From cccf9da8ce04cbca956a7b7305822d429e94b360 Mon Sep 17 00:00:00 2001
From: Robert Steuck <robert.steuck@gmail.com>
Date: Tue, 7 Nov 2023 08:09:19 +0100
Subject: [PATCH] Add value precision workaround to README.md

---
 README.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/README.md b/README.md
index b7184a5..e424f90 100644
--- a/README.md
+++ b/README.md
@@ -310,6 +310,21 @@ Rollup stores both dates and times in the `time` column depending on the interva
 - MySQL: `CAST(time AS date)`
 - SQLite: `date(time)`
 
+### Value Precision
+
+The default value column is of type `:float` which might not have the precision you need. If you need a different precision you can change the type of the value column like this
+
+```ruby
+# some_migration.rb
+def up
+  change_column :rollups, :value, :decimal, precision: 24, scale: 2
+end
+
+def down
+  change_column :rollups, :value, :float
+end
+```
+
 ## Examples
 
 - [Ahoy](#ahoy)