severity model: the walker emits severity-
tagged diagnostics (parse outcome, schema-existence of
table / column names) that the indicator summarises and
the existing highlighting / hint layers detail. Advisory
only — submission is never blocked.
- docs/adr/0027-input-validity-indicator.md — the ADR.
- docs/adr/README.md — index entry.
- docs/requirements.md — new S6 (TUI shell).
The C5a design: a stratified, recursive WHERE-expression
grammar (AND/OR/NOT, comparisons, LIKE, IS NULL, IN,
BETWEEN) for update / delete / show-data filters; show
data gains optional `where` and `limit`. Adds the
`Subgrammar` reference-following grammar node and a
recursive `Expr` AST, built selectively for the
expression fragment.
- docs/adr/0026-complex-where-expressions.md — the ADR.
- docs/adr/README.md — index entry.
- docs/simple-mode-limitations.md — new running list of
simple-mode query boundaries vs. advanced SQL, seeded
from ADR-0026.
- docs/requirements.md — C5a [~] -> [ ] (designed, not
yet implemented); new Documentation section with DOC1.
Implement ADR-0025 — indexes as a DSL DDL feature.
- Grammar: `add index [as <name>] on <T> (<cols>)`, `drop index
<name>` / `drop index on <T> (<cols>)`, plus a `--cascade`
flag on `drop column`.
- db.rs: index operations over the engine's native index
catalog (no metadata table). The rebuild-table primitive now
captures and recreates indexes, so `change column` and the
relationship operations no longer silently drop them.
- `drop column` refuses an indexed column unless `--cascade`,
which drops the covering indexes and reports each.
- Persistence: additive `indexes:` list in `project.yaml`
(version unchanged); round-trips through rebuild/export/import.
- Display: an `Indexes:` section in the structure view and a
nested tables/indexes items panel (S2).
Reconciles requirements.md (C3 index portion, S2 satisfied)
and CLAUDE.md. 1038 tests passing (+31), clippy clean.
ADR-0024 audited as fully implemented. Amend the ADR with a "Phase F
minimal" implementation note (parser.rs retained as the router +
ParseError home) and update the README index line to match.
Reconcile docs/requirements.md against handoffs 10-14: refresh the
test baseline (449 -> 1006), mark U4 (replay) satisfied, correct the
A1 / H1a / H3 progress notes.
Amend handoff-14: §3 flagged items both resolved (ranker kept,
CommandNode.hint_mode removed); §4 rewritten as a concrete next-work
pointer at the reconciled requirements.md.
Closes B2 (rebuild-table reused outside relationships) and
C2 (full add/drop/rename/change-type column operations).
* drop column [from] [table] <T>: <col>
- ALTER TABLE DROP COLUMN (SQLite 3.35+) + metadata
cleanup in __rdbms_playground_columns.
- Refuses PK columns and columns involved in a declared
relationship (drop the relationship first).
* rename column [in] [table] <T>: <old> to <new>
- ALTER TABLE RENAME COLUMN (SQLite 3.25+); SQLite
cascades the rename through FK declarations on other
tables.
- Mirrors the new name into both metadata tables
(__rdbms_playground_columns, __rdbms_playground_relationships)
so describes stay accurate after a rename.
- Refuses identity rename and name collisions.
* change column [in] [table] <T>: <col> (<newtype>)
- Routes through the rebuild_table primitive (ADR-0013)
since SQLite ALTER doesn't support type changes.
INSERT INTO new SELECT FROM old; STRICT typing enforces
cell compatibility, transaction rolls back on mismatch.
- Refuses PK columns, relationship-involved columns,
`serial` target, and no-op same-type changes.
Adds 20 tests (parser + db layer); updates the in-app help
listing. Both prepositions independently optional in each
new command, matching `add column`'s grammar shape.
Total: 449 passing, 0 failing, 0 skipped (up from 429).
Clippy clean.
Known spec gap: column-type-change conversion compatibility
is not yet documented (currently relies on SQLite STRICT
errors); follow-up will close this.
Closes out track 2's ADR-0015 backlog.
* `--resume` CLI flag (L1a, ADR-0015 §7) opens the most-
recently-used project, tracked in <data-root>/last_project.
