dev/benchmarking/ddl/1_06_table_public_language_implementation_version.sql

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-- LANGUAGE_IMPLEMENTATION_VERSION
CREATE TABLE IF NOT EXISTS public.language_implementation_version
(
  language_implementation_version_id SERIAL
  , language_implementation_version citext NOT NULL DEFAULT ''
  , benchmark_language_id integer NOT NULL
  , PRIMARY KEY (language_implementation_version_id, benchmark_language_id)
  , FOREIGN KEY (benchmark_language_id) REFERENCES public.benchmark_language
);
COMMENT ON TABLE public.language_implementation_version
  IS 'The benchmark language implementation or compiler version, e.g. '
     '''CPython 2.7'' or ''PyPy x.y'' or ''gcc 7.3.0'' or '
     '''gcc (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0''.';
COMMENT ON COLUMN public.language_implementation_version.language_implementation_version
  IS 'The version number used in the benchmark environment (e.g. ''2.7'').';

-- CONSTRAINTS
ALTER TABLE public.language_implementation_version
  ADD CONSTRAINT language_implementation_version_check_version_length
  CHECK (char_length(language_implementation_version) < 255);

CREATE UNIQUE INDEX language_implementation_version_unique_index
  ON public.language_implementation_version
    (benchmark_language_id, language_implementation_version);
COMMENT ON INDEX language_implementation_version_unique_index
  IS 'Enforce unique implementation versions for the languages.';