Postgres support (user defined types)

[nene]

• CREATE TYPE
• DROP TYPE
• ALTER TYPE

[maheshsundaram]

Thanks for documenting this! I would be glad to help out if I can figure out how. If you have any time and is convenient for you, can you point me to where I can begin?

[nene]

I guess you can look at existing commits to see how. This one might be a good start: 00adcae

The trickiest bit is figuring out the structure of the resulting syntax tree. For CREATE TYPE I guess it should be something like:

export interface CreateTypeStmt extends BaseNode {
  type: "create_type_stmt";
  createKw: Keyword<"CREATE">;
  typeKw: Keyword<"TYPE">;
  name: EntityName;
  // ENUM definition is probably the simplest, though others should fit here as well
  definition?: AsClause<EnumTypeDefinition>;
}

export interface EnumTypeDefinition extends BaseNode {
  type: "enum_type_definition";
  enumKw: Keyword<"ENUM">;
  values: ParenExpr<ListExpr<StringLiteral>>;
}