inline ArrowErrorCode PostgresType::FromSchema()

in c/driver/postgresql/postgres_type.h [488:530]

• 41 lines of code
• 17 McCabe index (conditional complexity)

inline ArrowErrorCode PostgresType::FromSchema(const PostgresTypeResolver& resolver,
                                               ArrowSchema* schema, PostgresType* out,
                                               ArrowError* error) {
  ArrowSchemaView schema_view;
  NANOARROW_RETURN_NOT_OK(ArrowSchemaViewInit(&schema_view, schema, error));

  switch (schema_view.type) {
    case NANOARROW_TYPE_BOOL:
      return resolver.Find(resolver.GetOID(PostgresTypeId::kBool), out, error);
    case NANOARROW_TYPE_INT8:
    case NANOARROW_TYPE_UINT8:
    case NANOARROW_TYPE_INT16:
      return resolver.Find(resolver.GetOID(PostgresTypeId::kInt2), out, error);
    case NANOARROW_TYPE_UINT16:
    case NANOARROW_TYPE_INT32:
      return resolver.Find(resolver.GetOID(PostgresTypeId::kInt4), out, error);
    case NANOARROW_TYPE_UINT32:
    case NANOARROW_TYPE_INT64:
      return resolver.Find(resolver.GetOID(PostgresTypeId::kInt8), out, error);
    case NANOARROW_TYPE_FLOAT:
      return resolver.Find(resolver.GetOID(PostgresTypeId::kFloat4), out, error);
    case NANOARROW_TYPE_DOUBLE:
      return resolver.Find(resolver.GetOID(PostgresTypeId::kFloat8), out, error);
    case NANOARROW_TYPE_STRING:
      return resolver.Find(resolver.GetOID(PostgresTypeId::kText), out, error);
    case NANOARROW_TYPE_BINARY:
    case NANOARROW_TYPE_FIXED_SIZE_BINARY:
      return resolver.Find(resolver.GetOID(PostgresTypeId::kBytea), out, error);
    case NANOARROW_TYPE_LIST:
    case NANOARROW_TYPE_LARGE_LIST:
    case NANOARROW_TYPE_FIXED_SIZE_LIST: {
      PostgresType child;
      NANOARROW_RETURN_NOT_OK(
          PostgresType::FromSchema(resolver, schema->children[0], &child, error));
      return resolver.FindArray(child.oid(), out, error);
    }

    default:
      ArrowErrorSet(error, "Can't map Arrow type '%s' to Postgres type",
                    ArrowTypeString(schema_view.type));
      return ENOTSUP;
  }
}