feat(postgrest): add typed ranges to the column-expression surface

[spydon]

Stack 8/8 for SDK-1741, implementing SDK-1755. Base: lukasklingsbo/sdk-1741-7-embedded-relations.

Range columns had no Dart type: supabase_typegen mapped int4range, tstzrange and the rest to Object, so the range operators took a Postgres literal as a String and existed on every column. Books.title.rangeLt('[2,25)') compiled and failed on the server.

PostgrestRange<Bound> is the value: closedOpen, closed, open and openClosed constructors, null for an unbounded side, which is always exclusive since that is the form Postgres canonicalizes an omitted bound to, empty(), and parse for the literal PostgREST returns, including the quoted timestamp bounds Postgres emits (["2024-01-01 00:00:00+00",)). It renders through the same value renderer filters use, so a DateTime bound is ISO 8601 and a bound is quoted only when the literal requires it. parse reads the way Postgres does: an unquoted infinity or -infinity bound is unbounded, since Dart has no infinite DateTime, a doubled quote inside a quoted bound is a quote, and a stray bracket inside a bound is a FormatException.

The range operators move onto range columns. contains, containedBy, overlaps, rangeLt, rangeGt, rangeGte, rangeLte and rangeAdjacent are an extension on PostgrestFilterableExpression<Row, PostgrestRange<Bound>> and take a PostgrestRange<Bound>, so they exist only on range columns and the bound type is checked; containsElement(Bound) covers during=cs.2024-06-01, which had no spelling before. The string forms containsRange, containedByRange, overlapsRange and the String-taking rangeLt family are removed. The JSON forms stay on every filterable expression, pending SDK-1760.

supabase_typegen gains a range kind with a bound kind (int4range/int8range to int, numrange to num, daterange/tsrange/tstzrange to DateTime), emits PostgrestColumn<Row, PostgrestRange<int>>, parses the literal in the row getter and renders it back in the insert and update types with the same timestamp rules the scalar columns use: date bounds date-only, timestamp bounds as local wall time, timestamptz bounds in UTC. Range arrays stay List<String> like the other non-scalar array elements.

A hand-written namespace that types a range column as String or Object loses the range operators, with raw('sl.[2,25)') as the fallback. That is the contract the array operators already impose.

Summary by CodeRabbit

• New Features

  • Added typed PostgreSQL range values with inclusive, exclusive, unbounded, empty, parsing, rendering, and equality support.
  • Added dedicated range filters for containment, overlap, comparison, and adjacency operations.
  • Added range serialization and deserialization for database queries and updates.
  • Added automatic generation of typed range fields for integer, numeric, date, and timestamp ranges.

• Documentation

  • Documented typed range columns and range filter usage.

• Tests

  • Added coverage for range parsing, rendering, filtering, escaping, equality, and generated models.

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• packages/postgrest/lib/src/postgrest_range.dart
• packages/postgrest/test/postgrest_range_test.dart

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📝 Walkthrough

Walkthrough

Changes

Typed PostgreSQL range support

Layer / File(s)	Summary
Range value and filter APIs packages/postgrest/lib/src/postgrest_range.dart, packages/postgrest/lib/src/postgrest_filter_operators.dart, packages/postgrest/lib/src/postgrest_filter.dart, packages/postgrest/lib/src/postgrest_column_expression.dart	Adds PostgrestRange parsing, rendering, equality, and typed range filter operators. Removes the former string-specific range methods.
PostgREST range validation packages/postgrest/test/postgrest_range_test.dart, packages/postgrest/test/postgrest_filter_operators_test.dart, packages/postgrest/test/typed_query_test.dart	Tests range parsing, quoting, serialization, equality, DateTime bounds, containment, comparisons, and query output.
Range schema metadata and code generation packages/supabase_typegen/lib/src/schema_description.dart, packages/supabase_typegen/lib/src/generator_metadata_parser.dart, packages/supabase_typegen/lib/src/dart_generator.dart, packages/supabase_typegen/test/goldens/*	Recognizes PostgreSQL range types and generates typed PostgrestRange fields with bound-specific parsing and serialization.
Generator contracts and SDK compliance packages/supabase_typegen/test/*, packages/supabase_typegen/README.md, sdk-compliance.yaml	Adds generator coverage, documents range typing, and updates supported symbols for range values and filters.

