Added comment about hidden columns

Synphonyte · Jan 18, 2022 · 2857d03 · 2857d03
1 parent b351112
commit 2857d03
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/diesel_cli/src/infer_schema_internals/sqlite.rs b/diesel_cli/src/infer_schema_internals/sqlite.rs
@@ -125,6 +125,11 @@ pub fn get_table_data(
 ) -> QueryResult<Vec<ColumnInformation>> {
     let sqlite_version = get_sqlite_version(conn);
     let query = if sqlite_version >= SqliteVersion::new(3, 26, 0) {
+        /*
+         * To get generated columns we need to use TABLE_XINFO
+         * This would return hidden columns as well, but those would need to be created at runtime
+         * therefore they aren't an issue.
+         */
         format!("PRAGMA TABLE_XINFO('{}')", &table.sql_name)
     } else {
         format!("PRAGMA TABLE_INFO('{}')", &table.sql_name)