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User-defined composite types (CREATE TYPE ... AS) can now be decoded as PgComposite in query results and sent as query parameters. Register composite types with CodecRegistry.with_composite_type() providing the OID and field descriptors (name/OID pairs). Both PreparedQuery (binary format) and SimpleQuery (text format) decode registered composites. Nested composites and composite arrays are supported. Depth-guarded recursion prevents stack overflow from pathological schemas. PgComposite.from_fields provides a safe construction API for query parameters — each field's name, OID, and value stay together, eliminating the misalignment risk of parallel arrays. Design: #188
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User-defined composite types (
CREATE TYPE ... AS (...)) can now be decoded asPgCompositein query results and sent as query parameters. Register composite types withCodecRegistry.with_composite_type()providing the OID and field descriptors (name/OID pairs).Both
PreparedQuery(binary format) andSimpleQuery(text format) decode registered composites. Nested composites and composite arrays are supported. Depth-guarded recursion prevents stack overflow from pathological schemas.New files:
pg_composite.pony—PgCompositeval class with positional/named field access andfrom_fieldsconvenience constructor_composite_encoder.pony— binary composite wire format encoder_test_composite.pony— 57 unit tests + 3 integration testsexamples/composite-type/— two-phase OID discovery exampleDesign: #188