fix: parser no longer breaks on encountering indexes that contain expression columns

pkg/schema/table.go

@@ -39,6 +39,7 @@ type Index struct {
 	Columns   []string
 	IsUnique  bool `db:"is_unique"`
 	// TODO: `where ...` for partial indexes
+	// TODO: identify columns that are expressions
 }
 
 type Schema struct {

pkg/schema/views.sql

@@ -33,7 +33,8 @@ create temporary view indexes as
 
 create temporary view index_columns as
     select indexes.index_name,
-           idx_cols.name as column_name,
+           idx_cols.cid as column_idx,
+           ifnull(idx_cols.name, '') as column_name,
            idx_cols.seqno as rank
       from indexes
       join pragma_index_info(indexes.index_name) as idx_cols;