Mutually exclusive with a positional <project-path>; errors
cleanly to stderr (above the shell prompt) on missing file
or stale recorded path. last_project is rewritten on every
successful project open (startup, load, new, save as,
import).
* Persistent input history (I2-persist, ADR-0015 §12). On
project open, the in-memory navigable history is hydrated
from the tail of history.log (capped at the in-memory cap).
ProjectSwitched gains a `history_entries` payload field;
App::seed_history is the entry point. Pipes inside source
text round-trip via splitn(3); unknown escape sequences are
passed through literally.
* Migration framework scaffold (F3, ADR-0015 §9). New
persistence::migrations module with MigratorRegistry +
migrate_to_latest + ensure_project_yaml_migrated. Empty
in v1 (production registry has no migrators); the loader
runs through it on every project open and is exercised by
tests with a fake v1→v2 migrator. Writes
project.yaml.v<N>.bak before any migrator runs; verifies
each step bumps the version field.
Refreshes docs/requirements.md (A1 / I2 / F3 / E1 / L1a /
test baseline) and adds docs/handoff/20260508-handoff-3.md
covering both Iter 5 and Iter 6.
Total tests: 408 passing, 0 failing, 0 skipped (up from 345
at handoff-2). Clippy clean.
Adds docs/handoff/20260508-handoff-2.md describing the state at
the end of this session: ADR-0015 designed, Iterations 1-4 of
track 2 shipped (file-backed projects with auto-named [temp]
dirs, per-command write-through, rebuild from text on missing
.db, save/save as/new/load/rebuild commands with modal dialogs
and project switching), plus the cleanup pass (--help, in-app
help, post-rebuild message, unmodified-temp cleanup) and the
safety hardening of safely_delete_temp_project. Lists the
next-up moves (Iteration 5: export/import, Iteration 6:
--resume + persistent input history + migration scaffold) and
an end-to-end smoke test.
requirements.md: marks P1-P5, P-NAME-1/2/3, F1, F2, U3, L1 as
[x] with iteration references; adds P-CLEAN-1 for the safe
cleanup; updates A1, I2, H3, L1a progress notes.
CLAUDE.md: updates the project-storage decisions and
deferred-items entry to reflect what's now live vs. still
pending.
Designs track-2 lifecycle and persistence end-to-end: per-command
write-through to db+yaml+csv+history.log gated by the combined db
persistence logic with commit-db-last ordering; existence-only load
with explicit rebuild command; --resume CLI flag backed by
<data-root>/last_project; in-TUI list-with-browse picker; lock file
for single-instance enforcement; fatal-banner-then-quit failure
model (with --resume making restart cheap); fatal CSV row-load
errors with full diagnosis; YYYYMMDD-word-word-word temp naming
with display-name prettifier; collision-checked names for both
temp and user-supplied projects. Project name lives only on the
filesystem (not duplicated in YAML). ADR-0004 and ADR-0007 amended
in place. requirements.md and CLAUDE.md updated; OOS-6 (global
rolling history) tracked as deferred.
DSL data operations (ADR-0014):
- insert into T [(cols)] values (vals); short form
insert into T (vals) omits values keyword for friendlier
syntax.
- update T set ... where col=val | --all-rows; delete from T
where col=val | --all-rows; show data T.
- Value AST (Number/Text/Bool/Null) with per-column-type
validation in the executor: int/real/decimal/bool/date/
datetime/shortid each accept a documented literal shape
and produce friendly format errors naming the column.
- INSERT short form fills non-auto-generated columns in
schema order; auto-fills serial via SQLite and shortid
via the new generator (T2).
- `add column [to table] T: c (type)` -- `to table` now
optional.
Database:
- insert/update/delete via prepared statements with bound
rusqlite::types::Value parameters.
- InsertResult/UpdateResult/DeleteResult: writes return
rows_affected plus the affected row(s) only (not the whole
table), so users see exactly what changed.
- INSERT shows the just-inserted row via last_insert_rowid.
- UPDATE captures matching rowids up-front and fetches them
post-update -- works even if the UPDATE changed the WHERE
column.
- DELETE reports per-relationship cascade effects by row-
count diffing inbound child tables; UPDATE-side cascades
are not yet detected (would need value diffing).
