Merge pull request #2 from kids-first/remove-null-constraint

🔥🐛 Remove not null constraint on vocabulary_reference
kids-first · Nov 15, 2018 · b53f696 · b53f696
2 parents 939c24e + 7e4b20c
commit b53f696
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/PostgreSQL/OMOP CDM postgresql ddl.txt b/PostgreSQL/OMOP CDM postgresql ddl.txt
@@ -62,7 +62,7 @@ CREATE TABLE concept (
 CREATE TABLE vocabulary (
   vocabulary_id			VARCHAR(20)		NOT NULL,
   vocabulary_name		VARCHAR(255)	NOT NULL,
-  vocabulary_reference	VARCHAR(255)	NOT NULL,
+  vocabulary_reference	VARCHAR(255),	
   vocabulary_version	VARCHAR(255)	NULL,
   vocabulary_concept_id	INTEGER			NOT NULL
 )