Add varchar support

Author: kyleconroy

postgres/schema.go

@@ -30,6 +30,12 @@ func (c Column) GoType() string {
 		return "int"
 	case "pg_catalog.timestamp":
 		return "time.Time"
+	case "pg_catalog.varchar":
+		if c.NotNull {
+			return "string"
+		} else {
+			return "sql.NullString"
+		}
 	default:
 		return "interface{}"
 	}

testdata/ondeck/schema/0002_venue.sql

@@ -1,9 +1,9 @@
 CREATE TABLE venues (
     id               SERIAL primary key,
     dropped          text,
-    slug             text not null,
-    name             text not null,
-    city             text references city(slug),
-    spotify_playlist text not null,
+    slug             text         not null,
+    name             varchar(255) not null,
+    city             text         references city(slug),
+    spotify_playlist varchar      not null,
     songkick_id      text
 )