dev/benchmarking/ddl/1_03_table_public_os.sql

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  to you under the Apache License, Version 2.0 (the
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-- OS
CREATE TABLE IF NOT EXISTS public.os
(
  os_id SERIAL PRIMARY KEY
  , os_name citext NOT NULL
  , architecture_name citext NOT NULL
  , kernel_name citext NOT NULL DEFAULT ''
);
-- @name os. forces retention of an 's' in the Graphile GraphQL api.
COMMENT ON TABLE public.os
  IS E'@name os.\nOperating system name and kernel (version).';
COMMENT ON COLUMN public.os.os_name
  IS 'Operating system name. For example, OSX, Ubuntu, Windows`.';
COMMENT ON COLUMN public.os.architecture_name
  IS 'Operating system architecture; the output of `uname -m`.';
COMMENT ON COLUMN public.os.kernel_name
  IS 'Operating system kernel, or NULL. '
     'On Linux/OSX, the output of `uname -r`. '
     'On Windows, the output of `ver`.';

-- CONSTRAINTS
ALTER TABLE public.os
  ADD CONSTRAINT os_check_os_name_length
  CHECK (char_length(os_name) < 63);

ALTER TABLE public.os
  ADD CONSTRAINT os_check_architecture_name_length
  CHECK (char_length(architecture_name) < 63);

ALTER TABLE public.os
  ADD CONSTRAINT os_check_kernel_name_length
  CHECK (char_length(kernel_name) < 63);

CREATE UNIQUE INDEX os_unique_index
  ON public.os(os_name, architecture_name, kernel_name);
COMMENT ON INDEX public.os_unique_index
  IS 'Enforce uniqueness of os, architecture, and kernel names.';