feat: extra field

Makefile

@@ -32,7 +32,7 @@ lint:
 format:
 	go install github.com/haunt98/gofimports/cmd/gofimports@latest
 	go install mvdan.cc/gofumpt@latest
-	gofimports -w --company github.com/make-go-great .
+	gofimports -w --company github.com/make-go-great,github.com/haunt98 .
 	gofumpt -w -extra .
 
 gen:

docs/2022-07-31-sql.html

@@ -97,6 +97,21 @@
 [Business] time, data -&gt; convert to unix timestamp milliseconds -&gt; [Database] int64</pre
       >
     </div>
+    <h2>
+      <a
+        id="user-content-extra-field-for-extra-things"
+        class="anchor"
+        aria-hidden="true"
+        href="#extra-field-for-extra-things"
+        ><span aria-hidden="true" class="octicon octicon-link"></span></a
+      >Extra field for extra things
+    </h2>
+    <p>
+      Create new column in database is scary, so I suggest avoid it if you can.
+      How to avoid, first design table with extra field. It is black hole, put
+      everything in there if you want.
+    </p>
+    <p>I always use MySQL json data type for extra field.</p>
     <h2>
       <a
         id="user-content-use-index"

posts/2022-07-31-sql.md

@@ -30,6 +30,14 @@ It looks like this:
 [Business] time, data -> convert to unix timestamp milliseconds -> [Database] int64
 ```
 
+## Extra field for extra things
+
+Create new column in database is scary, so I suggest avoid it if you can.
+How to avoid, first design table with extra field.
+It is black hole, put everything in there if you want.
+
+I always use MySQL json data type for extra field.
+
 ## Use index!!!
 
 You should use index for faster query, but not too much.