rdbms-playground

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claude@clouddev1 942222bfc9 constraints: CHECK — check (<expr>) at create table & add column (ADR-0029)

The fourth constraint. `check ( <expr> )` reuses the ADR-0026
WHERE-expression grammar via `Subgrammar`, so a check is
written in the same language as a `where` filter.

- Grammar: a `CHECK_CONSTRAINT` arm joins the shared
  constraint-suffix Choice; `consume_check_expr` extracts the
  parenthesised expression (paren-depth aware) into
  `ColumnSpec.check` / `Command::AddColumn.check`.
- Storage: the parsed `Expr` is compiled once to inline SQL
  (`compile_check_sql` — `compile_expr` + ADR-0028's
  param-inliner) and stored in that form everywhere — a new
  `check_expr` column in `__rdbms_playground_columns`,
  `project.yaml`'s `ColumnSchema.check`, and the column DDL
  emitted by `do_create_table` / `schema_to_ddl`.
- `add column … check` routes through the rebuild primitive
  (SQLite's `ALTER … ADD COLUMN` cannot carry it); a CHECK on
  a serial/shortid column is create-table-only and refused at
  add-column with a friendly message.
- `describe` surfaces the CHECK. ADR-0029 §7/§8 updated to the
  SQL-form decision — double-quoted identifiers, consistent
  with ADR-0028's `explain` display SQL.

1201 tests pass (+8); clippy clean.

2026-05-19 16:42:18 +00:00

app.rs

walker: schema-existence ERROR diagnostics (ADR-0027 step B)

2026-05-19 07:15:58 +00:00

data.rs

create table: column constraints — NOT NULL / UNIQUE / DEFAULT grammar (ADR-0029)

2026-05-19 14:41:29 +00:00

ddl.rs

constraints: CHECK — check (<expr>) at create table & add column (ADR-0029)

2026-05-19 16:42:18 +00:00

expr.rs

command: Operand carries a source span