- query_data formats cells (booleans true/false, NULLs as
None).
FK error enrichment:
- Now lists both outbound (INSERT/UPDATE relevance) and
inbound (DELETE/UPDATE on parent relevance) FKs from the
metadata, so RESTRICT errors point at the children
blocking the delete.
- RelationshipSelector has a proper Display impl -- "no
such relationship" reads cleanly.
Relationship display:
- target_table for AddRelationship/DropRelationship now
returns the parent (1-side); structure rendering after
add/drop shows that side's "Referenced by:" entry,
matching the `from <Parent>` direction of the command.
- [ok] summary uses display_subject so relationship
commands show both endpoints (`from P.col to C.col`)
rather than a single misleading table name.
- Auto-name format `<Parent>_<pcol>_to_<Child>_<ccol>`
(matches the from..to direction).
Output rendering and scrolling:
- Wrap-aware scroll: renderer reports both visible-row
count and total wrapped-row count to App; scroll math
caps against actual displayable rows. Long lines wrap;
the bottom line is always reachable; PageUp/PageDown work
correctly even after paging past the buffer top.
- Multi-line messages (FK error enrichment, cascade summary)
split into single-line OutputLines at creation time so
wrap/scroll math agree.
Runtime / events:
- New AppEvent variants for Insert/Update/Delete success
carrying typed result structs; DslDataSucceeded reserved
for show-data queries.
Docs:
- ADR-0014 covers data-op grammar, value model, --all-rows
safety, auto-show.
- requirements.md: C5 done, T2 done, V2 partial (basic data
view), V5 partial (show data added). New entries: C5a
complex WHERE expressions; H1 progress note for FK
enrichment; H1a (strong syntax-help in parse errors).
Tests: 200 passing (183 lib + 17 integration), 0 skipped.
Includes parser, type-validation, DB write/read, FK-failure
enrichment, cascade-delete propagation, focused-auto-show
behaviour, scroll-cap invariants. Clippy clean with nursery
enabled.
DSL:
- add 1:n relationship [as <name>] from <P>.<col> to <C>.<col>
[on delete <action>] [on update <action>] [--create-fk]
- drop relationship <name> | from <P>.<col> to <C>.<col>
- show table <name> for re-displaying a structure on demand
Database (ADR-0013):
- Rebuild-table primitive following SQLite's
ALTER-via-rebuild recipe (foreign_keys=OFF outside tx,
copy-by-name, foreign_key_check before commit). Reusable for
B2 (column drops/renames/type changes).
- ReferentialAction enum (no action / restrict / set null /
cascade); SET DEFAULT awaits column DEFAULTs.
- __rdbms_playground_relationships metadata table -- names,
auto-generated as <Parent>_<pcol>_to_<Child>_<ccol>.
- Type::fk_target_type() validation at declaration; friendly
errors for type mismatch, non-PK target, missing column,
duplicate name.
- describe_table populates symmetric outbound + inbound
relationship lists. drop_table refuses while inbound
references exist; outbound metadata cleaned up alongside drop.
App / UI:
- In-line cursor editing in the input field: Left, Right,
Home, End, Delete, Backspace honoring UTF-8 boundaries.
- PageUp / PageDown scrolls the output buffer; viewport row
count fed back from the renderer via App::note_output_viewport
so scroll is capped against the actual visible area
(regression-tested) and snaps to the bottom on new output.
- Failure messages quote the command portion ("verb target"
failed: ...) for visual clarity; RelationshipSelector has a
proper Display impl so "no such relationship" reads cleanly.
- Structure rendering shows References / Referenced by sections.
Docs:
- ADR-0013 covers naming, metadata table, symmetric view, and
the rebuild-table strategy.
- requirements.md updates: C3 (FK done), B2 (primitive in),
T3 (compound-PK FK still pending). New entries: I1a (cursor
editing -- landed), I1b (Ctrl-A/E and readline shortcuts --
pending), V4 partial scroll, V5 (show family), C3a (modify
relationship -- deferred).
Tests: 154 passing (140 lib + 14 integration), 0 skipped.
Clippy clean with nursery enabled.
claude@clouddev1