diff --git a/libs/aml/resources/full.aml b/libs/aml/resources/full.aml
index ceff76306..f9a682d6f 100644
--- a/libs/aml/resources/full.aml
+++ b/libs/aml/resources/full.aml
@@ -79,7 +79,7 @@ type slug | anonymous type
 type uid int {tags: [generic]} # alias type
 type cms.post_status (draft, published, archived) # enum type
 type position {x int, y int} # struct type
-type box `(INTERNALLENGTH = 16, INPUT = lower, OUTPUT = lower)` # custom type
+type box `(INPUT = lower, OUTPUT = lower, INTERNALLENGTH = 16)` # custom type
 
 namespace social.
 
diff --git a/libs/aml/resources/full.json b/libs/aml/resources/full.json
index afc941a27..39a9e049a 100644
--- a/libs/aml/resources/full.json
+++ b/libs/aml/resources/full.json
@@ -224,7 +224,7 @@
     {"name": "uid", "alias": "int", "extra": {"line": 79, "statement": 15, "tags": ["generic"], "comment": "alias type"}},
     {"schema": "cms", "name": "post_status", "values": ["draft", "published", "archived"], "extra": {"line": 80, "statement": 16, "comment": "enum type"}},
     {"name": "position", "attrs": [{"name": "x", "type": "int"}, {"name": "y", "type": "int"}], "extra": {"line": 81, "statement": 17, "comment": "struct type"}},
-    {"name": "box", "definition": "(INTERNALLENGTH = 16, INPUT = lower, OUTPUT = lower)", "extra": {"line": 82, "statement": 18, "comment": "custom type"}}
+    {"name": "box", "definition": "(INPUT = lower, OUTPUT = lower, INTERNALLENGTH = 16)", "extra": {"line": 82, "statement": 18, "comment": "custom type"}}
   ],
   "extra": {
     "comments": [{"line": 1, "comment": ""}, {"line": 2, "comment": "Full Schema AML"}, {"line": 3, "comment": ""}],
diff --git a/libs/aml/resources/full.md b/libs/aml/resources/full.md
index 3d63d6ca5..d938d54ca 100644
--- a/libs/aml/resources/full.md
+++ b/libs/aml/resources/full.md
@@ -165,7 +165,7 @@ STRUCT:
 
 ### box
 
-EXPRESSION: (INTERNALLENGTH = 16, INPUT = lower, OUTPUT = lower)
+EXPRESSION: (INPUT = lower, OUTPUT = lower, INTERNALLENGTH = 16)
 
 ## Diagram
 
diff --git a/libs/parser-sql/resources/full.postgres.sql b/libs/parser-sql/resources/full.postgres.sql
index b90ad32ce..617584e99 100644
--- a/libs/parser-sql/resources/full.postgres.sql
+++ b/libs/parser-sql/resources/full.postgres.sql
@@ -16,7 +16,7 @@ COMMENT ON TYPE slug IS 'anonymous type';
 -- CREATE TYPE uid AS int; -- type alias not supported on PostgreSQL
 CREATE TYPE cms.post_status AS ENUM ('draft', 'published', 'archived');
 CREATE TYPE position AS (x int, y int);
-CREATE TYPE box (INTERNALLENGTH = 16, INPUT = lower, OUTPUT = lower);
+CREATE TYPE box (INPUT = lower, OUTPUT = lower, INTERNALLENGTH = 16);
 
