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# Copyright 2018-08 Observational Health Data Sciences and Informatics
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# Licensed under the Apache License, Version 2.0 (the "License");
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sql server script to create OMOP common data model results schema version 6.0

last revised: 27-Aug-2018

Authors:  Patrick Ryan, Christian Reich, Clair Blacketer


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Standardized vocabulary

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--HINT DISTRIBUTE_ON_KEY(subject_id)
CREATE TABLE cohort
(
  cohort_definition_id	BIGINT		NOT NULL ,
  subject_id			BIGINT		NOT NULL ,
  cohort_start_date		DATE		NOT NULL ,
  cohort_end_date		DATE		NOT NULL
)
;


--HINT DISTRIBUTE ON RANDOM
CREATE TABLE cohort_definition (
  cohort_definition_id				    INTEGER			  NOT NULL,
  cohort_definition_name			    VARCHAR(255)	NOT NULL,
  cohort_definition_description		VARCHAR(MAX)	NULL,
  definition_type_concept_id		  INTEGER			  NOT NULL,
  cohort_definition_syntax			  VARCHAR(MAX)	NULL,
  subject_concept_id				      INTEGER			  NOT NULL,
  cohort_initiation_date			    DATE			    NULL
)
;

ALTER TABLE cohort_definition ADD CONSTRAINT xpk_cohort_definition PRIMARY KEY NONCLUSTERED (cohort_definition_id);

ALTER TABLE cohort ADD CONSTRAINT xpk_cohort PRIMARY KEY NONCLUSTERED ( cohort_definition_id, subject_id, cohort_start_date, cohort_end_date  ) ;


CREATE CLUSTERED INDEX idx_cohort_definition_id ON cohort_definition (cohort_definition_id ASC);

CREATE INDEX idx_cohort_subject_id ON cohort (subject_id ASC);
CREATE INDEX idx_cohort_c_definition_id ON cohort (cohort_definition_id ASC);


ALTER TABLE cohort_definition ADD CONSTRAINT fpk_cohort_definition_concept FOREIGN KEY (definition_type_concept_id)  REFERENCES concept (concept_id);

ALTER TABLE cohort_definition ADD CONSTRAINT fpk_subject_concept FOREIGN KEY (subject_concept_id)  REFERENCES concept (concept_id);


ALTER TABLE cohort ADD CONSTRAINT fpk_cohort_definition FOREIGN KEY (cohort_definition_id)  REFERENCES cohort_definition (cohort_definition_id);