Estimated code review effort: 4 (Complex) | ~45 minutes

Sequence Diagram(s)

sequenceDiagram
  participant DatabaseSchema
  participant MetadataParser
  participant DartGenerator
  participant GeneratedClient
  participant PostgREST
  DatabaseSchema->>MetadataParser: describe range column
  MetadataParser->>DartGenerator: provide range and bound types
  DartGenerator->>GeneratedClient: generate PostgrestRange field
  GeneratedClient->>PostgREST: serialize typed range filter or value
  PostgREST-->>GeneratedClient: return range literal

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Suggested reviewers: grdsdev

Merge Risk: 🟡 Moderate · up to 22eb2

This PR adds typed PostgreSQL range parsing and generated range fields. Finite infinity bounds can still be converted to unbounded sides, potentially producing incorrect range values or filters, so this correctness issue should be resolved before merge.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding typed range support to the PostgREST column-expression surface.

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• Create PR with unit tests
• Commit unit tests in branch lukasklingsbo/sdk-1741-8-typed-ranges

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[grdsdev]

Reviewed the diff: filter/escaping logic, ordering, embeds, ranges, aggregates and casts, and the typegen relation-naming are all correct and well tested.

[grdsdev]

Not approving yet — found a real parsing bug:

Infinity bounds crash on read: PostgrestRange.parse never special-cases the literal infinity/-infinity bound text (only handles the whole-literal empty and the unbounded ,)/(, shorthand). Postgres commonly represents open-ended date/timestamp ranges with an explicit infinity bound (e.g. [2024-01-01,infinity)), and PostgREST returns that string as-is. The generated typegen code for date/timestamp/timestamptz range bounds calls DateTime.parse directly on the bound text, so DateTime.parse('infinity') throws a FormatException — any app reading a row with an infinite date/timestamp range bound crashes. No test currently covers this case.

Separately (lower confidence, worth a look): _splitBounds may not reject some malformed literals with unbalanced trailing brackets, silently absorbing a stray character into the bound text instead of throwing.

Happy to approve once the infinity-bound case is handled (and ideally tested).

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Actionable comments posted: 2

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Inline comments:
In `@packages/postgrest/lib/src/postgrest_range.dart`:
- Line 145: Update PostgrestRange parsing and _splitBounds so explicit
PostgreSQL infinity tokens remain represented as bounds rather than being
converted to null, while null continues to mean an omitted bound. Add or use a
Bound representation that safely handles infinity without passing it to
DateTime.parse, and update the existing infinity tests to cover both explicit
infinity and omitted-bound forms.
- Around line 15-42: Update all non-empty PostgrestRange
constructors—closedOpen, closed, open, and openClosed—so lowerInclusive and
upperInclusive are false whenever the corresponding lower or upper bound is
null, while preserving their declared inclusivity for non-null bounds.

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📥 Commits

Reviewing files that changed from the base of the PR and between 9207463 and e8bf87c.

📒 Files selected for processing (17)

• packages/postgrest/lib/src/postgrest_column_expression.dart
• packages/postgrest/lib/src/postgrest_filter.dart
• packages/postgrest/lib/src/postgrest_filter_operators.dart
• packages/postgrest/lib/src/postgrest_range.dart
• packages/postgrest/lib/src/postgrest_typed_builder.dart
• packages/postgrest/test/postgrest_filter_operators_test.dart
• packages/postgrest/test/postgrest_range_test.dart
• packages/postgrest/test/typed_query_test.dart
• packages/supabase_typegen/README.md
• packages/supabase_typegen/lib/src/dart_generator.dart
• packages/supabase_typegen/lib/src/generator_metadata_parser.dart
• packages/supabase_typegen/lib/src/schema_description.dart
• packages/supabase_typegen/test/dart_generator_test.dart
• packages/supabase_typegen/test/generator_metadata_parser_test.dart
• packages/supabase_typegen/test/goldens/hostile_fixture.dart
• packages/supabase_typegen/test/goldens/hostile_schema.dart
• sdk-compliance.yaml

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• packages/postgrest/lib/src/postgrest_column_expression.dart

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