 --
 -- Full Schema AML
diff --git a/libs/parser-sql/src/postgresAst.ts b/libs/parser-sql/src/postgresAst.ts
index 8e244fe95..540d6586d 100644
--- a/libs/parser-sql/src/postgresAst.ts
+++ b/libs/parser-sql/src/postgresAst.ts
@@ -16,7 +16,7 @@ export type CommentStatementAst = { kind: 'Comment', object: { kind: CommentObje
 export type CreateExtensionStatementAst = { kind: 'CreateExtension', ifNotExists?: TokenInfo, name: IdentifierAst, with?: TokenInfo, schema?: {name: IdentifierAst} & TokenInfo, version?: {number: StringAst | IdentifierAst} & TokenInfo, cascade?: TokenInfo } & TokenInfo
 export type CreateIndexStatementAst = { kind: 'CreateIndex', unique?: TokenInfo, concurrently?: TokenInfo, ifNotExists?: TokenInfo, index?: IdentifierAst, only?: TokenInfo, schema?: IdentifierAst, table: IdentifierAst, using?: {method: IdentifierAst} & TokenInfo, columns: IndexColumnAst[], include?: {columns: IdentifierAst[]} & TokenInfo, where?: {predicate: ExpressionAst} & TokenInfo } & TokenInfo
 export type CreateTableStatementAst = { kind: 'CreateTable', schema?: IdentifierAst, table: IdentifierAst, columns: TableColumnAst[], constraints?: TableConstraintAst[] } & TokenInfo
-export type CreateTypeStatementAst = { kind: 'CreateType', schema?: IdentifierAst, type: IdentifierAst, struct?: {attrs: TypeColumnAst[]} & TokenInfo, enum?: {values: StringAst[]} & TokenInfo } & TokenInfo
+export type CreateTypeStatementAst = { kind: 'CreateType', schema?: IdentifierAst, type: IdentifierAst, struct?: {attrs: TypeColumnAst[]} & TokenInfo, enum?: {values: StringAst[]} & TokenInfo, base?: {name: IdentifierAst, value: ExpressionAst}[] } & TokenInfo
 export type DropStatementAst = { kind: 'Drop', object: { kind: DropObject } & TokenInfo, entities: TableRefAst[], concurrently?: TokenInfo, ifExists?: TokenInfo, mode?: { kind: DropMode } & TokenInfo } & TokenInfo
 export type InsertIntoStatementAst = { kind: 'InsertInto', schema?: IdentifierAst, table: IdentifierAst, columns?: IdentifierAst[], values: (ExpressionAst | { kind: 'Default' } & TokenInfo)[][], returning?: SelectClauseAst } & TokenInfo
 export type SelectStatementAst = { kind: 'Select', select: SelectClauseAst, from?: FromClauseAst, where?: WhereClauseAst } & TokenInfo
diff --git a/libs/parser-sql/src/postgresParser.test.ts b/libs/parser-sql/src/postgresParser.test.ts
index 966f2f9eb..ee27944d8 100644
--- a/libs/parser-sql/src/postgresParser.test.ts
+++ b/libs/parser-sql/src/postgresParser.test.ts
@@ -240,6 +240,19 @@ describe('postgresParser', () => {
                 ...token(0, 56)
             }]}})
         })
+        // TODO: range
+        test('base', () => {
+            expect(parsePostgresAst("CREATE TYPE box (INPUT = my_box_in_function, OUTPUT = my_box_out_function, INTERNALLENGTH = 16);")).toEqual({result: {statements: [{
+                kind: 'CreateType',
+                type: identifier('box', 12, 14),
+                base: [
+                    {name: identifier('INPUT', 17, 21), value: {column: identifier('my_box_in_function', 25, 42)}}, // FIXME: expressions should be different here (identifier instead of column)
+                    {name: identifier('OUTPUT', 45, 50), value: {column: identifier('my_box_out_function', 54, 72)}},
+                    {name: identifier('INTERNALLENGTH', 75, 88), value: integer(16, 92, 93)},
+                ],
+                ...token(0, 95)
+            }]}})
+        })
     })
     describe('dropStatement', () => {
         test('simplest', () => {
diff --git a/libs/parser-sql/src/postgresParser.ts b/libs/parser-sql/src/postgresParser.ts
index b861835a1..b464d07c5 100644
--- a/libs/parser-sql/src/postgresParser.ts
+++ b/libs/parser-sql/src/postgresParser.ts
@@ -366,32 +366,12 @@ class PostgresParser extends EmbeddedActionsParser {
             const start = $.CONSUME(Create)
             $.CONSUME(Type)
             const table = $.SUBRULE($.tableRefRule)
-            const content = $.OPTION(() => {
-                const as = $.CONSUME(As)
-                return $.OR([
-                    {ALT: () => {
-                        $.CONSUME(ParenLeft)
-                        const attrs: TypeColumnAst[] = []
-                        $.AT_LEAST_ONE_SEP({SEP: Comma, DEF: () => attrs.push(removeUndefined({
-                            name: $.SUBRULE($.identifierRule),
-                            type: $.SUBRULE($.columnTypeRule),
-                            collation: $.OPTION2(() => ({...tokenInfo($.CONSUME(Collate)), name: $.SUBRULE2($.identifierRule)}))
-                        }))})
-                        $.CONSUME(ParenRight)
-                        return {struct: {...tokenInfo(as), attrs: attrs.filter(isNotUndefined)}}
-                    }},
-                    {ALT: () => {
-                        const token = tokenInfo2(as, $.CONSUME(Enum))
-                        $.CONSUME2(ParenLeft)
-                        const values: StringAst[] = []
-                        $.AT_LEAST_ONE_SEP2({SEP: Comma, DEF: () => values.push($.SUBRULE($.stringRule))})
-                        $.CONSUME2(ParenRight)
-                        return {enum: {...token, values: values.filter(isNotUndefined)}}
-                    }},
-                    // TODO: RANGE
-                    // TODO: function
-                ])
-            })
+            const content = $.OPTION(() => $.OR([
+                {ALT: () => ({struct: {...tokenInfo($.CONSUME(As)), attrs: $.SUBRULE(createTypeStructAttrs)}})},
+                {ALT: () => ({enum: {...tokenInfo2($.CONSUME2(As), $.CONSUME(Enum)), values: $.SUBRULE(createTypeEnumValues)}})},
+                // TODO: RANGE
+                {ALT: () => ({base: $.SUBRULE(createTypeBase)})}
+            ]))
             const end = $.CONSUME(Semicolon)
             return removeEmpty({kind: 'CreateType' as const, schema: table.schema, type: table.table, ...content, ...tokenInfo2(start, end)})
         })
@@ -621,6 +601,37 @@ class PostgresParser extends EmbeddedActionsParser {
             return removeUndefined({kind: 'ForeignKey' as const, ...tokenInfo(token), columns, ref, onUpdate, onDelete, constraint})
         })
 
