Add indexes to link table and use cr32 hashes to increase speed of lookups

1 files changed, 36 insertions, 0 deletions

diff --git a/database/migrations/2017_02_04_025727_add_link_table_indexes.php b/database/migrations/2017_02_04_025727_add_link_table_indexes.php
new file mode 100644
index 0000000..8db19b7
--- /dev/null
+++ b/database/migrations/2017_02_04_025727_add_link_table_indexes.php
@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddLinkTableIndexes extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('links', function (Blueprint $table)
+        {
+            // Add long_url hashes
+            $table->unique('short_url');
+            $table->string('long_url_hash', 10)->nullable();
+            $table->index('long_url_hash', 'links_long_url_index');
+        });
+
+        DB::query("UPDATE links SET long_url_hash = crc32(long_url)");
+    }
+
+    public function down()
+    {
+        Schema::table('links', function (Blueprint $table)
+        {
+            $table->longtext('long_url')->change();
+            $table->dropUnique('links_short_url_unique');
+            $table->dropIndex('links_long_url_index');
+            $table->dropColumn('long_url_hash');
+        });
+    }
+}