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fix(postgres): support UNIQUE NULLS NOT DISTINCT constraint syntax #839

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Merged
NQPhuc merged 2 commits into from
Mar 9, 2026
Merged

fix(postgres): support UNIQUE NULLS NOT DISTINCT constraint syntax #839

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5fc5fda
fix(postgres): support UNIQUE NULLS NOT DISTINCT constraint syntax
frenzzy Mar 8, 2026
dbdabc0
misc: add comment note
NQPhuc Mar 9, 2026
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8 changes: 8 additions & 0 deletions ...s/dbml-core/__tests__/examples/importer/postgres_importer/input/nulls_not_distinct.in.sql
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
CREATE TABLE "products" (
"id" uuid PRIMARY KEY,
"kind" text NOT NULL,
"name" text
);

ALTER TABLE ONLY "products"
ADD CONSTRAINT "products_kind_name_key" UNIQUE NULLS NOT DISTINCT ("kind", "name");
9 changes: 9 additions & 0 deletions ...bml-core/__tests__/examples/importer/postgres_importer/output/nulls_not_distinct.out.dbml
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@@ -0,0 +1,9 @@
Table "products" {
"id" uuid [pk]
"kind" text [not null]
"name" text

Indexes {
(kind, name) [unique, name: "products_kind_name_key"]
}
}
3 changes: 2 additions & 1 deletion packages/dbml-core/src/parse/ANTLR/parsers/postgresql/PostgreSQLParser.g4
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Expand Up @@ -770,9 +770,10 @@ tableconstraint
| constraintelem
;

// Note: changed from orginal
constraintelem
: CHECK OPEN_PAREN a_expr CLOSE_PAREN constraintattributespec
| UNIQUE (
| UNIQUE nulls_distinct? (
OPEN_PAREN columnlist CLOSE_PAREN c_include_? definition_? optconstablespace? constraintattributespec
| existingindex constraintattributespec
)
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2 changes: 1 addition & 1 deletion packages/dbml-core/src/parse/ANTLR/parsers/postgresql/PostgreSQLParser.interp
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