+        const createTypeStructAttrs = $.RULE<() => TypeColumnAst[]>('createTypeStructAttrs', () => {
+            $.CONSUME(ParenLeft)
+            const attrs: TypeColumnAst[] = []
+            $.AT_LEAST_ONE_SEP({SEP: Comma, DEF: () => attrs.push(removeUndefined({
+                name: $.SUBRULE($.identifierRule),
+                type: $.SUBRULE($.columnTypeRule),
+                collation: $.OPTION(() => ({...tokenInfo($.CONSUME(Collate)), name: $.SUBRULE2($.identifierRule)}))
+            }))})
+            $.CONSUME(ParenRight)
+            return attrs.filter(isNotUndefined)
+        })
+        const createTypeEnumValues = $.RULE<() => StringAst[]>('createTypeEnumValues', () => {
+            $.CONSUME(ParenLeft)
+            const values: StringAst[] = []
+            $.AT_LEAST_ONE_SEP({SEP: Comma, DEF: () => values.push($.SUBRULE($.stringRule))})
+            $.CONSUME(ParenRight)
+            return values
+        })
+        const createTypeBase = $.RULE<() => {name: IdentifierAst, value: ExpressionAst}[]>('createTypeBase', () => {
+            $.CONSUME(ParenLeft)
+            const params: {name: IdentifierAst, value: ExpressionAst}[] = []
+            $.AT_LEAST_ONE_SEP({SEP: Comma, DEF: () => {
+                const name = $.SUBRULE($.identifierRule)
+                $.CONSUME(Equal)
+                const value = $.SUBRULE($.expressionRule)
+                params.push({name, value})
+            }})
+            $.CONSUME(ParenRight)
+            return params
+        })
+
         const constraintNameRule = $.RULE<() => ConstraintNameAst>('constraintNameRule', () => {
             const token = $.CONSUME(Constraint)
             const name = $.SUBRULE($.identifierRule)