From 6b26a4bd930f580fa59ee0e40717d7e1356c3652 Mon Sep 17 00:00:00 2001
From: Ethan Dalool <git@voussoir.net>
Date: Sun, 21 Aug 2022 13:54:44 -0700
Subject: [PATCH] Add method explain which shows explain query plan.

---
 voussoirkit/worms.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/voussoirkit/worms.py b/voussoirkit/worms.py
index 411559c..3ce863d 100644
--- a/voussoirkit/worms.py
+++ b/voussoirkit/worms.py
@@ -337,6 +337,10 @@ class Database(metaclass=abc.ABCMeta):
         row = self.select_one(query, bindings)
         return (row is not None)
 
+    def explain(self, query, bindings=None) -> str:
+        exp = self.execute('EXPLAIN QUERY PLAN ' + query, bindings)
+        return '\n'.join(str(tuple(x)) for x in exp.fetchall())
+
     def get_object_by_id(self, object_class, object_id):
         '''
         Select an object by its ID.